Patent · US Expired

Paper size based on finely divided aqueous dispersions

US4855343A · kind A · utility

38Cited by

7References

6Claims

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	Jul 16, 1987
Grant date	Aug 8, 1989
Priority date	—
Expiry date	Jul 16, 2007

Classification

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

Abstract

Sizes for paper are based on finely divided aqueous dispersions of copolymers which are obtainable by copolymerization of from 10 to 56 parts by weight of a monomer mixture of (a) from 20 to 65% by weight of (meth)acrylonitrile, (b) from 35 to 80% by weight of one or more acrylates of monohydric, saturated C.sub.3 -C.sub.8 -alcohols and (c) from 0 to 10% by weight of other ethylenically unsaturated copolymerizable monomers by an emulsion polymerization method in 100 parts by weight of an aqueous solution of from 1.7 to 25% by weight of a degraded starch having a viscosity .eta..sub.i of from 0.12 to 0.50 dl/g, at from 40.degree. to 100.degree. C. in the presence of a peroxide-containing initiator.

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