Food-grade coated particles comprising polycarboxylic acids
阅读说明：本技术 含有多元羧酸的食品级包覆颗粒 (Food-grade coated particles comprising polycarboxylic acids ) 是由 J·米雷特·卡塞列尔 C·洛扎诺·佩雷斯 R·塞格雷特·庞斯 于 2018-12-13 设计创作，主要内容包括：本发明涉及一种食品级包覆颗粒,所述颗粒包含：a)含有(C<Sub>4</Sub>-C<Sub>12</Sub>)多元羧酸的核,和b)涂层,所述涂层包含：(i)(C<Sub>4</Sub>-C<Sub>12</Sub>)多元羧酸的碱金属盐,其中所述(C<Sub>4</Sub>-C<Sub>12</Sub>)多元羧酸的至少一个羧酸基团为酸形式,且所述(C<Sub>4</Sub>-C<Sub>12</Sub>)多元羧酸的至少一个羧酸基团为盐形式,和(ii)成膜剂,其中(i)和(ii)的重量比为20:80至40:60。还涉及这些食品级包覆颗粒的制备方法、它们作为食品添加剂的应用以及包含所述食品级包覆颗粒的食品。(The present invention relates to a food-grade coated particle comprising: a) contains (C) 4 ‑C 12 ) A core of a polycarboxylic acid, and b) a coating comprising: (i) (C) 4 ‑C 12 ) Alkali metal salts of polycarboxylic acidsWherein said (C) 4 ‑C 12 ) At least one carboxylic acid group of the polycarboxylic acid being in acid form, and said (C) 4 ‑C 12 ) At least one carboxylic acid group of the polycarboxylic acid is in salt form, and (ii) a film-forming agent, wherein the weight ratio of (i) to (ii) is from 20:80 to 40: 60. It also relates to a process for the preparation of these food-grade coated particles, their use as food additives and food products comprising said food-grade coated particles.)
1. A food-grade coated particle comprising:
a) contains (C)4-C12) A nucleus of a polycarboxylic acid; and
b) a coating, the coating comprising:
(i)(C4-C12) An alkali metal salt of a polycarboxylic acid, wherein said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid being in acid form, and said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid being in salt form, and
(ii) a film-forming agent; wherein
(i) And (ii) in a weight ratio of 20:80 to 40: 60.
2. The food-grade particle of claim 1, wherein (C) of the core4-C12) The polycarboxylic acid is selected from the group consisting of malic acid, citric acid, fumaric acid, tartaric acid, adipic acid, and combinations thereof.
3. Food-grade particle according to any of claims 1 to 2, wherein (C) of the coating is4-C12) The alkali metal salt of a polycarboxylic acid is selected from the group consisting of sodium or potassium hydrogen malate,Sodium or potassium dihydrogen citrate, disodium hydrogen citrate or dipotassium hydrogen citrate, and combinations thereof.
4. Food-grade particles according to any of claims 1 to 3, wherein the film-forming agent is selected from the group consisting of glycerides, polyglycerols (C)4-C28) Fatty ester, sorbitan (C)4-C28) Fatty esters, cellulose ethers, polysaccharides, polyols, natural gums, modified starches, proteins, and combinations thereof.
5. Food-grade particles according to claim 4, wherein the film-forming agent is a monoglyceride.
6. Food-grade particles according to any of claims 1 to 5, wherein the coating is present in an amount of 10 to 40 wt.%, relative to the total particle weight.
7. Food-grade particle according to any one of claims 1 to 6, wherein the coating consists of 20 to 40% of the (C)4-C12) Alkali metal salts of polycarboxylic acids and from 60% to 80% of said film-forming agent, where% are expressed by weight relative to the total coating weight, with the proviso that the sum of the amounts of the ingredients equals 100%.
8. A method of preparing a food-grade coated particle as defined in any one of claims 1 to 7, the method comprising:
a) at a suitable temperature (C)4-C12) An alkali metal salt of a polycarboxylic acid (i) dispersed or dissolved in a film-forming agent (ii), wherein said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid being in acid form, and said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid is in salt form; wherein the weight ratio of (i) to (ii) is from 20:80 to 40: 60; and
b) spraying the dispersion or solution of step a) onto (C)4-C12) On a polycarboxylic acid.
9. The method of claim 8, wherein, in step a), said (C) is4-C12) An alkali metal salt of a polycarboxylic acid is dispersed in a previously melted film former.
10. The method of claim 8, wherein, in step a), said (C) is4-C12) The alkali metal salt of the polycarboxylic acid is in the form of an aqueous solution and emulsified with a pre-melted film former.
11. A method of preparing a food-grade coated particle as defined in any one of claims 1 to 7, the method comprising:
a') spraying a solution of an alkali metal hydroxide onto (C)4-C12) On polycarboxylic acids to form (C)4-C12) A layer of an alkali metal salt of a polycarboxylic acid (i), wherein said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid being in acid form, and said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid is in salt form; and
b ') spraying the film-forming agent (ii) onto the granules of step a') until the weight ratio of (i) to (ii) is from 20:80 to 40: 60.
12. The process according to claim 11, wherein in step b'), the film-forming agent is pre-melted before spraying.
13. Use of a food-grade coated particle as defined in any one of claims 1 to 7 as a food additive.
14. A food, feed product, cosmetic or pharmaceutical product comprising a food-grade coated particle as defined in any one of claims 1 to 7.
15. The food product of claim 14, which is a hard or soft candy or chewing gum.
Technical Field
The present invention relates to food-grade coated particles comprising polycarboxylic acids. The invention also relates to a process for the preparation of said particles, to their use as food additives and to food products comprising said particles.
Background
Polycarboxylic acids such as citric acid, malic acid, tartaric acid and the like are commonly used additives in food. One of the most common areas where these acids are used is in the confectionery industry, including for example hard and soft candies and chewing gums, where it is desirable to rapidly release the polycarboxylic acid to create a strong sour taste sensation.
These hygroscopic acids are deliquescent, and therefore they absorb moisture from the atmosphere. In addition, these polycarboxylic acids, due to their inherent acidic nature, can cause detrimental interactions in some food matrices. For example, when used as acidulants for soft jelly sugars, they can promote sugar conversion reactions and alter jelly stability.
Therefore, different encapsulation techniques have been developed to protect these acids from the environment, overcoming the above-mentioned disadvantages of environmental moisture uptake and unwanted migration in food products.
Protective coatings of fat origin have been widely used to encapsulate these acidulants over the past few years. The hydrophobic character of the fatty coating provides the desired protective barrier against moisture absorption. However, these coatings can lead to a too slow release of the active substance in the aqueous medium, which is undesirable for taste.
European patent EP3127434 describes the use of monoglycerides, diglycerides and combinations thereof as a coating for food components (e.g. organic acids). In general, glycerides yield coatings more elastic than the hydrogenated fats commonly used (palm, sunflower); they are odourless and can be very moisture-proof. However, glycerides may be too soft for certain applications (e.g. the manufacture of confectionery) because they exhibit stickiness during production, making the preparation of the granules difficult. Furthermore, particles coated with glycerides in an amount necessary to ensure a good moisture barrier for the encapsulated acid show a slow release in water, which negatively affects taste.
In another approach, patent US8431171 describes the use of salts (e.g. sodium monohydrogen malate) as protective coating for the active ingredient (food grade acid). However, since layers made from these salts have limited film forming properties, large amounts of salt (at least 50 wt% relative to the total weight of the particles) must be used to form thicker layers to effectively protect the acid in the core from moisture absorption. Thus, the sourness of the encapsulated organic acid may vary depending on the amount of salt used in the coating process. In addition, the inventors have observed that when the particles undergo a tribological process, moderate cracking of the coating containing a large amount of salt occurs. Thus, the granules disclosed in US8431171 are brittle and therefore difficult to handle.
Therefore, according to what is known in the art, there is a need to develop a coating which not only protects the acid from the environment but also allows a rapid release of the active substance and overcomes the problems of the prior art.
Disclosure of Invention
The inventors have found that when a composition containing film formers (e.g., monoglycerides) and (C) in a specific ratio is used4-C12) When a composite coating of a mixture of alkali metal salts of polycarboxylic acids encapsulates a food grade acid, the amount of coating relative to the total amount of particles can be reduced and the resulting particles show increased hardness compared to prior art particles. This increased hardness prevents brittleness and cracking on the one hand and on the other handIs beneficial to the operation in the production and use processes.
Furthermore, as shown in the examples below, the hydrophobicity of the composite coating enables the formation of an encapsulating film around the acid in the core, which acts as a moisture barrier providing good moisture absorption protection, thereby enabling the particles of the invention to exhibit good stability over their shelf life.
In addition to this, the particles of the invention allow a fast release of the encapsulated acid and have the further advantage that the taste of the acid is not altered. This may be of particular interest in applications such as hard/soft candies and chewing gums, where the rapid release of food grade acids should provide a strong and long lasting sour taste sensation.
Accordingly, one aspect of the present invention relates to a food-grade coated particle comprising:
a) contains (C)4-C12) A nucleus of a polycarboxylic acid; and
b) a coating, the coating comprising:
(i)(C4-C12) Alkali metal salt of polycarboxylic acid, wherein said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid being in acid form, and said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid being in salt form, and
(ii) a film-forming agent; wherein
(i) And (ii) in a weight ratio of 20:80 to 40: 60.
The invention also relates to a simple and rapid method for preparing the granules. Accordingly, a second aspect of the invention relates to a process for the preparation of food-grade coated particles as defined above, said process comprising:
a) at a suitable temperature (C)4-C12) An alkali metal salt of a polycarboxylic acid (i) dispersed or dissolved in a film-forming agent (ii); wherein the weight ratio of (i) to (ii) is from 20:80 to 40: 60; and
b) spraying the dispersion or solution of step a) onto (C)4-C12) On a polycarboxylic acid.
A third aspect of the invention relates to a process for the preparation of food-grade coated particles as defined above, said process comprising:
a') spraying a solution of an alkali metal hydroxide onto (C)4-C12) On a polycarboxylic acid to form (C) as defined above4-C12) A layer of an alkali metal salt (i) of a polycarboxylic acid, and
b ') spraying the film-forming agent (ii) onto the granules of step a') until the weight ratio of (i) to (ii) is from 20:80 to 40: 60.
The particles of the invention as defined above may be used for the preparation of food products. Thus, further aspects of the invention relate to the use of the food-grade coated particles as food additives, and to food products comprising the food-grade coated particles and optionally other edible ingredients.
Detailed Description
Unless otherwise indicated, all terms used in the present application should be understood as having the ordinary meaning known in the art. Other more specific definitions for certain terms used in this application are set forth below and are intended to apply throughout the specification and claims.
Unless otherwise indicated, all percentages mentioned herein in relation to the ingredients of the composition are expressed by weight (relative to the total weight of the particles or coating), provided that the sum of the amounts of the ingredients equals 100%.
For purposes of the present invention, the term "about" or "approximately" refers to a numerical range of ± 10% of the specified value. For example, the expression "about 20" or "about 20" includes ± 10% of 20, i.e. 18 to 22.
For the purposes of the present invention, room temperature means 20 ℃ to 25 ℃.
The term "food grade" as used herein means suitable for human or animal consumption, or at least allowed to come into contact with food. The term "edible" as used herein means non-toxic and suitable for consumption.
The particles of the invention are in the form of core-shell microcapsules, i.e. they comprise a core and a coating. For the purposes of the present invention, the terms "encapsulation" and "coating" are used interchangeably and refer to the fact that: comprises (C)4-C12) The core of the polycarboxylic acid is completely surrounded by the coating.
The terms "coating" and "shell" are used interchangeably herein and refer to a layer that covers a core. The term "one-component" coating or shell herein refers to the fact that: the coating or shell comprising only (C)4-C12) Alkali metal salts of polycarboxylic acids or film formers. The term "composite" coating or shell refers herein to the fact that: the coating or shell comprising (C)4-C12) A combination of both an alkali metal salt of a polycarboxylic acid and a film-forming agent.
In a particular embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, the invention relates to food-grade particles consisting of a core and a single coating (i.e. the core is surrounded by only one coating), wherein the composition of the core and the composition of the coating are as defined herein.
In another specific embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, the particles of the invention are substantially circular.
The average particle size as used herein corresponds to D50 (also referred to as Dv (50)), which is the point in the size distribution before (and including) which comprises 50% of the total volume of material in the sample.
In another specific embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, the particles of the invention have an average particle size of 100 to 1000 μm, more specifically 200 to 800 μm, even more specifically 300 to 600 μm.
In the particle of the present invention, the core comprises (C)4-C12) A polycarboxylic acid, the coating comprising (C)4-C12) Alkali metal salts of polycarboxylic acids. The polycarboxylic acid of the core may be the same as or different from the polycarboxylic acid present in the coating in salt form.
For the purposes of the present invention, the term "(C)4-C12) Polycarboxylic acids "are meant to includeAcyclic or cyclic polycarboxylic acids having from 4 to 12 carbon atoms and more than one carboxylic acid group. The polycarboxylic acids may be saturated or unsaturated. (C)4-C12) Examples of polycarboxylic acids include, but are not limited to, succinic acid, itaconic acid, maleic acid, fumaric acid, citric acid, oxalic acid, malic acid, adipic acid, tartaric acid, and the like.
Term "(C)4-C12) The alkali metal salt of a polycarboxylic acid "means (C) as defined above4-C12) An alkali metal salt of a polycarboxylic acid wherein at least one carboxylic acid group is in acid form and at least one carboxylic acid group is in salt form. Examples of alkali metal salts include, without limitation, sodium, potassium, calcium, and combinations thereof.
In a particular embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, (C) is comprised by4-C12) The polycarboxylic acid is selected from the group consisting of succinic acid, itaconic acid, maleic acid, oxalic acid, malic acid, citric acid, fumaric acid, tartaric acid, adipic acid, and combinations thereof; more specifically, selected from the group consisting of malic acid, citric acid, fumaric acid, tartaric acid, adipic acid, and combinations thereof; further more specifically, (C) contained in the core4-C12) The polycarboxylic acid is malic acid.
In another specific embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, the coating comprises (C)4-C12) The alkali metal salt of a polycarboxylic acid is selected from the group consisting of sodium or potassium mono-hydrogen malate, sodium or potassium dihydrogen citrate, disodium hydrogen citrate or dipotassium hydrogen citrate, and combinations thereof. More specifically, the coating comprises (C)4-C12) The alkali metal salt of a polycarboxylic acid is selected from the group consisting of sodium or potassium mono-hydrogen malate.
In another embodiment of the invention, optionally incorporating one or more of the features of the various embodiments described above or below, the polycarboxylic acid of the core is the same as the polycarboxylic acid present in the coating in salt form.
As described above, (C) in the coating4-C12) Polycarboxylic acidsThe weight ratio of the alkali metal salt of the acid (i) to the film-forming agent (ii) is from 20:80 to 40: 60. In a specific embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, the weight ratio of (i) and (ii) in the coating is from 25:75 to 35: 65. In another embodiment, the weight ratio of (i) to (ii) in the coating is 20:80, or 25:75, or 30:70, or 35:65, or 40: 60.
In another specific embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, the coating is made of (C)4-C12) An alkali metal salt of a polycarboxylic acid (i) and a film-forming agent (ii). In a more specific embodiment, (i) and (ii) are present in the coating in amounts of 20 to 40 and 60 to 80 wt.%, respectively, relative to the total coating weight, such that the sum of the wt.% of (i) and (ii) is 100%. In another more specific embodiment, (i) and (ii) are present in the coating in an amount of from 25 to 35 and 65 to 75 weight percent, respectively, relative to the total coating weight, such that the sum of the weight percent of (i) and (ii) is 100% of the coating. In another more specific embodiment, (C)4-C12) The alkali metal salt of a polycarboxylic acid and the film former are present in the coating in amounts of 20 wt.% and 80 wt.%, or 25 wt.% and 75 wt.%, or 30 wt.% and 70 wt.%, or 35 wt.% and 65 wt.%, or 40 wt.% and 60 wt.%, respectively, relative to the total coating weight.
The coating of the particles of the present invention further comprises a film former. The film-forming coating agent is designed to form a continuous and uniform protective film on the surface. The main purpose of the film-forming agent is to help or protect the inner particles from the external environment, or to delay the physical or chemical action that the particles will undergo before release, which is carried out under certain conditions of dissolution or melting of the coating agent.
A coating agent with film-forming ability should be able to produce a uniform and continuous solid layer when the coating is cooled or dried on the surface without the presence of individual crystals. Furthermore, it should be able to reduce or delay at least 50% of the interaction with the environment (e.g., dissolution, moisture absorption, oxidation … …) in time, while requiring very small amounts of coating agent.
Typical film formers include liquid/molten coating materials, or solutions of coating materials in liquids (preferably water) that evaporate during the coating process.
In a particular embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, the film-forming agent has emulsifying properties.
In a specific embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, the film-forming agent is selected from the group consisting of glycerol esters, polyglycerols (C)4-C28) Fatty ester, sorbitol (C)4-C28) Fatty esters, cellulose ethers (including water-soluble cellulose compounds (e.g., hydroxypropylmethyl cellulose, hydroxymethyl cellulose)), polysaccharides (e.g., maltodextrin), polyols (e.g., maltitol, sorbitol), natural gums (e.g., gum arabic, gum acacia), modified starches, proteins (e.g., casein, gelatin), (C)4-C12) Alkali metal salts of polycarboxylic acids (e.g., citric acid, malic acid, sorbic acid, ascorbic acid), alkali metal salts of phosphoric acid, and combinations thereof.
The glyceride or acylglycerol is composed of glycerol and (C)4-C28) The esters of fatty acids can be produced biologically or industrially. For the purposes of the present invention, the term "(C)4-C28) Fatty acids "refer to carboxylic acids having a long aliphatic chain, which is straight or branched, saturated or unsaturated, and contains from 4 to 28 carbon atoms. Examples of fatty acids include, without limitation, stearic acid, cerotic acid, isostearic acid, palmitic acid, oleic acid, linoleic acid, myristic acid, behenic acid, arachidic acid, montanic acid, capric acid, lauric acid, and combinations thereof.
Depending on the number of esterified hydroxyl functions of glycerol, glycerides can be divided into monoglycerides (one hydroxyl function being esterified by one fatty acid molecule), diglycerides (two hydroxyl functions being esterified by two fatty acid molecules) and triglycerides (three hydroxyl functions being esterified by three fatty acid molecules).
Since glycerol contains primary and secondary alcohol groups, different types of monoglycerides and diglycerides can be formed. The monoglyceride may be a 1-monoacylglycerol in which the fatty acid is linked to a primary alcohol, or a 2-monoacylglycerol in which the fatty acid is linked to a secondary alcohol. A diglyceride can be a 1, 2-diacylglycerol, wherein the fatty acid is linked to a secondary alcohol and a primary alcohol, or a 1, 3-diacylglycerol, wherein the fatty acid is linked to a primary alcohol.
Polyglycerol (C)4-C28) Fatty esters are mixed partial esters formed by reacting polymerized glycerol with an edible fat, oil or fatty acid, wherein the fatty acid is as previously defined. Polyglycerol (C)4-C28) The fatty ester may have the formula:
wherein n has an average value of 2 to 20, and each of R1, R2, and R3 is independently a fatty acid moiety or hydrogen. Polyglycerol (C)4-C28) Examples of fatty esters include, without limitation, hexaglycerol myristate, decaglycerol myristate, hexaglycerol oleate, decaglycerol oleate, hexaglycerol laurate, decaglycerol stearate, and the like.
Sorbitan (C)4-C28) Fatty esters (also known as Spans) are esters of sorbitan with fatty acids, wherein the fatty acids are as previously defined. Sorbitan (C)4-C28) Examples of fatty esters include, but are not limited to, sorbitan monolaurate, sorbitan monostearate, sorbitan monooleate, sorbitan monopalmitate, and the like.
Polysaccharides are polymers comprising a backbone consisting essentially of monosaccharide repeating units and/or derivatized monosaccharide repeating units. The polymer may be comprised of long straight to highly branched chains. Examples of polysaccharides include, but are not limited to, starch, modified starch, amylopectin, modified amylopectin, amylose, modified amylose, chitosan, chitin, guar gum, maltodextrin, modified guar gum, locust bean gum, cellulose (a long linear polymer of D-glucose), modified cellulose (e.g., carboxyalkylated cellulose and carboxymethyl cellulose), oxidized polysaccharides, sulfated polysaccharides, cationic polysaccharides, pectin, gum arabic, karaya gum, xanthan gum, carrageenan, agar, and alginate. Polysaccharides are capable of forming structural films. Depending on its structure, the polysaccharide may be soluble or insoluble in water.
In a specific embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, the film-forming agent is selected from the group consisting of glycerol esters, polyglycerols (C)4-C28) Fatty ester, sorbitan (C)4-C28) Fatty esters, polysaccharides, and combinations thereof. More specifically, the film-forming agent is selected from the group consisting of monoglycerides, diglycerides, and polyglycerols (C)4-C28) Fatty ester, sorbitan (C)4-C28) Fatty esters, polysaccharides, and combinations thereof.
In a specific embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, the glyceride is selected from the group consisting of glycerides of stearic acid, cerotic acid, isostearic acid, palmitic acid, oleic acid, linoleic acid, myristic acid, behenic acid, arachidic acid, montanic acid, capric acid, lauric acid and combinations thereof. More specifically, the glyceride is selected from the group consisting of a monoglyceride, a diglyceride, and a combination thereof. More specifically, the glyceride is a monoglyceride, and even more specifically, the monoglyceride is 1-monoacylglycerol. In a specific embodiment of the invention, optionally incorporating one or more features of the various embodiments described above or below, the glyceride is glyceryl monostearate (2, 3-dihydroxypropyl stearate). In another specific embodiment of the invention, optionally incorporating one or more features of the various embodiments described above or below, the glyceride is glycerol distearate, more specifically, (2-hydroxy-3-octadecanoxypropyl) stearate or (3-hydroxy-2-octadecanoxypropyl) stearate.
In a particular embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, the coating is present in the particle in an amount of from 10 to 40% by weight relative to the total particle weight. In a more specific embodiment, optionally in combination with one or more features of the various embodiments described above or below, the coating is present in the particle in an amount of 10 to 30 wt%, more specifically 15 to 25 wt%, relative to the total particle weight.
As mentioned before, the present invention also relates to a process for the preparation of food-grade particles as defined above. There are several ways to obtain a composite shell: (i) dispersing or dissolving an alkali metal salt of a polycarboxylic acid in a film-forming agent; (ii) emulsifying an alkali metal salt of a polycarboxylic acid in a film-forming agent; or (iii) generating alkali metal salt of polycarboxylic acid by in situ neutralization of the core surface, and then spraying film former to fill the pores.
In general, the coating medium used may be a liquid/molten coating material, or a solution of the coating material in a liquid (preferably water) that is volatilized during the coating process.
Accordingly, a method of preparing food-grade coated particles as defined above forms part of the present invention, the method comprising:
a) at a suitable temperature (C)4-C12) An alkali metal salt of a polycarboxylic acid (i) dispersed or dissolved in a film-forming agent (ii), wherein said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid being in acid form, and said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid is in salt form; wherein the weight ratio of (i) to (ii) is from 20:80 to 40: 60; and
b) spraying the dispersion or solution of step a) onto (C)4-C12) On a polycarboxylic acid.
In a particular embodiment of the invention, optionally in combination with one or more features of the various embodiments described above or below, step a) is carried out at a temperature of from 30 ℃ to 100 ℃, more particularly from 30 ℃ to 60 ℃.
In another embodiment, optionally in combination with one or more features of the various embodiments described above or below, (C) in step a)4-C12) Of polycarboxylic acidsThe alkali metal salt is dispersed in the pre-melted film former.
In alternative embodiments, optionally in combination with one or more features of the various embodiments described above or below, in step a), (C) is4-C12) The alkali metal salt of the polycarboxylic acid is in the form of an aqueous solution and is emulsified with a pre-melted film former. Generally, the more concentrated the solution, the better the time treatment.
In another specific embodiment, optionally in combination with one or more features of the various embodiments described above or below, step b) is performed at a temperature of 30 ℃ to 60 ℃, more specifically 35 ℃ to 50 ℃.
In another particular embodiment, optionally in combination with one or more features of the various embodiments described above or below, step b) is carried out at a flow rate of between 5 and 20 g/min per Kg of final product.
In another specific embodiment, optionally in combination with one or more features of the various embodiments described above or below, step b) is performed at a spray pressure of 1.0 to 3.5 bar, more specifically 1.5 to 3.5 bar, even more specifically 2 to 3 bar.
The present invention also relates to a process for the preparation of food-grade coated particles as defined above, said process comprising:
a') spraying a solution of an alkali metal hydroxide onto (C)4-C12) On polycarboxylic acids to form (C)4-C12) A layer of an alkali metal salt of a polycarboxylic acid (i) wherein (C) is4-C12) At least one carboxylic acid group of the polycarboxylic acid being in acid form, and said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid is in salt form; and
b ') spraying the film-forming agent (ii) onto the granules of step a') until the weight ratio of (i) to (ii) is from 20:80 to 40: 60.
In another specific embodiment, optionally in combination with one or more features of the various embodiments described above or below, step a') is performed at a temperature of 30 ℃ to 100 ℃, more particularly 30 ℃ to 60 ℃.
In another particular embodiment, optionally in combination with one or more features of the various embodiments described above or below, step a') is carried out at a flow rate of between 5 and 20 g/min per Kg of final product.
In another specific embodiment, optionally in combination with one or more features of the various embodiments described above or below, step a') is performed at an injection pressure of 1.0 to 3.5 bar, more specifically 1.5 to 3.5 bar, even more specifically 2 to 3 bar.
In another specific embodiment, optionally in combination with one or more features of the various embodiments described above or below, step b') is performed at a temperature of 30 ℃ to 60 ℃, more particularly 35 ℃ to 50 ℃.
In another embodiment, optionally in combination with one or more features of the various embodiments described above or below, in step b') the film former is pre-melted prior to spraying.
In another particular embodiment, optionally in combination with one or more features of the various embodiments described above or below, step b') is carried out at a flow rate of between 5 and 20 g/min per Kg of final product.
In another embodiment, optionally in combination with one or more features of the various embodiments described above or below, step b') is performed at an injection pressure of 1.0 to 3.5 bar, more particularly 1.5 to 3.5 bar, and even more particularly 2 to 3 bar.
The above embodiments relating to the particles of the invention are also applicable to embodiments of the product characterized by the method.
The present invention also relates to food-grade coated particles comprising:
a) contains (C)4-C12) A nucleus of a polycarboxylic acid; and
b) a coating, the coating comprising:
(i)(C4-C12) Alkali metal salt of polycarboxylic acid, wherein said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid being in acid form, and said (C)4-C12) At least one carboxylic acid of a polycarboxylic acidThe radicals being in the salt form, and
(ii) a film-forming agent; wherein
(i) And (ii) in a weight ratio of 20:80 to 40: 60.
The particles may be obtained by a process comprising the steps of:
a) at a suitable temperature (C)4-C12) An alkali metal salt of a polycarboxylic acid (i) dispersed or dissolved in a film-forming agent (ii), wherein said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid being in acid form, and said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid is in salt form; wherein the weight ratio of (i) to (ii) is from 20:80 to 40: 60; and
b) spraying the dispersion or solution of step a) onto (C)4-C12) On a polycarboxylic acid.
The present invention also relates to food-grade coated particles comprising:
a) contains (C)4-C12) A nucleus of a polycarboxylic acid; and
b) a coating, the coating comprising:
(i)(C4-C12) Alkali metal salt of polycarboxylic acid, wherein said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid being in acid form, and said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid being in salt form, and
(ii) a film-forming agent; wherein
(i) And (ii) in a weight ratio of 20:80 to 40: 60.
The particles may be obtained by a process comprising the steps of:
a') spraying a solution of an alkali metal hydroxide onto (C)4-C12) On polycarboxylic acids to form (C)4-C12) A layer of an alkali metal salt of a polycarboxylic acid (i) wherein (C) is4-C12) At least one carboxylic acid group of the polycarboxylic acid being in acid form, and said (C)4-C12) At least one carboxylic acid group of the polycarboxylic acid is in salt form; and
b ') spraying the film-forming agent (ii) onto the granules of step a') until the weight ratio of (i) to (ii) is from 20:80 to 40: 60.
The above embodiments relating to the process for the preparation of the particles and the particles themselves also apply to the embodiments of the product characterized by the process.
The expression "food-grade coated particles obtainable by the process" as used herein to define food-grade coated particles by their method of preparation refers to compositions obtainable by the method of preparation comprising steps a) and b), or i) to iii), or a ') and b') as defined above. For the purposes of the present invention, "obtainable", "obtained" and similar equivalents are used interchangeably and, in any case, the expression "obtainable" includes the expression "obtained".
The granules of the invention can be used for the preparation of different food products. The invention therefore also relates to the use of the food-grade coated particles as defined above as food additive, and to food products comprising the food-grade coated particles as defined above and optionally other edible ingredients.
In a particular embodiment, optionally in combination with one or more features of the various embodiments described above or below, the food product is a confectionery product, more particularly a hard or soft candy or chewing gum.
The granules of the invention can also be used for the preparation of feed products, cosmetics and pharmaceuticals. The invention therefore also relates to feed, cosmetics and pharmaceuticals comprising the food-grade coated particles as defined above.
In the description and claims the word "comprising" and variations thereof does not exclude other technical features, additives, components or steps. Further, the word "comprising" covers the case of "consisting of … …". Additional objects, advantages and features of the invention will become apparent to those skilled in the art upon examination of the description or may be learned by practice of the invention. The following examples are provided by way of illustration and are not intended to limit the present invention. Moreover, the present invention encompasses all possible combinations of the specific and preferred embodiments described herein.
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