Patent · US Expired

Process for the production of colored polyurethane foams

US3994835A · kind A · utility

27Cited by

3References

8Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Karlheinz Wolf · Leverkusen, DE
Konrad Nonn
Reinhold Hornle
Hans Unterbirker
Jurgen Koerner

Key dates

Filing date	Dec 5, 1973
Grant date	Nov 30, 1976
Priority date	—
Expiry date	Dec 5, 1993

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/3836
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Dispersions of dyestuffs which contain at least one free amino or hydroxyl group capable of reacting with isocyanates under the conditions of polyaddition and liquids in which the dyes are soluble to an extent less than 2 % are suitable for the production of colored polyurethane foams. The dye dispersions can be added before or during the polyaddition reaction.

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