US 4,291,018 AGranted

Lipstick of the core-sheath type

AssigneeKanebo, Ltd.

InventorsIchiro Oeda, Isao Sano

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Abstract

This invention relates to a lipstick having a construction of the core-sheath type which comprises two different compositions A and B arranged in core-sheath relationship, the composition A consisting essentially of a homogeneous mixture of from 53 to 85% by weight of a low-viscosity oily ingredient having a viscosity of less than approximately 80 centipoises at 36.degree. C. and from 15 to 47% by weight of a waxy ingredient having the form of a solid at 36.degree. C. and the composition B consisting essentially of a homogeneous mixture of from 40 to 90% by weight of a viscous oily ingredient having a viscosity of at least 200 centipoises at 36.degree. C. and from 10 to 60% by weight of said waxy ingredient. When applied to the lips, this lipstick causes no tacky or disagreeable sensation, spreads well with a soft feel and a light touch, adheres evenly to the lips and gives protection thereto, and provides a good and beautiful gloss, clarity, hue, and color development.

Claims9

Dependent claims

In a lipstick of the core-sheath type comprising two different compositions A and B arranged in core-sheath relationship along the longitudinal axis thereof, the improvement wherein said composition A consists essentially of a homogeneous mixture of

(i) from 55 to 75% by weight of a low-viscosity oily ingredient having a viscosity of less than approximately 80 centipoises at 36.degree. C.;
(ii) from 8 to 28% by weight of a viscous oily ingredient having a viscosity of at least approximately 200 centipoises at 36.degree. C.;
and
(iii) from 17 to 30% by weight of a waxy ingredient which is solid at 36.degree. C.;
and wherein said composition B consists essentially of a homogeneous mixture of
(iv) from 50 to 75% by weight of (ii);
(v) from 15 to 30% by weight of (iii);
and
(vi) from 5 to 20% by weight of (i);
said compositions A and B comprising from 77 to 100% by weight of the respective homogeneous mixture and having melting points of from 60.degree. to 75.degree. C. and the temperature difference therebetween being from 0.degree. to 5.degree. C.;
the weight of the composition of the core with respect to that of the sheath being in a weight ratio ranging from 1:2 to 2:1.

8 more elements

Dependencies are inferred from the claim text.