Global Patent Index - EP 1015499 A1

EP 1015499 A1 2000-07-05 - METHOD FOR PRODUCING POLYMETHACRYLATE PARTICLES BY EMULSION POLYMERIZATION

Title (en)

METHOD FOR PRODUCING POLYMETHACRYLATE PARTICLES BY EMULSION POLYMERIZATION

Title (de)

VERFAHREN ZUR HERSTELLUNG VON POLYMETHACRYLATTEILCHEN DURCH EMULSIONSPOLYMERISATION

Title (fr)

PROCEDE DE PRODUCTION DE PARTICULES DE POLYMETHACRYLATE PAR POLYMERISATION PAR EMULSION

Publication

EP 1015499 A1 (DE)

Application

EP 98941412 A

Priority

  • DE 19738652 A
  • EP 9805092 W

Abstract (en)

[origin: DE19738652A1] The invention relates to a method for producing plastic particles with a size ranging from 2 to 30 mu m by emulsion polymerization in a mixture consisting of: a) 10-60 wt. % vinyl polymerizable monomers, wherein the proportion of water-insoluble monomers must be at least 80 wt. % in relation to the (a monomers used; b) 90-33 wt. % of a solvent mixture, consisting of at least 90 wt. % H2O; c) 0.01-2 wt. % of a polymerization initiation agent with a water solubility of at least 1 %; d) 0.05 to 5 wt. % emulgator. The invention is characterized in that a graft copolymer is used as emulgator, which consists of at least 90 wt. % water-insoluble and water-soluble (meth)acrylate monomers, wherein the methacrylate monomers and the acrylate monomers must be present in a minimal proportion of 20 wt. % and the proportion of the water-soluble (meth)acrylate monomers ranges from 5 to 80 wt. %.

IPC 1-7 (main, further and additional classification)

C08F 2/24; C08F 290/04

IPC 8 full level (invention and additional information)

C08F 2/24 (2006.01); C08F 2/30 (2006.01); C08F 290/04 (2006.01)

CPC (invention and additional information)

C08F 290/046 (2013.01); C08F 2/24 (2013.01)

Citation (search report)

See references of WO 9911673A1

Designated contracting state (EPC)

BE DE FR GB IT NL

EPO simple patent family

DE 19738652 A1 19990311; AU 8979098 A 19990322; EP 1015499 A1 20000705; WO 9911673 A1 19990311

INPADOC legal status


2001-01-17 [18W] WITHDRAWN

- Date of withdrawal: 20001116

2000-07-26 [R17P] REQUEST FOR EXAMINATION FILED (CORRECTION)

- Effective date: 20000306

2000-07-12 [D17P] REQUEST FOR EXAMINATION FILED (DELETED)

2000-07-05 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000306

2000-07-05 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE FR GB IT NL