RU2762509C1 - Composition for softening fabrics with caring additives - Google Patents

Abstract

FIELD: chemical industry.

SUBSTANCE: invention is aimed at creating a liquid composition with increased stability and viscosity, providing care for fabric and leather made on the basis of natural vegetable raw materials. The claimed composition for softening fabrics and leather care contains the following components, wt. %: triethanolamine ester based on fatty acids of cottonseed oil 8-10, a caring additive: biolipid 2.5-4, cellulase 0.3-0.4, hypoallergenic perfume composition 0.2-0.6, sodium benzoate 0.3-0.6, reverse osmotic water up to 100.

EFFECT: task is achieved by creating a unique combination of biodegradable surfactants, perfumes and preservatives made from natural plant raw materials, as well as the use of eco-friendly additives.

1 cl, 2 tbl

Description

The present invention relates to liquid fabric softening compositions for use in a rinse cycle in automatic washing machines and for hand washing fabrics.

The current trend in the research and development of new fabric conditioner formulations is to create formulations that include ingredients that have beneficial effects on fabric and skin. When analyzing the prior art, fabric conditioner formulations are known that more or less meet these requirements.

A known composition for the care of fabrics containing a polymer-encapsulated ingredient that improves fabric or skin (application for invention RU No. 2006140248, IPC C11D 1/62, publ. 20.05.2008). A fabric softener composition comprising: (a) 0.01 to 50 wt% of a cationic or nonionic softener compound; (b) at least 0.001 wt% water-dispersible crosslinked cationic polymer obtained by polymerizing 5 to 100 mol% cationic vinyl addition monomer, 0 to 95 mol% acrylamide and 5 to 500 ppm bifunctional a crosslinking agent for the vinyl addition monomer; (c) 0 to 5 wt% unbound perfume oil; (d) an effective amount of at least one tissue or skin improving ingredient encapsulated in an organic polymer framework and having a hydroxy-functional polymer on the outside of the framework attached to the framework so as to form a shell at least in part around said framework; moreover, the specified hydroxy-functional polymer is not removed from the framework in water; (f) water up to 100% and, optionally, one or more auxiliary substances.

The disadvantage of this composition for softening fabrics is the presence in the composition of the organic polymers specified in subparagraph (d), mainly of synthetic origin with high cost and low biodegradability in the environment. The fabric or skin enhancing ingredient referred to in subparagraph (d) is selected from the group consisting of fragrances or scented oils, antibacterial additives, vitamins, skin conditioners, UV absorbers and synthetic enzymes that may cause allergic reactions when used.

The closest technical solution to the present invention is a stable composition in a rinse cycle with a co-softener for fabric and skin made of glycerol monostearate (patent RU 2258735, IPC C11D 1/62, publ. 20.08.2005, bull. No. 23). A stable, flowable and water-dispersible liquid fabric softening composition contains: (a) from about 1 to about 25 wt% of a combination of fabric softening components (A) and (B), where (A) is a biodegradable fatty acid ammonium base ester of the formula

where each R4 independently denotes an aliphatic hydrocarbon group containing from 8 to 22 carbon atoms, and (B) denotes glycerol monostearate, and the specified component (A) is from about 1 to about 20 wt.%, and the content of component (B) is from about 0.1 to 8 wt.% Of the composition; (b) an effective amount of an emulsifier comprising a fatty alcoholic ethoxylate nonionic surfactant having a hydrophilic-lipophilic balance (HLB) value greater than about 8.25, as determined by Davies' numerical group method; (c) if necessary, a viscosity regulator other than MgCl ₂ in an amount effective to maintain the viscosity of the composition not higher than about 400 cps; and (d) an aqueous solvent.

However, the specified composition for softening tissues and skin as a product stabilizer contains an emulsifier - fatty ethoxylated alcohol, and as a viscosity regulator - inorganic salts such as sodium chloride, calcium chloride and magnesium sulfate. Synthetic ethoxylated alcohols are known to cause irritation and dermatitis in people with sensitive skin when applied to fabric as part of a conditioner. In addition, the addition of hardness salts as viscosity regulators to fabric conditioners results in increased tissue encrustation with mineral salts. Woven products become more rigid, less hygroscopic, lose their color brightness and are easily damaged by mechanical stress.

The objective of the invention is to create a liquid composition with increased stability and consisting of components that provide tissue and skin care, made on the basis of natural plant materials.

Obtaining an aqueous composition for softening tissues, providing improved softness of the tissues and at the same time increased stability of the product requires properties such as constancy of viscosity over a wide range of temperatures and the absence of phase separation.

The technical result of the proposed solution is achieved due to the inclusion in the composition of a unique combination of biodegradable surfactants, perfume composition and preservative made from natural plant materials, as well as other useful environmentally friendly additives that show high efficiency in the care of fabric and skin, and ensure the constancy of viscosity in wide temperature range in the absence of phase separation.

The task is achieved by the fact that the composition for softening fabrics and skin care includes the following components, wt%:

triethanolamine esterquat based on cottonseed oil fatty acids 8-10 caring supplement - biolipid 2.5-4 cellulase 0.3-0.4 hypoallergenic perfume composition 0.2-0.6 sodium benzoate 0.3-0.6 reverse osmosis water up to 100

The combination of the components included in the composition, taken in the above quantitative ranges, ensures the constancy of the viscosity of the liquid agent in a wide temperature range and the absence of phase separation during storage, and also exhibits high caring properties in relation to tissue and skin. The stability and optimal viscosity of the composition is achieved due to the revealed quantitative combination of the listed components without the additional use of ethoxylated alcohols and mineral salts.

Triethanolamine esterquat based on cottonseed oil fatty acids .

Triethanolamine esterquat (TEAQ) or dialkyl diester hydroxyethyl methyl ammonium methosulfate, CAS No. 91995-81, is used as the main surfactant in the fabric softening composition of the proposed solution. This esterquat is obtained by esterification of triethanolamine with fatty acids of cottonseed (cottonseed) oil, followed by quaternization of the ammonium base with dimethyl sulfate. Cottonseed oil contains stearic, palmitic, oleic, linolenic, flaxseed and other fatty acids. Due to the natural plant origin of unsaturated and saturated acids of linseed oil, triethanolamine esterquat is easily emulsified in aqueous solutions, forming stable solutions, has low toxicity and irritation to the skin, and is also easily biodegradable in the environment (98% in 28 days).

As the triethanolamine esterquat, for example, the following commercial product can be used: SUNQAT from Sunjin beauty science Co., Ltd. This esterquat is a light yellow paste composed of 90 ± 1% dialkyl diester of hydroxyethyl methyl ammonium methosulfate, CAS No. 91995-81; 5 ± 1% ethyl alcohol and 5 ± 1% isopropyl alcohol. The product has an alcoholic smell and the pH of its 5% solution in a water-isopropanol solution 1: 1 (wt.) Is in the range from 2.7-3.3. The freezing / melting point is 14 ° C, the flash point is 30 ° C.

The viscosity and stability of the fabric softening composition is highly dependent on the concentration of the cotton esterquat. Aqueous solutions containing 3-5% esterquats require additional stabilization of the composition using thickeners and emulsifiers. Concentrated compositions containing 12-20% esterquat are very viscous products and inorganic salts are used to liquefy them, such as calcium and magnesium chlorides, magnesium sulfate, etc. In the present invention, the composition uses an optimally defined concentration of cotton esterquat equal to 8-10 % (by product). Under these conditions, the composition does not require additional stabilization with polymers and emulsifiers, and also has a good viscosity and flow profile. In addition, the absence of additional additives in the composition also reduces the raw material cost of the finished product, and also prevents skin irritation when manually rinsing the fabric in a conditioner solution, and when the conditioned and dried fabric contacts the skin.

Caring supplement - biolipid

The inclusion of Plantatex LLE (BASF) biolipid additive in the composition allows to increase fabric softening, since it is a mixture of 10-20% alkyl polyglucosides (APG) of С08-С10 fraction, 10-20% АПГ С10-С16, 32- 35% water, 1-5% citric acid and up to 100% mono- and diesters of glycerol and fatty acids of palm kernel oil.

Plantatex LLE is a specially formulated additive for use in fabric softening and sensitive skin care formulations. The inclusion of this additive in the composition can significantly improve the softness of the fibers of fabrics and increase their absorbency, which is very important when washing clothes for children, delicate fabrics, towels, linen and other woven products. Plantatex LLE is an effective caring supplement due to the presence of lipids in the product that are identical to those of human skin.

In appearance Plantatex LLE is a yellowish paste, well emulsifiable in water. An aqueous solution with a product concentration of 5% has a pH of 3-4. The softening point of Plantatex LLE is 40 ° C, product density 1.06-1.10 g / cm ³ at 20 ° C.

For the manufacture of a fabric softening composition, a Plantatex LLE concentration of 3% is used. This concentration of the conditioning agent in the conditioner is in the 2-5% concentration range and provides stability to the composition after preparation.

Cellulase

The enzyme cellulase is used in the tissue softening composition to improve the tactile sensation and appearance of conditioned cotton fabrics. Cellulase (CAS No. 9012-54-8) belongs to the class of hydrolases and catalyzes the hydrolysis of β (1,4) -glycosidic bonds in cellulose to form glucose or cellobiose disaccharide. When the enzyme interacts with fluffed cotton fibers, they undergo destruction and pass into the conditioning solution in the form of soluble and dispersed particles. As a result of the action of cellulase, cotton fibers become smoother and more pleasant to the touch, the color of fabrics becomes brighter, and pellets disappear from their surface. Cotton fabrics treated with cellulase conditioner are less prone to subsequent stains than untreated fabrics.

In the present invention, an aqueous solution of cellulase of the brand Carezyme® Premium 4500 L from Novozymes was used. Cellulase is produced by fermentation of vegetable agricultural raw materials with microorganisms that are not genetically modified and are not present in Carezyme® Premium 4500 L. The substance is an amber liquid with a weak enzymatic odor and a density of 1.08 g / ml.

For the manufacture of a composition for softening tissues, a commercial form of cellulase Carezyme® Premium 4500 L was used in an amount of 0.3-0.4%. The optimal concentration of another commercial product depends on its enzymatic cellulase activity.

Preservative and perfume composition

Additional components used in fabric softening compositions can be added in minimal amounts. To preserve the functional properties during the entire guaranteed storage period, a preservative, sodium benzoate, was used in the composition.

Sodium benzoate (CAS 532-32-1) has the chemical formula C ₆ H ₅ COONa and is white granules, flakes or crystalline powder, odorless or with a slight benzaldehyde odor. Sodium benzoate has an inhibitory effect on yeast and mold fungi, inhibits the activity of enzymes in microbial cells responsible for redox reactions, as well as enzymes that break down starches and fats. Sodium benzoate is low-toxic and therefore is often used not only in household chemicals and cosmetics, but also in the food industry. The optimum concentration range of sodium benzoate for conservation is 0.3-0.6%. The best performance indicators are achieved in an acidic environment with pH values from 3.8 to 4.5.

To differentiate the composition for softening fabrics on the market of household chemicals, perfume compositions can be used in its composition, selected from the group of aromas: herbaceous, floral, fruity, musky, woody, fancy production of the company Givaudan Suisse SA. The optimal concentration of a natural perfume composition is in the range from 0.2% to 0.6%. At these mass concentrations of the perfume composition, the smell of softened fabrics is not obtrusive, but at the same time fresh and bright enough.

The composition of the present invention was prepared as an aqueous dispersion in which the fabric softening compounds are present in a finely divided state, stably dispersed in the aqueous phase. Typically, the dispersed particles are less than 25 microns in size, which is acceptable for both softening and stabilization, since the particle size can be maintained in actual use, usually in a rinse cycle in automatic washing machines.

The aqueous phase of the dispersion is water, usually reverse osmosis, deionized or distilled water. The regulation of the viscosity and stability of the composition is carried out without additional additives such as inorganic salts, co-solvents, emulsifiers, polymers, etc., but only due to the optimally selected concentration of the components in the composition.

The composition, regardless of whether it is in concentrated or diluted form, should be free flowing at the stage of final consumption. Therefore, generally, the viscosity of the final product (for a freshly prepared sample) should not exceed about 400 cP, but also should not be too low, less than about 50 cP. The preferred viscosity of the composition according to the invention is in the range from 120 to 300 cps. Viscosity is measured at 25 ° C (22-26 ° C) with a Brookfield RVTD digital viscometer using spindle # 2 at 50 rpm.

Table 1 shows examples of compositions

Table 1 Composition A B V G D Component: wt% - triethanolamine esterquat based on cottonseed oil fatty acids 7.0 8.0 9.0 10.0 11.0 - caring supplement - biolipid 2.0 2.5 3.0 4.0 5.0 - cellulase 0.3 0.3 0,4 0,4 0.5 - hypoallergenic perfume composition "Herbs" 0.2 0.3 0,4 0.5 0.6 - sodium benzoate 0.3 0.3 0,4 0.5 0.6 - reverse osmosis water 90.2 88.6 86.8 84.6 82.3

The composition is prepared as follows.

The water is heated to 50 ° C and then the cellulase solution, the Plantatex LLE softener and sodium benzoate are dissolved in the water to obtain the first part of the composition.

In a second vessel, the cotton esterquat is heated to 50 ° C and slowly poured into the first portion for dispersion with constant stirring. Stirring is carried out for about 10 minutes until a homogeneous emulsion is obtained. The resulting emulsion is cooled to 25 ° C, also with stirring. Continuing the mixing process, add a natural perfume composition to the cooled emulsion.

Table 1 contains six softening compositions, and five of them - A, B, C, D and E were obtained in accordance with the described process and one composition, for comparison, is given in patent RU No. 2258735.

To assess the comparative stability of various compositions for softening fabrics - A, B, C, D and E of the present invention, and the composition for comparison according to patent RU No. 2258735, the viscosity of the compositions was measured immediately after preparation, 1 day later and after 6 weeks at storage temperatures 4 ° C; room temperature - 20 ° С; as well as at 35 ° C and 43 ° C.

The viscosity results are shown in Table 2.

table 2 Aging viscosity for softening compositions, cP Storage period Composition Prototype A B V G D Immediately after preparation 73 80 85 204 235 84 After 1 day 77 86 90 220 256 116 After 6 weeks: - at 4 ° С 86 97 104 253 289 176 - at room temperature 90 98 108 258 302 133 - at 35 ° С 92
(bundle) one hundred 111 262 311 165 - at 43 ° С 109
(bundle) 120 132 286 366 250

From table 2 it follows that the compositions B, C and D obtained according to the above method remain stable and have a viscosity below 300 cP, after 6 weeks of aging at 43 ° C. Composition A has acceptable storage viscosity but delaminates. Composition D remains stable, but has too high a viscosity, after 6 weeks aging at 43 ° C. The stability of the compositions for softening tissues - B, C and D according to the present invention is provided due to the mass ratio of the active components included in them without additional additives such as inorganic salts and emulsifiers used for the composition of the prototype. Specific examples provided in this application, and reference to specific options are provided only to illustrate the principles and applications of this invention. Were investigated other options for execution, and additional options for execution, which may be obvious to specialists in this field after reading and understanding this description. All such embodiments are intended to be included within the scope of this invention as well. Therefore, it is understood that numerous modifications can be made to the illustrative embodiments, and that other systems may be devised without departing from the spirit and scope of the invention as defined in the claims.

The composition of the composition for softening fabrics with caring additives has a unique combination of biodegradable surfactants, fragrances and preservatives made from natural plant materials, as well as other useful environmentally friendly additives that have shown high efficiency in fabric and skin care, and at the same time ensure consistent viscosity over a wide range temperatures in the absence of phase separation.

Claims (2)

Composition for softening fabrics with caring additives, including the following components, wt%: triethanolamine esterquat 8-10 based on fatty acids of cottonseed oil caring supplement - biolipid 2.5-4 cellulase 0.3-0.4 hypoallergenic perfume composition 0.2-0.6 sodium benzoate 0.3-0.6 reverse osmosis water up to 100