Patent · US Expired

Isocyanate addition products and a process for their production

US4623672A · kind A · utility

3Cited by

5References

19Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Roland Kleinstuck · Bensberg, DE
Rolf Wiedermann · Bensberg, DE

Key dates

Filing date	Aug 5, 1985
Grant date	Nov 18, 1986
Priority date	—
Expiry date	Aug 5, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S521/906
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Flame retardant isocyanate addition products are made by reacting an isocyanate with a compound selected from the group consisting of 1-phosphonoethane-2-carboxylic acid-tri-C.sub.1 -C.sub.4 -alkyl esters, 1-phosphonopropane-2-carboxylic acid-tri-C.sub.1 -C.sub.4 -alkyl esters and mixtures thereof. Known isocyanate-reactive compounds, blowing agents, catalysts, additives and auxiliary agents may optionally be included in the reaction mixture. These flame retardant products are useful in construction applications such as insulation panels for roof insulation.

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