Polyester polyol, polyol preparation for laminating adhesive agent, resin composition, curable resin composition, adhesive agent for laminating use, and back sheet for solar cell

Patent metadata

Field	Value
Publication number	US-2018155589-A1
Application number	US-201815872164-A
Country	US
Kind code	A1
Filing date	Jan 16, 2018
Priority date	Sep 6, 2013
Publication date	Jun 7, 2018
Grant date	—

Abstract

Provided are a polyester polyol which exhibits a high adhesion strength after being cured in a case of being used as a main agent for an adhesive for lamination, an excellent temporal stability in which the adhesion strength is not deteriorated in a heat and moisture resistance test, and an excellent appearance after being subjected to a lamination processing, a resin composition using the same, a two-part adhesive for lamination which contains the resin composition, and a back sheet for a solar cell. Specifically, as a main agent for the two-part adhesive for lamination, a polyester polyol which has a resin structure obtained by reacting a branched alkylene diol, a long-chain aliphatic dicarboxylic acid having 8 to 20 carbon atoms, and an aromatic tricarboxylic acid, and has a weight average molecular weight (Mw) of 10,000 to 100,000 and a molecular weight distribution (Mw/Mn) of 3.0 to 4.7 is used.

First claim

1 - 5 . (canceled)

6 . The resin composition comprising, as essential components:
the polyester polyol (A); the polyfunctional epoxy compound (B); and a hydroxyl group-containing aliphatic polycarbonate (C), wherein the polyester polyol (A) has a resin structure obtained by reacting a branched alkylene diol, a long-chain aliphatic dicarboxylic acid having 8 to 20 carbon atoms and an aromatic tricarboxylic acid, and which has a weight average molecular weight (Mw) of 10,000 to 100,000 and a molecular weight distribution (Mw/Mn) of 3.0 to 4.7.

7 - 9 . (canceled)

10 . The resin composition according to claim 6 ,
wherein the polyester polyol (A) is obtained by further using an aromatic dicarboxylic acid as a raw material component, in addition to the branched alkylene diol, the long-chain aliphatic dicarboxylic acid having 8 to 20 carbon atoms and the aromatic tricarboxylic acid, to perform the reaction.

11 . The resin composition according to claim 6 ,
wherein the polyester polyol (A) has a hydroxyl value of 2 to 30 mgKOH/g.

Assignees

• Dainippon Ink & Chemicals

Inventors

• Umino Akio
• Uno Seiichi
• Hozumi Masami
• Akita Kouji
• Toda Tetsuya

Classifications

• C09J2203/322

  for the production of solar panels · CPC title

• C08G18/0823

  containing carboxylate salt groups or groups forming them · CPC title

• C08G18/285

  Nitrogen containing compounds · CPC title

• C09J167/02 Primary

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C09J167/06 takes precedence) · CPC title

• C08G18/12

  using two or more compounds having active hydrogen in the first polymerisation step · CPC title