Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1997-08-26
1999-11-23
Merriam, Andrew E. C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
523106, 528183, 528210, 528347, 528353, 524606, 525534, C08G 6300, C08G 6926
Patent
active
059902612
ABSTRACT:
A low birefringent organic optical component prepared from a resin consisting essentially of one or more repetitive structural units selected from the group consisting of structures represented by general formula (1); ##STR1## wherein A is either of the groups below. ##STR2## The organic optical component can exhibit excellent transparency, heat resistance and mechanical strength as well as a low birefringence. Also provided is a novel aromatic polyamide with a low permitivity and excellent transparency, processability and thermal stability, besides excellent heat resistance inherent in an aromatic polyamide.
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"Photosensitive Polyimides--Fundamentals and Applications," pp. 298-301 (1955).
"The Preparation of Aromatic Amines with Sodium Amide in Liquid Ammonia," J. Am. Chem. Soc., 74, pp. 3011-3013 (1952).
Ohta Masahiro
Oikawa Hideaki
Sakata Yoshihiro
Shibuya Atsushi
Takuma Keisuke
Merriam Andrew E. C.
Mitsui Chemicals Inc.
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