Transparent astatic resinous articles and method for their produ

Details Transparent astatic resinous articles and method for their produ Transparent astatic resinous articles and method for their produ

1971-06-28

1976-05-25

Pianalto, Bernard D.

Stock material or miscellaneous articles

Composite

Of polycarbonate

427163, 427248, 427337, B29D 1100

Patent

active

039595617

ABSTRACT:
A method for the rapid rendering of transparent polymer articles astatic by treating the articles with dilute gaseous sulfur trioxide followed by treatment with base such as ammonia and water or dilute aqueous ammonia. The articles are rendered permanently astatic without affecting their transparency by this process.

REFERENCES:
patent: 2727831 (1955-12-01), Dixon
patent: 2786780 (1957-03-01), Walles et al.
patent: 2832697 (1958-04-01), Walles
patent: 2832698 (1958-04-01), Walles
patent: 2832699 (1958-04-01), Walles
patent: 2937066 (1960-05-01), Walles
patent: 3578484 (1971-05-01), Walles et al.
patent: 3607350 (1971-09-01), Rathsack
patent: 3625751 (1971-12-01), Walles
patent: 3682786 (1972-08-01), Brown et al.
patent: 3684554 (1972-08-01), Donald et al.

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