HU191007B - Process for perfuming soaps - Google Patents

Abstract

The aim of the invention is the stabilization of the perfume composition in soaps during d. Storage by reducing the volatility and by increasing the resistance to chemical changes. The goal is achieved by using a polymer in the perfume emulsion component on d. Basis of hydrocarbons and their derivatives, alcohols and their esters and organic acids and their derivatives or a polymer having a heterogeneous chain consisting of nitrogen or copolymers and terpolymers and their mixtures, in 2 to 40% by mass dissolved. This liquid mixture is added to the soap mass in an amount of 0.3 to 6.0 mass%.

Description

The present invention relates to a method for perfuming soaps, in particular skin care soaps. The process of the invention is based on reducing the volatility of the fragrance and increasing its chemical resistance; the stabilized fragrance component will not evaporate during storage of the soap.

Methods known so far for perfuming soaps are based on adding liquid perfume compositions to the soap mass; the soap mass typically contains the sodium salt of longer chain fatty acids, various additives, optionally surfactants, water and coloring agents. Before mixing or homogenizing the soap mass, the perfume is added either separately or together with other additives. The disadvantage of such processes is that the fragrances are diffused from the finished soap into the environment and consequently the perfume content of the soap is significantly reduced during storage. This decrease is evident in more volatile perfume compositions after a few weeks, with 20% of the original perfume content disappearing within the first four weeks. Even with less volatile perfume compositions, it is true that after a longer period of time, such as six months, the original perfume content can be reduced by up to 30%. The disadvantage of the known processes is that the use properties of the manufactured product - in this case, its fragrance - deteriorate in a relatively short period of time. This is especially disadvantageous if the soap is stored for a long time before being sold or used for any reason.

Therefore, attempts have been made to stabilize fragrances, for example by adding an additional additive, usually in the form of a powdered sorbent. U.S. Patent No. 837,914 discloses the use of porous hydrated silica for the indicated purpose. Fragrances are adsorbed in the porous material and their volatility is reduced, thus increasing the stability and shelf life of the product. However, it is disadvantageous that the sorption and desorption properties of the sorbent depend on the properties of the material to be roomed, primarily its chemical composition and the nature of the physical and physico-chemical bonds formed during sorbing. Given that the composition of perfume compositions is highly variable, since the most chemically diverse materials can be found in perfumes, the use of each sorbent can only be limited. A practical disadvantage of the process is that not all soap production lines are capable of automatically adding powdered components; machines are generally suitable for adding liquid perfume components. It is also disadvantageous to add fragrances to the soap mass that already contains sorbent, so that not all fragrances are bound to the sorbent. Also, the soap made according to the method described can observe the disappearance of the fragrance during storage. In particular, soaps containing more volatile perfumes may lose 15-20% by weight of their fragrance content within the first 4 weeks.

No. 4,209,417. The process described in U.S. Pat. In particles of continuous polymeric matrix, the perfume is dispersed using an emulsifier. The resulting scented particles have not only a direct but also a lasting odor. The particles consist of 30 to 70% by weight of water-insoluble perfume, 25 to 65% by weight of water-soluble polymer and emulsifier. A similar solution is disclosed in U.S. Patent No. 1,503,897. See GB Patent Specification. This specification relates to perfume carriers based on carboxymethylcellulose. In both cases, the perfume is stabilized by the use of water-soluble polymeric materials which form a solid gel containing the perfume. However, in order to achieve the desired effect, a relatively large amount of polymer must be used, i.e. a low weight ratio of perfume to polymer (usually 0.5: 1 to 3: 1). Thus, together with the perfume composition stabilized in this way, a relatively large amount of foreign material is introduced into the product which affects the functional properties of the product either negatively or adversely. Otherwise, perfume stabilization is a special operation that makes detergent fragrance more expensive. In addition, the sensitivity of the continuous polymer matrix to water limits the use of the stabilized perfume for perfuming powder detergents, in which the stabilized perfume is not exposed to moisture or mechanical stress. In contrast, moisture and mechanical mixing cannot be excluded when making soap. It should be noted, however, that said GB patent product is not intended for perfuming aqueous detergents or soaps, but that the carboxymethylcellulose-based perfumed carrier is the final product itself; long lasting fragrance air freshener.

The process of the invention overcomes the above-mentioned drawbacks. The process of the present invention for perfuming soaps, in particular body soaps, comprises adding the perfume together with other additives to the processed soap mass. The process according to the present invention is characterized in that it contains polymers or hetero-containing polymers of hydrocarbons or halogenated hydrocarbons or alcohols chain polymers or co- and terpoGmolysates of said monomers, or mixtures thereof, are dissolved or swollen in perfume in an amount of from 2 to 40% by weight of the perfume, and the resulting liquid mixture - 0.3 to 6.0% by weight of the soap - over the soap mass.

The hydrocarbon-based polymer may be, for example, polyethylene, polypropylene or polystyrene with a melting factor of 0.5-5 g / 10 minutes. Examples of halogenated hydrocarbon based polymers are from 20,000 to 210,000 molar palivinyl chloride, while examples of alcohol, ether and ester based polymers are from 6,000 to 320,000 molar polyvinylalcohol, polyphenylene oxide, polyvinyl acetate and polyethylene glycol. Examples of polymers based on organic acids or acid derivatives are polyacrylic acid, polymethacrylic acid, polymethyl methacrylate, polybutyl methacrylate having a molecular weight of 6,000-320,000. Chain polymers of heteroaliphatic compounds include urea formaldehyde resin and melamine formaldehyde resin. Examples of suitable copolymers are vinyl chloride and vinyl acetate of 30,000-160,000 molar butyl butyl methacrylate and methyl methacrylate of 12,000-240,000 molar. Exemplary terpolymerizates are acrylonitrile-butadiene-styrene terpolymerates having a melt index of 5 to 20 g / 10 minutes.

The process of the invention has a fatty acid titer of 36-49 ° C

Suitable for processing soaps from 1? 1 007.

The present invention is based on the discovery that the perfume composition slowly and gradually moisturizes, swells, gels, nearly dissolves, and forms a well-flowing, though internal structure. Perfume is located on the inner structure of the system, making the soap mass compounding at a relatively enclosed, that is, reduce volatility and during storage may prevent removing ^υ POSSIBLE chemical changes, in addition to these advantages, it is also preferred that the method of the invention this can be accomplished with conventional devices available to the dispenser because the liquid additive containing the perfume composition can be well pumped and dispensed. The properties of the liquid additive consisting of perfume and polymer allow the additive to be combined with other additives commonly used in soap making (titanium white, chelating agents, colorants, water, etc.) and added to the soap mass as a liquid mixture. The fragrance component of the perfumed soap according to the invention is stable, the soap does not lose fragrances even after prolonged storage. The product's performance has thus been improved. The effectiveness of the process of the present invention was also quantified with experimental data for the production of soaps containing volatile or less volatile perfumes using the following compounds:

Type fragrance base boiling point, ° C volatile decanol 120 nonanol 102-104 decanol 82-90 nonanal 82-85 citral 143-145 geranyl acetate 143-145 terpinyl acetate 110-112 less volatile diethyl phthalate 298 anisaldehyde 250 linolyl acetate 96 (1.3 kPa) benzyl acetate 323 geranjol 230

O'J

The first group of fragrances containing fragrances is known to lose up to 20% of their perfume content within four weeks. Conventionally produced volatile soaps lost about 60% of their e-40 fragrance content over an 8-month storage period, whereas the 8-month storage for the perfumed soaps of the present invention resulted in only a 15-20% loss. In the case of less volatile perfume bases, conventionally perfumed soap lost 25-30% of its perfume over an 8-month storage period, whereas soap produced according to the invention only lost

It was 8-14%.

The process of the present invention allows up to 50% savings in fragrance components, but nevertheless the aroma intensity of the soap being prepared is even better than that of the conventionally perfumed soap, while improving shelf life. A further advantageous effect of the process according to the invention is that the perfume polymer mixture can reduce the fatty acid titre of the soap mass by up to 4; this improves the workability of the mass and the homogeneity of the soap, due to the fact that the polymers used as stabilizers also have plasticizing properties. This also allows the processing of relatively low quality high fatty soap masses (fatty acid titres above 45-47 ° C are already considered unsuitable for processing and soap properties). The said plasticizing effect also has a beneficial role in suppressing crack formation.

The effect on crack formation was confirmed by the following laboratory experiments. The sample soaps were repeatedly exposed in the laboratory to effects that would persist during normal use of the soap. The soap surface was visually evaluated on a scale of scales developed as standard for each type of soap. The minimum resistance of the soap to crack formation is 2 (the surface of the soap remains unchanged during the test) and the maximum value is 10 (the soap is crumbled). The fragrance soaps containing the stabilized fragrance according to the invention had an average crack resistance of 1 to 2 points better than the conventional Scented Soaps.

The following examples further illustrate the process of the invention.

Example 1

95,995% by weight soap (43,2 ° C fatty acid content, 79% by weight)

0.2% by weight of titanium white

0.8% carboxymethylcellulose

1.0% water

0.005% w / w coloring agent

3.0% w / v fragrance premix

In the mixer for the conventionally made soap mass, the additives of the above formula and the perfume premix are mixed at 20 ° C. The fragrance mixture is prepared by immersing in a highly volatile perfume containing geranyl acetate, terpinyl acetate and decanol a acrylonitrile-butadiene-styrene terpolymer having a melting factor of 16 g / 10 min. The resulting colloidal solution has a viscosity of 0.92 pa.mp.

After homogenization, the mass was processed in the usual manner. The soap obtained after pressing is completely homogeneous across the cross-section, is also plastic, has excellent washing properties and retains its scent until fully used. The perfume content of the soap was practically unchanged after two months of storage, with a loss of only 15% after 8 months of storage.

As a result of the addition of the perfume premix, the fatty acid titer was reduced to 40.8 ° C, which resulted in an improvement in the plasticity of the soap. The easier to process mass increased the production capacity. The resistance of the soap to crack formation was also improved by the scoring scale of the polymerized soap on the above-described point scale to 3.2, while the soap on the same formulation but without the stabilized fragrance had a score of 4.4.

Example 2

Body soap was prepared as described in Example 1, except that the perfume premix was prepared with 140,000 molar vinyl chloride-vinyl acetate copolymerate, perfume polymer = 1.0.25 by weight. The fragrance premix has a viscosity of 1.06 Pamp. The soap obtained has the same stability and other properties as in Example 1. During the 8 months of storage, the soap lost 17% of its original perfume content.

Example 3

In a continuous apparatus suitable for producing body soap, a soap mass is prepared. To the mass of 46.8 ° C fatty acid containing 80% fatty acid, a perfume premix was prepared as follows: less volatile perfume containing linolyl acetate, anisaldehyde, benzyl acetate and geraniol, and acrylonitrile butyl having a melting factor of 16 g / 10 min. 10.12% by weight of a styrene terpolymerizate was added to which was added 2.5% by weight of titanium white, 1.5% by weight of sodium nitrile triacetic acid and 36% by weight of water. The suspension thus obtained has a viscosity of 0.57 Pa.mp. The suspension is added to the mass in a weight ratio of 2:98. The properties of the soap made by homogenizing and pressing the soap mass are the same as those of Example 1. After eight months of storage, the loss of fragrances was 8%.

After the addition of the polymer, the fatty acid titer was reduced to 42 ° C. This reduction made it possible to homogenize and process the initially unusually high fatty acid mass. The tendency to crack was 4.1, compared to 5.3 for the same recipe but no stabilized perfume. The evaluation method was the same as above.

Example 4

The procedure described in Example 3 was followed, except that the polyvinyl acetate (120,000 molar) was used as the polymer component of the perfume premix in an amount of 0.20 parts by weight per perfume. The suspension has a viscosity of 0.70 Pajnp. The properties of the soap are the same as those of Example 3, except for the loss of perfume during the eight months of storage, which in this case was only 7%.

Example 5 The procedure of Example 1 was followed except that the polystyrene was 180,000 molar polymers and the less volatile perfume was used as a fragrance. The suspension obtained had a viscosity of 2.74 Pa / p and a polymer content of 0.285 g / l. The properties of the soap correspond to those of Example 1. The volatility of the fragrance after 8 months of storage was 2 to 2.5 times less than that of similar soap without polymer.

Claims (8)

CLAIMS 1. A process for perfuming soaps by the addition of fragrances, fragrances, and additives to the soap mass, characterized in that the perfume comprises polymers of hydrocarbons or halogenated hydrocarbons or polymers of organic acids or acid derivatives, Soybean terpolymerizates of the listed monomers or mixtures thereof are soaked and swollen in an amount of from 2 to 40% by weight and the resulting mixture is added to the soap mass in an amount of from 3 to 6.0% by weight of the total soap. 2. A process according to claim 1 wherein the polymer is polyethylene, polypropylene or polystyrene having a melting factor of 0.5-5 g / 10 min. 3. A process according to claim 1 wherein the polymer is polyvinyl chloride having a molecular weight of 20,000-210,000. 4. The process of claim 1 wherein the polymer is polyvinyl alcohol of 6,000-320,000 molar weight, pdiphenylene oxide, polyvinyl acetate, or polyethylene glycol. 5. The process according to claim 1, wherein the polymer is polyacrylic acid, palimethylacrylic acid, pdimethyl methacrylic acid or pdibutyl methacrylate having a molecular weight of 6000-320,000. 6. A process according to claim 1 wherein the polymer is a linear urea form aldehyde resin or a melamine formaldehyde resin. The process according to claim 1, wherein the copolymer resin is 30,000-160,000 molar vinyl chloride vinyl acetate copolymer or 12,000-240,000 molar butylmethacrylate methyl methacrylate copolymer and the terpolymerizate has a melting factor of 5-20 g / 10 min, a styrene terpolymer is used. 191 007 8. A method according to any one of claims 1 to 4, characterized by. perfecting a soap mass with a fatty acid titre of 36-49 ° C.