Cosmetic composition

Claim 2

A cosmetic composition containing a pigment or an extender pigment the surfaces of which are coated with 0.5-10 weight %, based on the weight of said pigment or extender pigment, of metal salt of N-acylamino acid selected from the group consisting of (I), (II) and (III): ##STR2## wherein RCO denotes a residue of capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, or oleic acid; M denotes aluminum atom, magnesium atom, calcium atom, zinc atom, zirconium atom, or titanium atom; k is an integer of 1 to 3; l is an integer of 1 to 2; and m is an integer of 1 to 4; in combination with cosmetically acceptable ingredients.

Claim 3

The cosmetic composition of claim 1, wherein the pigment or extender pigment having surfaces coated with the N-acylamino acid metal salt is further coated with a member selected from the group consisting of liquid paraffin, squalene, petrolatum, microwax, polyisobutylene, myristic acid, stearic acid, lauric acid, selemine, isopropylmyristate, myristyldodecanol, coconut oil, castor oil, lanoline, beeswax, olive oil, stearyl alcohol, milk oil, oleyl alcohol, and monostearic gylceride.

Claim 4

The cosmetic composition of any one of claims 1 or 2 wherein the N-acylamino acid is one selected from the group consisting of N-acyl-N-methyl-glycine, N-acyl-N-methyl-β-alanine, and N-acyl-L-glutamic acid.

Claim 5

The cosmetic composition of claim 3, wherein the N-acylamino acid is N-acyl-L-glutamic acid.

Claim 6

The cosmetic composition of any one of claims 1 or 2, wherein the pigment or extender pigment is at least one member selected from the group consisting of titanium oxide, zinc oxide, zirconium oxide, red iron oxide, yellow iron oxide, black iron oxide, ultramarine blue, Berlin blue, chromium oxide, chromium hydroxide, talc, kaoline, white mica powder, sericite, magnesium carbonate, calcium carbonate, aluminum silicate, magnesium silicate, calcium silicate, clay, mica titan, bismuth oxychloride, nylon powder, polyethylene powder, coal tar coloring material, and natural coloring matter.

Claim 7

In a cosmetic composition wherein an amino acid is employed as an emulsifier or dispersing agent, the improvement comprising employing as the amino acid a water-insoluble metal salt of N-acylamino acid selected from the group consisting of (I), (II) and (III): ##STR3## wherein RCO denotes a residue of capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, or oleic acid; M denotes aluminum atom, magnesium atom, calcium atom, zinc atom, zirconium atom, or titanium atom; k is an integer of 1 to 3; l is an integer of 1 to 2; and m is an integer of 1 to 4.

Claim 8

In a cosmetic composition wherein an amino acid is employed as an emulsifier or dispersing agent, the improvement comprising employing as the amino acid a water-insoluble metal salt of N-acylamino acid selected from the group consisting of (I), (II) and (III): ##STR3## wherein RCO denotes a residue of capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, or oleic acid; M denotes aluminum atom, magnesium atom, calcium atom, zinc atom, zirconium atom, or titanium atom; k is an integer of 1 to 3; l is an integer of 1 to 2; and m is an integer of 1 to 4.

Claim 9

A cosmetic composition comprising a pigment and an extender pigment the surfaces of which are coated with 0.5-10 weight %, based on the weight of said pigment and extender pigment, of a metal salt of N-acylamino acid selected from the group consisting of (I), (II) and (III): ##STR4## wherein RCO denotes a residue of capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, or oleic acid; M denotes aluminum atom, magnesium atom, calcium atom, zinc atom, zirconium atom, or titanium atom; k is an integer of 1 to 3; l is an integer of 1 to 2; and m is an integer of 1 to 4; in combination with cosmetically acceptable ingredients.

Claim 10

A cosmetic composition comprising a pigment and an extender pigment the surfaces of which are coated with 0.5-10 weight %, based on the weight of said pigment and extender pigment, of a metal salt of N-acylamino acid selected from the group consisting of (I), (II) and (III): ##STR4## wherein RCO denotes a residue of capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, or oleic acid; M denotes aluminum atom, magnesium atom, calcium atom, zinc atom, zirconium atom, or titanium atom; k is an integer of 1 to 3; l is an integer of 1 to 2; and m is an integer of 1 to 4; in combination with cosmetically acceptable ingredients.