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:
Jun. 25, 2013
Filed:
Aug. 01, 2011
Mikihiro Kashio, Tokyo, JP;
Toshio Sugizaki, Tokyo, JP;
Osamu Moriya, Yokosuka, JP;
Lintec Corporation, Tokyo, JP;
Abstract
A sealing material for optical elements with excellent transparency, crack resistance, and heat resistance which can produce a cured product of the sealing material and a sealed optical element are provided. The sealing material for optical elements comprising a compound with a ladder structure, which contains a repeating unit of the following formula (A) in the molecule as a major component, the compound being obtained by condensing a compound (1) shown by the formula, RSi(OR)(X), and a compound (2) shown by the formula, RSi(OR)(X), at a molar ratio of 1:9 to 10:0 in the presence of a phosphoric acid catalyst, wherein Rrepresents a group having a reactive functional group, Rrepresents an alkyl group having 1 to 20 carbon atoms, Rand Rindividually represents an alkyl group having 1 to 6 carbon atoms, Xand Xindividually indicate a halogen atom, p and q individually represent an integer from 0 to 3, and l, m, and n individually represent 0 or an arbitrary integer, provided that l and n are not 0 at the same time.