Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1974-04-30
1976-01-06
Schofer, Joseph L.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 855F, C08F22044
Patent
active
039311287
ABSTRACT:
A process for preparing a copolymer of acrylonitrile and an aromatic vinyl compound such as styrene having a well-balanced combination of color, transparency and softening point by suspension polymerization in the presence of about 0.01 to 0.5% of an azo-type catalyst and about 0.005 to 0.2% of an organic peroxide catalyst free from a benzene ring, both based on the weight of the monomers where the polymerization is carried out at a temperature of 90.degree. to 110.degree.C until a monomer conversion of about 70% is obtained, and when the monomer conversion exceeds 70%, the polymerization is carried out at a temperature of 110.degree. to 140.degree.C.
REFERENCES:
patent: 2658057 (1953-11-01), Park
patent: 3032540 (1962-05-01), Ross et al.
patent: 3198775 (1965-08-01), Delacretaz
patent: 3738972 (1973-06-01), Moriyama et al.
patent: 3763128 (1973-10-01), Lewis et al.
Hisashige Mitsuto
Takizawa Hidehiko
Denki Kagaku Kogyo Kabushiki Kaisha
Schofer Joseph L.
Tungol Maria S.
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