Adhesive composition and polarizer film comprising same
A technology of adhesives and compositions, applied in the direction of non-polymer adhesive additives, adhesive types, adhesive additives, etc., which can solve problems such as uneven bonding strength of adhesive compositions, etc.
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preparation example 1
[0084] Preparation Example 1: Preparation of Acrylic Copolymer
[0085] In a 1L four-necked flask, 60 g of ethyl acetate, 55 g of butyl acrylate, 20 g of methyl acrylate, 5 g of 2-hydroxyethyl methacrylate and 20 g of N-vinylpyrrolidone were placed and heated to 70°C. 0.08 g of azobisisobutyronitrile as an initiator was dissolved in 20 g of ethyl acetate and added to the flask. The mixture was allowed to react at 65° C. for 3 hours, after which 320 g of ethyl acetate was added to cool the mixture to 40° C., thereby producing an acrylic acid copolymer. The reaction was carried out while introducing nitrogen gas at 10 cc / min. The acrylic copolymer has a viscosity of 4500 cps, a solids content of 25%, a weight average molecular weight of 900000 g / mol and a polydispersity of 3.4. Viscosity was measured at 25°C with a Brookfield DV-II+ Viscometer No. 7 spindle. Polydispersity is determined by dividing the weight average molecular weight by the number average molecular weight. S...
preparation example 2
[0086] Preparation Example 2: Preparation of Acrylic Copolymer
[0087] In a 1 L four-necked flask, 60 g of ethyl acetate, 53 g of butyl acrylate, 20 g of methyl acrylate, 5 g of 2-hydroxyethyl methacrylate, and 20 g of N-vinylpyrrolidone were placed and heated to 70°C. 0.08 g of azobisisobutyronitrile as an initiator was dissolved in 20 g of ethyl acetate and added to the flask. After maintaining the mixture for 3 hours, 320 g of ethyl acetate was added to cool the mixture to 40°C. Then, 2 g of 3-isocyanatopropyltriethoxysilane and 0.01 g of dibutyltin dilaurate (DBTDL) as a catalyst were added, followed by reaction for 12 hours. The reaction was carried out while introducing nitrogen gas at 10 cc / min. The prepared acrylic copolymer had a viscosity of 4,800 cps, a solids content of 25%, a weight average molecular weight of 930,000 g / mol, and a polydispersity of 3.2.
preparation example 3 to 6
[0088]Preparation Examples 3 to 6: Preparation of Acrylic Copolymer
[0089] The same procedure as Preparation Example 1 was carried out, except that the components were mixed according to the composition listed in Table 1. Table 1 (unit: g)
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