Intermediate film for laminated glass, and laminated glass
A technology of laminated glass and intermediate film, applied in the direction of glass/slag layered products, layered products, synthetic resin layered products, etc., to achieve the effect of suppressing the rise of YI value
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Embodiment 1
[0160] Preparation of Composition X for Forming the First Layer:
[0161] Polyvinyl acetal resin (polyvinyl butyral (PVB) resin, polyvinyl alcohol (PVA) with an average degree of polymerization of 2300, a hydroxyl content of 23.0 mol%, a degree of acetylation of 12.5 mol%, butyralized 64.5 mol %) 100 parts by weight, 60 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as a plasticizer, TINUVIN765 (manufactured by BASF Corporation, N-alkyl type, molecular weight 509) 0.2 parts by weight and 0.2 parts by weight of BHT (2,6-di-t-butyl-p-cresol, molecular weight: 220) were mixed to obtain a composition X for forming the first layer.
[0162] Preparation of composition Y for forming the second and third layers:
[0163] Polyvinyl acetal resin (polyvinyl butyral (PVB) resin, polyvinyl alcohol (PVA) with an average degree of polymerization of 1700, a hydroxyl content of 30.0 mol%, a degree of acetylation of 1.0 mol%, butyralized 69.0 mole %) 100 parts by weight, 40 p...
Embodiment 2~24 and comparative example 1~5
[0169] As shown in the following Tables 1 to 3, the types and contents of the components contained in the first layer, the second layer, and the third layer were set, and the intermediate film and the intermediate film were prepared in the same manner as in Example 1. Laminated glass.
[0170] (evaluate)
[0171] (1) The glass transition temperature of the first layer
[0172] Kneaded products having respective compositions of the first layer in Examples and Comparative Examples were prepared. The obtained kneaded product was press-molded with a press-molding machine to obtain a resin film A having an average thickness of 0.35 mm. The obtained resin film A was left to stand under the conditions of 25 degreeC and 30% of relative humidity for 2 hours. After leaving to stand for 2 hours, the viscoelasticity was measured using "ARES-G2" manufactured by TAINSTRUMENTS CO., LTD. As a jig, a parallel plate with a diameter of 8 mm was used. The measurement was carried out under th...
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