Water-soluble copolymers containing vinylamine units as wet stre

Details Water-soluble copolymers containing vinylamine units as wet stre Water-soluble copolymers containing vinylamine units as wet stre

1989-09-05

1990-12-18

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621683, 1621685, D21H 1745

Patent

active

049784277

ABSTRACT:
Water-soluble copolymers containing copolymerized vinylamine units are prepared by copolymerizing (a) from 95 to 10 mol % of N-vinylformamide and (b) from 5 to 90 mol % of an ethylenically unsaturated monomer from the group consisting of vinyl acetate, vinyl propionate, C.sub.1 -C.sub.4 -alkyl vinyl ethers, the esters, nitriles and amines of acrylic acid and methacrylic acid and N-vinylpyrrolidone, and then eliminating from 30 to 100 mol % of the formyl groups from the copolymer. Preferred copolymers are copolymers of N-vinyl-formamide and vinyl acetate, in which from 30 to 100 mol % of the monomer units are hydrolyzed. The copolymers are used in papermaking to increase the dry strength and wet strength of the paper.

REFERENCES:
patent: 3597314 (1971-08-01), Laube et al.
patent: 4421602 (1983-12-01), Brunnmueller et al.

Affiliated with

Also associated with

Rating

Water-soluble copolymers containing vinylamine units as wet stre does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Water-soluble copolymers containing vinylamine units as wet stre, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water-soluble copolymers containing vinylamine units as wet stre will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1424204