Composition, adhesive agent, adhesive sheet, and laminate

Patent metadata

Field	Value
Publication number	US-2016168309-A1
Application number	US-201414888495-A
Country	US
Kind code	A1
Filing date	May 13, 2014
Priority date	May 24, 2013
Publication date	Jun 16, 2016
Grant date	—

Abstract

The present invention provides a composition obtained by blending a polythiol compound (A), an isocyanate group-containing compound (B) and a radical generator (C), wherein the polythiol compound (A) is at least one compound selected from an aliphatic polythiol and an aromatic polythiol each of which has a thiol group binding to a primary carbon atom and may contain a hetero atom. The present invention thus provides a composition capable of bonding a rubber member, particularly a vulcanized rubber member, strongly, readily and within a short time, an adhesive and an adhesive sheet using the composition, and a laminate produced by bonding a rubber layer using at least one of these adhesive composition and adhesive sheet.

First claim

1 . A composition obtained by blending a polythiol compound (A), an isocyanate group-containing compound (B) and a radical generator (C), wherein:
the polythiol compound (A) is at least one compound selected from an aliphatic polythiol and an aromatic polythiol each of which has a thiol group binding to a primary carbon atom and may contain a hetero atom.

2 . The composition according to claim 1 , wherein the polythiol compound (A) is an aliphatic polythiol.

3 . The composition according to claim 2 , wherein the aliphatic polythiol is an acyclic aliphatic compound optionally containing a hetero atom.

4 . The composition according to claim 2 , wherein the aliphatic polythiol is a compound having an isocyanurate ring structure.

5 . The composition according to claim 3 , wherein the aliphatic polythiol is at least one compound selected from a (tetrafunctional) compound having four said thiol groups in the molecule and a (hexafunctional) compound having six said thiol groups in the molecule.

6 . The composition according to claim 4 , wherein the aliphatic polythiol is a (trifunctional) compound having three said thiol groups in the molecule.

7 . The composition according to claim 1 , wherein the ratio of the total molar number of the isocyanate group contained in the isocyanate-containing compound (B) to the total molar number of the thiol group contained in the polythiol compound (A) (isocyanate group/thiol group) is from 0.2 to 0.78.

8 . The composition according to claim 1 , wherein the ratio of the total molar number of the radical generator (C) to the total molar number of the thiol group contained in the polythiol compound (A) (radical generator (C)/thiol group) is 0.025 or more.

9 . An adhesive comprising the composition of claim 1 .

10 . An adhesive sheet using the composition of claim 1 .

11 . A laminate comprising two or more layers bonded to each other, wherein:
at least one layer is a rubber layer, and the at least one rubber layer is adhered to the adjacent layer via the adhesive of claim 9 .

12 . A laminate comprising two or more layers bonded to each other, wherein:
at least one layer is a rubber layer, and the at least one rubber layer is adhered to the adjacent layer via the adhesive sheet of claim 10 .

Assignees

• Bridgestone Corp

Inventors

• Ishihara Takenobu
• Akama Shuuyou
• Hara Atsushi
• Gondoh Akiko

Classifications

• C09J175/06

  from polyesters · CPC title

• B32B2255/10

  on synthetic resin layer or on natural or synthetic rubber layer · CPC title

• C08G18/755

  and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate · CPC title

• C08G18/3876 Primary

  containing mercapto groups · CPC title

• B32B25/12

  comprising natural rubber · CPC title