Patent · US Expired

Incorporating a crosslinked polyamidoamine condensation product into paper-making pulp

US4144123A · kind A · utility

57Cited by

2References

1Claims

0Family size

Assignee

BASF SE

Inventors

Emil Scharf · Ludwigshafen, DE
Rolf Fikentscher · Ludwigshafen, DE
Werner Auhorn · Bischofswerda, DE
Werner Streit · Worms, DE

Key dates

Filing date	Apr 25, 1978
Grant date	Mar 13, 1979
Priority date	—
Expiry date	Apr 25, 1998

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H21/10
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Crosslinked water-soluble reaction products for the papermaking industry obtained by reacting PA1 (a) 1 part by weight of a polyamidoamine obtained by condensation of 1 mole of a dicarboxylic acid with from 0.8 to 1.4 moles of a polyalkylenepolyamine such as diethylenetriamine, up to 8 ethyleneimine units per basic nitrogen atom being optionally grafted onto the condensation product, with PA1 (b) from 0.3 to 2 parts by weight of a reaction product of a polyalkylene oxide having from 8 to 100 alkylene oxide units with epichlorohydrin, In aqueous solution at a temperature of from 20.degree. to 100.degree. C., the solution having a solids content of from 5 to 50% by weight. The viscosity of an aqueous solution containing 20% of the reaction product is from 300 to 2,500 centipoises at 20.degree.C.

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