Resin produced by polycondensation, and resin composition

Patent metadata

Field	Value
Publication number	US-10689486-B2
Application number	US-201515306638-A
Country	US
Kind code	B2
Filing date	May 1, 2015
Priority date	May 7, 2014
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

According to one embodiment, a polyester resin is provided, which includes a structural unit derived from a compound represented by general formula (1), a structural unit derived from a compound represented by general formula (2), and a structural unit derived from a dicarboxylic acid or a derivative thereof.

First claim

The invention claimed is:

1. A polyester resin, comprising:
(i) as dihydroxy component, 63 to 81 mol % of a structural unit derived from a 2,2′-bis(2-hydroxyethoxy)-1,1′-binaphthalene
and 9 to 27 mol % of a structural unit derived from a 9,9′-bis[4-(2-hydroxyethoxy)phenyl]fluorene
and
(ii) as dicarboxylic acid component, a structural unit derived from dimethyl terephthalate (DMT) or dimethyl 2,6-naphthalenedicarboxylate (NDCM);
wherein the polyester resin has a refractive index of 1.652 to 1.658, as measured by dissolving the polyester resin in methylene chloride to produce a cast film, wherein the refractive index is measured by a refractometer with the refractive index measured at 25° C. and at 589 nm (d line).

2. The polyester resin according to claim 1 , further comprising, as dihydroxy component, a structural unit derived from an ethylene glycol.

3. An optical member comprising the polyester resin according to claim 1 .

4. The optical member according to claim 3 , which is an optical lens of a single-lens reflex camera, a digital still camera, a video camera, a cellular phone with a camera, a disposable camera, a telescope, binoculars, a microscope or a projector.

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Kato Noriyuki
• Ishizuka Hirohito
• SHIRATAKE Munenori
• Ishihara Kentaro

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• H01G9/20

  Light-sensitive devices · CPC title

• C08K5/02

  Halogenated hydrocarbons {(C08K5/0091 takes precedence)} · CPC title

• C08G2261/91

  Photovoltaic applications · CPC title

• C08G64/04 Primary

  Aromatic polycarbonates · CPC title