Patent · US Expired

Surface-active copolymers and their use for the production of polyurethane powders

US5071923A · kind A · utility

1Cited by

6References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Tillmann Hassel · Cologne, DE
Hanns P. Muller · Leverkusen, DE
Hugo Vernaleken · Walsrode, DE
Helmut Kipphardt · Cologne, DE
Rolf Dhein · Krefeld, DE

Key dates

Filing date	Aug 10, 1990
Grant date	Dec 10, 1991
Priority date	—
Expiry date	Aug 10, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F290/06
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention is directed to novel surface active copolymers and the use thereof in the production of polyurethane powders. More particularly, the copolymers comprise have a substantially linear structure and are obtained by copolymerization of PA1 A) a partial reaction product of PA2 1) (meth)acrylic acid or a derivative thereof and PA2 2) a macromolecular compound substituted by at least two functional groups selected from OH and NH.sub.2, the functional groups not reacted with Al) being irreversibly blocked, with PA1 B) a urethane of 1) a long-chain alkyl isocyanate and 2) a hydroxyalkyl (meth)acrylate.

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