Heat resistant molding compounds

Details Heat resistant molding compounds Heat resistant molding compounds

1987-04-06

1988-06-28

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263292, C08F 200, C08F 2044

Patent

active

047540087

ABSTRACT:
A method for making thermostable methyl methacrylate/alpha-methylstyrene copolymers having a high heat distortion temperature and adaptable to use as molding compounds by emulsion polymerization of these monomers together with lower alkyl acrylates and/or styrene, the water phase being less than 70 weight percent of the total monomer/water components and the amount of emulsifier being less than 0.5 weight percent of the water component, the copolymer being isolated by freeze coagulation or extruder pinch-off.

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patent: 3135723 (1964-06-01), Vandegaer
patent: 3969297 (1976-07-01), Tear et al.
patent: 4001484 (1977-01-01), Song
patent: 4086410 (1978-04-01), Song
C.A. 65 2373a (1966).
Methoden der Organischen Chemie XIV II, pp. 145 and 1048-1053.
Ullmanns Enzyklopaedie der Technishcen Chemie, 4th Ed., vol. 13, p. 601; vol. 15, p. 191; vol. 19, pp. 132-134.

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