Patent · US Expired

Auxiliary for improving retention, dewatering and working up, particularly in the manufacture of paper

US4267059A · kind A · utility

12Cited by

2References

5Claims

0Family size

Assignee

Wolff Walsrode AG · DE

Inventors

Rudolf Behn · Walsrode, DE
Lutz Hoppe
Branislav Bohmer · Walsrode, DE

Key dates

Filing date	Oct 15, 1979
Grant date	May 12, 1981
Priority date	—
Expiry date	Oct 15, 1999

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S210/928
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

An auxiliary for improving the retention of flushable solids, for accelerating the dewatering of suspensions and for more rapidly working up industrial waters, effluents and sludges by the addition of a basic water-soluble polymer being produced by reacting (a) an aliphatic polyethylene glycol ether amine and (b) a basic polyamino amide to form an intermediate product and (c) reacting said intermediate with an epihalohydrin, dihaloalkane, glyoxal-bis-acrylamide, bis-acrylamidoacetic acid, acrylamidoglycolic acid or tetraalkyloxyethane.

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