EP 0000232 B1 19811209 - PROCESS FOR THE PREPARATION OF BLOCKED POLYISOCYANATES AND BLOCKED POLYISOCYANATES OBTAINABLE THERBY
Title (en)
PROCESS FOR THE PREPARATION OF BLOCKED POLYISOCYANATES AND BLOCKED POLYISOCYANATES OBTAINABLE THERBY
Publication
Application
Priority
DE 2729704 A 19770701
Abstract (en)
[origin: US4200725A] This invention relates to blocked isocyanates and to a method for making blocked isocyanates by blocking the isocyanate groups of a polyisocyanate, which may be chain extended, with a cyclic amidine compound of the formula <IMAGE> where the R's are the same or different substituents inert to isocyanate groups.
IPC 1-7
IPC 8 full level
C07D 233/06 (2006.01)
CPC (source: EP US)
C07D 233/06 (2013.01 - EP US)
Designated contracting state (EPC)
BE CH DE FR GB LU NL
DOCDB simple family (publication)
EP 0000232 A1 19790110; EP 0000232 B1 19811209; DE 2729704 A1 19790111; DE 2861432 D1 19820204; DK 297978 A 19790102; IT 1096841 B 19850826; IT 7825168 A0 19780630; JP S5444670 A 19790409; US 4200725 A 19800429
DOCDB simple family (application)
EP 78200062 A 19780627; DE 2729704 A 19770701; DE 2861432 T 19780627; DK 297978 A 19780630; IT 2516878 A 19780630; JP 7877678 A 19780630; US 92109178 A 19780630