Patent · US Expired

Process for the preparation of dihydroxypolyurethanes and the use thereof as adhesives or as raw materials for adhesives

US4240861A · kind A · utility

5Cited by

5References

30Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Walter Meckel · Neuss, DE
Horst Muller-Albrecht · Cologne, DE
Manfred Dollhausen · Odenthal, DE
Eugen Velker

Key dates

Filing date	May 17, 1979
Grant date	Dec 23, 1980
Priority date	—
Expiry date	May 17, 1999

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S528/905
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The instant invention is directed to a process for the preparation of dihydroxypolyurethanes containing carboxyl groups and chemically fixed ionic groups, comprising reacting PA0 (A) dihydroxypolyesters having molecular weights of from 600 to 8,000; PA0 (B) organic diisocyanates; PA0 (C) compounds containing carboxyl groups and groups having a higher isocyanate-reactivity than said carboxyl groups; and PA0 (D) compounds containing ionic groups and isocyanate-reactive groups wherein the products of said process contain from 0.01 to 1.0%, by weight of carboxyl groups and from 0.1 to 10 milliequivalents of ionic groups per 100 g of polyurethane.

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