Global Patent Index - EP 1034201 A1

EP 1034201 A1 2000-09-13 - 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

EP 1034201 A1 (DE)

Application

EP 98961146 A

Priority

  • DE 19752394 A
  • EP 9807097 W

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 (main, further and additional classification)

C08F 279/02; C08F 4/00; C08F 265/04

IPC 8 full level (invention and additional information)

C08F 4/00 (2006.01); C08F 265/04 (2006.01); C08F 279/02 (2006.01)

CPC (invention and additional information)

C08F 265/04 (2013.01); C08F 279/02 (2013.01)

Combination set (CPC)

  1. C08F 265/04 + C08F 212/06
  2. C08F 279/02 + C08F 212/06

Citation (search report)

See references of WO 9925749A1

Designated contracting state (EPC)

BE DE ES GB NL

EPO simple patent family

DE 19752394 A1 19990520; EP 1034201 A1 20000913; WO 9925749 A1 19990527

INPADOC legal status


2003-12-03 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030703

2000-09-13 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000518

2000-09-13 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE ES GB NL