초록 ▼

A novel hydrophilic ampholytic polymer synthesized by reacting polymerizable amino and carboxy functional ethylenically unsaturated monomers, together with a non-ionic hydrophilic monomer, to provide a polymer having a glass transition temperature (Tg) above about 50.degree. C., and optionally hydro

A novel hydrophilic ampholytic polymer synthesized by reacting polymerizable amino and carboxy functional ethylenically unsaturated monomers, together with a non-ionic hydrophilic monomer, to provide a polymer having a glass transition temperature (Tg) above about 50.degree. C., and optionally hydrophobic monomer(s), and cross-linking monomer(s). The copolymer is precipitated from a polymerization media which includes a suitable organic solvent. The resulting copolymer is in the form of a fine powder, with submicron particle size. As such it is suitable for use as a thickener or rheology modifier in personal care formulations, such as shampoo, conditioner, and the like, as a bioadhesive, and for other pharmaceutical applications.

대표청구항 ▼

1. A hydrophilic ampholytic polymer formed by copolymerization of:0.05 to 20 mole percent of an anionic monomer having at least one carboxy-functional group; 10 to 45 mole percent of a non-quaternized cationic monomer having at least one amino-functional group; 35 to 95 mole percent of a non-ionic h

1. A hydrophilic ampholytic polymer formed by copolymerization of:0.05 to 20 mole percent of an anionic monomer having at least one carboxy-functional group; 10 to 45 mole percent of a non-quaternized cationic monomer having at least one amino-functional group; 35 to 95 mole percent of a non-ionic hydrophilic monomer; 0.5 to 10 mole percent of a hydrophobic monomer; and, 0 to 1.5 mole percent of a cross-linking monomer, and wherein the monomers are selected so as to provide the copolymer with a glass transition temperature of above about 50.degree. C. and the non-quaternized cationic monomer to the anionic monomer ratio is from about 2:1 to about 16:1.