Patent · US Expired

Binder combinations and a process for the production of flat materials

US4945137A · kind A · utility

2Cited by

2References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Walter Schafer · Leichlingen, DE
Hans Rudolph · Krefeld, DE
Rolf Dhein · Krefeld, DE
Hanns P. Muller · Leverkusen, DE
Michael Sonntag · Odenthal, DE
Christian Wamprecht · Neuss, DE
Harald Blum · Wachtendonk, DE
Walter Krauss · Starnberg, DE

Key dates

Filing date	Oct 2, 1989
Grant date	Jul 31, 1990
Priority date	—
Expiry date	Oct 2, 2009

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K5/353
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A binder for a coating composition is a combination of PA0 (a) polymers containing intramolecular carboxylic anhydride groups and having an average molecular weight of from 500 to 25,000 and PA0 (b) organic compounds containing 4,5-dihydrooxazole groups in a quantity corresponding to an equivalent ratio of carboxylic anhydride groups to 4,5-dihydrooxazole groups of from 0.5:1 to 2:1, and contains from 0.005 to 5% by weight, based on the weight of components (a) and (b), of ammonia, a primary amine or secondary amine.

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