Patent · US Expired

Sizing agents for paper based on finely divided aqueous dispersions

US4835212A · kind A · utility

44Cited by

5References

7Claims

0Family size

Assignee

BASF SE

Inventors

Hans-Juergen Degen · Lorsch, DE
Fritz Reichel · Hirschberg, DE
Ulrich Riebeling · Schifferstadt, DE
Lothar Hoehr · Worms, DE

Key dates

Filing date	Jan 20, 1988
Grant date	May 30, 1989
Priority date	—
Expiry date	Jan 20, 2008

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H21/16
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Sizing agents for paper are based on finely divided aqueous dispersions of copolymers obtainable by copolymerizing from 40 to 140 parts by weight of a monomer mixture of PA0 (a) from 20 to 65% by weight of (meth)acrylonitrile, PA0 (b) from 35 to 80% by weight of one or more acrylates of monohydric saturated C.sub.3 -C.sub.8 -alcohols and PA0 (c) from 0 to 10% by weight of other ethylenically unsaturated copolymerizable monomers, the weight percentages (a), (b) and (c) always adding up to 100, in the manner of an emulsion polymerization in 100 parts by weight of an aqueous solution containing in solution from 2.7 to 15% by weight of a degraded starch having a viscosity n.sub.i from 0.04 to less than 0.12 dl/g at from 40.degree. to 100.degree. C. in the presence of a peroxide initiator.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.