阅读说明：本技术 一种用于液体洗涤剂的结构化助剂组合物及其制备方法 (Structured assistant composition for liquid detergent and preparation method thereof ) 是由 蔡国强 权琰 何一波 李英豪 凡凡 张蕾 于 2021-08-17 设计创作，主要内容包括：本发明涉及日化领域,本发明公开了一种用于液体洗涤剂的结构化助剂组合物及其制备方法,该结构化助剂组合物包括以下质量百分数的原料：氢化蓖麻油10-25%,表面活性剂15-40%,结晶助剂0.5-3%,稳定剂1-10%,水余量。本发明通过配方优化,用表面活性剂分散增溶氢化蓖麻油分子,并进一步添加结晶助剂和含有环糊精的稳定剂,制备得到的结构化助剂组合物可在常规生产工艺中直接添加到液体洗涤剂组合物中,提高生产效率的同时又赋予产品良好的悬浮稳定效果。(The invention relates to the field of daily chemicals, and discloses a structured assistant composition for a liquid detergent and a preparation method thereof, wherein the structured assistant composition comprises the following raw materials in percentage by mass: 10-25% of hydrogenated castor oil, 15-40% of surfactant, 0.5-3% of crystallization assistant, 1-10% of stabilizer and the balance of water. According to the invention, through formula optimization, hydrogenated castor oil molecules are dispersed and solubilized by using a surfactant, and a crystallization auxiliary agent and a cyclodextrin-containing stabilizer are further added, so that the prepared structural auxiliary agent composition can be directly added into a liquid detergent composition in a conventional production process, the production efficiency is improved, and a good suspension stability effect is also given to the product.)

1. A structured adjunct composition for use in liquid detergents characterized by: the material comprises the following raw materials in percentage by mass:

10 to 25 percent of hydrogenated castor oil,

15 to 40 percent of surfactant,

0.5 to 3 percent of crystallization auxiliary agent,

1-10% of a stabilizer, wherein the stabilizer is a composition of cyclodextrin and modified starch;

the balance of water.

2. The structured aid composition of claim 1, wherein: the cyclodextrin accounts for at least 30% of the total mass of the stabilizer.

3. The structured aid composition of claim 1, wherein: the hydrogenated castor oil is hydroxystearic acid glyceride, and the melting temperature is 70-95 ℃.

4. The structured aid composition of claim 1, wherein: the crystallization auxiliary agent is one or more of fatty glyceride and polyglycerol fatty acid ester.

5. The structured aid composition of claim 1, wherein: the surfactant is one or more of amino acid type surfactant and alkylbenzene sulfonate.

6. The structured aid composition of claim 4, wherein: the amino acid type surfactant is one or more of sodium cocoyl methyl taurate, sodium cocoyl taurate, sodium lauroyl sarcosinate and sodium cocoyl glutamate, and the alkylbenzene sulfonate is C10-C16 linear alkylbenzene sulfonate.

7. The structured aid composition of claim 1, wherein: also contains 0.5-5% of fatty acid.

8. The structured aid composition of claim 7, wherein: the carbon chain length of the fatty acid is C12-C18.

9. A process for the preparation of a structured adjuvant composition according to one of claims 1 to 6, characterized in that it comprises the following steps: adding a surfactant into water according to a ratio, heating to 80-95 ℃, adding hydrogenated castor oil after uniformly stirring, adding a crystallization aid and a stabilizer, continuously stirring for 10-30 minutes, cooling to 60-70 ℃ at a cooling rate of 1-2 ℃/min, preserving heat for 20-40 minutes, and cooling to room temperature.

10. A liquid detergent comprising a structured adjunct composition according to any one of claims 1 to 8, wherein: the liquid detergent is a liquid fabric detergent or a liquid hair detergent.

Technical Field

The invention relates to the field of daily chemicals, in particular to a structured assistant composition for a liquid detergent and a preparation method thereof.

Background

Liquid detergent compositions will contain surfactants and a large amount of functional builders of the emulsion or granular type, depending on the requirements of use. In the liquid detergent composition, the emulsion or particle functional additives float to the surface of the composition or settle to the bottom of the composition over time, which affects the product form and the use experience of the product. Therefore, liquid detergents containing functional aids of emulsion or granule type are required to have suspension stability.

The commonly used structuring auxiliary agent is a polyacrylate polymer, but the structuring auxiliary agent is sensitive to the ionic strength and the pH value of a system and is limited in use range. Hydrogenated castor oil is an excellent external structuring aid which can form crystalline structures under certain conditions, thereby assisting the formation of structured systems in liquid household products, stabilizing liquid detergent compositions and preventing liquid phase separation, and also preventing suspended particles in the system from settling. However, due to the high melting point of hydrogenated castor oil, the dispersion and recrystallization processes are complicated, and the effect of direct addition to liquid detergents may not be desirable. Therefore, the prepared structural auxiliary agent containing the hydrogenated castor oil can be directly added in the conventional production process of the detergent, so that the process difficulty can be greatly reduced, the energy consumption can be saved, the production efficiency can be improved, the suspension stability effect can be ensured, and the product quality can be improved.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides a structured aid composition for liquid detergent and a method for preparing the same. According to the invention, through formula optimization, hydrogenated castor oil molecules are dispersed and solubilized by using a surfactant, and a crystallization auxiliary agent and a cyclodextrin-containing stabilizer are further added, so that the prepared structural auxiliary agent composition can be directly added into a liquid detergent composition in a conventional production process, the production efficiency is improved, and a good suspension stability effect is also given to the product.

The specific technical scheme of the invention is as follows:

in a first aspect, the present invention provides a structured auxiliary composition for liquid detergents, comprising the following raw materials in percentage by mass:

10 to 25 percent of hydrogenated castor oil,

15 to 40 percent of surfactant,

0.5 to 3 percent of crystallization auxiliary agent,

1-10% of a stabilizer, wherein the stabilizer is a composition of cyclodextrin and modified starch;

the balance of water.

Castor oil may comprise glycerides, especially triglycerides, of hydroxyl-containing C10 to C22 alkyl or alkenyl moieties. Hydrogenated castor oil is obtained by subjecting the double bonds in its molecule to a hydrogenation treatment to convert them to saturated hydroxyalkyl moieties. Hydrogenated castor oil is often used as a rheology modifier, and when crystallized in solution into fine fibers, fine wires, spheres, and the like, the hydrogenated castor oil can reduce the interaction force among functional particles, avoid aggregation and flocculation of the particles in a system, and stably suspend functional particles in a liquid product. Hydrogenated castor oil requires a very small size environment in which the formation of fine crystal structures is possible, and if the size of the crystals formed is large, it is costly for hydrogenated castor oil itself, and its suspension stabilizing effect is also impaired. Due to the poor water solubility of hydrogenated castor oil, the process of forming fine crystals in solution is very complicated, and usually needs to be carried out in an environment rich in surfactant, so that the hydrogenated castor oil molecules are solubilized/emulsified by the surfactant, and then fine crystals are formed in the process of cooling. The inventors have found that the addition of a small amount of crystallization aid during the preparation of the structuring aid increases the crystallization efficiency and further increases the amount of crystallization by adding a stabilizer comprising cyclodextrin. The reason for this is probably that the unique hydrophobic cavity structure of cyclodextrin can interact with surfactant or hydrogenated castor oil, and cyclodextrin can participate in the assembly process of surfactant to form self-assembly structures such as linearity and vesicles, thereby improving the crystallization effect of hydrogenated castor oil. After a series of improvements, the structured auxiliary agent composition can be directly added into a detergent composition in a conventional production process, so that the production efficiency is improved, and meanwhile, a good suspension stability effect is given to a product.

Preferably, the cyclodextrin accounts for at least 30% of the total mass of the stabilizer.

In the research process of the invention, the proportion of cyclodextrin in the stabilizer is important, and the cyclodextrin can be combined with glyceride to form an amphiphilic self-assembly body with hydrophilic and hydrophobic segments by utilizing the environment, so that the emulsification assisting effect can be achieved, the oil surface emulsifier arrangement is further improved, the emulsification effect is increased, and a microenvironment is provided for hydrogenated castor oil crystallization. We have found that if the cyclodextrin content is below the critical value of 30%, the final effect may be less than ideal.

Preferably, the hydrogenated castor oil is glyceryl hydroxystearate, such as 12-hydroxystearate triglyceride; the melting temperature of the hydrogenated castor oil is preferably from 70 to 95 ℃.

Preferably, the crystallization aid is one or more of fatty acid glyceride and polyglycerin fatty acid ester.

Preferably, the surfactant is one or more of an amino acid type surfactant and an alkylbenzene sulfonate.

As a further preferred, the amino acid type surfactant is one or more of sodium cocoyl methyl taurate, sodium cocoyl taurate, sodium lauroyl sarcosinate and sodium cocoyl glutamate, and the alkylbenzene sulfonate is linear alkylbenzene sulfonate of C10-C16.

Preferably, the structuring aid composition further comprises 0.5-5% fatty acid.

The carbon chain length of the fatty acid is the same as the chain length of the partial fatty chain on the hydrogenated castor oil, thereby facilitating the crystallization of the grease. That is, the carbon chain length of the crystallization aid is approximately close to that of the grease, and the crystallization aid effect is better.

More preferably, the carbon chain length of the fatty acid is from C12 to C18.

In a second aspect, the present invention provides a method for preparing the above structured aid composition, comprising the steps of: adding a surfactant into water according to a ratio, heating to 80-95 ℃, adding hydrogenated castor oil after uniformly stirring, adding a crystallization aid and a stabilizer, continuously stirring for 10-30 minutes, cooling to 60-70 ℃ at a cooling rate of 1-2 ℃/min, preserving heat for 20-40 minutes, and cooling to room temperature.

In a third aspect, the present invention provides a liquid detergent comprising the structured adjunct composition described above, which is a liquid fabric detergent or a liquid hair detergent.

Preferably, the liquid fabric detergent further comprises: other surfactants, perfumes, enzyme preparations, polymers, opacifiers, salts, brighteners, preservatives, chelating agents, and pigments.

Preferably, the liquid hair detergent further comprises one or more of other surfactants, polymers, silicone oil emulsions, salts, preservatives, chelating agents, anti-dandruff agents, perfumes and pigments.

Compared with the prior art, the invention has the following technical effects: according to the invention, through formula optimization, hydrogenated castor oil molecules are dispersed and solubilized by using a surfactant, and a crystallization auxiliary agent and a cyclodextrin-containing stabilizer are further added, so that the prepared structural auxiliary agent composition can be directly added into a liquid detergent composition in a conventional production process, the production efficiency is improved, and a good suspension stability effect is also given to the product.

Drawings

FIG. 1 is a polarization micrograph of the structured additive compositions prepared in examples 1 and 6 and comparative examples 1 and 2.

Detailed Description

The present invention will be further described with reference to the following examples.

General examples

A structured assistant composition for liquid detergent comprises the following raw materials in percentage by mass:

hydrogenated castor oil (preferably glyceryl hydroxystearate, melting temperature 70-95 deg.C) 10-25%,

a surfactant (preferably amino acid type surfactant and/or alkyl benzene sulfonate, wherein the amino acid type surfactant is one or more of sodium cocoyl methyl taurate, sodium cocoyl taurate, sodium lauroyl sarcosinate and sodium cocoyl glutamate, and the alkyl benzene sulfonate is preferably linear alkyl benzene sulfonate of C10-C16) 15-40%,

0.5-3% of crystallization auxiliary agent (preferably fatty acid glyceride and/or polyglycerol fatty acid ester),

stabilizer (modified starch and cyclodextrin, wherein the cyclodextrin accounts for at least 30%) 1-10%,

0.5-5% of fatty acid with carbon chain length of C12-C18 (selectively added according to the requirement),

the balance of water.

A method of making a structured aid composition comprising the steps of: adding a surfactant into water according to a ratio, heating to 80-95 ℃, adding hydrogenated castor oil after uniformly stirring, adding a crystallization aid and a stabilizer, continuously stirring for 10-30 minutes, cooling to 60-70 ℃ at a cooling rate of 1-2 ℃/min, preserving heat for 20-40 minutes, and cooling to room temperature.

A liquid detergent comprising the structured adjunct composition, said liquid detergent being a liquid fabric detergent or a liquid hair detergent. Optionally, the liquid fabric detergent further comprises: other surfactants, perfumes, enzyme preparations, polymers, opacifiers, salts, brighteners, preservatives, chelating agents, and pigments. The liquid hair detergent also comprises one or more of other surfactants, polymers, silicone oil emulsions, salts, preservatives, chelating agents, anti-dandruff agents, perfumes and pigments.

Detailed description of the preferred embodiments and test experiments

The present invention will be described below with reference to specific examples, but the present invention is not limited thereto. The experimental methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials are commercially available, unless otherwise specified. The invention is not limited to the embodiments described herein, but is capable of numerous modifications and variations within the spirit and scope of the invention.

The structured aid composition is prepared according to the following components in percentage by mass: adding a surfactant into water according to a proportion, heating to 90 ℃, adding hydrogenated castor oil after uniformly stirring, adding a crystallization aid, a stabilizer and fatty acid, stirring for 20 minutes, cooling to 65 ℃ at a cooling rate of 1.5 ℃/min, preserving heat for 30 minutes, and cooling to room temperature.

Comparative examples 1 and 2 are control examples with modified beta-cyclodextrin and modified starch, respectively, relative to examples 1 and 6, to study the effect of varying the stabilizer composition ratio on the performance of a structuring aid composition. The polarization microscope pictures at 200 x magnification after 5 x dilution of the structured additive compositions of examples 1, 6 and comparative examples 1, 2 with deionized water show that:

FIG. 1 from the results of examples l and 6, it can be seen that hydrogenated castor oil can be dispersed and emulsified in a large amount of surfactant system according to the experimental process and cooled to obtain fine crystals, and the prepared structurant composition can be observed to have the existence of crystal structure in the polarizing microscope, which shows that the structurant composition containing hydrogenated castor oil crystals can be prepared according to the compositions and preparation methods of examples 1 and 6, and the composition is milky liquid with certain fluidity and can be conveniently added into liquid detergent. From the results of comparative examples 1-2, it can be seen that comparative example 1 contains no cyclodextrin, and the amount of crystallization is much less than that of example 1, demonstrating that the addition of cyclodextrin can improve the crystallization efficiency; in contrast, in comparative example 2, the content of cyclodextrin was lower than 30% of the mass of the stabilizer, and the size of the crystals was larger than that in example 6. This demonstrates that the cyclodextrin content of the stabilizer is at least 30% or more, which is desirable to improve crystallization efficiency.

Liquid detergent stability investigation method: the detergent is placed in a constant temperature incubator at 52 ℃, the detergent is taken out after a certain time interval to observe the state of the system, and if layering or flocculation occurs, the stability of the system is poor.

The stability in liquid fabric detergents containing structured adjunct compositions was evaluated as described above, and the liquid detergent compositions used were as follows:

formulation of	Comparative example 1	Test example 1	Test example 2	Test example 3	Test example 4
						Fatty alcohol polyoxyethylene ether-9	3	3	3	3	3
Alkyl glycosides	2	2	2	2	2
						Sodium dodecyl benzene sulfonate	6	6	6	6	6
Sodium fatty alcohol Ether sulfate	7	7	7	7	7
						Glutamic acid diacetic acid tetrasodium salt	0.2	0.2	0.2	0.2	0.2
Polyethyleneimine ethoxylate	1	1	1	1	1
						Citric acid sodium salt	1.5	1.5	1.5	1.5	1.5
Protease enzyme	0.1	0.1	0.1	0.1	0.1
						Pigment	0.05	0.05	0.05	0.05	0.05
Essence	0.1	0.1	0.1	0.1	0.1
						Microcapsule essence	0.5	0.5	0.5	0.5	0.5
Preservative	0.1	0.1	0.1	0.1	0.1
						Example 1		2
Comparative example 1			2
						Example 6				0.5
Comparative example 2					0.5
						To be removed from water	Balance of	Balance of	Balance of	Balance of	Balance of
Stability at 52 ℃ for 15d	Delamination occurred	Uniform and stable	Uniform and stable	Uniform and stable	Uniform and stable
						Stability at 52 ℃ for 30d	/	Uniform and stable	Delamination occurred	Uniform and stable	Uniform and stable
Stability at 52 ℃ for 60d	/	/	/	Uniform and stable	Delamination occurred

From the above results, it can be seen that: test examples 1-4 of liquid detergents to which the structured builder composition prepared in example 1/6 or comparative example 1/2 was added all had better stability at high temperature than control example 1 without the structured builder composition, enabling system-suspended microcapsules; from the results of the comparison between test examples 1-2 and 3-4, the samples with cyclodextrin added during the preparation of the structured aid composition have better suspension stability, especially with a cyclodextrin content of more than 30% of the stabilizer.

The stability in liquid hair detergents containing structured adjunct compositions was evaluated as described above and the liquid hair detergents used consisted of:

from the above results, it can be seen that: test columns 5-8 of liquid hair detergents with the addition of structured adjuvant composition prepared in example 1/6 or comparative example 1/2 all had better stability at high temperature than control 2 without the addition of structured adjuvant composition, enabling the achievement of a system suspending silicone oil emulsion and zinc pyrithione; in comparison, the composition added with cyclodextrin in the preparation process has better suspension stabilization effect, and especially, the composition added with cyclodextrin accounts for more than 30% of the stabilizer.