Cationic group-containing copolymer and thickener

Details Cationic group-containing copolymer and thickener Cationic group-containing copolymer and thickener

1998-06-03

2000-05-30

Lipman, Bernard

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526265, 526304, 526305, 5263072, 5263077, C08F12606

Patent

active

060692162

ABSTRACT:
A cationic group-containing copolymer is provided which possesses excellent thixotropy and exhibits high adsorbability to the skin, hair, etc. and, when incorporated as a thickener in cosmetic articles, manifests a very satisfactory tactile sensation. The cationic group-containing copolymer is characterized in that the viscosity at 25.degree. C. of the aqueous solution prepared by incorporating the copolymer in deionized water at a concentration of 0.5 wt. % is in the range of 0.3-20 Pa.multidot.sec. at a shear rate of 1 sec.sup.-1 and in the range of 0.01-5 Pa.multidot.sec. at a shear rate of 10 sec.sup.-1 and the viscosity at a shear rate of 1 sec.sup.-1 is higher than the viscosity at a shear rate of 10 sec.sup.-1. This cationic group-containing copolymer is obtained by particularly using a cationic group-containing vinyl monomer, a hydrophilic nonionic group-containing vinyl monomer such as N,N-dimethyl (meth)acrylamide or N,N-diethyl (meth)acrylamide, and a cross-linking vinyl monomer containing at least two vinyl groups in the molecular unit thereof as essential component monomers and radically polymerizing the essential component monomers. A thickener made of the copolymer is also disclosed.

REFERENCES:
patent: 5100660 (1992-03-01), Hawe et al.
patent: 5362827 (1994-11-01), Bock et al.
patent: 5698627 (1997-12-01), Oguni et al.
patent: 5700892 (1997-12-01), Takiguchi et al.

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