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:
Jul. 29, 1997
Filed:
Feb. 10, 1995
Wen-Bing Kang, Kawagoe, JP;
Tsunetoshi Sugiyama, Higashimatsuyama, JP;
Shizuo Ogura, Tsurugashima, JP;
Yusuke Takano, Tokyo, JP;
Hoechst Aktiengesellschaft, Frankfurt, DE;
Abstract
A polymer containing triazine rings that has a molecular weight of 5,000-1,000,000 and that comprises a recurring unit represented by the general formula (I): ##STR1## wherein X.sup.1 and X.sup.2 are each independently S, NR.sup.1 (R is a hydrogen atom, an alkyl group or an aryl group) or O; Y may be an alkylene group, a divalent substituted or unsubstituted aromatic ring group that do not contain chromophore moieties or a group in which said aromatic ring groups are bonded or condensed together; Z is either a spacer group comprising a group represented by --G--(CH.sub.2).sub.n -- (n is an integer of 1-10) or a direct bond (G is S, NR.sup.4 or O, and R.sup.4 is a hydrogen atom, an alkyl group or an aryl group); and A is an organic chromophore moiety in which an electron donative group and an electron attractive group are conjugated via a .pi.-electron system. The polymer is lightproof, forms a thin film of high quality and has a high glass transition point.