Patent · US Expired

Process for the preparation of polyurethane elastomers using diols of the anhydro-tetritol series

US4476253A · kind A · utility

2Cited by

1References

8Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Herbert Salzburg · Leichlingen, DE
Holger Meyborg · Odenthal, DE
Wilhelm Goyert · Leverkusen, DE
James-Michael Barnes · Breitscheid, DE

Key dates

Filing date	Jan 11, 1984
Grant date	Oct 9, 1984
Priority date	—
Expiry date	Jan 11, 2004

Classification

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

Abstract

Polyurethane elastomers are made by reacting organic polyisocyanates with compounds having at least two groups containing isocyanate-reactive hydrogen atoms and a molecular weight of from 400 to 10,000 and a 1,4-monoanhydro-tetritol in accordance with techniques known to those in the art. Known chain-lengthening agents, auxiliaries and additives may be included in the reaction mixture. The reaction mixtures employed in the process of the present invention have a longer pot life than prior art reaction mixtures. The elastomers produced by this process are shrink stable.

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