Rubber modified polystyrene

Details Rubber modified polystyrene Rubber modified polystyrene

1994-12-21

1996-02-13

Michl, Paul R.

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

Synthetic resins

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

525316, 525315, 525314, 525 84, C08L 5104

Patent

active

054911958

ABSTRACT:
High impact polystyrene resins are provided having a surprisingly good combination of toughness and gloss characteristics. Such resins contain small (i.e., 0.1 to 0.4 micron) capsule morphology rubber particles in combination with relatively small (i.e., 0.25 to 1 micron) entanglement morphology rubber particles. It has been found that such resins are capable of providing Izod impact strength values in the range of 2.5 to 3.5 ft-lb/in (133.4 to 186.7 J/m) and higher at an overall volume average rubber size of less than 0.4 micron with corresponding gloss values in excess of 90 percent.

REFERENCES:
patent: 4146589 (1979-03-01), Dupre
patent: 4309515 (1982-01-01), Corley
patent: 4421875 (1983-12-01), McKee et al.
patent: 4493922 (1985-01-01), Echte et al.
patent: 4524180 (1985-06-01), Sun
patent: 4839418 (1989-06-01), Schwaben et al.
patent: 5039714 (1991-08-01), Kasahara et al.

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