JPH02258900A - Microencapsulated aromatic for use in granular detergent composition - Google Patents

Abstract

PURPOSE: To provide the objective capsule containing an aromatic-containing liquid core and a solid thin polymer shell and coated with a water insoluble cationic fabric softener and discharging an effective amt. of an aromatic to a fabric to be washed.

CONSTITUTION: The objective microcapsule is obtained by coating a microcapsule (A) containing an aromatic-containing liquid core (i) and a solid thin polymer shell (ii) having an average thickness of 0.1-50 μm and formed by composite coacervation of polycationic and polyanionic substances to perfectly surround the core with a water insoluble cationic fabric softener (B) having an m.p. of 40-150°C so that the wt. ratio of the components A, B is A:B=3:1-50:1.

COPYRIGHT: (C)1990,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD This invention relates to certain coated fragrance-containing microcapsules that, when used in granular laundry detergent compositions, effectively release fragrance to fabrics during home laundering operations. The fragrance-containing microcapsules are coated with a water-insoluble cationic fabric softener that promotes adhesion of the capsules to the fabric in a pre-soak bath or washing machine. The capsules then release the fragrance by diffusion through the capsule walls and destruction of the capsules during handling of the fabric.

BACKGROUND OF THE INVENTION The release of fragrances, particularly volatile and nonsubstantial fragrances, to fabrics during laundering operations is difficult. Surfactants remove substances (dirt) from fabrics.
It is commonly used during pre-soaking and cleaning steps to remove. Co-deposition of fragrances onto fabrics therefore proves to be troublesome.

Furthermore, retention of fragrances, especially volatile and non-permanent fragrances, on the fabric during the drying process is also difficult.

Treatment of fabrics with microcapsules is known (e.g., U.S. Pat. No. 3,870,542 to Ida et al., issued March 11, 1975;
(see U.S. Pat. No. 3,632,296 to Pandcl I et al., issued May 4, 1999), such conventional fabric treatments require large numbers of microcapsules to exhibit effective capsule release. Usually requires the use of

19. Schilling issued on November 18, 1980 (S
U.S. Patent No. 4,234,6 for chJ I l 1ng)
No. 27 and U.S. Pat. No. 4,145.1 to Brain et al., issued March 20, 1979.
No. 84 discloses a granular composition containing frangible microcapsules containing a conditioning agent, such as a fragrance, for releasing the conditioning agent into the fabric mass during the pre-soaking/washing stage of a home laundry operation. .

Despite these disclosures, there continues to be a need for improved compositions that can more effectively release fragrance into fabrics.

Therefore, the purpose of the present invention is to pre-soak granules? An object of the present invention is to provide improved fragrance-containing microcapsules that, when used in M/washing detergent compositions, release an effective amount of fragrance to fabrics being laundered.

Another object of the present invention is to provide an improved method for releasing fragrance to fabrics during the pre-soak or wash stage of the laundering process.

It has surprisingly been discovered that the above objects may be achieved by utilizing a special type of fragrance-containing microcapsules coated with a water-insoluble cationic fabric softener.

SUMMARY OF THE INVENTION The present invention relates to microcapsules having an average size of from about 5 to about 500 microns, each microcapsule comprising: (1) a fragrance-containing liquid core; and (2) a solid source polymer completely surrounding said core. The microcapsules consist essentially of a shell (the shell has an average thickness of 0.1 to 50 microns and the membrane is formed by complex coacervation of polycationic and polyanionic materials); Approximately 40 to 1
It is coated with a substantially water-insoluble cationic fabric softener having a melting point of 50<0>C, with a weight ratio of microcapsules to cationic fabric softener of about 3:1 to about 50:1.

The present invention provides about 0.1 to 20% by weight of coated fragrance-containing microcapsules as described above and about 5 to 99% by weight of a detergent adjuvant selected from the group consisting of water-soluble detersive surfactants, detergent builders and mixtures thereof. It also relates to a granular laundry detergent composition comprising:

Additionally, the present invention relates to a method of treating fabric with a composition as described above.

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the domestic laundry application of granular detergent compositions containing fragrance microcapsules coated with water-insoluble cationic fabric softeners to fabrics.

Cationic fabric softeners promote adhesion of capsules to fabrics in pre-soak baths or washing machines. The capsule then releases the fragrance by diffusion through the capsule wall and handling of the treated fabric such as to rupture the capsule. Without wishing to be bound by theory, it is believed that the cationic softener is complexed with a portion of the anionic polymer in the capsule wall to enhance the diffusivity of the fragrance during the fabric washing process when the capsule is rehydrated in the wash liquor. become The result is improved release of fragrance into the fabric during the washing and/or drying stages as desired.

Microcapsules Microcapsules useful in the present invention have a liquid core containing one or more fragrances, a thin polymeric shell formed by complex coacervation of polycationic and polyanionic materials, and completely surrounding the liquid core. including. By encapsulating the fragrance (in liquid form), the fragrance is protected during the manufacture, distribution and storage of the granular detergent composition and is thus preserved for most effective application to fabrics during laundering operations. Ru. The fragrance is actually applied to the fabric by diffusion through the capsule wall or when the microcapsules are broken during fabric handling. This can occur either during the automatic washing or drying steps of a home laundry operation, or it can actually occur after the fabrics have been laundered and while they are being used.

The fragrance that can be used in the liquid core of the microcapsules can be any water-insoluble (or substantially water-insoluble) fragrance and is selected according to the formulator's wishes (including water-soluble fragrance components). are difficult to encapsulate using the complex coacervation method described below). - In a membrane sense, such fragrance materials are characterized by a vapor pressure above atmospheric pressure at ambient temperature. The fragrance materials used in the present invention are most commonly liquid at ambient temperatures, but may also be solids, such as the various camphor-like fragrances known in the art. A variety of chemicals are known for use in perfumery, including materials such as aldehydes, ketones, esters, etc. More generally, natural vegetable and animal oils and exudates containing complex mixtures of various chemical components are known for use as fragrance agents, and such materials can also be used in the present invention. The fragrances of the present invention may be relatively simple in their composition, or they may be highly elaborate and complex mixtures of natural and synthetic chemical components, all selected to emit the desired aroma. Good too.

Typical fragrances for this invention include wood/earth bases containing exotic substances such as sandalwood oil, civet, patchouli oil, and the like. The aromatic agent of the present invention may be a rose extract, a violet extract, etc. having a faint floral scent. The fragrances of the present invention can be formulated to emit desirable fruity odors, such as lime, lemon, orange, and the like. In short, any substance that gives off a pleasant or desirable odor
It can be used in liquid microcapsules to emit a desirable fragrance when applied to fabrics.

Preferred fragrances include Jacora Ambre Soto (m
usk awbrette), jacolaketone (厘uu
musk keton), musk t
lbetfne), Jacolaxylol (musk
xylol), aurantlol
), ethylvanillin and mixtures thereof. Examples of such fragrance materials include Ethyl (Moed), published May 7, 1985, which is incorporated herein by reference.
dol) U.S. Pat. No. 4,515,705.

Fragrances are often in liquid form and can be used as the only substance in the microcapsule core. Fragrances that are normally solids can also be used in the microcapsule cores if they are mixed with a liquefying agent such as a solvent.

Any organic solvent can be used to liquefy the normally solid fragrance for use in the microcapsule core, provided that such solvent is chemically compatible with the microcapsule shell material described below. Preferred solvents for use in the present invention are materials such as mineral oil and dodecane.

The shell material surrounding the liquid fragrance-containing core to form the microcapsules may be any suitable polymeric material formed by complex coacervation of polycationic and polyanionic materials.

The shell is substantially impermeable to materials in the liquid core and materials that come into contact with the exterior surface of the shell during storage. It is believed that when the microcapsules are rehydrated with a wash liquor, the pores in the microcapsules widen to allow the fragrance to diffuse during the washing and drying process, thereby improving fragrance release into the fabric.

Polycationic materials suitable for use in forming the polymeric shells of the present invention include materials such as gelatin, poly(vinylpyrrolidone), poly(ethyleneimine), and albumin. Type A gelatin is preferred. Polyanionic materials suitable for forming the polymer shell include:
Materials include gum arabic, poly(ethylene/maleic anhydride), poly(vinyl methylethyl maleic anhydride), polyphosphates, polyacrylates and gelatin. Particular preference is given to polyphosphates, especially sodium hexametaphosphate.

Microcapsules as described above can be produced by any conventional complex coacervation method. Such a method is described in U.S. Pat. No. 2,800,457.
No. 3,190,837; No. 3.317.434; No. 3.341.466; No. 3.533,958;
No. 3,687°865; No. 3,697,437 and No. 3,840,467. All of the above patents are incorporated herein by reference.

The microcapsules have a size of about 5 to 500 microns, preferably about 40 to 250 microns, more preferably about 80 to 1
It should have an average size of 50 microns. Further, the capsules used in the present invention have an average shell thickness of about 0.1 to 50 microns, preferably about 0.4 to 30 microns.

The microcapsules of the present invention are typically fragile in nature. Fragility refers to the property of a microcapsule to break or tear when subjected to direct external pressure or shear forces. The microcapsules used for the purposes of the present invention, while attached to the fabric to be treated therewith, can be used when the capsule-containing fabric is tampled in an automatic washer/dryer or handled by being worn or touched. If it can be destroyed by the forces it encounters, it is “vulnerable.”

It is. Microcapsules made with the shell materials described above will be "fragile" if they fall within the capsule size and shell thickness limits described above.

Cationic Fabric Softener Adhesion of the microcapsules described above to the fabric to be treated with them is facilitated by surrounding the microcapsules with a cationic fabric softener. These are fabric directness (f'
abrlc 5ubstative), about 4
Within the range of 0 to 1450°C, preferably about 49 to 105°C
It is a substantially water-insoluble substance with a melting point within the range of .

The term "substantially water-insoluble" as used herein means water-insolubility of 1% by weight or less at 30°C.

A suitable cationic capsule transfer agent
Hgent, published August 22, 1972, which is incorporated herein by reference.
Any cationic (including imidazolinium) compound described in U.S. Pat. Such materials are well known in the art and include, for example, quaternary ammonium salts having at least one, preferably two, 010" C20 aliphatic alkyl substituents;
an alkylimidazolinium salt with a 25 carbon “chain”;
There are C12-020 alkylpyridinium salts and the like.

Preferred cationic softeners in the present invention include general formula RI
There are quaternary ammonium salts of R2R3R4N+X, where the groups R1, R2, R3 and R4 in the above formula are, for example, alkyl, and X is an anion, such as a halide, methyl sulfate, etc., with chloride and methyl sulfate being preferred. Particularly preferred capsule transfer agents are those where R and R2 are each C"C20 aliphatic alkyl and R and R4 are each C1-C4 alkyl. The aliphatic alkyl groups are mixed, e.g. mixed C14-018 Coconut alkyl and mixed 01B
-C18 tallow alkyl quaternary compounds. Preferably, the alkyl groups R3 and R4 are methyl.

Examples of quaternary ammonium softeners of the present invention include sitaroalkyldimethylammonium methyl sulfate,
These include citaroalkyldimethylammonium chloride, dicoconut alkyldimethylammonium methyl sulfate, and dicoconut alkyldimethylammonium chloride.

The microcapsules have a weight ratio of microcapsules to softener of about 50:1 to 3:1, preferably about 20:1.
The fabric softener is coated to be within the range of 1 to 4:1, more preferably about 10:1 to 5:1.

Preferably, the fabric softener completely surrounds or coats the individual microcapsules. This is usually accomplished by thoroughly mixing the microcapsules with the softener in some form of liquid medium and then drying to solidify the coating. Preferred for commercial scale operations, any conventional coating technique can be used, including spray coating or fluidized bed coating techniques.

Cationic fabric softener coatings are described in U.S. Pat. No. 4,234,6 to Schilling, which is incorporated herein by reference.
A trace amount (e.g., 50%) by weight as described in Specification No.
(preferably 20% or less) may optionally contain a nonionic capsule transfer agent.

Granular detergent composition The granular laundry detergent presoak and/or cleaning composition of the present invention comprises:
About 0.1 to about 20% by weight, preferably about 0.3 to about 1
0%, more preferably about 0.5 to about 5% of the coated fragrance-containing microcapsules. Such compositions consist of from about 5 to about 99%, preferably from about 10 to about 90%, and more preferably from about 20 to about 80% by weight of water-soluble detersive surfactants, detergent builders, and mixtures thereof. It also contains detergent adjuvants selected from the group.

The water-soluble surfactants used in the presoak/clean detergent compositions of the present invention may be any of the conventional anionic, nonionic, amphoteric and zwitterionic detergent surfactants well known in the detergent industry. good. Mixtures of surfactants can also be used in the present invention. More particularly, U.S. Pat. Kessler (
The surfactants described in Kessler et al., US Pat. No. 3,332,880, can also be used in the present invention. Non-limiting examples of surfactants suitable for use in the present compositions are as follows.

Water-soluble salts of higher fatty acids, or "soaps", are useful anionic surfactants in the present compositions. These include alkali metal soaps such as sodium, potassium, ammonium and alkylolammonium salts of higher fatty acids having from about 8 to about 24 carbon atoms, preferably from about 12 to about 18 carbon atoms. Soaps are also produced by direct saponification of fats and oils or by neutralization of free fatty acids. Particularly useful are the sodium and potassium salts of fatty acid mixtures obtained from coconut oil and tallow, ie, sodium or potassium tallow and coconut soap.

Useful anionic surfactants include water-soluble salts of a-organic sulfuric acid reaction products having in their molecular structure an alkyl group of about 10 to about 20 carbon atoms and a sulfonic acid or sulfuric acid ester group, preferably alkali metal, ammonium and alkylol ammonium salts (the term "alkyl" also includes the alkyl portion of an acyl group). Examples of this group of synthetic surfactants are sodium and potassium alkyl sulfates, especially higher alcohols (C8-C
18 carbon atoms) by treating with sulfuric acid; the alkyl group has about 9 to 9 carbon atoms in a linear or branched configuration
Sodium and potassium alkylbenzene sulfonates having a molecular weight of about 15, such as compounds of the type described in U.S. Pat. The average number of carbon atoms in the alkyl group is approximately 1
Particularly useful are linear straight chain alkylbenzene sulfonates ranging from 1 to about 13 and abbreviated as C1□-C13LAS.

Other anionic surfactants of the invention include sodium alkyl glyceryl ether sulfonates, especially ethers of higher alcohols obtained from tallow and coconut oil; coconut oil fatty acid monoglyceride sulfonic acids and sodium sulfate; from about 1 to about 10. '+1 position/molecule of ethylene oxide and the alkyl group has about 8 to about 12 carbon atoms, sodium or potassium salt of alkylphenol ethylene oxide ether sulfate; and has about 1 to about 10 units/molecule of ethylene oxide and the alkyl group is a sodium or potassium salt of an alkyl ethylene oxide ether sulfate having from about 10 to about 20 carbon atoms.

Other anionic surfactants useful in the present invention include water-soluble salts of esters of α-sulfonated fatty acids having 6 to 20 carbon atoms in the fatty acid group and 1 to 10 carbon atoms in the ester group; Water-soluble salts of 2-acyloxyalkane-1-sulfonic acids having 2 to 9 carbon atoms in the acyl group and about 9 to about 23 carbon atoms in the alkane moiety: olefins and paraffin sulfonates having 12 to 20 carbon atoms. water-soluble salts; β-alkyloxyalkanesulfonates having 1 to 3 carbon atoms in the alkyl group and 8 to 20 carbon atoms in the alkane moiety.

Water-soluble nonionic surfactants are also useful in the compositions of the present invention. Examples of such nonionic substances include compounds produced by condensation of an alkylene oxide group (woodophilic in nature) and an organic hydrophobic compound that is aliphatic or alkyl aromatic in nature. The chain length of the polyoxyalkylene group fused with any particular hydrophobic group can be easily adjusted to obtain a water-soluble compound with the desired balance between hydrophilic and hydrophobic elements.

Suitable nonionic surfactants include polyethylene oxide condensates of alkylphenols, such as alkylphenols in either linear or branched configurations having alkyl groups of from 6 to 15 carbon atoms and from about 3 to 12 moles per mole of alkylphenol. There are condensation products with ethylene oxide.

Preferred nonionic surfactants are water-soluble and water-dispersible condensation products of aliphatic alcohols having from 8 to 22 carbon atoms, either in linear or branched configuration, and from 3 to 12 moles of ethylene oxide per mole of alcohol. be. Particularly preferred are condensation products of alcohols having alkyl groups of 9 to 15 carbon atoms and about 4 to 8 moles of ethylene oxide per mole of alcohol.

As a semipolar nonionic surfactant, Carbon Hara Reservation 10
a water-soluble amine oxide having one alkyl moiety of ~18 carbon atoms and two moieties selected from the group of alkyl and hydroxyalkyl moieties of about 1 to about 3 carbon atoms; Carbon source reservation 1-3
a water-soluble phosphine oxyto having two moieties selected from the group consisting of an alkyl group and a hydroxyalkyl group; one alkyl moiety with a carbon atom of 10 to 18 and alkyl and hydroxyalkyl moieties with a carbon atom of 1 to 3; There are water-soluble sulfoxides having a moiety selected from the group consisting of:

Amphoteric surfactants include those in which the aliphatic moiety is linear or branched, one aliphatic substituent has a carbon atom of 8 to 18, and at least one aliphatic substituent carries an anionic water-soluble group. There are aliphatic derivatives of heterocyclic secondary and tertiary amines.

Zipolar surfactants include derivatives of aliphatic, quaternary ammonium, phosphonium and sulfonium compounds in which one aliphatic substituent has a carbon radical reservation of 8 to 18.

When the present granular detergent composition is used as a presoak or wash additive composition with other commercially available laundry detergent products, the detersive surfactant component will normally be about 0 to 20% by weight in the composition, preferably about 1 to 20% by weight. It is 10% by weight. When the composition is used as the only detergent product in a laundry process, the detersive surfactant component usually represents about 5% to about 75%, preferably about 10% to 40% by weight of the composition.

In addition to detergent surfactants, detergent builders can be used in the final granular detergent product. Water-soluble inorganic or alkaline electrolytes are suitable builders. Although the builder may be a water-insoluble calcium ion exchange material, non-limiting examples of suitable water-soluble inorganic detergent builders include alkali metal salts of carbonic acid, boric acid, phosphoric acid, bicarbonate, and silicic acid. Examples of such salts include the sodium and potassium salts of tetraboric acid, bicarbonate, carbonic acid, orthophosphoric acid, birophosphoric acid, tripolyphosphoric acid, and metaphosphoric acid.

Examples of suitable machine alkaline cleaning builders include (1)
Water-soluble aminocarboxylate and aminopolyacetate salts, such as nitrilotriacetate, glycinate, ethylenediamine, tetraacetate, N-(2-hydroxyethyl)nitrilodiacetate and dielenetriaminebentaacetate: (2) Water-soluble salts of phytic acid , such as sodium and potassium phytate; (3) water-soluble polyphosphonates, such as the sodium, potassium and lithium salts of ethane-1-hydroxy-1゜1-diphosphonic acid; the sodium, potassium and lithium salts of ethylenediphosphonic acid, etc. (4) Water-soluble polycarboxylic acid salts, such as lactic acid, succinic acid, malonic acid, maleic acid, citric acid,
Carboxymethyloxysuccinic acid, 2-oxa-1,1
, 3-propanetricarboxylic acid, 1. 1. 2. 2
- salts of ethanetetracarboxylic acid, mellitic acid and pyromellitic acid; (5) aqueous soluble as disclosed in U.S. Pat. There is polyacetal.

Other types of detergent builder materials useful in finished granular detergent products include water-soluble ones that can form water-insoluble reaction products with hydraulic cations, preferably with vine crystal seeds that provide growth sites for reaction products. There is a substance. like this"
Seed Builder' compositions are disclosed in detail in British Patent No. 1.424,406.

Another class of detergent builder materials useful in the present invention are insoluble sodium aluminosilicates, particularly those having the formula described in Belgian Patent No. 814.874, issued November 12, 1974; Na-(A10)-(SiO2)y
XH20 where 2 and y are integers of at least 6 and the molar ratio of 2 to y is in the range of 1.0:1 to about 0.5:1; is an integer; the aluminosilicate has a calcium ion exchange capacity of at least 200@g equim/g and at least about 2 grains (
grain) / gallon / s! It has a calcium ion exchange rate of n/g. A preferred material is Zeolite A of the following formula: Na1°-(
SiO2A102) 1227H20 When the present granular detergent composition is used as a pre-soak or wash additive composition with other commercially available laundry detergent products, the detergent builder ingredients will normally be about 20 to 90% ffi in the composition, preferably about 30% by weight. ~
It is 75% by weight. When the granular composition is used as the only detergent product in a laundry process, the detergent builder component will normally represent from about 10 to about 75%, preferably from about 20 to 50%, by weight of the composition.

Optional detergent composition ingredients include enzymes (e.g. proteases and amylases), bleaches and bleach activators, soil release agents (e.g. methylcellulose),
Stain suspending agents (F!4, eg sodium carboxymethylcellulose), fabric brighteners, enzyme stabilizers, color speckles, foam boosters or foam inhibitors, rust inhibitors, pigments. , fillers, fungicides, pH regulators, non-builder alkali sources, etc.

Example 1 The granular laundry detergent composition of the present invention is as follows.

Ingredients Weight% Sodium C13 linear alkylbenzene sulfonate
8.5014-15 Sodium alkyl sulfate
8.4 Sodium tripolyphosphate
39.4 Sodium carbonate
12.3 Sodium silicate (1,
6 ratio) 5.6 water
7.0 Coated fragrance microcapsules
0.9 Sodium sulfate & Others Balance Total ff 1100 The above granular detergent composition is produced by mixing the various ingredients (other than the microcapsules) in a crutcher and then spray drying according to a conventional method.

Coated air freshener microcapsules are manufactured as follows: A 67/33 (depending on the amount of jif) fragrance/light mineral oil (viscosity 125/135) mixture is heated to about 60° C. in a temperature-controlled water bath. Approximately Log type A gelatin per 100 g of fragrance/mineral oil is dissolved in 250 ml of distilled water with stirring at 250 revolutions per minute (rpm). Air freshener/mineral oil 100g
Approximately 0.5-1.0g of sodium hexametaphosphate per serving
is dissolved in distilled water to a concentration of 5% by weight. The dissolved gelatin solution was stirred using a 5cm high-shear stirrer blade model RP1.
515 at 600 rpm. Add the fragrance/mineral oil mixture dropwise to the gelatin solution over 10-15 minutes;
Form an emulsion with a particle size of 75-250 microns.

Add 200ml of water at 60℃ and increase the stirring speed to 250℃.
Reduce to rpm. The pH of the mixture was adjusted to 4.9 with glacial acetic acid.
Adjust to 2. Remove the heating element of the water bath and allow the mixture to cool for 6-24 hours. When the oil droplets are completely covered with the gelatin layer, the reaction solution is cooled to 1-2° C. with external water. The mixture is maintained at that temperature for 10-30 minutes. At this point 4 ml of 25% glutaraldehyde is added to crosslink the gelatin capsule walls. The mixture is then stirred and warmed to room temperature over 6-24 hours. Thyroid (sylo)
id) Approximately 4 g of filter is added to the mixture after the reaction with glutaraldehyde has finished. The mixture is then filtered to separate the capsules. Wash the capsule with water 2I,
Remove residual glutaraldehyde. The capsules are then spread out on a vapor towel to dry. (Drying is
If 100 g or more of the sample is used, a fluidized bed dryer can also be used. ) The capsules are then screened to remove capsules and residual layers larger than about 250 microns in size. The residual capsules have an average size of about 100-150 microns and an average shell thickness of 0.1-50 microns.

10ml of methylene chloride per 10g of capsules
and Shitalou dimethylammonium chloride (DTDM
AC) Add to a methylene chloride solution containing DTDMAC in a proportion of 2 g. Methylene chloride is removed from the mixture with a stream of nitrogen. Gently warm the coating solution in a steam bath;
Facilitates solvent removal. The obtained capsules were DTDMA
Coat evenly with a thin layer (approximately 20-50 microns) of C. (For even larger samples, a Worcester Coatcr or any suitable fluidized bed device should be used to ensure uniform flow of the microcapsules after the total proportion of A to obtain uniform flow of the capsules in the system.) The microcapsules are then mixed with spray-dried detergent ingredients to form the final detergent composition.

When the composition is used in a washing machine to wash fabrics,
The coated fragrance-containing microcapsules effectively release fragrance to the fabric during the washing and drying process and subsequent fabric handling.

Other compositions of the invention are such that the fragrance microcapsules are initially prepared using a 50150 (by weight) air freshener/light mineral oil mixture or 100% fragrance (no K oil) or by replacing sodium hexametaphosphate with gum arabic. Obtained when manufactured by

Other compositions of the present invention are characterized in that the DTDMAC used to coat the microcapsules is replaced with a 3:1 mixture by weight of DTDMAC and tallow alcohol, or the sodium tripolyphosphate in the detergent composition is replaced with hydrated sodium zeolite. Weight ratio of A and sodium carbonate: 3
:1 mixture is used instead.

Example 2 The granular laundry detergent composition of the present invention is as follows.

Ingredients
Weight% 1° Spray-dried detergent base granules: Sodium C13 linear alkylbenzene sulfonate (7
0%)/C14-15 alkyl sodium sulfate (30%
) 1.2.88 Sodium tripolyphosphate 4.56 Tetrasodium birophosphate
17.18 Sodium silicate (1,6 ratio)
7.2Q diethylenetriaminepentaacetic acid 0.38 Brightener 0.
18 Sodium polyacrylate (MW4500)
0°96 polyethylene glycol (nail 8000) 0.29
Mizumoto

Sodium 3,0 Sulfate & Others
Remainder total amount 1002, base granules for spraying: Material C-C alcohol polyethoxylate (6,5)
0.443, mixed with base granules: Sodium carbonate
22.00 Enzyme Savinase
(Novo: I O, 3
7 Sodium perborate hydrate (solid)
3.89 Nonanoyloxybenzenesulfonate 5.26 Coated Fragrance Microcapsules 165° Residual water comes from the mixture.

Hayashi alcohol and monoethoxylated alcohol have been removed.

The above granular detergent composition is manufactured as follows.

Spray-dried detergent base granules are formed by mixing the ingredients of Step 1 in a clarifier and then spray drying according to conventional methods. The nonionic surfactant of step 2 is then sprayed onto the detergent base granules. The resulting product is mixed with the ingredients of Step 3, including the coated fragrance microcapsules prepared in Example 1, to form the final detergent composition.

When the composition is used in a washing machine to wash fabrics,
The coated fragrance-containing microcapsules effectively release fragrance to the fabric during the washing and drying process and subsequent fabric handling.

Claims (1)

Claims: Microcapsules having an average size of 1,5 to 500 microns, each microcapsule comprising: (1) a liquid core containing a fragrance; and (2) a solid thin film completely surrounding said core. a polymeric shell having an average thickness of 0.1 to 50 microns and formed by complex coacervation of polycationic and polyanionic materials; Microcapsules coated with a substantially water-insoluble cationic fabric softener having a melting point of °C, characterized in that the weight ratio of microcapsules to cationic fabric softener is from 3:1 to 50:1. 2. Microcapsules according to claim 1, wherein the microcapsule shell wall material is formed by complex coacervation of type A gelatin and gum arabic or polyphosphate material. 3. The microcapsule according to claim 1, wherein the cationic fabric softener is a C_1_2-C_2_0 dialkyldimethylammonium salt. 4. Microcapsules according to claim 3, wherein the weight ratio of microcapsules to cationic fabric softener is from 4:1 to 20:1, preferably from 5:1 to 10:1. Microcapsules according to any one of claims 1 to 4, having an average size of 5,80 to 150 microns. 6. A granular laundry detergent composition comprising 5 to 99% by weight of a detergent adjuvant selected from the group consisting of water-soluble detersive surfactants, detergent builders, and mixtures thereof, wherein the composition has a particle diameter of 5 to 500 microns. 0.1 to 20% by weight of fragrance microcapsules having an average size, each microcapsule comprising: (1) a fragrance-containing liquid core; and (2) a solid thin polymer shell completely surrounding said core. has an average thickness of 0.1 to 50 microns and the shell is formed by complex coacervation of polycationic and polyanionic materials);
A composition coated with a substantially water-insoluble cationic fabric softener having a melting point of 0°C, characterized in that the weight ratio of microcapsules to cationic fabric softener is from 3:1 to 50:1. . 7. The microcapsule shell wall material is formed by a composite coacervation of type A gelatin and gum arabic or polyphosphate material, and the cationic fabric softener is a C_1_2-C_2_0 dialkyldimethylammonium salt, and the microcapsule vs. cation 7. The composition of claim 6, wherein the weight ratio of fabric softener is from 20:1 to 4:1. 8. The composition of claim 6, comprising 20 to 80% by weight of detergent adjuvant. 9. The composition of claim 8, comprising 10-40% by weight of detersive surfactant and 20-50% by weight of detersive builder. 10. A method for treating fabric, comprising contacting the fabric with a washing liquid containing an effective amount of the composition according to claim 6.