Adhesive composition and adhesive sheet
A composition and adhesive technology, applied in the direction of adhesive types, ester copolymer adhesives, polyurea/polyurethane adhesives, etc. Small speed dependence, small peeling temperature dependence, contamination reduction effect
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[0153] Hereinafter, the present invention will be described more specifically based on examples, but the present invention is not limited to these examples. In descriptions of the following Examples and the like, "parts" means "parts by mass" unless otherwise specified.
[0154] Each measurement value in an Example was calculated|required by the following method.
[0155] 〔(meth)acrylate polymer〕
[0156]
[0157] The weight average molecular weight (Mw) and the number average molecular weight (Mn) of a (meth)acrylate polymer were calculated|required by standard polystyrene conversion by the gel permeation chromatography (GPC) method under the following conditions.
[0158] ・Measuring device: HLC-8120GPC (manufactured by Tosoh Corporation)
[0159] ・The composition of the GPC column: the following 5 columns (all produced by Tosoh Co., Ltd.)
[0160] (1) TSK-GELHXL-H (guard column)
[0161] (2) TSK-GELG7000HXL
[0162] (3) TSK-GELGMHXL
[0163] (4) TSK-GELGMHXL
[0...
manufacture example 1
[0176] Add 100 parts of n-butyl acrylate and 0.08 parts of bis[4-{ethyl-(2-hydroxyethyl)aminocarbonyl) }-benzyl] trithiocarbonate (manufactured by Nippon Terpene Chemical Co., Ltd.) (hereinafter also referred to as "RAFT agent-1"), while nitrogen gas was introduced into the flask, the contents of the flask were heated to 80 ℃.
[0177] [chemical 12]
[0178]
[0179] Then, 0.02 parts of 2,2'-azobisisobutyronitrile (hereinafter also referred to as "AIBN") was added to the flask under stirring, and the temperature of the contents in the flask was maintained at 80°C. 1 hour heating and cooling. Then, while keeping the temperature of the contents in the flask at 80°C, 80 parts of ethyl acetate was dripped over 1 hour, and then the temperature of the contents in the flask was maintained at 80°C for 10 hours. Heat and cool, and finally add 20 parts of ethyl acetate.
[0180] Thus, a polymer solution containing an acrylic polymer (1) was obtained.
[0181] The molecular weight...
manufacture example 2、4、5 and 6、 comparative example manufacture example 3
[0183] In addition to changing the type and amount of monomers and the type and amount of RAFT agents in Production Example 1 to those described in Table 1, acrylic acid polymers (2), (4), ( 5) or (6), or a polymer solution containing an acrylic polymer (c3).
[0184] In addition, RAFT agent-2 is represented by the following formula.
[0185] [chemical 13]
[0186]
[0187] [Manufacturing example 3]
[0188] Add 17 parts of methyl acrylate and 0.08 parts of the above-mentioned RAFT agent-1 to a flask equipped with a stirring device, a nitrogen inlet tube, a thermometer and a reflux condenser, and heat the contents of the flask to 80°C while introducing nitrogen into the flask. ℃.
[0189] Then, 0.02 parts of AIBN was added to the flask with stirring, and heating and cooling were performed for 2 hours under conditions such that the temperature of the contents in the flask could be maintained at 80°C. The non-volatile components of the acrylic polymer thus obtained were 9...
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