Adhesive composition, adhesive layer, optical film having attached adhesive layer, optical member, and image display device
An adhesive layer, optical component technology, applied in the directions of polymer adhesive additives, non-polymer adhesive additives, adhesive types, etc., can solve the problems of deterioration and deterioration of polarizers, and achieve excellent durability , excellent low moisture permeability, excellent optical reliability
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[0127] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples. In addition, the parts and % in each example are based on weight.
[0128] (weight average molecular weight)
[0129] The measurement of the weight average molecular weight (Mw) was carried out by gel permeation chromatography (GPC method), and a column with an inner diameter of 6.0 mm and a length of 150 mm (manufactured by Tosoh Corporation, TSKgel SuperHZM-H / HZ4000 / HZ3000 / HZ2000) are used in series connection, the eluent uses tetrahydrofuran, the concentration is 1g / L, the flow rate is 0.6ml / min, the temperature is 40°C, and the sample injection volume is 20μl. The detector is an infrared (RI) detector. . In addition, TSK standard polystyrene (manufactured by Tosoh Corporation) was used to prepare the calibration curve of the molecular weight.
manufacture example 1
[0130] Production example 1 (manufacture of polarizing film)
[0131] In order to produce a thin polarizing film, first, by stretching a laminate having a 9 μm thick polyvinyl alcohol (PVA) layer formed on an amorphous polyethylene terephthalate (PET) substrate at a temperature of 130 The stretching was assisted in the air at ℃, thereby producing a stretched laminate. Next, the stretched laminated body was dyed to produce a colored laminated body, and further, the colored laminated body was stretched in a boric acid aqueous solution at a stretching temperature of 65°C to make a total stretch ratio of 5.94. An optical film laminate of a 4 μm-thick PVA layer obtained by integrally stretching an amorphous PET substrate in a multifold manner. Through such two-step stretching, an optical film laminate including a PVA layer with a thickness of 5 μm constituting a highly functional polarizing film (polarizer) formed on an amorphous PET substrate The PVA molecules of the PVA layer a...
Embodiment 1
[0134] A styrene-ethylene-propylene-styrene block copolymer (SEPS, trade name: SEPTON 2063, styrene content: 13 %, manufactured by Kuraray Co., Ltd.) 100 parts by weight, hydrogenated terpene phenol (trade name: YS POLYSTER TH130, softening point: 130° C., hydroxyl value: 60, manufactured by Yasuhara Chemical Industry Co., Ltd.) as a tackifier (B) 40.4 Parts by weight, 61.7 parts of petroleum-based tackifier (trade name: Piccolastic A5, vinyltoluene-based tackifier, softening point: 5° C., manufactured by Eastman Kodak Company), polybutene (commercial product) as softener (C) Name: HV-300, weight average molecular weight: 3000, JX Nippon Oil & Energy Co., Ltd.) 21.3 parts of toluene solution (adhesive solution) was adjusted to prepare an adhesive composition (solution).
[0135] Release treatment of applying the obtained adhesive composition (solution) to a polyester film with a thickness of 38 μm (trade name: DIAFOIL MRF, manufactured by Mitsubishi Plastics Co., Ltd.) that wa...
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Abstract
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