Patent · US Expired

Process for the manufacture of allophanates having isocyanate groups

US5917083A · kind A · utility

19Cited by

2References

16Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Klaus Konig · Leverkusen, DE
Helmut Reiff
Christian Wamprecht · Neuss, DE
Harro Traubel · Leverkusen, DE

Key dates

Filing date	Aug 8, 1997
Grant date	Jun 29, 1999
Priority date	—
Expiry date	Aug 8, 2017

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/7837
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for preparing an isocyanate group-containing allophanate corresponding to formula (I) ##STR1## wherein R represents the residue obtained by removing the isocyanate groups from a (cyclo)aliphatic or araliphatic diisocyanate, PA1 Y represents the represents an m-valent residue obtained by removing the hydroxyl groups from a (poly)hydroxyl compound having m OH groups and PA1 n and m are the same or different and have a value of 1 to 5, by reacting an isocyanate group-containing oxadiazinetrione with a primary alcohol in the presence of a basic catalyst having a pKa value of >6.

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