Title:
PRODUCTION OF FOAMABLE STYRENIC RESIN PARTICLE
Document Type and Number:
Japanese Patent JP3399065
Kind Code:
B2
Abstract:
PURPOSE: To obtain the subject resin particles having excellent fusion bonding properties during molding, a low content of remaining monomers and slight blocking by subjecting a styrenic monomer or the monomer and a comonomer using a peroxy ketal as a polymerization initiator to suspension polymerization and then, adding a blowing agent.
CONSTITUTION: These formable styrenic resin particles having a low content of remaining monomers, slight blocking and excellent fusion bonding properties during molding are obtained by subjecting a styrenic monomer (e.g. styrene) or a mixture of the styrenic monomer and another copolymerizable vinyl monomer (e.g. methyl methacrylate) to suspension polymerization by using a peroxy ketal of the formula (R is a 1-5C alkyl)(e.g. 1,1-di-t-butylperoxy-2- methylcyclohexane) as a polymerization initiator in the presence of sodium dodecylbenzenesulfonate in an aqueous medium, cooling the reaction mixture, adding a blowing agent (e.g. n-pentane), further heating and expanding.
Inventors:
Shuji Suyama
Hideyo Ishigaki
Hiroshi Okada
Hideyo Ishigaki
Hiroshi Okada
Application Number:
JP33901693A
Publication Date:
April 21, 2003
Filing Date:
December 03, 1993
Export Citation:
Assignee:
Nippon Oil & Fat Co., Ltd.
International Classes:
C08J9/20; C08F2/18; C08F4/28; C08F4/36; C08F12/00; C08J9/16; C08K5/10; C08K5/14; C08L25/08; (IPC1-7): C08J9/16
Domestic Patent References:
| JP5872155A |
Attorney, Agent or Firm:
Fukuda Takemichi (2 outside)