Heat treatment of resinous block copolymer to improve clarity

Details Heat treatment of resinous block copolymer to improve clarity Heat treatment of resinous block copolymer to improve clarity

1976-02-23

1978-01-10

Thurlow, Jeffrey R.

Plastic and nonmetallic article shaping or treating: processes

Flame contact or reshaping by heat decomposition of work

260 237R, 260879, 260880R, 264176R, 264234, 264235, 264319, 264345, B29C 2500, B29F 500

Patent

active

040679420

ABSTRACT:
Extruded articles of resinous transparent monovinyl-substituted aromatic compound/conjugated diene block copolymer are subjected to a brief heat treatment which results in a substantial improvement in clarity.

REFERENCES:
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patent: 3281383 (1966-10-01), Zelinski et al.
patent: 3301935 (1967-01-01), Stoeckhert
patent: 3397263 (1968-08-01), Werner
patent: 3555135 (1971-01-01), Paul
patent: 3639517 (1972-02-01), Kitchen et al.
patent: 3651181 (1972-03-01), Ramaika
patent: 3655848 (1972-04-01), Young et al.
patent: 3851039 (1974-11-01), Blackwelder

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