Method for producing (meth)acrylate copolymer

Patent metadata

Field	Value
Publication number	US-9051398-B2
Application number	US-201314385348-A
Country	US
Kind code	B2
Filing date	Mar 13, 2013
Priority date	Mar 22, 2012
Publication date	Jun 9, 2015
Grant date	Jun 9, 2015

Abstract

A method for producing a (meth)acrylate copolymer via anionic polymerization of a mixture of a di(meth)acrylate and an alkyl (meth)acrylate in the presence of an organolithium compound, a tertiary organoaluminum compound, and at least one Lewis base selected from ethers and tertiary polyamines. The (meth)acrylate copolymer produced has a (meth)acryloyl groups in a side chain.

First claim

The invention claimed is:

1. A method for producing a (meth)acrylate copolymer, comprising:
anionic polymerization of a mixture of a di(meth)acrylate represented by formula (1) and an alkyl (meth)acrylate represented by formula (2) in the presence of an organolithium compound, a tertiary organoaluminum compound comprising a chemical structure represented by formula (3) in its molecule, and at least one Lewis base selected from the group consisting of ethers and tertiary polyamines

wherein R 1 denotes a hydrogen atom or a methyl group, R 2 denotes a linear alkylene group having 1 to 5 carbon atoms, and R 3 and R 4 each independently denote a hydrocarbon group having 1 to 6 carbon atoms

wherein R 5 denotes a hydrogen atom or a methyl group, and R 6 denotes an alkyl group having 1 to 6 carbon atoms
Al—O—Ar  (3)

wherein Ar denotes an aromatic ring

wherein said (meth)acrylate copolymer produced by said method has (meth)acryloyl groups in a side chain thereof.

2. The method for producing a (meth)acrylate copolymer according to claim 1 , wherein the molar ratio of the di(meth)acrylate represented by formula (1) to the alkyl (meth)acrylate represented by formula (2) in the mixture ranges from 5:95 to 90:10.

3. The method for producing a (meth)acrylate copolymer according to claim 1 , wherein the anionic polymerization is performed at a temperature of −30° C. to 25° C.

4. The method for producing a (meth)acrylate copolymer according to claim 2 , wherein the anionic polymerization is performed at a temperature of −30° C. to 25° C.

5. The method for producing a (meth)acrylate copolymer according to claim 1 , wherein the molar ratio of tertiary organoaluminum compound to organolithium compound is 2.2-3.0, and wherein the consumption rate of said di(meth)acrylate represented by formula (1) and said alkyl (meth)acrylate represented by formula (2) in said anionic polymerization is 100%.

6. The method for producing a (meth)acrylate copolymer according to claim 1 , wherein the anionic polymerization is performed at a temperature of 0° C. to 25° C.

7. The method for producing a (meth)acrylate copolymer according to claim 2 , wherein the anionic polymerization is performed at a temperature of 0° C. to 25° C.

8. The method for producing a (meth)acrylate copolymer according to claim 5 , wherein the anionic polymerization is performed at a temperature of 0° C. to 25° C.

9. The method for producing a (meth)acrylate copolymer according to claim 1 , wherein the reaction rate of said (meth)acryloyl group in said side chain of said (meth)acrylate copolymer is 17.0 or less.

10. The method for producing a (meth)acrylate copolymer according to claim 5 , wherein the reaction rate of said (meth)acryloyl group in said side chain of said (meth)acrylate copolymer is 17.0 or less.

Assignees

• Kuraray Co

Inventors

• Tanabe Hirofumi
• Shimizu Seiya
• Maekawa Kazuhiko

Classifications

• C09D4/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} · CPC title

• C08F222/102

  of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate · CPC title

• C09J4/00

  Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16} · CPC title

• C08L2312/06

  by radiation · CPC title

• C08F4/565

  Lithium being present, e.g. butyllithium + sodiumphenoxide · CPC title