Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1985-02-14
1986-09-23
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C08L 904
Patent
active
046136509
ABSTRACT:
A copolymer latex is produced by the emulsion polymerization of 20 to 50% by weight of a conjugated diolefin, 15 to 50% by weight of an aromatic vinyl compound, 0 to 25% by weight of a vinyl cyanide, 5 to 40% by weight of an alkyl ester of an unsaturated carboxylic acid, and 0.5 to 10% by weight of an ethylenically unsaturated acid. First, a monomeric mixture composed of the entire aromatic vinyl compound, the entire vinyl cyanide, at least a part of the conjugated diolefin and at least a part of the ethylenically unsaturated acid, and optionally at least a part of the alkyl ester of an unsaturated carboxylic acid, the amount of the monomeric mixture being 55 to 95% by weight based on the weight of all the monomers used in the process, is polymerized in emulsion. Then, the remainder of the monomers which amounts to 5 to 45% by weight of the weight of all the monomers is added to the above polymerization system and the mixture is polymerized in emulsion.
REFERENCES:
patent: 2791571 (1957-05-01), Wheelock et al.
patent: 2862907 (1958-12-01), Stein et al.
patent: 4381365 (1983-04-01), Mishiba et al.
Ishizuka Toshiro
Maeda Daiharu
Miyamoto Kenzo
Sekiya Masayoshi
Shimazoe Takahiro
Nippon Zeon Co. Ltd.
Sarofim N.
Schofer Joseph L.
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