EP 1034201 A1 20000913 - METHOD FOR PRODUCING GRAFT POLYMERS
Title (en)
METHOD FOR PRODUCING GRAFT POLYMERS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON PFROPFPOLYMERISATEN
Title (fr)
PROCEDE DE PRODUCTION DE POLYMERES GREFFES
Publication
Application
Priority
- DE 19752394 A 19971119
- EP 9807097 W 19981106
Abstract (en)
[origin: DE19752394A1] Graft copolymers are obtained by an aqueous- phase process in which polymerization of the rubber-elastic base is taken to completion and an N-oxyl radical compound of a sec. amine with no hydrogens on the alpha -carbon atom is added before and/or during polymerization of the grafted shell. A process for the production, in the aqueous phase, of graft copolymers (A) of (a1) 30-95 wt% rubber-elastic graft base derived from (a11) 50-100 wt% conjugated diene and (a12) 0-50 wt% other monounsaturated monomer(s) or from (a11 asterisk ) 50-100 wt% 1-10C alkyl acrylate, (a12 asterisk ) 0-10 wt% polyfunctional crosslinking monomer and (a13 asterisk ) 0-40 wt% other monounsaturated monomer(s) and (a2) 5-70 wt% grafted shell derived from (a21) 50-100 wt% styrene compound of formula (S): R<1>, R<2> = H or 1-8 C alkyl (a22) 0-40 wt% (meth)acrylonitrile and (a23) 0-40 wt% other monounsaturated monomer(s). In this process, polymerization of the base stage (a1) is taken to completion and then at least one N-oxyl radical compound of a sec. amine with no hydrogen atoms on the alpha -carbon atom is added before and/or during polymerization stage (a2). An Independent claim is also included for graft copolymers obtained by this process.
IPC 1-7
IPC 8 full level
C08F 4/00 (2006.01); C08F 265/04 (2006.01); C08F 279/02 (2006.01)
CPC (source: EP KR)
C08F 265/04 (2013.01 - EP KR); C08F 279/02 (2013.01 - EP KR)
Citation (search report)
See references of WO 9925749A1
Designated contracting state (EPC)
BE DE ES GB NL
DOCDB simple family (publication)
DE 19752394 A1 19990520; EP 1034201 A1 20000913; KR 20010032225 A 20010416; WO 9925749 A1 19990527
DOCDB simple family (application)
DE 19752394 A 19971119; EP 9807097 W 19981106; EP 98961146 A 19981106; KR 20007005426 A 20000518