Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1998-09-18
2000-08-08
Hampton-Hightower, P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528125, 528128, 528172, 528173, 528174, 528176, 528183, 528188, 528220, 528229, 528350, C08G 7310, C08G 6926
Patent
active
061003719
ABSTRACT:
A polyimide for optical communications has a monomer, represented by the formula (1), as a repeating unit: ##STR1## wherein X.sub.1 and X.sub.2 are independently selected from the group consisting of halogen atom, halogenated alkyl group, halogenated aromatic ring group, --NO.sub.2, --OR.sup.1 and --SR.sup.1 (where R.sup.1 is selected from the group consisting of halogenated alkyl and halogenated aromatic ring groups); and Z is selected from the group consisting of divalent halogenated aliphatic hydrocarbon, divalent halogenated aliphatic cyclic hydrocarbon and divalent halogenated aromatic hydrocarbon. Thus, light absorption loss at a near infrared light wavelength range can be minimized by using the polyimide, so that the polyimide is very useful as an optical material in the optical communications field using light of a near infrared light region.
REFERENCES:
patent: 5837804 (1998-11-01), Yarmagishi et al.
WPI Accession No. 92-430319[52] & JP 4328504 (Nippon).
WPI Accession No. 92-430318[52] & JP 4328503 (Nippon).
WPI Accession No. 92-419571[51] & JP 4314733 (Nippon); and.
WPI Accession No. 92-419569[51] & JP 4314731 (Nippon).
Chung Eun-young
Rhee Tae-hyung
Suh Dong-Hack
Bushnell Esq. Robert E.
Hampton-Hightower P.
Samsung Electronics Co,. Ltd.
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