Patent · US Expired

Process for the production of molded polyurethane parts

US4772639A · kind A · utility

15Cited by

7References

16Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Friedhelm Pilger · Cologne, DE
Ulrich Knipp · Bensberg, DE
Reinhard Halpaap · Odenthal, DE

Key dates

Filing date	Jan 11, 1988
Grant date	Sep 20, 1988
Priority date	—
Expiry date	Jan 11, 2008

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2120/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention is directed to a process for the production of light-resistant, optionally foamed elastomeric molded polyurethanes by reacting PA1 (a) organic polyisocyanates which are either mixtures of isophorone diisocyanate with polyisocyanates containing isocyanurate groups and based on 1,6-diisocyanatohexane or mixtures of IPDI with polyisocyanates containing isocyanurate groups and based on 1,6-diisocyanato-hexane and IPDI with organic compounds containing isocyanate-reactive groups in the presence of catalysts, wherein the components are reacted together inside closed molds in an isocyanate index of about 70 to 130. The present invention is additionally directed to the elastomeric polyurethanes prepared by this process.

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