The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 2009
Filed:
Dec. 21, 2007
Takeshi Eriguchi, Chiyoda-ku, JP;
Masahiro Ito, Chiyoda-ku, JP;
Kaori Tsuruoka, Chiyoda-ku, JP;
Yuichiro Ishibashi, Chiyoda-ku, JP;
Takeshi Eriguchi, Chiyoda-ku, JP;
Masahiro Ito, Chiyoda-ku, JP;
Kaori Tsuruoka, Chiyoda-ku, JP;
Yuichiro Ishibashi, Chiyoda-ku, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
A crosslinkable fluorinated aromatic prepolymer which is capable of forming a cured product having high transparency, a low relative permittivity, high heat resistance, low birefringence and high flexibility, and which is obtained by subjecting a compound (Y-1) having a polymerizable double bond (A) and/or a phenolic hydroxyl group and a compound (Y-2) having a polymerizable double bond (A) and a fluorinated aromatic ring, to a condensation reaction in the presence of a HF-removing agent, with a particular fluorinated aromatic compound (B) and a compound (C) having at least 3 phenolic hydroxyl groups, the respective phenolic hydroxyl groups not being present in the same aromatic ring, and which has polymerizable double bonds (A) and ether bonds and has a number average molecular weight of from 1×10to 5×10.