Patent · US Expired

Hydrophobic polyurethane elastomer

US6211324A · kind A · utility

6Cited by

7References

10Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Karl W. Haider · Wexford, US
Jack C. Chan · Peachtree City, US
E. Haakan Jonsson · Dorpsstraat, US
Uli Franz · Solingen, DE

Key dates

Filing date	Jun 8, 1999
Grant date	Apr 3, 2001
Priority date	—
Expiry date	Jun 8, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/10
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A hydrophobic polyurethane elastomer is disclosed comprising an isocyanate terminated prepolymer comprising: i) from 30 to 90 percent by weight of an OH terminated homopolymer of butadiene having molecular weight ranging from 1000 to 4000 and an OH functionality of from 1.9 to 2.1; ii) from 10 to 70 percent by weight of an isocyanate and an asymmetric diol chain extender having a molecular weight ranging from 75 to 200.

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