Lubricant for thermoplastic resins and thermoplastic resin compo

Details Lubricant for thermoplastic resins and thermoplastic resin compo Lubricant for thermoplastic resins and thermoplastic resin compo

1986-05-06

1988-03-08

Lieberman, Allan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 71, 525 85, 525309, 525902, C08F26504, C08F26506, C08F25500, C08L 5106

Patent

active

047300248

ABSTRACT:
Disclosed is a lubricant for thermoplastic resins, which is prepared by (A) polymerizing 60-100 wt. % of an aromatic vinyl monomer and 0-40 wt. % of other vinyl monomer copolymerizable therewith to form a polymer, (B) polymerizing 30-70 wt. parts of a monomer or monomer mixture comprising 50-100 wt. % of an acrylic acid ester and 0-50 wt. % of other vinyl monomer or monomers copolymerizable therewith in the presence of 10-60 wt. parts of said polymer so that when said monomer or monomer mixture is singly polymerized, the reduced viscosity of the resulting polymer is lower than 1.0, to obtain a polymer, and (C) polymerizing 5-30 wt. parts of a methacrylic acid ester in the presence of the two-stage polymer obtained at the steps (A) and (B) so that the total amount of the components (A), (B) and (C) is 100 wt. parts. A thermoplastic resin composition comprising this lubricant has an excellent mold release characteristics and lubricating property at the molding step, and a molded article prepared from the composition has a good gloss.

REFERENCES:
patent: 3859384 (1975-01-01), Carty et al.
patent: 3925510 (1975-12-01), Ide et al.
patent: 3971835 (1976-07-01), Myers et al.
patent: 4302845 (1982-12-01), Kamata et al.
patent: 4426493 (1984-01-01), Falk
patent: 4521568 (1985-06-01), Mori et al.

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