Polycarbonate containing compound from bis(3-phenyl-4-hydroxyphe

Details Polycarbonate containing compound from bis(3-phenyl-4-hydroxyphe Polycarbonate containing compound from bis(3-phenyl-4-hydroxyphe

1988-12-21

1990-01-09

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528171, 528174, 528198, 528204, C08G 6362

Patent

active

048929247

ABSTRACT:
A polycarbonate polymer containing repeating units represented by the following general formula ##STR1## wherein: X is selected from single bond, ##STR2## wherein: R.sup.1 and R.sup.2 are each independently selected from hydrogen atom; alkyl radical of 1 to 6 carbon atoms; cycloalkyl radical of 5 to 6 carbon atoms; ##STR3## wherein p is an integer having a value of from 0 to 3; phenyl radicals substituted at para position by a substituent selected from alkoxy radicals of 1 to 5 carbon atoms, phenoxy radicals, or halogen radicals; or p-biphenylyl radical, --CH.sub.2).sub.q wherein q is an integer having a value of from 2 to 10; or ##STR4## wherein r is an integer having a value of from 4 to 8, and having a reduced viscosity [.eta.sp/c] of at least 0.2 dl/g as measured in methylene chloride at a concentration of 0.5 g/dl at 20.degree. C.
Such polycarbonates exhibit excellent optical properties such as high birefringence, and are useful as materials for optical devices.
Also, a process for preparing the polycarbonates and novel dihydric phenols which can be used as materials for the polycarbonates are disclosed.

REFERENCES:
patent: 3422065 (1969-01-01), Wulff et al.
patent: 4465721 (1984-08-01), McAlister

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