Patent · US Expired

Storage-stable, liquid polyisocyanates possessing carbodiimide groups, and process for their manufacture

US4120884A · kind A · utility

17Cited by

1References

8Claims

0Family size

Assignee

BASF SE

Inventors

Frank P. Woerner · Monsheim, DE
Peter T. Kan · Plymouth, US
Georg Falkenstein

Key dates

Filing date	Jan 28, 1977
Grant date	Oct 17, 1978
Priority date	—
Expiry date	Jan 28, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/797
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Storage-stable, liquid, only slightly colored polyisocyanates possessing carbodiimide groups and having an isocyanate content of from about 25 to 35% by weight, based on total weight; these products are obtained by condensing polyisocyanates in the presence of phospholines, phospholidines and/or their oxides, and stopping the condensation and stabilizing the condensation products with the Lewis acids, aromatic carboxylic acid halides, aromatic sulfonic acid esters and/or alkyl sulfates.

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