Patent · US Expired

Rigid hydrophobic polyurethanes

US6075064A · kind A · utility

8Cited by

5References

13Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hanns P. Muller · Leverkusen, DE
Kirkor Sirinyan · Bensberg, DE
Manfred Kapps · Bensberg, DE

Key dates

Filing date	Apr 29, 1994
Grant date	Jun 13, 2000
Priority date	—
Expiry date	Apr 29, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2110/0083
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Rigid polyurethanes are obtained by reacting (1) a polyisocyanate with (2) a polyol mixture made up of PA1 (a) an OH-functional polyester based on a C.sub.9-22 fatty acid with a molecular weight of from about 260 to about 2,000, PA1 (b) a non-functional oligomeric polyolefin with a molecular weight of from about 700 to about 6,000 and optionally PA1 (c) an at least difunctional polyol and/or polyamine with a molecular weight of from about 62 to about 8,000 (preferably from about 62 to about 400) which is different from (a), optionally in the presence of (3) a blowing agent such as water and (4) an auxiliary agent and/or additive of the type typically used in polyurethane chemistry.

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