EP 0000161 B1 19810520 - PROCESS FOR REDUCING THE AMOUNT OF RESIDUAL MONOMERS DURING THE POLYMERISATION OF VINYL LACTAMS AND VINYL ESTERS
Title (en)
PROCESS FOR REDUCING THE AMOUNT OF RESIDUAL MONOMERS DURING THE POLYMERISATION OF VINYL LACTAMS AND VINYL ESTERS
Publication
Application
Priority
DE 2730017 A 19770702
Abstract (en)
[origin: US4182851A] A process for reducing the residual monomer content of a copolymer prepared by copolymerizing vinyl esters and N-vinyl-lactams in a solvent in the presence of a free radical polymerization initiator. Following the main polymerization, from 0.05 to 0.5% by weight, based on the monomers employed, of di-tert.-butyl peroxide, di-tert.-amyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-bis-(tert.-butylperoxy)-hexane, 2,2-bis-(tert.-butylperoxy)-butane, 1,1-bis-(tert.-butylperoxy)-3,3,5-trimethylcyclohexane, 4,4-di-(tert.-butylperoxy)-butyl valerate, or a mixture of these, is added to the reaction mixture and the after-polymerization is carried out at a higher temperature than the main polymerization.
IPC 1-7
IPC 8 full level
C08F 2/00 (2006.01); C08F 2/04 (2006.01); C08F 4/00 (2006.01); C08F 4/28 (2006.01); C08F 4/32 (2006.01); C08F 6/00 (2006.01); C08F 6/06 (2006.01); C08F 6/10 (2006.01); C08F 26/00 (2006.01); C08F 26/06 (2006.01); C08F 26/10 (2006.01); C08F 218/00 (2006.01); C08F 218/02 (2006.01); C08F 218/08 (2006.01); C08F 226/10 (2006.01); C08F 263/02 (2006.01); C08F 271/00 (2006.01); C08F 218/04 (2006.01); C08F 226/06 (2006.01)
CPC (source: EP US)
C08F 263/02 (2013.01 - EP US); C08F 271/00 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0000161 A1 19790110; EP 0000161 B1 19810520; DE 2730017 A1 19790118; DE 2860710 D1 19810827; JP S5414492 A 19790202; JP S6059923 B2 19851227; US 4182851 A 19800108
DOCDB simple family (application)
EP 78100179 A 19780616; DE 2730017 A 19770702; DE 2860710 T 19780616; JP 7877878 A 19780630; US 91944978 A 19780627