Process for producing modified styrenic polymer beads for high s

Details Process for producing modified styrenic polymer beads for high s Process for producing modified styrenic polymer beads for high s

1985-11-29

1986-11-11

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 56, 521 57, 521 60, 521139, 525242, 526346, 428 35, C08J 918

Patent

active

046223460

ABSTRACT:
Styrenic polymer beads that are useful in forming foamed cups with improved strength and thermal properties are prepared by forming an aqueous suspension of initial styrenic polymer beads and adding thereto an emulsion of a comonomer solution of styrenic monomer and divinylbenzene, which emulsion also contains free-radical-producing catalysts, and the suspension with added monomers is heated to copolymerize the styrenic monomer and divinylbenzene within and on the initial beads and form modified beads.

REFERENCES:
patent: 3259594 (1966-07-01), Wright
patent: 3259595 (1966-07-01), Wright
patent: 3324052 (1967-06-01), Zwern et al.
patent: 3960784 (1976-06-01), Rubens
patent: 4579872 (1986-04-01), Johnson

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