Expandable rubber-modified styrene resin beads, expanded beads t

Details Expandable rubber-modified styrene resin beads, expanded beads t Expandable rubber-modified styrene resin beads, expanded beads t

1995-12-21

1997-08-26

Lee, Helen

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 60, 521139, 521146, 4283044, C08J 916, C08J 918

Patent

active

056611919

ABSTRACT:
Expandable rubber-modified styrene resin beads, expanded rubber-modified styrene resin beads, and expanded molded rubber-modified styrene resin articles are described. The expandable beads comprise a rubber-modified styrene resin comprising a styrene resin having dispersed therein 8 to 15% by weight of conjugated diene rubber particles having a 1,4-cis structure in a proportion of not less than 70% and an average particle size of 1.5 to 3.0 .mu.m, the rubber-modified styrene resin having a mineral oil content of not more than 3.0% by weight, and the expandable rubber-modified styrene resin beads containing 1 to 15% by weight of a volatile blowing agent. The expanded molded article has excellent appearance, impact resistance and softness.

REFERENCES:
patent: 4282334 (1981-08-01), Walter et al.
patent: 4307134 (1981-12-01), Milkovich et al.
patent: 4333970 (1982-06-01), Blommers et al.
patent: 4363881 (1982-12-01), Smith
patent: 4409338 (1983-10-01), DiGiulio
patent: 4692471 (1987-09-01), Fudge
patent: 4937272 (1990-06-01), Sumitomo

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