WO2015018606A1

WO2015018606A1 - Cosmetic composition

Info

Publication number: WO2015018606A1
Application number: PCT/EP2014/065028
Authority: WO
Inventors: Lin Wang; Yan Wu; Nan Yang
Original assignee: Unilever N.V.; Unilever Plc; Conopco, Inc., D/B/A Unilever
Priority date: 2013-08-08
Filing date: 2014-07-14
Publication date: 2015-02-12
Also published as: ZA201600535B

Abstract

Disclosed is a cosmetic composition comprising fatty acid,fatty acid salt, and pigment, wherein the cation of fatty acid salt comprises inorganic cation and organic ammonium, and the total amount of fatty acid and fatty acid salt is at least 5% by weight of the composition.

Description

COSMETIC COMPOSITION

Field of the invention

The present invention relates to a cosmetic composition. In particular, the cosmetic composition comprising fatty acid, fatty acid salt, and pigment, wherein the cation of fatty acid salt comprises inorganic cation and organic ammonium, and the total amount of fatty acid and fatty acid salt is at least 5% by weight of the composition. Such a composition can prevent/reduce pigment settling while still maintaining desirable skin feel properties, as well as rheological property.

BACKGROUND OF THE INVENTION

Cosmetic compositions are well known and have been widely used for long time.

Typically, consumers use these products to deliver the benefits of cleaning, anti-aging, skin-lighting and so on. When the consumers go to the supermarket to buy their cosmetic product, the appearance of these products may be a very important factor to guide purchase. Those products which can differentiate themselves from others may be more appealing to the consumer. Therefore, different pigments, as important ingredient to deliver appealing appearance, are usually added into the cosmetic composition to attract consumers.

However, sometimes there are difficulties when incorporating pigment into the cosmetic composition. For example, the microstructure of some cosmetic compositions, in particular vanishing cream, may not sustain the pigment and thus induce pigment settling.

We have identified that there is a need to develop a cosmetic composition containing pigment but without pigment settling while maintaining its desirable properties.

Therefore, the present invention provides a cosmetic composition comprising fatty acid, fatty acid salt, and pigment, wherein the cation of fatty acid salt comprises inorganic cation and organic ammonium, and the total amount of fatty acid and fatty acid salt is at least 5% by weight of the composition. It was surprisingly found that such a

composition can prevent/reduce pigment settling while still maintaining desirable skin feel properties, as well as rheological property. DEFINITIONS

Vanishing cream

"Vanishing cream" as used herein typically refers to the cream that can provide typical sensory draggy, and absorb or "vanish" rapidly into the skin.

Viscosity

Viscosities of the present invention were measured by a rheometer (Anton Paar Rheometer MCR501 , Austria) system with sandblasted parallel plate (PP50), with a plate-plate gap of 0.5 mm, at a shear rate of 10 s^"1 and at 25 °C.

Miscellaneous

Except in the examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material or conditions of reaction, physical properties of materials and/or use may optionally be understood as modified by the word "about".

All amounts are by weight of the final composition, unless otherwise specified.

It should be noted that in specifying any range of values, any particular upper value can be associated with any particular lower value.

For the avoidance of doubt, the word "comprising" is intended to mean "including" but not necessarily "consisting of" or "composed of. In other words, the listed steps or options need not be exhaustive.

The disclosure of the invention as found herein is to be considered to cover all embodiments as found in the claims as being multiply dependent upon each other irrespective of the fact that claims may be found without multiple dependency or redundancy.

Where a feature is disclosed with respect to a particular aspect of the invention (for example a composition of the invention), such disclosure is also to be considered to apply to any other aspect of the invention (for example a method of the invention) mutatis mutandis.

SUMMARY OF THE INVENTION

In a first aspect, the present invention is directed to a cosmetic composition comprising fatty acid, fatty acid salt and pigment, wherein the cation of fatty acid salt comprises inorganic cation and organic ammonium, and the amount of fatty acid and fatty acid salt is at least 5% by weight of the composition. In a second aspect, the present invention is directed to a process for preparing a cosmetic composition of the present invention comprising the step of combining at least 5% of fatty acid by weight of the composition, inorganic hydroxide, organic amine and pigment. All other aspects of the present invention will more readily become apparent upon considering the detailed description and examples which follow.

DETAILED DESCRIPTION

The fatty acid can be any suitable fatty acid, typically contains fatty acid moieties with chain lengths of from C12 to C₂₄. In certain preferred embodiments, the hydrocarbon chain length of the fatty acid used is from 14 to 22, more preferably 14 to 20, even more preferably 16 to 18 carbon atoms. Suitable fatty acid comprises pelargonic, lauric, myristic, palmitic, isopalmitic, stearic, isostearic, oleic, linoleic, ricinoleic, arachidic, behenic, erucic acid or a mixture thereof. More preferably, the fatty acid comprises stearic, lauric, palmitic, isostearic acid, myristic or a mixture thereof. Even more preferably, the fatty acid is stearic acid, palmitic acid or a mixture thereof.

The fatty acid may also contain relatively pure amounts of one chain length fatty acid moiety. Although normally saturated, suitable fatty acid may contain unsaturated fatty acid moieties, and may contain fatty acid moieties having a degree of substitution, such as e. g. hydroxy fatty acids. However, it is preferred that the fatty acid is selected from the group comprising saturated fatty acids or a combination of saturated fatty acids and unsaturated fatty acids. Typically, amounts of fatty acid will range from 6 to 40%, more preferably from 8 to 30%, even more preferably from 10 to 25%, optimally from 12 to 20% by weight of the composition.

Advantageously the fatty acid may be present as asymmetric solid particles.

Asymmetric is understood to mean that at least two of three dimensions on a majority of the particles are not size identical. These particles can be oval or plate-like.

Average particle size along greatest length may range from 0.01 to 500 micron and preferably from 1 to 100 micron. The primary particle size may be measured by scanning electron microscopy. Without wishing to be bound by any theory or explanation, the particles are employed in the composition to impart a cream-like viscosity and by virtue of being asymmetric, the particles deliver high skin friction. Fatty acid salt is preferably present in amount of from 0.01 to 20%, more preferably from 0.1 to 15%, even more preferably from 0.2 to 10%, and most preferably from 0.5 to 5% by weight of the composition. The molar ratio of fatty acid to fatty acid salt is preferably in the range of 1 :4 to 50:1 , more preferably from 1 :1 to 20:1 , even more preferably from 3:1 to 12:1 and most preferably from 6:1 to 8:1 .

Typically, the fatty acid salt comprises a salt of a C12-C24 fatty acid, more preferably C14-C2₀ fatty acid and even more preferably Ci₆-Ci₈ fatty acid. Suitable fatty acid salt comprises pelargonate, laurate, myristate, palmitate, stearate, isostearate, oleate, linoleate, ricinoleate, arachidate, behenate, erucate salt or a mixture thereof. More preferably, the fatty acid salt comprises stearate, laurate, palmitate, isostearate salt or a mixture thereof. Even more preferably, the fatty acid salt is stearate salt, palmitate salt or a mixture thereof.

The fatty acid salt is preferably produced in situ by neutralizing the fatty acid.

Therefore, the fatty acid salt is preferably the salt of the fatty acid of the composition.

According to the present invention, the cation of the fatty acid salt comprises inorganic cation and organic ammonium. Preferably, the inorganic cation is selected from ammonium, alkali cation, alkali earth cation, or a mixture thereof. More preferably, the inorganic cation may be selected from sodium, potassium, ammonium or a mixture thereof, and even more preferably the inorganic cation is potassium. The most preferred inorganic cation fatty acid salt is potassium stearate, potassium palmitate, or a mixture thereof. The amount of fatty acid salt having inorganic cation is preferably from 0.001 to 15%, more preferably from 0.05 to 8%, even more preferably from 0.1 to 5% and most preferably from 1 to 3% by weight of the composition.

Preferably, the organic ammonium comprises alkanolammonium, more preferably diethanolammonium, triethanolammonium, hydroxy ethylidene dimethyl ammonium, or a mixture thereof, even more preferably triethanolammonium cation. Most preferred organic ammonium fatty acid salt is triethanolammonium stearate. The amount of fatty acid salt having organic ammonium is preferably from 0.001 to 15%, more preferably from 0.05 to 8%, even more preferably from 0.1 to 5% and most preferably from 0.6 to 2.5% by weight of the composition.

To prevent/reduce pigment settling and/or have a better sensory, the molar ratio of the fatty acid salt having inorganic cation to the fatty acid salt having organic ammonium is preferably in the range of 1 :8 to 8:1 , more preferably from 1 :5 to 5:3, and most preferably from 3:2 to 2:3.

The total amount of the fatty acid and fatty acid salt is preferably from 6 to 50%, more preferably from 8 to 40%, even more preferably from 12 to 28%, optimally from 15 to 22% by weight of the composition.

The pigment of the present invention may be any pigment suitable for cosmetic composition. The amount of the pigment is preferably from 0.00001 to 10% by weight of the composition, more preferably from 0.001 to 6%, more preferably from 0.01 to 3% and most preferably 0.02 to 1 % by weight of the composition.

Pigment is practically insoluble particle, preferably it has a primary particle size of 0.01 to 10 μηη, where the distance represent the longest dimension of the primary particle. The primary particle size may be measured by scanning electron microscopy. Most preferably the pigments have a primary particle size between 0.2 to 2 μηη.

The pigment may comprise coloured pigment and/or white pigment. However, to make the composition more appealing to consumers, in preferred embodiments the pigment comprises coloured pigment. Coloured pigment as used herein refers to the pigment which is substantially different from white pigment. The amount of coloured pigment of is in the range of 0.00001 to 10%, more preferably from 0.0001 to 1 %, even more preferably from 0.001 to 0.1 % by weight of the total composition. The weight ratio of the fatty acid salt to the coloured pigment is preferably in the range from 1000:1 to 10:1 , more preferably from 300:1 to 30:1.

Suitable coloured pigment may be inorganic or organic, but preferably the coloured pigment comprises inorganic pigment. The coloured pigment include, but are not limited to, D&C Red No. 36 and D&C Orange No.17, the calcium lakes of D&C Red Nos. 7,1 1 , 31 and 34, the barium lake of D&C Red No.12, the strontium lake D&C Red No.13, the aluminum lakes of FD&C Yellow No. 5, of FD&C Yellow No.6, of D&C Red No.27, of D&C Red No.21 , and of FD&C Blue No.1 , iron oxides, manganese violet, chromium oxide, ultramarine blue, and carbon black particles.

The coloured pigment particularly preferably comprises the pigment iron oxides. These often are mixtures of differently coloured iron oxides which may be red, yellow, brown and black. In more preferred embodiments, the pigment comprises coloured pigment and white pigment. Preferably, the white pigment comprises titanium dioxide, zinc oxide, barium oxide, talc, calcium carbonate or a mixture thereof. More preferably, the white pigment is selected from titanium dioxide, zinc oxide, barium oxide, or a mixture thereof. Even more preferably, the white pigment comprises titanium dioxide and most preferably the white pigment is titanium dioxide. The white pigment is preferably present in amount of 0.001 to 10% by weight of the composition, more preferably from 0.01 to 5%, even more preferably from 0.05 to 3% and most preferably from 0.1 to 1 .5% by weight of the composition. The composition of the present invention may contain a variety of other components, for example humectant, fatty alcohol, sunscreen active, skin lightening agent, preservative, cosmetically acceptable carrier or a mixture thereof.

Preferably, the humectant comprises polyhydric alcohol. Typical polyhydric alcohols include glycerol, polyalkylene glycols, alkylene polyols and their derivatives, including propylene glycol, dipropylene glycol, polypropylene glycol, polyethylene glycol and derivatives thereof, sorbitol, hydroxypropyl sorbitol, isoprene glycol, hexylene glycol, 1 ,3-butylene glycol, 1 ,2,6-hexanetriol, ethoxylated glycerol, propoxylated glycerol and mixtures thereof. More preferred humectant is glycerol. The amount of humectant may range anywhere from about 0.5 to about 30%, preferably between 1 and 15% by weight of the composition.

Fatty alcohols suitable for this invention are preferably those having carbon chain lengths ranging from 10 to 30 carbon atoms. Illustrative of suitable fatty alcohols are lauryl alcohol, cetyl alcohol, isocetyl alcohol, stearyl alcohol, isostearyl alcohol and combinations thereof. Most preferred is cetyl alcohol. The amount of fatty alcohol is preferably from 0.01 to 10%, more preferably from 0.1 to 6% and most preferably from 0.2 to 2% by weight of the composition. The sunscreen active may be inorganic or organic. Non-limiting examples of suitable organic sunscreen agents that may be used in the sunscreen composition include, for example, para-aminobenzoic acid (PABA), butyl methoxydibenzoylmethane

(avobenzone), benzophenone-l, benzophenone-2, benzophenone-3, benzophenone-4, benzophenone-6, benzophenone-8, benzophenone-12, methoxycinnamate, ethyl dihydroxypropyl-PABA, glyceryl PABA, homosalate, methyl anthranilate, octocrylene, octyldimethyl PABA, octyl methoxycinnamate, octyl salicylate, 2-phenylbenzimidazole- 5-sulphonic acid, triethanolamine salicylate, 3-(4-methylbenzylidene)-camphor, 3-(4- methylbenzyldine)boran-2-one (methylbenzindinecamphor), benzotriazole, phenylbenzimidazole-5-sulfonic acid, methylene bis-benzotrizolyltetramethylbutyl phenol, and mixtures thereof. Preferred organic sunscreen active includes octocrylene, 4-t-butyl-4'-methoxydibenzoylmethane which is known as Avobenzone™ or Parsol 1789™, para-methoxy cinnamic acid and its derivative e.g. ethylhexyl

methoxycinnamate which is known as Parsol MCX™, or a mixture thereof. Inorganic sunscreen actives may include, for example, microfine zinc oxide iron oxide, silica, such as fumed silica, and titanium dioxide. By the term "microfine" is meant particles of average size ranging from 5 to 200 nm, preferably from 10 to 100 nm, even more preferably from 15 to 80 nm. The amount of the sunscreen active is preferably from 0.01 % to 10%, more preferably from 0.1 % to 5% by weight of the composition.

The skin lightening agent may be present in the composition. Any skin lightening agent suitable for cosmetic composition may be used for the present invention. Vitamin B3 compound or its derivative e.g. niacin, nicotinic acid, niacinamide are the preferred skin lightening agent as per the invention, most preferred being niacinamide. Skin lightening agent, when used, is preferably present in an amount in the range of 0.1 to 10%, more preferably 0.2 to 5% by weight of the composition.

Preservatives may also desirably be incorporated into the cosmetic compositions of this invention to protect against the growth of potentially harmful microorganisms.

Suitable traditional preservatives include alkyl esters of parahydroxybenzoic acid.

Other preservatives which have more recently come into use include hydantoin derivatives, propionate salts, and a variety of quaternary ammonium compounds.

Particularly preferred preservatives are disodium EDTA, phenoxyethanol, methyl paraben, butyl paraben, propyl paraben, imidazolidinyl urea, sodium dehydroacetate and benzyl alcohol. Preservatives are preferably employed in amounts ranging from about 0.01 % to about 2% by weight of the composition.

Compositions of the present invention may include a cosmetically acceptable carrier. Carriers may be present in amounts ranging from 5 to 95%, preferably from 20 to 90%, optimally from 40 to 85% by weight of the cosmetic compositions. Water is the most common carrier for this invention. The composition may comprise water in amount of 10 to 95% by weight of the composition, more preferably from 45 to 92%, even more preferably from 52 to 90%, most preferably from 66% to 84% by weight of the composition. The composition of the present invention may be produced in any suitable way.

However, it is preferred that the process for preparing the composition comprises the step of combining at least 5% of fatty acid by weight of the composition, inorganic hydroxide, organic amine and pigment. Preferably, the amount of fatty acid of is from 5 to 50%, more preferably from 7 to 40%, even more preferably from 10 to 32%, optimally from 12 to 25% by weight of the composition.

More preferably, the process comprises the step of: (a) partially neutralizing fatty acid by inorganic hydroxide, and organic amine to form a mixture; and (b) combining the mixture with the coloured pigment.

Both step (a) and (b) are preferably conducted at the temperature from 50 to 95 °C, more preferably from 60 to 95°C and most preferably from 70 to 85°C. Stirring and homogenization are preferred ways to help mixing and emulsification.

It is preferred that water is combined into the mixture in step (a), water is preferably in amount of 40 to 95% by weight of the composition, more preferably from 55 to 90%, and most preferably from 70 to 85% by weight of the composition.

Without wishing to be bound by any theory or explanation, the inventors believe that the partial neutralisation leads to the formation of fatty acid salt complexed with free fatty acid. The swollen composition is believed to form the basis of the resulting viscous cream or lotion. The neutralisation of fatty acid by both organic hydroxide and organic amine produce more cross-linked structure and therefore prevent/reduce pigment settling. The inorganic hydroxide is preferably selected from ammonium hydroxide, alkali hydroxide, alkali earth hydroxide, or a mixture thereof. More preferably, the inorganic hydroxide is selected from sodium hydroxide, potassium hydroxide, ammonium hydroxide, or a mixture thereof, and even more preferably the inorganic hydroxide is potassium hydroxide. The amount of inorganic hydroxide is preferably from 0.001 to 5%, more preferably from 0.01 to 3%, even more preferably from 0.05 to 1 % and most preferably from 0.1 to 0.5% by weight of the composition.

Preferably, the organic amine comprises alkanolamine, more preferably

diethanolamine, triethanolamine, 2-dimethylaminoethanol, or a mixture thereof, even more preferably triethanolamine. The amount of organic amine is preferably from 0.001 to 8%, more preferably from 0.05 to 8%, even more preferably from 0.1 to 3% and most preferably from 0.2 to 1 .2% by weight of the composition. The molecular ratio of inorganic hydroxide to organic amine is preferably in the range of 1 :5 to 10:1 , more preferably from 2:3 to 6:1 , and most preferably from 3:2 to 4:1.

The cosmetic composition is preferably a leave-on product, and most preferably a vanishing cream. The viscosity is preferably from 1 to 500 Pa-s, more preferably from 5 to 150 Pa-s, even more preferably from 10 to 60 Pa-s, and most preferably from 20 to 40 Pa-s.

The following examples are provided to facilitate an understanding of the invention. The examples are not intended to limit the scope of the claims.

EXAMPLES

A series of samples were prepared according to Table 1 by following standard preparation procedure for vanishing cream. Table 1

a. Edenor ST1 MY, 45 wt% of stearic acid and 55 wt% palmitic acid supplied by Emery Oleochemicals.

b. MT700Z, Titanium Dioxide (and) Stearic Acid (and) Aluminium Hydroxide supplied by TAYCA.

c. BGBO-TTB2, Iron Oxides (C.I. 77499) (And) Triethoxysilylethyl

Polydimethylsiloxyethyl Dimethicone (And) Isopropyl Titanium Triisostearate supplied by KOBO.

Pigment settling Test

The samples were packaged into identical transparent jars with equal amount and left for one week at room temperature (about 25°C). These packaged samples were placed into cabinets with pre-set temperatures of 4 °C, 25 °C, and 45 °C respectively for three months. Then, these samples were checked by naked eye if the colours of the products were even from top to bottom of these jars. If the colour in the bottom of the jar was significantly stronger than the colour in the top of the jar, it was believed that there was pigment settling in the product and the test was failed. Otherwise, the product is judged as passing the test. The evaluation results are shown in Table 2. Table 2

x: fail; V: pass

As can be seen from Table 2, sample 2, 3 and B passed the test at 4, 25 and 45°C. Sample 1 passed the test for 25 and 45 °C but failed the test at 4°C. It was demonstrated that the addition or replacement of soap of organic ammonium can prevent and/or reduce pigment settling.

Viscosity test

After storage at room temperature (about 25°C) for one week, the viscosities of the samples were measured by a rheometer (Anton Paar Rheometer MCR501 , Austria) system with sandblasted parallel plate (PP50), with a plate-plate gap of 0.5 mm, at a shear rate of 10 s^"1 and at about 25 °C. The results were shown in Table 3.

Table 3

As shown in Table 3, the viscosity of the samples 1 , 2 and 3 are closer to that of sample A than sample B, thus, the inclusion of both fatty acid salt having inorganic cation and organic ammonium maintained the rheological property, in particular viscosity, better than that of composition containing fatty acid salt having inorganic cation only.

Sensory Test The sensory of the sample A, 2, and 3 was evaluated by an expert panel with 18 members. Each panellist gave scores on 32 attributes including initial, in-use and post- use properties for each formulation. It was surprisingly found that sample 2 was on parity with that of sample A for all attributes, and sample 3 was on parity with sample A for key attributes including, for example, absorption time, spreadability, in-use sensory including draggy, and after-use sensory including draggy.

Film friction coefficient test

The friction coefficient of the film formed by the composition of the present invention was measured at 23 °C and relative humidity of 45% by a home-made instrument, a motor driven mechanical finger, with accelerometers and loading cells.

0.125g sample was spread evenly on a bio-skin strip (Color: 30#, ex. BEAULAX, Co. Ltd., Tokyo, Japan) with size of 2.5 cm ^χ 13 cm. After naturally drying for two hours, the bio-skin strip was placed onto the sample station. The mechanical finger with attached piece of glove rubber was used to rub the bio-skin strip with fixed force which is perpendicular to the strip. Loading cells under the strip recorded the normal force experienced by the substrate under the rub of the finger. Then the friction coefficient for the interface between the finger and strip with sample was calculated according to paper by Akay et al. (Wear, Volume 276-277, 2012, Pages 61-69). The friction coefficient for naked bio-skin strip was also measured by the same method without spreading sample. If the friction coefficient of sample film/finger is greater than the naked bio-skin strip/finger, the sample would deliver "draggy" benefits to consumer.

Table 4

Samples Friction coefficient

Naked Bio-skin 0.399

A 0.624

1 0.506

2 0.481

3 0.535

B 0.576 Table 4 shows the results of friction coefficient of film formed by these samples. It was found that the friction for all samples was greater than the naked bio-skin strip and therefore be able to deliver draggy feel to consumers.

Claims

1. A cosmetic composition comprising fatty acid, fatty acid salt, and pigment, wherein the cation of fatty acid salt comprises inorganic cation and organic ammonium, and the total amount of fatty acid and fatty acid salt is at least 5% by weight of the composition.

2. The composition according to claim 1 wherein the fatty acid is present in amount of from 5% to 40% by weight of the composition, preferable from 8 to 30% by weight of the composition.

3. The composition according to claim 1 or 2 wherein the fatty acid is stearic acid, palmitic acid, or a mixture thereof.

4. The composition according to any one of the preceding claims wherein the fatty acid salt is present in amount of from 0.2 to 10% by weight of the composition, preferably from 0.5 to 5% by weight of the composition.

5. The composition according to any one of the preceding claims wherein the molar ratio of the fatty acid salt having inorganic cation to the fatty acid salt having organic ammonium is in the range of 1 :5 to 5:3.

6. The composition according to any one of the preceding claims wherein the

inorganic cation is selected from ammonium, alkali cation, alkali earth cation, or a mixture thereof, preferably the inorganic cation is potassium.

7. The composition according to any one of the preceding claims wherein the organic ammonium comprises alkanolammonium, preferably diethanolammonium, triethanolammonium, hydroxy ethylidene dimethyl ammonium.

8. The composition according to claim 7 wherein the organic ammonium is

triethanolammonium.

9. The composition according to any one of the preceding claims wherein the pigment comprises a coloured pigment, preferably iron oxide.

10. The composition according to any one of the preceding claims wherein the pigment further comprise a white pigment, preferably titanium dioxide, zinc oxide, barium oxide or a mixture thereof.

1 1. The composition according to any one of the preceding claims wherein the pigment is present in amount of from 0.00001 to 10% by weight of the composition, preferably from 0.01 to 3% by weight of the composition.

12. The composition according to any one of the preceding claims wherein the

composition is a vanishing cream.

13. The composition according to any one of the preceding claims wherein the

composition comprises humectant, fatty alcohol, sunscreen active, skin lightening agent, preservative, or a mixture thereof.

14. A process for preparing a cosmetic composition of any one of the preceding claim comprising the step of combining at least 5% of fatty acid by weight of the composition, inorganic hydroxide, organic amine and pigment.

15. The process according to claim 14 wherein the fatty acid is present in amount of from 7 to 40% by weight of the composition.

16. The process according to any one of claim 14 to 15 wherein the inorganic

hydroxide comprises ammonium hydroxide, alkali hydroxide, alkali earth hydroxide or a mixture thereof, preferably the inorganic hydroxide is potassium hydroxide.

17. The process according to any one of claim 14 to 16 wherein the organic amine comprises alkanolamine, preferably diethanolamine, triethanolamine, 2- dimethylaminoethanol.

18. The process according to any one of claim 14 to 17 wherein the inorganic

hydroxide is in amount of from 0.01 to 5% by weight of the composition.

19. The process according to any one of claim 14 to 18 wherein the organic amine is in amount of from 0.01 to 5% by weight of the composition.