Polycarbonate having improved critical thickness

Details Polycarbonate having improved critical thickness Polycarbonate having improved critical thickness

1980-08-14

1984-05-15

Pertilla, Theodore E.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528171, 528174, 528199, 528202, 528204, C08G 802, C08G 6362

Patent

active

044489501

ABSTRACT:
Polycarbonates are provided having improved critical thickness values based on an aromatic diphenol preferably bisphenol A and an aromatic diphenol thioether. By incorporating 2 up to 20 mole percent of the aromatic diphenol thioether based on the total diphenol content into the polymer, the critical thickness of the article molded from the polycarbonate is substantially improved.

REFERENCES:
patent: 3023101 (1962-02-01), Ossenbrunner
patent: 3250744 (1966-05-01), Schnell et al.
patent: 3398212 (1968-08-01), Jackson et al.
patent: 3437631 (1969-04-01), Cleveland
O. V. Shirnova et al., Polycarbonates & Mixed Polycarbonates Based on Di-(4-Hydroxyphenyl)Sulphide, 1968, (pp. 111-118), D. I. Mendeleyev Moscow Chemical and Technological Institute.

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