Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1989-03-28
1991-10-08
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525165, 525199, 525227, 525237, 525238, 525239, 525241, C08F26506, C08L 2504, C08L 2706, C08L 5502
Patent
active
050555294
ABSTRACT:
A processing aid for a thermoplastic resin is disclosed, which is a two-stage polymer obtained by polymerizing (B) 5 to 50 parts by weight of a monomer or monomer mixture composed mainly of methyl methacrylate in the presence of (A) 50 to 95 parts by weight of a polymer comprising 100 to 50% by weight of units of a methacrylic acid ester other than methyl methacrylate and 0 to 50% by weight of units of other monomer copolymerizable with the methacrylic acid ester and having a reduced viscosity .eta.sp/C not larger than 2.0 dl/g, so that the total amount of the components (A) and (B) is 100 parts by weight and the reduced viscosity .eta.sp of the final polymer is not larger than 2.0 dl/g. A thermoplastic resin having the processing aid incorporated therein has an improved shaping processability, and a shaped article mode therefrom has good surface characteristics.
REFERENCES:
patent: 3251904 (1966-05-01), Souder et al.
patent: 3925510 (1975-12-01), Ide et al.
WPIL, File Supplier, Accession No. 88-158470, Derwent Publications Ltd., London, GB; & JP-A-63 099 263 (Mitsubishi Rayon) 30-04-1988, Whole Abstract.
Kaneda Masahiro
Kishida Kazuo
Kitai Kiyokazu
Okano Kenji
Bleutge John C.
Jagannathan Vasu S.
Mitsubishi Rayon Company Ltd.
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