Patent · US Expired

Engine size for paper, based on fatty alkyl diketenes and cationic polyacrylamides

US4770743A · kind A · utility

4Cited by

5References

6Claims

0Family size

Assignee

BASF SE

Inventors

Volkmar Weberndoerfer · Mannheim, DE
Enrique Freudenberg · Schifferstadt, DE
Hans-Juergen Degen · Lorsch, DE
Ulrich Riebeling · Schifferstadt, DE

Key dates

Filing date	Jul 10, 1987
Grant date	Sep 13, 1988
Priority date	—
Expiry date	Jul 10, 2007

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H17/455
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Engine sizes for paper are based on aqueous emulsions of C.sub.14 -C.sub.20 -alkyl diketenes and cationic copolymers of PA0 (a) from 40 to 99% by weight of acrylamide and/or methacrylamide, PA0 (b) from 1 to 40% by weight of an unsubstituted or substituted N-vinylimidazoline and PA0 (c) from 0 to 30% by weight of an unsubstituted or substituted N-vinylimidazole.

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