Polycarbonate resin from bis(hydroxy benzoyl oxy-tetra oxa spiro

Details Polycarbonate resin from bis(hydroxy benzoyl oxy-tetra oxa spiro Polycarbonate resin from bis(hydroxy benzoyl oxy-tetra oxa spiro

1990-02-15

1991-06-04

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528171, 528174, 528176, 528179, 528182, 528191, 528193, 528199, 528202, 528204, 528206, C08G 6404

Patent

active

050215418

ABSTRACT:
A polycarbonate resin comprising either a structural unit derived from a spiro ring-containing dihydric phenol, or such a structural unit and a structural unit derived from a dihydric phenol, and a process for producing the same. The polycarbonate resin has excellent flowability and moldability, and also improved optical properties (low refractive index, large Abbe number, etc.), and can be advantageously used in various fields, e.g., as a material for molded articles for optical use and other precision molded articles.

REFERENCES:
patent: 4736016 (1988-04-01), Brunelle et al.

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