Title:
PRODUCTION OF MALEIMIDE-BASED HEAT-RESISTANT COPOLYMER
Document Type and Number:
Japanese Patent JP3138334
Kind Code:
B2
Abstract:
PURPOSE: To obtain a maleimide based copolymer having simultaneously improved heat resistance and impact resistance by using a specific organic peroxide as a polymerization initiator in copolymerizing a vinyl monomer mixture containing a maleimide-based monomer.
CONSTITUTION: A vinyl monomer mixture containing a maleimide-based monomer (e.g. N-phenylmaleimide) is copolymerized by using an organic peroxide of the formula (R1 and R2 are 1-2C alkyl; R is 1-5C alkyl or phenyl) [e.g. 2,2-bis(4,4-di-t-butylperoxycyclohexyl)propane] as a polymerization initiator preferably at 70-120°C. Suspension polymerization is preferable as the polymerization method. The vinyl monomer mixture preferably comprises 5-90wt.% aromatic vinyl monomer such as styrene, 0-35wt.% vinyl cyanide-based monomer such as acrylonitrile, 5-30wt.% maleimide-based monomer and 0-30wt.% monomer copolymerizable with these monomers.
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Inventors:
Takumi Fukumura
Application Number:
JP19463192A
Publication Date:
February 26, 2001
Filing Date:
June 30, 1992
Export Citation:
Assignee:
Kayaku Akzo Corporation
International Classes:
C08F4/36; C08F4/28; C08F22/36; C08F212/00; C08F222/40; (IPC1-7): C08F4/36; C08F212/00; C08F222/40
Domestic Patent References:
| JP63182309A | ||||
| JP354205A | ||||
| JP232107A | ||||
| JP232108A | ||||
| JP4272909A | ||||
| JP5178920A | ||||
| JP4300907A |
Attorney, Agent or Firm:
Norio Saeki