Patent · US Expired

Process for the standardization and stabilization of organic polyisocyanates and the stable products of this process

US5342881A · kind A · utility

8Cited by

3References

15Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hanns P. Muller · Leverkusen, DE
Hans-Joachim Scholl · Cologne, DE
Manfred Kapps · Bensberg, DE

Key dates

Filing date	May 20, 1993
Grant date	Aug 30, 1994
Priority date	—
Expiry date	May 20, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2115/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A new process for the standardization and stabilization with simultaneous increase of reactivity of organic polyisocyanates and the polyisocyanates produced by this process. A polyisocyanate is mixed with compounds having at least one epoxide group which are represented by a specified formula. This mixture is then stabilized with a silylating agent and/or alkylating agent represented by specified formula. The polyisocyanate/epoxide mixture may optionally be heated before the stabilizing agents are added. These polyisocyanates are useful in the production of polyisocyanate addition products.

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