Patent · US Expired

Mixtures leading to hard polyurethane foamed materials

US5869546A · kind A · utility

20Cited by

4References

10Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Peter Gruss · Göttingen, DE
Manfred Kapps · Bensberg, DE
Peter Vehlewald · Leichlingen, DE
Rainer Rettig · Amagasaki, JP

Key dates

Filing date	Sep 20, 1996
Grant date	Feb 9, 1999
Priority date	—
Expiry date	Sep 20, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2375/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Mixtures leading to hard polyurethane foamed materials, which mixtures are preferably present in a pressure vessel, contain PA0 a) prepolymers containing isocyanate groups, obtainable by the reaction of polyisocyanates containing isocyanurate groups and optionally urethane groups with compounds having at least two hydrogen atoms which are reactive to isocyanates and having a molecular weight of 62 to 10,000, wherein the content of monomeric polyisocyanate in the prepolymer is less than 2 weight %, PA0 b) auxiliary process materials and additives known in the art, and PA0 c) foaming agents having a boiling point less than 0.degree. C./760 mm Hg.

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