阅读说明：本技术 水性表面活性剂组合物和皂条 (Aqueous surfactant composition and soap bar ) 是由 刘兆婷 张洋 顾明浩 C·布鲁恩 于 2020-04-27 设计创作，主要内容包括：本发明涉及表面活性剂组合物,其包含：一种或多种通式(I)的α-磺基脂肪酸二盐(A),R1CH(SO3M1)COOM2(I),其中基团R～(1)是指具有6至18个C原子的直链或支链烷基或烯基且基团M～(1)和M～(2)–互相独立地–选自H、Li、Na、K、Ca/2、Mg/2、铵和链烷醇胺,和一种或多种多糖(B),其选自糊精及其衍生物、淀粉及其衍生物、纤维素及其衍生物,优选地一种或多种通式(II)的糊精(B),其中n是在3至200之间的整数。(The present invention relates to a surfactant composition comprising: one or more alpha-sulfofatty acid di-salts (A), R1CH (SO 3M) of formula (I)1) COOM2(I), wherein the group R 1 Refers to a straight-chain or branched alkyl or alkenyl radical having 6 to 18C atoms and the radical M 1 And M 2 -independently of each other-selected from H, Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines, and one or more polysaccharides (B) selected from dextrins and derivatives thereof, starches and derivatives thereof, celluloses and derivatives thereof, preferably one or more dextrins (B) of general formula (II) wherein n is an integer between 3 and 200.)

1. A surfactant composition comprising

● one or more alpha-sulfofatty acid disalts (A) of the general formula (I),

R¹CH(SO₃M¹)COOM² (I)

wherein the radical R¹Is a straight-chain or branched alkyl or alkenyl radical having from 6 to 16 carbon atoms and the radical M¹And M²-independently of one another-from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines,

● one or more polysaccharides (B) selected from the group consisting of dextrins and derivatives thereof, starches and derivatives thereof, celluloses and derivatives thereof,

wherein the following conditions apply:

● if the surfactant composition comprises one or more sulfonates (E) of the formula (V),

R²CH(SO₃M⁷)COOR³ (V)

wherein the radical R²Is a straight-chain or branched alkyl or alkenyl radical having from 6 to 18 carbon atoms and the radical R³Is a straight-chain or branched alkyl or alkenyl radical having from 1 to 20 carbon atoms, where the radical R³May be logically alkenyl or branched only at 3 carbon atoms, the radical M⁷Selected from Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines, it being the case that the compound (A) -based on the sum of the compounds (A) and (E) -must be present in more than 50% by weight.

2. The surfactant composition according to claim 1, comprising

● one or more alpha-sulfofatty acid disalts (A) of the general formula (I),

R¹CH(SO₃M¹)COOM² (I)

wherein the radical R¹Is a straight-chain or branched alkyl or alkenyl radical having from 6 to 16 carbon atoms and the radical M¹And M²-independently of one another-from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines,

● one or more dextrins (B) of general formula (II),

wherein n is an integer between 3 and 200,

wherein the following conditions apply:

● if the surfactant composition comprises one or more sulfonates (E) of the formula (V),

R²CH(SO₃M⁷)COOR³ (V)

wherein the radical R²Is a straight-chain or branched alkyl or alkenyl radical having from 6 to 18 carbon atoms and the radical R³Is a straight-chain or branched alkyl or alkenyl radical having from 1 to 20 carbon atoms, where the radical R³May be logically alkenyl or branched only at 3 carbon atoms, the radical M⁷Selected from Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines, it being the case that compound (A) -ylMust be present in more than 50% by weight, based on the sum of compounds (A) and (E).

3. The composition according to claim 1 or 2, wherein compound (a) -based on the sum of compounds (a) and (E) -must be present in more than 60 wt. -%, preferably more than 70 wt. -%, more preferably more than 95 wt. -%.

4. Composition according to any one of claims 1 to 3, in which the radical R1 in formula (I) denotes a saturated, straight-chain alkyl radical having 10 to 16C atoms, the proportion of compounds (A) in which the radical R1 is decyl or dodecyl being-based on the total amount of compounds (A) -greater than 60% by weight, in relation to compounds (A).

5. The composition according to any one of claims 1 to 4, wherein the groups M1 and M2 are selected from H (hydrogen) and Na (sodium).

6. The composition according to any one of claims 1 to 5, comprising less than 40 wt. -%, preferably less than 25 wt. -%, most preferably less than 15 wt. -%, based on the weight of the composition, of anionic surfactants other than compounds (A) and (C) of the general formula (III), wherein formula (III) is

R⁴COOM³ (III)，

In formula (III), the radical R⁴Is a straight-chain or branched alkyl or alkenyl radical having from 7 to 19 carbon atoms, R⁴Preference is given to saturated, straight-chain alkyl radicals having from 11 to 15 carbon atoms, where, in connection with the compounds (C), the radicals R⁴The proportion of the compound (C) which is undecyl or tridecyl-based on the total amount of the compound (C) -is greater than 60% by weight of the group M³Selected from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines.

7. Compositions according to any one of claims 1 to 6, characterized in that they are liquid aqueous compositions.

8. Compositions according to any one of claims 1 to 6, characterized in that they are solid compositions.

9. The composition according to any one of claims 1 to 6, wherein compound (A) is present in an amount of 0.1 to 10% by weight for liquid aqueous compositions or 10 to 90% by weight for solid compositions, based on the weight of the composition.

10. The composition according to any one of claims 1 to 6, wherein compound (B) is present in an amount of 0.1 to 10% by weight for liquid aqueous compositions or 1 to 60% by weight for solid compositions, based on the weight of the composition.

11. Use of a composition according to any of claims 1 to 10 for cosmetics, detergents or cleaners.

12. Use of a composition according to any of claims 1 to 10 for a shampoo, a solid surfactant composition, a shower gel, a soap, a syndet, a washing cream, a washing bar, a washing liquor, a scrub formulation, a bubble bath, an oil bath, a shower bath, a soap bar, a shaving foam, a shaving water, a shaving cream, a toothpaste, a mouthwash, a cosmetic water and in the form of a cream.

Technical Field

The present invention relates to surfactant compositions, especially aqueous surfactant compositions and solid surfactant compositions, comprising alpha-sulfofatty acid di-salts and polysaccharides.

Prior Art

Anionic surfactants are part of the most common surface-active compounds and are used for diverse applications in the cosmetic field, in addition to detergents and cleaning agents. Conventional anionic surfactants used in particular in cosmetics are salts of alkyl ether sulfates (alkyl polyether sulfates, fatty alcohol polyglycol ether sulfates, also referred to simply as ether sulfates). They are distinguished by strong foaming power, high cleaning power, low sensitivity to hardness and oils and are widely used for the production of cosmetics, such as shampoos, bubble or shower baths, and for hand dishwashing detergents.

For many current applications, in addition to good interfacial activity, there is a further need for anionic surfactants. High skin compatibility is particularly required in cosmetics. Furthermore, sufficient water solubility, good compatibility with as many active ingredients and adjuvants as possible used in cosmetics, good foaming power and good thickening power are generally required. Especially for hair care compositions, skin compatibility and ease of use are newly developed goals.

Furthermore, there is a need for anionic surfactants that can be made at least in part from biological sources, especially also from renewable raw materials. Furthermore, surfactants which are free of alkoxylating groups and therefore in particular make the production thereof unnecessary using ethylene oxide are also desired.

US application US 2012/208898 discloses aqueous personal care compositions comprising salts of sulfonated fatty acid esters and/or salts of sulfonated fatty acids in combination with alkyl betaines as hair care formulations. Salts of sulfonated fatty acid esters are well tolerated surfactants, but it is difficult to form solid surfactant compositions with these surfactants due to their good water solubility.

It is an object of the present invention to provide a composition for skin cleansing which provides easy rinsing feeling and skin smoothness, softness and less dryness after rinsing. Another object, especially for hair care, is to achieve conditioning without stickiness and long drying times. It is an important objective to improve the drying properties (quick drying effect on hair) of hair care surfactant compositions in order to save time in use.

Anionic surfactants are surfactants which are very commonly used in solid compositions. Previously, solid cleansing bars, which are conventional bars, contain alkali metal salts of fatty acids (soap in the classical sense), but in recent years cleansing bars have also been made from surfactants. Soap bars consisting entirely of synthetic detergent compositions are known as syndet bars, and the combination of salts of fatty acids and surfactants is sold as Combibars. Conventional soaps, which are salts of fatty acids, provide an alkaline environment at pH10.2-10.4 due to hydrolysis in aqueous solution, which causes damage to the epidermis (natural protection of the skin, which typically has an acidic pH of about 5.5-6.5). Disruption of the natural skin barrier through the continued use of these surfactant soaps can result in poor skin tolerance with itching, dehydration and cracking of the epidermis. To overcome these drawbacks, "fatliquoring agents", such as fatty and oily ingredients selected from natural oils, mineral oils, petrolatum, stearic acid or lanolin, or "humectants", such as glycerin, urea and sorbitol, have been incorporated into soap bars, these fatliquoring agents generally causing a sticky feel and increasing drying time. Furthermore, the addition of these additives causes the disadvantages of foaming and poor cleaning properties of the soap. In addition, conventional soaps have undesirable scum or coagulum formation characteristics due to their incompatibility with hard water and their poor solubility of calcium salts.

The same applies in part to the usual fillers of soap which serve to reduce cost and improve handling of the soap bar by providing sufficient firmness. Sodium silicate, talc or borax have been used as the main components for several years. However, these fillers are not very resistant, especially to sensitive skin. In international patent application WO 92/07931, surfactant soap bars of a common anionic surfactant and a polysaccharide are disclosed. Talc, clay, calcium carbonate and dextrin are listed as possible fillers.

Preferred surfactants for use in synthetic detergent bars are alkali metal salts of acyl isethionates, fatty alcohol sulfates or alkyl sulfonates, which are still the surfactants used primarily in surfactant-containing bars.

U.S. patent No.2,894,912 discloses the use of alkali metal salts of esters of isethionic acid; mixing an aliphatic acid; so-called suds boosting detergent salts, such as alkyl aryl sulfonates; water; higher fatty acid soaps; and higher fatty acids.

U.S. patent No.4,100,097 relates to synthetic detergent bars consisting of sodium isethionate coco fatty acid ester and/or sodium lauryl sulfoacetate, paraffin wax, powdered starch, dextrin, coconut oil fatty acid and water.

The necessary amount of syndet in surfactant bars often results in mushy and poor firmness, stickiness, difficult manufacturing, bar cracking and poor lathering properties. Furthermore, the use of these surfactants is currently curtailed for environmental reasons, and alternatives made from raw materials from renewable resources that are free of ethylene oxide and sulfate impurities are becoming increasingly popular.

The same family of patents related to international patent applications WO 03/063819, WO 06/062665 and WO07/133582 discloses combinations of C6 to C22-fatty acid salts, polyols and anionic surfactant mixtures comprising alpha sulfonated alkyl esters and sulfonated fatty acids. These combinations exhibit improved processability and improved post-use sensory properties to the skin. However, high amounts of fatty acid soap of at least 40 wt% still bring with them the disadvantages of conventional fatty acid salt soaps and the main objective is to avoid high amounts of conventional soaps.

From the above it is clear that there is still a need for solid surfactant compositions made from well tolerated detergents, which have a pH close to human skin and show in any case good handling, foaming and cleaning properties. The processing of the solid surfactant composition should be easy to achieve. It is therefore another object to provide anionic surfactants in the form of solid surfactant-containing compositions having good foaming properties, surfactant mildness, good compatibility with water hardness and increased firmness.

It should also be possible to achieve treatment of hair with surfactant compositions in the form of solid surfactant compositions, which should exhibit superior lathering behaviour during rinsing, conditioning and improved drying times compared to commercially available surfactant compositions, for example surfactant bars containing sodium cocoyl isethionate.

Description of the invention

It is an object of the present invention to provide improved surfactant compositions, which are liquid aqueous surfactant compositions or solid compositions, containing well tolerated anionic surfactants.

This object is solved by a surfactant composition comprising

One or more alpha-sulfofatty acid di-salts (A) of general formula (I),

R¹CH(SO₃M¹)COOM²(I)

wherein the radical R¹Is a straight-chain or branched alkyl or alkenyl radical having from 6 to 16 carbon atoms and the radical M¹And M²-independently of one another-from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines,

one or more polysaccharides (B) selected from dextrins and derivatives thereof, starches and derivatives thereof and celluloses and derivatives thereof,

wherein the following conditions apply:

if the surfactant composition comprises one or more sulfonates (E) of the formula (V),

R²CH(SO₃M⁷)COOR³(V)

wherein the radical R²Is a straight-chain or branched alkyl or alkenyl radical having from 6 to 18 carbon atoms and the radical R³Is a straight-chain or branched alkyl or alkenyl radical having from 1 to 20 carbon atoms, where the radical R³May be logically alkenyl or branched only at 3 carbon atoms, the radical M⁷Selected from Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines, it being the case that the compound (A) -based on the sum of the compounds (A) and (E) -must be present in more than 50% by weight.

The surfactant composition is characterized by excellent foaming ability, particularly initial foaming behavior. The initial foaming behaviour plays a very important role in so-called rinse-off products, which are understood to mean products which come into contact with the skin or hair during cleansing or combing but are subsequently rinsed off (e.g. shower gels, shower preparations, shampoos, liquid soaps, etc.). In this field, as large a foam volume as possible is required.

The surfactant composition also has hydrolytic stability in both acidic and alkaline pH ranges and avoids for ecological reasons ingredients comprising ethylene oxide or propylene oxide building blocks and surfactants containing sulfate groups for improved skin and mucosal tolerance.

The surfactant composition also has storage stability at room temperature (23 ℃) for greater than at least 8 weeks without any type of visible change (e.g., turbidity, phase separation, discoloration, etc.) and without a change in viscosity or a change in chemical composition.

The surfactant composition of the present invention is an aqueous surfactant composition, which is a liquid aqueous surfactant composition or a solid composition.

The amount of water in the solid composition is 1 to 20% by weight, preferably 5 to 15% by weight, more preferably 7 to 15% by weight. The amount of water in the liquid aqueous composition is greater than 30 wt%, preferably greater than 40 wt%, more preferably greater than 50 wt%, based on the aqueous composition.

One objective is to reduce the amount of anionic surfactant in personal care and household products due to low skin tolerance. The surfactant composition of the present invention should comprise less than 40 wt%, preferably less than 25 wt%, most preferably less than 15 wt% of anionic surfactant other than compounds (a) and (C), based on the weight of the composition. Other anionic surfactants are often conventional soaps, which are alkali metal salts of fatty acids. In the case of solid compositions, the fatty acids are mainly saturated C12 to C22 fatty acids, in particular stearic acid. Compositions comprising salts of long chain fatty acids, especially stearic acid, are difficult to handle due to their incompatibility with water hardness, poor foaming properties, scum or clot forming characteristics and low skin tolerance due to alkaline pH. The composition of the present invention should therefore comprise less than 30 wt%, preferably less than 20 wt%, most preferably less than 10 wt% of fatty acid salt of stearic acid, based on the weight of the composition.

The present invention preferably provides a surfactant composition comprising

One or more alpha-sulfofatty acid di-salts (A) of general formula (I),

R¹CH(SO₃M¹)COOM²(I)

wherein the radical R¹Is of 6 to 1Straight-chain or branched alkyl or alkenyl of 6 carbon atoms and the radical M¹And M²-independently of one another-from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines,

one or more dextrins (B) of the general formula (II),

wherein n-average degree of polymerization-is an integer between 3 and 200, preferably between 5 and 100, most preferably between 10 and 40,

wherein the following conditions apply:

if the aqueous surfactant composition comprises one or more sulfonates (E) of the formula (V),

R³CH(SO₃M⁵)COOR⁴(V)

wherein the radical R³Is a straight-chain or branched alkyl or alkenyl radical having from 6 to 18 carbon atoms and the radical R⁴Is a straight-chain or branched alkyl or alkenyl radical having from 1 to 20 carbon atoms, where the radical R⁴May be logically alkenyl or branched only at 3 carbon atoms, the radical M⁵Selected from the group consisting of Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines, it being the case that the compound (A) -based on the sum of the compounds (A) and (E) -must be present in more than 50% by weight, preferably more than 60% by weight, more preferably more than 70% by weight, most preferably more than 95% by weight.

Solid compositions comprising anionic surfactants having good foaming properties should have improved properties in terms of anti-block paste properties and faster drying properties to be suitable for treating hair, preferably as hair care compositions for shampooing. Surprisingly, solid compositions comprising alpha-sulfofatty acid disalt and a polysaccharide selected from dextrins and derivatives thereof, starches and derivatives thereof and celluloses and derivatives thereof show improved anti-adhesive properties and have a fast drying performance after treating the hair.

"composition suitable for treating the hair" according to the invention may be any composition suitable for washing the hair, it may be a composition for conditioning the hair (conditioner), it may be a hair film for treating the hair. The solid surfactant composition may be a combo bar or a syndet bar.

The present invention preferably provides a solid surfactant composition comprising

One or more alpha-sulfofatty acid di-salts (A) of general formula (I),

R¹CH(SO₃M¹)COOM²(I)

wherein the radical R¹Is a straight-chain or branched alkyl or alkenyl radical having from 6 to 16 carbon atoms and the radical M¹And M²-independently of one another-from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines,

one or more polysaccharides (B) selected from dextrins and derivatives thereof, starches and derivatives thereof, celluloses and derivatives thereof,

wherein the following conditions apply:

if the surfactant composition comprises one or more sulfonates (E) of the formula (V),

R²CH(SO₃M⁷)COOR³(V)

wherein the radical R²Is a straight-chain or branched alkyl or alkenyl radical having from 6 to 18 carbon atoms and the radical R³Is a straight-chain or branched alkyl or alkenyl radical having from 1 to 20 carbon atoms, where the radical R³May be logically alkenyl or branched only at 3 carbon atoms, the radical M⁷Selected from the group consisting of Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines, it being the case that the compound (A) -based on the sum of the compounds (A) and (E) -must be present in more than 50% by weight, preferably more than 60% by weight, more preferably more than 70% by weight, most preferably more than 95% by weight.

More preferably, the present invention provides a solid surfactant composition comprising

One or more alpha-sulfofatty acid di-salts (A) of general formula (I),

R¹CH(SO₃M¹)COOM²(I)

wherein the radicalsR¹Is a straight-chain or branched alkyl or alkenyl radical having from 6 to 16 carbon atoms and the radical M¹And M²-independently of one another-from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines,

one or more dextrins (B) of the general formula (II),

wherein n-average degree of polymerization-is an integer between 3 and 200, preferably between 5 and 100, most preferably between 10 and 40,

wherein the following conditions apply:

if the surfactant composition comprises one or more sulfonates (E) of the formula (V),

R³CH(SO₃M⁵)COOR⁴(V)

wherein the radical R³Is a straight-chain or branched alkyl or alkenyl radical having from 6 to 18 carbon atoms and the radical R⁴Is a straight-chain or branched alkyl or alkenyl radical having from 1 to 20 carbon atoms, where the radical R⁴May be logically alkenyl or branched only at 3 carbon atoms, the radical M⁵Selected from the group consisting of Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines, it being the case that the compound (A) -based on the sum of the compounds (A) and (E) -must be present in more than 50% by weight, preferably more than 60% by weight, more preferably more than 70% by weight, most preferably more than 95% by weight.

The amount of water in the solid composition is from 1% to 20% by weight, preferably from 5 to 15% by weight, more preferably from 7 to 15% by weight, based on the weight of the composition. The solid composition preferably comprises less than 30 wt%, preferably less than 20 wt%, most preferably less than 10 wt% of the fatty acid salt of stearic acid, based on the weight of the composition.

Compound (A)

Compound (a), referred to herein as alpha-sulfofatty acid di-salt, is essential for aqueous and solid surfactant compositions according to the present invention. They have the formula (I) mentioned above

R¹CH(SO₃M¹)COOM²(I)

Wherein the radical R¹Is a straight-chain or branched alkyl or alkenyl radical having from 6 to 16 carbon atoms and the radical M¹And M²-independently of one another-from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines. Particularly preferred alkanolamines according to the invention are monoethanolamine, diethanolamine, triethanolamine and monoisopropanolamine.

In the present invention, the compound (A) referred to as "alpha-sulfofatty acid disalt" is defined by the formula (I) wherein the group M¹And M²Independently of one another-from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines and thus comprising di-salts and/or mono-salts and/or protonated acids.

In one embodiment, provided that the group R in the surfactant composition¹The fraction of the compound (A) which is an alkenyl group-based on the total amount of the compound (A) -is 3% by weight or less.

In a preferred embodiment, the radical R in the formula (I)¹Refers to a saturated straight-chain radical having from 10 to 16 carbon atoms, where, in the case of the compounds (A), this is the case where the radical R¹The fraction of compounds (A) which are decyl and/or dodecyl-based on the total amount of compounds (A) -is greater than 70% by weight, preferably greater than 80% by weight, more preferably greater than 90% by weight, in particular greater than 95% by weight.

Preferably, the group M in formula (I)¹And M²Is Na.

The liquid aqueous composition typically comprises from greater than 0.1 to 10 wt% of alpha-sulfofatty acid di-salt (a), preferably from greater than 1 to 8%, more preferably from 3 to 6 wt% of alpha-sulfofatty acid di-salt, based on the weight of the composition.

The solid composition typically comprises from 10 to 90 wt% of alpha-sulfofatty acid di-salt (a), preferably from 20 to 70%, more preferably from 30 to 50 wt% of alpha-sulfofatty acid di-salt, based on the weight of the composition.

Compound (a) can be prepared by all methods suitably known to those skilled in the art. A particularly preferred preparation process here is the corresponding carboxylic acidSulfation of the acid. In this case, the corresponding carboxylic acids, in particular the corresponding fatty acids, are reacted with gaseous sulfur trioxide, preferably SO that SO is₃The molar ratio to the fatty acid is used in the range of 1.0:1 to 1.1: 1. The crude product obtained in this way, which is the acidic sulfonated product, is subsequently partially or completely neutralized, preferably completely neutralized with aqueous NaOH. If desired, it is also possible to carry out purification steps and/or bleaching (for adjusting the desired tint of the product).

In a particularly preferred embodiment, the compounds (A) are used in technical-grade form. This means that the corresponding carboxylic acids, in particular natural fatty acids, are sulfonated with gaseous sulfur trioxide, with the result that a mixture of the compounds (A), (C) and (D) is obtained after partial or complete neutralization of the resulting acidic sulfonation product. By corresponding adjustment of the reaction parameters, in particular the molar ratio of carboxylic acid and sulfur trioxide and the reaction temperature, it is possible to control the ratio of compounds (a), (C) and (D). Compounds (C) and (D) are described below in the section "preferred embodiments".

In the present invention, preference is given to technical-grade mixtures of α -sulfofatty acid disalts having the following composition:

the content of (A) is in the range of from 60 to 100% by weight, preferably in the range of from 70 to 85% by weight,

the content of (C) is in the range of 0 to 20% by weight, preferably in the range of 5 to 15% by weight,

the content of (D) is in the range of from 0 to 20% by weight, preferably in the range of from 10 to 15% by weight,

with the proviso that the sum of components (A), (C) and (D) in this mixture is 100% by weight.

Compound (B)

The function of compound (B) in aqueous surfactant compositions is based on its conditioning and conditioning effect for liquid and solid compositions and its filling and shaping properties for solid compositions.

The liquid aqueous composition typically comprises from 0.1 to 10 wt% of polysaccharide, preferably from 0.2 to 5%, more preferably from 1 to 3 wt% of polysaccharide, based on the weight of the composition.

The solid composition typically comprises from 1 to 60 wt% of polysaccharide, preferably from 5 to 50%, more preferably from 15 to 40 wt% of polysaccharide, based on the weight of the composition.

For solid surfactant compositions, compound B is a filler. The function of the filler is to enable the surfactant to be used in solid form, to strengthen the composition, to increase the abrasion rate, firmness and sensory feel of the composition, and to reduce costs without compromising the lathering performance of the anionic surfactant.

Preferred fillers for solid surfactant compositions are polysaccharide powders, such as dextrins and derivatives thereof, starches and derivatives thereof, celluloses and derivatives thereof.

The compound (B), referred to as polysaccharide in the present invention, is selected from dextrin and derivatives thereof, starch and derivatives thereof, cellulose and derivatives thereof, at least one of which is essential for the surfactant composition according to the present invention.

Starch and derivatives thereof

Starch

The binder/filler component may be untreated starch or modified powdered hydrolyzed starch or derivatives. In solid compositions, this should be present in an amount of about 5% to about 20% by weight, preferably in an amount of about 7% to about 12% by weight.

Starch derivatives used in food production and cosmetics, such as oxidized starch, mono-starch phosphate, di-starch phosphate, phosphorylated di-starch phosphate, acetylated starch, acetylated di-starch adipate, hydroxypropyl starch, hydroxypropyl di-starch phosphate are also possible fillers and binders.

Particular preference is given to using unsubstituted potato starch, wheat starch and/or corn starch, which can be used in untreated form or preferably in digested, i.e. partially hydrolyzed form.

Cellulose and derivatives thereof

In the food industry and in cosmetics, cellulose ethers are most commonly used as thickeners, and in addition to this function they also serve as fillers and binders.

Suitable cellulose derivatives are, for example, cellulose ethers. Cellulose ethers are made by substituting the hydrogen atoms on the hydroxyl groups of cellulose with alkyl and/or arylalkyl groups, which may be further substituted with nonionic, anionic, cationic or nonionic groups. The alkyl group is typically a straight or branched chain C1-C8 alkyl group. Preferred alkyl groups are C1-C4 alkyl groups, examples being methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl or tert-butyl. The alkyl group may be substituted with an aryl group to form an arylalkyl group, for example with a phenyl group. One preferred arylalkyl group is benzyl. The alkyl or arylalkyl groups may be functionally substituted with, for example, hydroxyl, carboxyl, or carboxylate groups. When carboxylate groups are present, corresponding counterions are also present, examples being alkali metal ions, such as sodium or potassium or ammonium ions. It is also possible to use mixed cellulose ethers which contain more than one type of alkyl, arylalkyl or functionally substituted alkyl group.

Preferred hydrophilic polymeric cellulose derivatives are methyl-, ethyl-, propyl-, carboxymethyl-, hydroxyethyl-, hydroxypropyl-, hydroxypropylmethyl-, ethylmethylcellulose-, methylhydroxyethyl-, methylhydroxybutyl-, ethylhydroxyethyl-and/or carboxymethylhydroxyethylcellulose. Among the carboxymethylcellulose, sodium carboxymethylcellulose, croscarmellose sodium or enzymatically hydrolyzed carboxymethylcellulose are included.

Dextrin and derivatives thereof

Dextrins and their derivatives include dextrins, maltodextrins, and cyclodextrins. The most preferred compound (B) is dextrin in the present invention. They have the formula (II) mentioned above

Wherein n-average degree of polymerization-is an integer between 3 and 200, preferably between 5 and 100, most preferably between 10 and 40.

Dextrins are a class of low molecular weight carbohydrates obtainable by hydrolysis of starch, starting with an α - (1 → 6) glycosidic bond to form D-glucose units linked by an α - (1 → 4) linkage.

They preferably have a glucose equivalent of between 1 and 30%, preferably between 1 and 13%, based on dextrose (glucose) having a glucose equivalent of 100%. The Dextrose Equivalent (DE) is a measure of the amount of reducing sugars present in the sugar product, expressed as a percentage on a dry basis relative to dextrose. The dextrose equivalent gives an indication of the average Degree of Polymerization (DP) of the starch sugar, which is inversely proportional to the molecular weight. The Degree of Polymerization (DP) is an indicator of the degree of hydrolysis, unhydrolyzed starch has a DE of 0, and glucose has a DE value of 100.

These polysaccharides are made from starch using enzymes such as amylase or by dry heating (pyrolysis or baking) under acidic conditions. The industrial production of dextrins is usually carried out by acidic hydrolysis of potato starch.

Refined dextrins are very fine powders of various colors, from pure white to brown. Three main types of dextrins are distinguished according to their molecular weight and colour: white dextrin, burnt lime or yellow dextrin, and British dextrin (British gum). British dextrin is the dextrin with the highest molecular weight, an average degree of polymerisation of about 20 and strong mucilaginous properties, yellow dextrin having the lowest molecular weight, and white dextrin having a molecular weight between the other types. They are often used in adhesives and coatings that come into contact with food.

Although not preferred dextrins, maltodextrins can also be included in the composition as polysaccharides and dextrin derivatives. They consist exclusively of alpha- (1 → 4) -bonded glucose and have an average degree of polymerization of between 10 and 20 and a glucose equivalent of 3 to 20%, preferably 10 to 20%.

The cyclodextrin may be any known cyclodextrin, such as unsubstituted cyclodextrins containing from 6 to 12 glucose monomers, especially α -, β -and γ -cyclodextrins, and/or derivatives thereof, and/or mixtures thereof. Alpha-, beta-and gamma-cyclodextrins contain 6, 7 and 8 glucose monomer units, respectively, arranged in a doughnut-shaped ring. Examples of cyclodextrin derivatives suitable for use in the present invention include methyl β -cyclodextrin, hydroxyethyl β -cyclodextrin and hydroxypropyl β -cyclodextrin of varying degrees of substitution. Water-soluble cyclodextrin derivatives are preferred cyclodextrin derivatives. Preferably at least a major portion of the cyclodextrin is alpha-, beta-and/or gamma-cyclodextrin, more preferably alpha-and beta-cyclodextrin. A particularly preferred cyclodextrin for use in the present invention is beta-cyclodextrin. Mixtures of cyclodextrins are also preferably used.

In the present invention, the amount of dextrin is responsible for improved drying effect, conditioning effect (without compromising the foaming properties of the anionic surfactant) of the aqueous surfactant composition and for processability of the solid surfactant composition.

The liquid aqueous composition typically comprises from 0.1 to 10 wt% dextrin, preferably from 0.2 to 5%, more preferably from 1 to 3 wt% dextrin, based on the weight of the composition. If used for hair cleansing, it has been shown to improve hair drying speed and, depending on its dextrose equivalent, it may improve viscosity build of liquid aqueous compositions.

The solid composition typically comprises from 1 to 60 wt% dextrin, preferably from 5 to 50%, more preferably from 15 to 40%, most preferably from 25 to 35% dextrin, based on the weight of the composition. Dextrins enable the processing of solid compositions containing alpha-sulfofatty acid disalts, which enable the shaping of the solids. By using these solid compositions in hair care compositions, good conditioning is achieved while improving the speed of drying the hair.

Other additives

Solid surfactants and liquid aqueous compositions may contain other additives such as skin moisturizers, for example sodium lactate, glycerin, pyrrolidone carboxylic acid; pH regulator and complexing agent; a colorant; a whitening agent; an essence; salts such as sodium chloride, sodium sulfate, sodium phosphate; antioxidants, antimicrobials and preservatives or stabilizers.

The surfactant composition preferably contains a pH adjusting agent, most preferably citric acid, which is added in an amount of 1 to 10 wt%, preferably 1 to 6 wt%, based on the weight of the composition. In order to achieve good skin tolerance, the pH of a 10 wt% solution of the composition in water has a value of 4 to 7, preferably 4.5 to 6.0.

Description of the preferred embodiments

In one embodiment, the surfactant compositions according to the invention comprise, in addition to compounds (A) and (B), one or more further compounds (C) of the general formula (III)

R⁴COOM³(III)

In formula (III), the radical R⁴Is a straight-chain or branched alkyl or alkenyl radical having from 7 to 19 carbon atoms, R⁴Preference is given to saturated, straight-chain alkyl radicals having from 11 to 15 carbon atoms, where, in connection with the compounds (C), the radicals R⁴The proportion of the compound (C) which is undecyl or tridecyl-based on the total amount of the compound (C) -is greater than 60% by weight of the group M³Selected from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines. Particularly preferred alkanolamines are monoethanolamine, diethanolamine, triethanolamine and monoisopropanolamine.

In one embodiment, the surfactant compositions according to the invention comprise, in addition to the compounds (A), (B), one or more further inorganic sulfates (D) of the general formula (IV)

(M⁴)₂SO₄(IV)

Wherein M is⁴Selected from Li, Na, K, Ca/2, Mg/2, ammonium and alkanolamines.

Group M of Compound (A)¹And M²Group M of Compound (C)³And the group M of the compound (D)⁴May be an alkanolamine. In this respect, monoethanolamine, diethanolamine, triethanolamine and monoisopropanolamine are particularly preferred.

In a preferred embodiment, the surfactant composition according to the invention comprises compounds (a), (B), (C) and (D). Particular preference is given here to M of the compounds (A)¹And M²Selected from H (hydrogen) and Na (sodium).

In one embodiment, the surfactant compositions according to the invention comprise, in addition to compounds (A), (B), one or more further compounds (F) of the formula (VI)

R⁵CH₂-CO-CHR⁶(SO₃M⁶)(VI),

Wherein the radical R⁵And R⁶Means-independently of one another-a straight-chain or branched alkyl radical having from 6 to 18 carbon atoms and a radical M⁶Selected from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium and alkanesAn alcohol amine. Particularly preferred alkanolamines are monoethanolamine, diethanolamine, triethanolamine and monoisopropanolamine.

Use of a composition

Another subject of the invention is the use of the above-mentioned compositions for cosmetic and laundry cleaning products.

With regard to cosmetics (including rinse-off and leave-on compositions for skin care), those which are particularly preferred here are in particular in the form of shampoos, solid surfactant compositions, shower gels, soaps, synthetic detergents (syndet), washing creams, washing bars (washing bars), washing liquors, scrub preparations, bubble baths, oil baths, shower baths (shower baths), soap bars, shaving foams, shaving water, shaving creams, lotions and creams and dental care products (e.g. toothpaste, mouthwash, etc.). Preferably the cosmetic product is a hair care composition such as a shampoo, especially preferred is a solid surfactant composition as a synthetic detergent bar for cleansing the cosmetic product and for use as a hair care composition.

In particular, low pH agents are preferred for cleaning hard surfaces, such as bathroom and toilet cleaners, such as toilet blocks and the like, as well as cleaning and/or fragrancing gels for use in sanitary applications.

Solid surfactant composition

The solid surfactant composition is suitably in various forms such as a bar, a stripe, a bead, a granule, a mat, a needle, a sheet or a flake, depending on their manufacturing method and intended use.

Preferred solid surfactant compositions according to the invention having particularly advantageous skin feel and creamy lather comprise:

30 to 70 wt% of a-sulfofatty acid di-salt (Compound A)

10 to 50% by weight of dextrin (Compound B)

5 to 20% by weight of water

Based on the weight of the solid surfactant composition (wt% active material of the respective compound).

The solid surfactant composition according to the present invention more preferably comprises:

30 to 50% by weight of a-sulfofatty acid di-salt (Compound A)

20 to 40% by weight of dextrin (Compound B)

10 to 15 wt% water

Based on the weight of the solid surfactant composition.

The solid surfactant composition according to the present invention most preferably comprises:

35 to 45% by weight of a-sulfofatty acid di-salt (Compound A)

23 to 35% by weight of dextrin (Compound B)

7 to 15% by weight of water

Based on the weight of the solid surfactant composition.

The most preferred solid surfactant composition according to the invention comprises in particular:

40 to 44% by weight of a-sulfofatty acid di-salt (Compound A)

26 to 30% by weight of dextrin (Compound B)

7 to 15% by weight of water

Based on the weight of the solid surfactant composition.

The solid surfactant composition comprising alpha-sulfofatty acid di-salt, dextrin and water preferably contains a pH adjusting agent, most preferably citric acid, which is added in an amount of 1 to 10 wt. -%, preferably 1 to 6 wt. -%, based on the weight of the composition. The pH of a 10 wt% solution of the composition in water preferably has a value of 4 to 7, preferably 4.5 to 6.0.

The composition may contain other additives such as skin moisturizers, for example sodium lactate, glycerin, pyrrolidone carboxylic acid; pH regulator and complexing agent; a colorant; a whitening agent; an essence; salts such as sodium chloride, sodium sulfate, sodium phosphate; antioxidants, antimicrobials and preservatives or stabilizers.

The process of making the solid surfactant soap bar is comparable to conventional soap production using fatty acid soaps. The ingredients are mixed and may be processed by kneading, grinding, extruding, cutting and plodding into a form suitable for shipping or for application.

Examples

1. The raw materials used are as follows:

α -sulfo fatty acid disalt (a):

texapon SFA powder (BASF SE) technical grade alpha-sulfofatty acid disalts based on natural C12/14-fatty acids; consists of the following components: 79 wt% disodium 2-sulfolaurate, 8 wt% sodium laurate, 11.8 wt% sodium sulfate, and water were added to 100 wt%. The term "laurate" herein means a mixture of base natural fatty acids having a C12/14 weight ratio of 70: 30.

Texapon SFA paste (BASF SE) technical grade alpha-sulfofatty acid disalts based on natural C12/14-fatty acids; consists of the following components: 32.5 wt% disodium 2-sulfolaurate, 4.3 wt% sodium laurate, 4.9 wt% sodium sulfate, and water were added to 100 wt%. The term "laurate" herein means that the mixture of base natural fatty acids has a C12/14 weight ratio of 70: 30.

Dextrin from Haiyan Liuhe Pharmaceutical Industry Co.LTD, Sanlian Village, Yucheng Town, Haiyan county Pharmaceutical grade dextrin, mesh size 120, reducing sugar <0.20 g.

Dehyton PK45(BASF SE) 44 to 46.0 wt% dry residue, INCI cocoamidopropyl betaine;

eumulgin EO33(BASF SE): polyethylene glycol 6000 distearate, INCI: PEG-150 distearate

Plantare 818UP (BASF SE) C8-C16 fatty alcohol glycoside; INCI Cococoglucoside

Ucare JR-400(Dow Chemical):INCI:Polyquaternium-10；

2. Manufacture of solid surfactant soap bars

The preparation of the solid surfactant soap bar comprises the following steps:

production of solid surfactant composition in the form of a bar:

1. citric acid was dissolved in demineralized water.

Texapon SFA powder and polysaccharide powder were first mixed in a ploughshare mixer (L20, Loedige Process Technology, Gebr ü der)Maschinenbau, Paderborn, Germany) at 30RPM for 3-5 minutes. An inert gas (e.g., nitrogen) is used as a shielding gas in the mixer to avoid dust explosion.

3. The citric acid solution was then added to the mixer by feeding with a pressure nozzle at 30RPM for 20-30 minutes. The mixer was then run at 50-100RPM for 20-30 minutes to form a wet paste. The pH of the paste (10 wt% solution in water) after mixing is 5-6.

4. The paste was further mixed in a Mix-Muller (LG, Simpson Technologies, Euskerchen Germany) at 15-30RPM for 20-30 minutes, and then

5. Extrusion was carried out in an extruder (LSRE 75R, Sela Maschinen GmbH, Harbke, Germany) with a 3mm die at an extrusion speed of 3-10RPM to produce SFA slivers.

A second step of producing bars from solid surfactant noodles:

6. bars of agglomerate in form of long bars on a three-roll mill (Weber)&Harbk, Germany) was milled twice to obtain a solid surfactant sheet.

7. Filling solid surfactant sheet into soap bar extruder (Weber)&Sela-Maschinen GmbH, Harbke, Germany) and pressed to obtain solid surfactant bars.

3. Anti-sticking performance test method

The bars were placed in 250 ml beakers containing 250 ml of 22 ℃. + -. 2 ℃ demineralized water (FIG. 1: apparatus for anti-stick performance test method). The soap bar was immersed in water for about 4 cm. The length (a) and width (b) of the bottom surface were measured to calculate the tacky paste surface (a ═ a × b).

After 2 hours of soaking, the bar was removed from the water, any excess water carefully thrown off and weighed (W1).

The slimy paste was then removed by careful scraping with a plastic scraper, and the scraped soap bars were wiped with a paper towel and dried overnight before the final weight was determined (W2).

Calculating the paste property:

percent pasting ═ W2-W0)/W0

W0 ═ bar weight before soaking

W2-bar weight after 2 hours soaking, removing slimes and drying overnight

For hair care applications, one of the critical properties is lathering, but sliminess is an additional important property. If the anti-stick value is too low, the bar is too stiff and difficult to apply to hair. If the anti-stick value is too high, the bar is too soft and dissolves easily in water. The optimum percent stick value for the solid surfactant soap bar ranges from 5% to 40%, preferably from 15% to 25%.

4. Foaming test

Scrubbing foaming process

1. The soap bars were milled in an automatic home mill to achieve a particle size of milled powder of 20 to 3000 um.

2. To a 50 ml graduated cylinder, 0.15 g soap powder and 14.85 g water were added and gently shaken to disperse uniformly for 1 minute.

The tube brush was placed in a graduated cylinder and brushed vertically 30 wheels inside the graduated cylinder to form a foam.

3. The brush was removed from the cylinder and the foam height read.

5. Drying speed test

Hair drying test procedure

1. Hair strand preparation

Standard tresses of hair from IHIP, Chinese hair, 15cm/2g, were taped and glued on top. Cleansing and bleaching hair strands.

2. Weighing the hair

3. The hair was rinsed at 38 ℃ for 1 minute at a water flow of 1L/min and combed once with the broadside. Excess water was then removed 3 times with the middle and index fingers. The wet hair was weighed (keeping the initial water gain at 75% of the dry hair weight).

4. The tresses were spread on special trays, treated with a certain amount of product and brushed evenly for 30 seconds on each side, then incubated for a total time of 3 minutes.

5. To wash out, the hair was washed for another 1 minute at 38 ℃ at a water flow rate of 1L/min, and the excess water was removed 3 times with the middle and index fingers. The wet hair with product was weighed (keeping the initial water gain at 75% of the dry hair weight).

For the leave-on product, step 5 is omitted and the process proceeds directly to step 6.

6. The hair was transferred to a blow-dry device and blow-dried until <0.05g increments.

7. After blow drying for 1, 3 and 5 minutes, the tresses were combed with the broadside.

8. The hair weight was recorded every minute.

6. Examples Using solid surfactant compositions

To compare different fillers used in solid bars, the bars were investigated for sliminess and lathering properties.

These bars have been used for shampooing to test the drying performance of hair after cleansing.

Stearic acid has been used as a standard filler for solid soap bars as compared to dextrin.

TABLE 1 comparison of solid surfactant bar composition with bars comprising conventional soap (alkali metal salt of fatty acid)

With respect to foaming properties, stickiness and hair drying speed

TABLE 2 hair drying Rate of commercial soap bar compositions for use as hair cleansing compositions

7. Test for evaluation group

A panel of 11 trained volunteers (9 female chinese, 2 male chinese) tested commercially available solid surfactant bars (Olaz Bar: INCI: sodium stearate, sodium cocoyl isethionate, paraffin, water, sodium cocoyl glyceryl ether sulfonate, glycerol, sodium stearate, talc, stearic acid, sodium cocoate, coconut acid (coconut derived), sodium isethionate, sodium chloride, titanium dioxide, citric acid, perfume, PEG-90M) and solid surfactant compositions according to the invention (sample: S10 of table 3). All 11 panelists used one soap bar of the control product and one soap bar of the product of the present invention. For the lather test, the panelists lather the soap bar, describe the nature of the lather, and then rinse it off. For skin testing, panelists rubbed the wet soap bar on their forearms for 20 seconds, rinsed and dried. The test was carried out in an air-conditioned room at a temperature of 22 ℃ and a relative humidity of 50%. The results are depicted in fig. 2 (results of panel testing).