Adhesive sheet and display body
A display and adhesive technology, applied in the direction of adhesives, adhesive types, electric solid devices, etc., can solve the problems such as the decline of step followability, the deterioration of processability, the reduction of the film strength of the adhesive layer, etc., to achieve anti-foaming properties. Excellent effect, excellent step followability, and good workability
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preparation example Construction
[0094] (4) Preparation of adhesive composition
[0095] The adhesive composition P can be produced by preparing a (meth)acrylate polymer (A), and adding a crosslinking agent (B) and additive.
[0096] The (meth)acrylate polymer (A) can be produced by polymerizing a mixture of monomers constituting a polymer by a normal radical polymerization method. It is preferable to perform polymerization of a (meth)acrylate polymer (A) by the solution polymerization method using a polymerization initiator as needed. Examples of the polymerization solvent include ethyl acetate, n-butyl acetate, isobutyl acetate, toluene, acetone, hexane, methyl ethyl ketone, and the like, and two or more of them may be used in combination.
[0097] Examples of the polymerization initiator include azo compounds, organic peroxides, and the like, and two or more types may be used in combination. Examples of azo compounds include 2,2'-azobisisobutyronitrile, 2,2'-azobis(2-methylbutyronitrile), 1,1'-azobis(cy...
preparation example 1
[0201] -Production of a laminate having a first adhesive layer or a second adhesive layer-
[0202] (1) Preparation of (meth)acrylate polymer (A)
[0203] A (meth)acrylate polymer (A) was prepared by copolymerizing 60 parts by mass of 2-ethylhexyl acrylate, 20 parts by mass of methyl methacrylate, and 20 parts by mass of 2-hydroxyethyl acrylate. As a result of measuring the molecular weight of this (meth)acrylate polymer (A) by the method mentioned later, the weight average molecular weight (Mw) was 600,000.
[0204] (2) Preparation of Adhesive Composition P
[0205]100 parts by mass of the (meth)acrylate polymer (A) obtained in the above step (1) (value in terms of solid content; the same applies hereinafter), trimethylolpropane-modified toluene as a crosslinking agent (B) 0.25 parts by mass of diisocyanate (manufactured by Nippon Polyurethane Industry Co., Ltd., product name "Coronate L"), and 3-glycidyloxypropyltrimethoxysilane (Shin-Etsu Chemical Co., Ltd., product name...
preparation example 2~ preparation example 3
[0224] As shown in Table 1, the types and ratios of the monomers constituting the (meth)acrylate polymer (A) and the weight average molecular weight of the (meth)acrylate polymer (A) were changed. Besides, a laminated body was prepared in the same manner as in Preparation Example 1.
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