ES2212008T3 - SOFTENING COMPOSITION OF FABRICS. - Google Patents

Abstract

A SOFTENING FABRIC COMPOSITION WITH GOOD STORAGE STABILITY AND EXCELLENT STABILITY OF PERFUME IS DESCRIBED. THE COMPOSITION CONTAINS A CATIONIC SOFTENING AGENT AND A PERFUME / CARRIER SUBSTANCE WITH A SLIP POINT BELOW 45 (GRADES) C.

Description

Fabric softening composition.

The present invention relates to compositions fabric softeners, in particular the invention relates to aqueous dispersions of biodegradable softener compositions of tissues comprising a water insoluble cationic agent fabric softener and perfume. The compositions are stable in storage and show an excellent contribution of perfume when taken out of a washing machine.

Fabric softener compositions added when rinsing are well known. Typically such compositions contain a water-insoluble quaternary ammonium agent of tissues, dispersed in water at a level of softening agent of up to 7% by weight in the case of the compositions considered diluted, or at levels of 7% to 50% in the case of the compositions They are considered concentrated. The softening compositions of Desirable tissues, in addition to softness, have other benefits such as the contribution of perfume in the tissues.

The fabric conditioner market is getting moving towards more concentrated compositions. One of the problems associated with such fabric softening compositions is that in Storage are physically unstable. This problem is accentuated by the presence of a perfume; the higher the level worse perfume becomes the problem of stability.

Physical instability manifests itself with a thickening in storage of the compositions up to a level where the composition is no longer liquid and can even lead to The formation of a gel. Thickening is very undesirable since the Composition can no longer be conveniently used.

In the past the physical stability of fabric softening compositions added to the rinse has been enhanced by the addition of viscosity control agents or anti-gelling agents. For example, in the EP13780 (Procter and Gamble) control agents are added from viscosity to certain concentrated compositions. The agents they can include C 10 -C 18 fatty alcohols. More recently, document EP280550 (Unilever) has proposed to improve the physical stability of physical compositions that they comprise quaternary ammonium compounds bound to ester, biodegradable, and fatty acids by the addition of non-surfactants ionic EP507478 (Unilever) describes a composition fabric softener, physically stable comprising compounds ester-bound quaternary ammoniums, biodegradable and an agent non-ionic stabilizer

With concentrated compositions comprising ester bound quaternary ammonium compounds, biodegradable on problem of physical instability is more acute than with traditional quaternary ammonium compounds.

Document CA1111616 (Procter and Gamble) describes a fabric softener composition comprising 0.1 to 10% by weight of a cationic fabric softener and 0.1% by weight at 20% by weight of particles. The particles are comprised of a carrier substance and a perfume that has a melting point of 38 ° C to 150 ° C, preferably 65 ° C to 100 ° C.

It has been found that the compositions fabric softeners comprising ammonium compounds Quaternaries show an excellent substantivity of perfume and a Good storage stability.

Thus, according to one aspect of the invention, provides a liquid fabric softener composition that understands:

i)

an ammonium agent fabric softening quaternary,

ii)

from 0.1% by weight to 10% by weight of a perfume / carrier substance mixture having a slip point below 37 ° C at which the agent quaternary ammonium fabric softener is fine

one

where each group R_ {1} is selected independently of the alkyl, or hydroxyalkyl groups or C 2-4 alkenyl; and where each R2 is independently selected from the alkyl groups C_ {8-28} or alkenyl;

\uelm{O}{\uelm{\dpara}{O}}

- o -

\uelm{C}{\uelm{\dpara}{O}}

-O-; yT is -

 \ uelm {O} {\ uelm {\ dpara} {O}} 

- or -

 \ uelm {C} {\ uelm {\ dpara} {O}} 

-OR-; Y

n is an integer from 0-5; or

two

where R1, n and R2 are as defined previously, and also the proportion of perfume to substance carrier is from 1:50 to 1: 1.

The sliding point of the mixture perfume / carrier substance is measured as defined by the standard British BS 684 section 1.3 1991 ISO 6321: 1991 (UK).

A further aspect of the invention is provided by a process to prepare a softening composition of tissues as defined above, comprising the following stages:

i)

formation of a aqueous dispersion of the softening quaternary ammonium agent of tissues;

ii)

addition of perfume / carrier substance dispersion mixture resulting.

An advantage of this process is that it is simple. An additional advantage allowed by the present invention is that the Fabric softener grade can be varied to meet the requirements of different consumers in different markets, while maintaining the high contribution of perfume.

The invention also allows the perfume to be Built-in without excessive product perfume intensity diluted.

To give an excellent perfume contribution when the wash is taken out of the washing machine, the substance perfume mixture carrier has a slip point below 37 ° C, preferably from 0 to 37 ° C. More preferably between 20 ° C and 37 ° C

The compositions of the invention are liquid, more preferably they comprise an aqueous base.

It is preferred that the carrier substance be a organic material. It is further preferred that the carrier substance be a fatty ester of a mono or polyvalent alcohol having from one to approximately 24 carbon atoms in the hydrocarbon chain with the condition that the total number of carbon atoms in the carrier substance is equal to or greater than 16 and that at least one of the hydrocarbon radicals in the ester have 12 or more atoms of carbon. Such odorless fatty esters are preferred.

It is preferred that the carrier substance in the perfume / carrier substance mixture is a fatty acid glyceride or mixtures of fatty acid glycerides. Triglycerides are especially preferred carrier substances, the most preferred They are palm oil and tallow oil.

The perfume / carrier substance mixture is preferably present at a level of 1 to 10% of the composition, more preferably 3% by weight to 7% by weight of the composition total.

For a good perfume contribution, the proportion of perfume to carrier substance is 1:50 to 1: 1, more preferably 1:20 to 1: 2, most preferably 1: 7 to 1: 2.

To get a good contribution of perfume from product is favorable than the mixing ratio perfume / carrier substance to the softening quaternary ammonium agent of tissues is in the range 5: 1 to 1:10, more preferably 2: 1 at 1:10.

A preferred type of quaternary ammonium agent ester bound, fabric softener, for use in the compositions according to the invention it can be represented by the formula:

3

where each group R_ {1} is selected independently of C 1-4 alkyl groups, or hydroxyalkyl or C 2-4 alkyl; and where each group R2 is independently selected from alkyl groups C_ {8-28} or alkenyl;

\uelm{O}{\uelm{\dpara}{O}}

-C- o -

\uelm{C}{\uelm{\dpara}{O}}

-O-; yT is -

 \ uelm {O} {\ uelm {\ dpara} {O}} 

-C- or -

 \ uelm {C} {\ uelm {\ dpara} {O}} 

-OR-; Y

n is an integer from 0-5; or by the formula:

4

where R_ {1}, n and R2 are as defined previously.

Preferred materials of this class and their preparation method are described, for example, in the document US4137180 (Lever Brothers). Preferably these materials they comprise small amounts of the corresponding monoester as described in US 4137180, for example chloride 1-seboyloxy, 2-hydroxytrimethylammonium propane.

Preferably the level of ammonium compounds quaternaries bound to ester is at least 1% by weight of the composition, more preferably more than 7% by weight of the composition; Especially interesting are the compositions concentrates comprising between 10 and 30% by weight of the compound quaternary ammonium bound to ester.

The compositions of the invention may also contain non-ionic stabilizers. Suitable non-ionic stabilizers that can be used include the condensation products of primary linear alcohols
C 8 -C 22 with 10 to 25 moles of ethylene oxide. The use of less than 10 moles of ethylene oxide, especially when the alkyl chain is in the sebum range, leads to unacceptably high aquatic toxicity. In particular, the following non-ionic stabilizers are preferred: Genapol T-110, Genapol T-150, Genapol T-200, Genapol
C-200 all from Hoechst AG, Lutensol AT18 from BASF, Genapol C-100 and Genapol C-150 from Hoechst, or fatty alcohols such as Laurex CS, from Albright and Wilson or Adol 340 from Sherex (all trademarks). Preferably the non-ionic stabilizer has an HLB value of 10 to 20, more preferably 12 to 20. Preferably, the level of non-ionic stabilizer is in the range of 0.1 to 10% by weight, more preferably 0.5 to 5 % by weight, most preferably 1 to 4% by weight.

The composition may also contain acids fatty, for example alkyl monocarboxylic acids C 8-24 or alkenyl, or carboxylic acids polymeric Saturated fatty acids are preferably used, in particular, hardened tallow fatty acids C_ {16} -C_ {18}.

The level of fatty acid material is preferably greater than 0.1% by weight, more preferably greater than 0.2% by weight. Especially preferred are concentrates that comprise from 0.5 to 20% by weight of fatty acid, more preferably 1% to 10% by weight. The proportion by weight of the ammonium material Quaternary to fatty acid material is preferably 10: 1 to 1:10

The compositions of the invention have preferably a pH of more than 1.5, more preferably less than 5.

The composition may also contain one or more optional ingredients, selected from non-aqueous solvents, pH buffering agents, fluorescents, dyes, hydrotopes, antifoaming agents, anti-redeposition agents, enzymes, optical stirring agents, opacifiers, agents anti-shrink agents anti-wrinkle, anti-stain agents, germicides, fungicides, anti-oxidants, agents anti-corrosion, fall conferring agents, agents anti-static and ironing assistants.

The composition may also contain non-agents. ionic fabric softeners.

The invention will now be illustrated by means of following non-limiting examples. In the examples all percentages are expressed by weight.

Comparative examples are designated with letters, while the examples of the invention are designated by numbers.

Examples 1, 2, 3, 4, A, B, C and D.

The compositions were prepared by the following method:

Antifoam, preservative and dye dissolved in warm water (40 ° C) followed by the addition of an electrolyte (citric or CaCl2) to form an aqueous solution. The agent biodegradable cationic fabric softener (HT TMAPC = chloride 1-trimethyl ammonium-2,3-bis [seboyloxy (hardened)] propane with some tallow fatty acid impurities (6: 1 ratio) of Hoechst) melted (75-80 ° C) and It was mixed with the non-ionic (coconut ethoxylate 20EO: coconut 20). Was added this premix to the resulting aqueous solution for 5 min with agitation. The resulting mixture was recirculated through a Janke and Kunkel grinder set at maximum shear (10,000 rpm). This recirculation / shear continued for 30 minutes after of the premix addition. The perfume was directly stirred in the mixture or premix with palm oil / tallow at a temperature from 40-45ºC and then added by grind the product for a period of 10 minutes at 8000 rpm

(Palm / tallow starting materials are refined, bleached and deodorized).

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TABLE 1

5

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TABLE 2

6

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The viscosity measurements were taken at 25 ° C and at a shear rate of 106 s -1, using a VT501 rotoviscometer.

Examples A and B became solid at 3 days at 37 ° C storage. Examples 1 and 2 showed the Viscosities that follow:

TABLE 3

8

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Examples C and D became solid at 3 hours at room temperature. Examples 3 and 4 showed the Viscosities that follow:

TABLE 4

9

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Examples 5, 6, 7, 8, E, F, G, Y H

To demonstrate that this invention works with a variety of perfumes, 300 g of a non-base were prepared scented (at 35 cP) of composition 4 with perfume alone or with perfume blend / palm oil by grinding to the base using a Silverson mixer for a period of 5 minutes. The samples are They left at room temperature.

TABLE 5

10

Examples 9, 10 e I

Examples were prepared by dispersing the agent cationic fabric softener in water, followed by the addition of perfume or perfume / carrier substance mixture.

The substantivity of the perfume was measured by adding 1 g of the resulting composition at 1 liter of water at temperature stirring environment for 2 minutes to disperse. Four 19x19 squares of terry plush were dipped in the dispersion and left for 5 minutes. Next, he removed the plush from curl of the dispersion, and drained and laid during the night.

The terry plush samples were evaluated by a panel of people using a random design to measure the power of the fragrance.

Each treatment was evaluated six times. The data were analyzed by analysis of variance.

TABLE 6

12

The contribution of perfume on the terry plush was As illustrated in the table below:

TABLE 7

13

A score of 0 indicates that there is no impact of fragrance.

A score of 5 indicates a perfume impact very strong.

Claims (7)

1. A liquid fabric softener composition which includes: i) a softening quaternary ammonium agent of tissues and; ii) from 0.1% by weight to 10% by weight of a mixture perfume / carrier substance that has a slip point by below 37 ° C in which the quaternary ammonia softening agent of tissues is fine 14

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where each group R_ {1} is selected independently of the alkyl, or hydroxyalkyl groups C 1-4 or C 2-4 alkenyl; Y where each R2 is independently selected from the groups C 8-28 alkyl or alkenyl; T is -O-

 \ uelm {C} {\ uelm {\ dpara} {O}} 

- or; -

 \ uelm {C} {\ uelm {\ dpara} {O}} 

-OR-; Y N is an integer from 0-5; or fifteen where R_ {1}, n and R2 are as defined previously, and also the proportion of perfume to substance carrier is from 1:50 to 1: 1. 2. A liquid fabric softener composition according to claim 1 wherein the carrier substance It is an organic material. 3. A liquid fabric softener composition according to any previous claim in which the carrier substance in a fatty ester of a mono alcohol or polyhydrate having 1 to about 24 carbon atoms in the hydrocarbon chain with the condition that the total number of carbon atoms in the carrier substance is equal to or greater than 16 and at least one of the hydrocarbon radicals in the ester has 12 or more carbon atoms. 4. A liquid fabric softener composition according to claim 1 wherein the carrier substance It is tallow oil. 5. A liquid fabric softener composition according to any previous claim in which the mixing ratio perfume / carrier substance to ammonium agent Quaternary fabric softener is in the 5: 1 ratio to 1:10 6. A liquid fabric softener composition according to any preceding claim that is in the form of an aqueous dispersion. 7. A process to prepare a composition liquid fabric softener as defined in any of the previous claims comprising the following steps:

i)

formation of a aqueous dispersion of the softening quaternary ammonium agent of tissues;

ii)

addition of perfume / carrier substance dispersion mixture resulting.