Composition and method for temporarily fixing member using same

Patent metadata

Field	Value
Publication number	US-9718996-B2
Application number	US-201214344869-A
Country	US
Kind code	B2
Filing date	Sep 14, 2012
Priority date	Sep 14, 2011
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

The present invention is intended to provide an adhesive composition for temporarily fixing which exhibits high adhesive strength and peeling property in water, and which is applicable to members having opaque area, and still which leaves no adhesive deposit on released members, so that it realize the excellent workability and environment. The present invention is a two-component composition for temporarily fixing members, comprising (A) a polyfunctional (meth)acrylate, (B) a mono-functional (meth)acrylate, (C) an organic peroxide, (D) a decomposition accelerator, (E) a polymerization initiator and (G) particulate matter, and composed of two-component system of a first agent and a second agent, said first agent containing at least said component (C) and said second agent containing at least said component (D), wherein cured body of said composition being used to bond members is brought into contact with water to be decomposed and release said members.

First claim

The invention claimed is:

1. A two-component composition for temporarily fixing members, comprising (A) a polyfunctional (meth)acrylate, (B) a mono-functional (meth)acrylate, (C) an organic peroxide, (D) a decomposition accelerator, (E) a polymerization initiator and (G) particulate matter, and composed of two-component system of a first agent and a second agent, said first agent containing at least said component (C) and said second agent containing at least said component (D), wherein cured body of said composition being used to bond members is brought into contact with water to be decomposed and release said members, and
wherein the glass transition temperature of said cured body is from 0 to 45° C., and
wherein the total amount of (A), (B), (C), and (D) is less than 90% by mass of the composition, and
wherein the total amount of (A), (B), and (E) is less than 90% by mass of the composition.

2. The composition as claimed in claim 1 , further comprising (F) organic thermally expandable particles.

3. The composition as claimed in claim 1 , wherein said component (E) is one or two or more selected from a group consisting of benzyl dimethylketal, oxy-phenyl-acetic acid 2-[2-oxo-2-phenyl-acetoxy-ethoxy]-ethyl ester and oxy-phenyl-acetic acid 2-[2-hydroxy-ethoxy]-ethyl ester.

4. The composition as claimed in claim 1 , wherein said component (G) is one or two or more selected from a group consisting of cross-linked polymethyl(meth)acrylate particles, cross-linked polystyrene particles and cross-linked polymethyl(meth)acrylate/polystyrene copolymer particles.

5. The composition as claimed in claim 1 , wherein the average size of said component (G) is 20 to 200 μm.

6. The composition as claimed in claim 1 , wherein the standard deviation (σ) for logarithm of particle size (μm) of said component (G) is from 0.0001 to 0.25,
wherein σ is expressed by the following formula:

σ
=

{

1
100

⁢

∑

j
=
1

n

⁢

⁢

q
j

⁡

(

log
10

⁢

x
j

+

log
10

⁢

x

j
+
1

2

)

2

}

-

μ
2

where
the average value of the particle size is 10 μ ;

μ
=

1
100

⁢

∑

j
=
1

n

⁢

⁢

q
j

⁢

log
10

⁢

x
j

+

log
10

⁢

x

j
+
1

2

;

x j is particle size (μm); and
q j is differential percentage of the relative amount of particles.

7. The composition as claimed in claim 1 , wherein said component (G) has spherical shape.

8. The composition as claimed in claim 1 , wherein said (A) a polyfunctional (meth)acrylate comprises polyfunctional (meth)acrylate oligomer/polymer, and/or polyfunctional (meth)acrylate monomer.

9. The composition as claimed in claim 8 , wherein said polyfunctional (meth)acrylate oligomer/polymer comprises one or two or more selected from a group consisting of 1,2-polybutadiene-terminated urethane (meth)acrylate, polyester-based urethane (meth)acrylate, and polyether-based urethane (meth)acrylate.

10. The composition as claimed in claim 8 , wherein said polyfunctional (meth)acrylate monomer comprises one or two or more selected from a group consisting of tripropylene glycol di(meth)acrylate, 1,9-nonanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, and dicyclopentanyl di(meth)acrylate.

11. The composition as claimed in claim 1 , wherein said (B) a mono-functional (meth)acrylate comprises one or two or more selected from a group consisting of phenol (2-mol ethylene oxide modified) (meth)acrylate, 2-(1,2-

Assignees

• Kurimura Hiroyuki
• Tanaka Kenji
• Denka Company Ltd

Inventors

• Kurimura Hiroyuki
• Tanaka Kenji

Classifications

• C09J5/00 Primary

  Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers · CPC title

• C08K3/0025

  Chemistry & Metallurgy · mapped topic

• C09J151/003

  grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C09J151/04, C09J151/06 take precedence) · CPC title

• Y10T428/31935

  Ester, halide or nitrile of addition polymer · CPC title

• C09J133/06

  of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical · CPC title