초록

This invention is directed to high molecular weight water-soluble polymers comprised of zwitterionic, nonionic and cationic or anionic monomer units, and to the use of these polymers in papermaking processes.

대표청구항 ▼

1. A high molecular weight water-soluble charged polymer comprising from about 50 to about 99.8 mole percent one or more nonionic monomers, from about 0.1 to 9.9 mole percent of one or more cationic or anionic monomers, and from about 0.1 to about 49.9 mole percent of one or more zwitterionic monome

1. A high molecular weight water-soluble charged polymer comprising from about 50 to about 99.8 mole percent one or more nonionic monomers, from about 0.1 to 9.9 mole percent of one or more cationic or anionic monomers, and from about 0.1 to about 49.9 mole percent of one or more zwitterionic monomers of formula wherein L+is a group of formula L-is a group of formula W+is --S+R3-- or --N+R2R3--; Z+is --N+R5R6R7; R1and R8are independently hydrogen or methyl; R2,R3,R4,R5,R6and R7are independently selected from hydrogen and C1-C4alkyl; Y1,Y2,and Y3are independently selected from O or NR2; m is 2 or 3; and n is 1-5. 2. The polymer of claim 1 wherein the cationic monomers are selected from the group consisting of dimethylaminoethylacrylate methyl chloride quaternary salt, diallyldimethylammonium chloride, (3-acrylamidopropyl)trimethylammonium chloride, (3-methacrylamido)propyltrimethylammonium chloride, dimethylaminoethylmethacrylate methyl chloride quaternary salt and dimethylaminoethylacrylate benzylchloride quaternary salt. 3. The polymer of claim 1 wherein the anionic monomers are selected from the group consisting of acrylamidopropanesulfonic acid, acrylic acid, methacrylic acid, monoacryloxyethyl phosphate and their sodium salts. 4. The high molecular weight water-soluble polymer of claim 1 comprising about 95 to about 99.8 mole percent of a nonionic monomer, about 4.9 to about 0.1 mole percent of a zwitterionic monomer and from about 4.9 to about 0.1 mole percent of a cationic monomer. 5. The high molecular weight water-soluble polymer of claim 1 comprising about 95 to about 99.8 mole percent of a nonionic monomer, about 4.9 to about 0.1 mole percent of a zwitterionic monomer and from about 4.9 to about 0.1 mole percent of an anionic monomer. 6. The high molecular weight water-soluble polymer of claim 1 wherein the nonionic monomers are selected from acrylamide, methacrylamide, N-methylacrylamide, N,N-dimethyl(meth)acrylamide, N-isopropyl(meth)acrylamide, N-(2-hydroxypropyl)methacrylamide, N-methylolacrylamide, N-vinylformamide, N-vinylacetamide, N-vinyl-N-methylacetamide, poly(ethylene glycol)(meth)acrylate, poly(ethylene glycol) monomethyl ether mono(meth)acryate, N-vinyl-2-pyrrolidone, glycerol mono((meth)acrylate), 2-hydroxyethyl(meth)acrylate, vinyl methylsulfone and vinyl acetate. 7. The high molecular weight water-soluble polymer of claim 1 wherein the nonionic monomers are selected from acrylamide and methacrylamide. 8. The high molecular weight water-soluble polymer of claim 1 wherein the nonionic monomer is acrylamide. 9. The high molecular weight water-soluble polymer of claim 1 wherein the nonionic monomer is acrylamide and the zwitterionic monomer is 10. The high molecular weight water-soluble polymer of claim 1 wherein the nonionic monomer is acrylamide and the zwitterionic monomer is 11. The high molecular weight water-soluble polymer of claim 1 wherein the nonionic monomer is acrylamide and the zwitterionic monomer is 12. The high molecular weight water-soluble polymer of claim 1 wherein the nonionic monomer is acrylamide and the zwitterionic monomer is selected from N,N-dimethyl-N-acryloyloxyethyl-N-(3-sulfopropyl)-ammonium betaine, N,N-dimethyl-N-acrylamidopropyl-N-(2-carboxymethyl)-ammonium betaine, N,N-dimethyl-N-methacryloyloxyethyl-N-(3-sulfopropyl)-ammonium betaine, N,N-dimethyl-N-methacrylamidopropyl-N-(3-sulfopropyl)-ammonium betaine, 2-(methylthio)ethyl methacryloyl-S-(sulfopropyl)-sulfonium betaine, 2-[(2-acryloylethyl)dimethylammonio]ethyl 2-methyl phosphate,