(Meth)acryloyl-terminated polyisobutylene polymer, method for producing the same, and active energy ray-curable composition

Patent metadata

Field	Value
Publication number	US-9708424-B2
Application number	US-201615340549-A
Country	US
Kind code	B2
Filing date	Nov 1, 2016
Priority date	Sep 27, 2011
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

The purpose of the present invention is to provide a polymer having a low halogen atom content remaining in the polymer, a simple production method thereof, an active energy ray-curable composition that can be rapidly cured by an irradiation of a small amount of light, and a cured product thereof. These purpose can be achieved by an active energy ray-curable composition, including a polyisobutylene polymer (A) represented by the following general formula (1) (wherein R 1 represents a monovalent or polyvalent aromatic hydrocarbon group, or a monovalent or a polyvalent aliphatic hydrocarbon group; A represents a polyisobutylene polymer; R 2 represents a divalent saturated hydrocarbon group having 2-6 carbon atoms, which contains no hetero atoms; R 3 and R 4 each represent hydrogen, a monovalent hydrocarbon group having 1-20 carbon atoms, or an alkoxy group having 1-20 carbon atoms; R 5 represents hydrogen or a methyl group; and n denotes a natural number), and an active energy ray polymerization initiator (B).

First claim

The invention claimed is:

1. An active energy ray-curable composition comprising: a (meth)acryloyl-terminated polyisobutylene polymer (A) and an active energy ray polymerization initiator (B),
wherein the (meth)acryloyl-terminated polyisobutylene polymer (A) is represented by the following general formula (1):

where R 1 represents a monovalent or polyvalent aromatic hydrocarbon group, or a monovalent or a polyvalent aliphatic hydrocarbon group; A represents a polyisobutylene polymer; R 2 represents a divalent saturated hydrocarbon group having 2 to 6 carbon atoms and containing no hetero atoms; R 3 and R 4 each independently represent hydrogen, a monovalent hydrocarbon group having 1 to 20 carbon atoms, or an alkoxy group having 1 to 20 carbon atoms; R 5 represents hydrogen or a methyl group; and n denotes a natural number.

2. The active energy ray-curable composition according to claim 1 ,
wherein a main chain of the polyisobutylene polymer represented by A is produced by living cationic polymerization.

3. The active energy ray-curable composition according to claim 1 ,
wherein the (meth)acryloyl-terminated polyisobutylene polymer (A) has a molecular weight of 200 to 500,000 in terms of number average molecular weight based on polystyrene measured by size exclusion chromatography, and a molecular weight distribution of 1.8 or less.

4. The active energy ray-curable composition according to claim 1 ,
wherein a content of the active energy ray polymerization initiator (B) is 0.001 to 20 parts by weight per 100 parts by weight of the (meth)acryloyl-terminated polyisobutylene polymer (A).

5. A cured product obtained by curing the active energy ray-curable composition according to claim 1 with active energy rays.

Assignees

• Kaneka Corp

Inventors

• Ikari Yoshihiro
• Nakabayashi Hironari

Classifications

• C08F110/10 Primary

  Isobutene · CPC title

• C08F2810/30

  leading to the formation or introduction of aliphatic or alicyclic unsaturated groups · CPC title

• C08F8/26

  Removing halogen atoms or halogen-containing groups from the molecule · CPC title

• C08F299/00

  Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers · CPC title

• C08F2810/40

  taking place solely at one end or both ends of the polymer backbone, i.e. not in the side or lateral chains · CPC title