Patent · US Expired

Stabilizer-containing reactive components for pu-foams, new stabilizers and a process for producing these stabilizers

US4608399A · kind A · utility

4Cited by

16References

3Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hans-Josef Buysch · Krefeld, DE
Hans-Walter Illger · Rösrath, DE
Karl-Heinz Dorner · Pulheim, DE

Key dates

Filing date	Oct 18, 1985
Grant date	Aug 26, 1986
Priority date	—
Expiry date	Oct 18, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2375/04
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to stabilizer-containing reactive components for the production of polyurethane foams having little or no tendency towards core discoloration which are characterized by a stabilizing addition of monomeric and/or oligomeric derivatives of the diphenylamine series, including the phenothiazine series. The invention also relates to new stabilizers of the diphenylamine and/or phenothiazine series and to a process for their production, characterized in that aromatic amines of the diphenylamine and/or phenothiazine series are reacted with bifunctional halogen derivatives, diols, bis-ethers or bis-esters or with bis-olefins formed therefrom at elevated temperatures in the presence of strong acids and the amines are optionally further alkylated.

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