Patent · US Expired

Process for the production of polyisocyanates with a biuret structure

US3976622A · kind A · utility

27Cited by

4References

5Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Kuno Wagner · Leverkusen, DE
Johannes Eimer
Joachim Zirner
Rainer Raab
Dietrich Liebsch · Leverkusen, DE

Key dates

Filing date	May 19, 1975
Grant date	Aug 24, 1976
Priority date	—
Expiry date	May 19, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/7831
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Comparatively low viscosity biuret containing polyisocyanates are produced by reacting diisocyanates and biuretizing agents in proportions corresponding to a molar ratio of diisocyanate to monofunctional biuretizing agent of at least 11 : 1.

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