Sytrenic polymer resins achieving improved gloss and impact resi

Details Sytrenic polymer resins achieving improved gloss and impact resi Sytrenic polymer resins achieving improved gloss and impact resi

1996-10-08

1997-05-27

Zemel, Irina S.

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

Synthetic resins

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

525 72, 525 98, 525 99, C08L 5104, C08L 5302

Patent

active

056333188

ABSTRACT:
A polystyrene based composition is provided having high impact strength and gloss. The gloss is particularly noted when the resin is molded into plastic articles, especially at relatively cooler temperatures, such as 80.degree. F. to 100.degree. F. The composition contains three resins. The first resin comprises polystyrene and rubber particles smaller than 1.0 micron, such as 0.2 to 0.6 microns. The second resin comprises polystyrene and rubber particles larger than 1.0 micron. The third resin preferably is a block copolymer of styrene and butadiene. Unexpectedly, the third resin improves the gloss achieved by the overall composition.

REFERENCES:
patent: 3879491 (1975-04-01), Lindsey
patent: 4031176 (1977-06-01), Molbert
patent: 4075285 (1978-02-01), Tabana
patent: 4493922 (1985-01-01), Echte
patent: 5039714 (1991-08-01), Kisahara
patent: 5294656 (1994-03-01), Okamoto
patent: 5334658 (1994-08-01), Blumeustern

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