Patent · US Expired

Concentrated aqueous solutions of mixtures of organic complexing agents and dispersing agents based on polymeric aliphatic carboxylic acids

US4474916A · kind A · utility

7Cited by

3References

2Claims

0Family size

Assignee

BASF SE

Inventors

Werner Streit · Worms, DE
Wolfram Bergold · Heidelberg, DE
Dieter Bassing · Ludwigshafen, DE

Key dates

Filing date	Jul 21, 1983
Grant date	Oct 2, 1984
Priority date	—
Expiry date	Jul 21, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2333/02
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Aqueous solutions comprising 25 to 60 percent by weight of mixtures of PA0 (a) polymers of acrylic acid and/or copolymers of acrylic acid with maleic acid and PA0 (b) aminopolycarboxylic acids, aminopolyphosphonic acids and/or hydroxyalkanepolyphosphonic acids, PA0 such solutions having a pH value of about 3 to about 7 with the acid groups being present 20 to 80 percent in the form of the potassium salts and the remaining acid groups being present in form of the free acid, the amine salt, or mixtures thereof.

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