04173600 is referenced by 14 patents and cites 1 patents.

A multi-stage sequentially produced polymer structure composition, comprising: an innermost layer (A), and successively seed polymerized thereupon an elastic polymer layer (B), an outermost layer (C) and at least one intermediate layer (D), said layer (A) which has a glass transition temperature (Tg) of at least 10.degree. C. and which constitutes 5-35% by weight of the total polymer composition being the polymerized product of a monomer mixture comprising 51-100 parts by weight of styrene or a styrene derivative, 0-49 parts by weight of a monomer having a copolymerizable double bond, 0-10 parts by weight of a polyfunctional monomer, and 0-5 parts by weight of a graft crosslinking agent; said layer (B) which has a glass transition temperature of 0.degree. C. or less and which constitutes 5-55% by weight of the total polymer composition being the product, polymerized in the presence of a product containing the previously polymerized stages, of a monomer mixture comprising 60-100 parts by weight of a diene monomer, 0-40 parts by weight of a monomer having a copolymerizable double bond, 0-10 parts by weight of a polyfunctional monomer and 0-5 parts by weight of a graft crosslinking agent; said layer (C) which has a glass transition temperature of at least 50.degree. C. and which constitutes 10-70% by weight of the total polymer composition being the product, polymerized in the presence of a product containing the previously polymerized stages, of a monomer mixture comprising 51-100 parts by weight of styrene or a styrene derivative and 0-49 parts by weight of a monomer having a copolymerizable double bond; and said intermediate layer (D) which constitutes 5-45% by weight of the total polymer composition being the product, polymerized in the presence of a product containing the previously polymerized stages, of a monomer mixture comprising 20 to (Y-10) parts by weight of styrene or a styrene derivative, (Y-10) to 20 parts by weight of a diene monomer, 0-10 parts by weight of a polyfunctional monomer and 0-5 parts by weight of a graft crosslinking agent, wherein Y is the amount of diene monomer used in the formation of said layer (B).

Title
Multi-stage sequentially produced polymer composition
Application Number
807642
Publication Number
4173600
Application Date
November 27, 1978
Publication Date
November 6, 1979
Inventor
Hiroshi Mohri
Yokohama
JP
Akira Hasegawa
Otake
JP
Kazuo Kishida
Otake
JP
Agent
Oblon Fisher Spivak McClelland & Maier
Assignee
Mitsubishi Rayon Co
JP
IPC
C08F 279/02
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