Composition and method for temporarily fixing member using same
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.
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-cyclohexadicarboxyimide)ethyl(meth)acrylate and 2-hydroxy-3-phenoxypropyl(meth)acrylate.
12. The composition as claimed in claim 1 , further comprising a polymerization inhibitor.
13. The composition as claimed in claim 1 , being a curable resin.
14. The composition as claimed in claim 1 , being photocurable.
15. The composition as claimed in claim 1 , being curable at ordinary temperature.
16. The composition as claimed in claim 1 , being photocurable and curable at ordinary temperature.
17. An adhesive composition, comprising the composition as claimed in claim 1 .
18. The adhesive composition as claimed in claim 17 , being used in adhesion of members to one another, each of which comprises both of area of light transmittance of less than 0.1% and area of light transmittance of 50% or larger.
19. The adhesive composition as claimed in claim 17 , being used in adhesion of members to one another, each of which has light transmittance of less than 0.1%.
20. A structure obtained by bonding and fixing members to one another by the adhesive composition as claimed in claim 17 .
21. A method for temporarily fixing members, comprising irradiating with visible light or ultraviolet light the adhesive composition as claimed in claim 17 to bond and fix temporarily members to one another, processing said temporarily fixed members, irradiating with visible light or ultraviolet light said adhesive composition, bringing cured body of said adhesive composition into contact with water to release said cured body from said members.
22. A method for temporarily fixing members, comprising irradiating with visible light or ultraviolet light the adhesive composition as claimed in claim 17 to bond members to one another, leaving them to be fixed temporarily, then processing said temporarily fixed members, bringing cured body of said adhesive composition into contact with water to release said cured body from said members.
23. A method for temporarily fixing members, comprising allowing the adhesive composition as claimed in claim 17 to bond and fix temporarily members to one another, processing said temporarily fixed members, bringing cured body of said adhesive composition into contact with water to release said cured body from said members.
24. The method for temporarily fixing members as claimed in claim 21 , wherein said adhesive composition is obtained by preliminarily mixing the first agent and the second agent.
25. The method for temporarily fixing members as claimed in claim 21 , wherein a bonded layered article is obtained by bonding and layering 2 to 100 pieces of members, and thereafter said bonded layered article is immersed in water to release said cured body of adhesive composition from said bonded layered article.
26. The method for temporarily fixing members as claimed in claim 21 , wherein said member comprises both of area of light transmittance of less than 0.1% and area of light transmittance of 50% or larger.
27. The method for temporarily fixing members as claimed in claim 21 , wherein said member has light transmittance of less than 0.1%.