Interlayer for laminated glass and laminated glass
A technology of laminated glass and interlayer film, applied in glass/slag layered products, layered products, transportation and packaging, etc., can solve the problems of reduced sound insulation, low sound insulation, and inability to obtain sufficient sound insulation, so as to achieve sound insulation. Sex-enhancing effect
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Synthetic example 1
[0124] Synthesis of polyvinyl butyral resin a:
[0125] A polyvinyl butyral resin (average degree of polymerization 3000) having a degree of acetylation of 0.5 mol%, a degree of butyralization of 40 mol%, and a hydroxyl content of 59.5 mol% was dissolved in pyridine. Add 30 molar equivalents of acetic anhydride to the butyraldehyde resin, and stir for 120 minutes at 80° C. Pyridine was removed, and the polyvinyl butyral resin was washed with water and dried to obtain a polyvinyl butyral resin a (average degree of polymerization: 3000). The obtained polyvinyl butyral resin a had a degree of acetylation of 30.5 mol %, a degree of butyralization of 40 mol %, and a hydroxyl group content of 29.5 mol %.
Synthetic example 2
[0127] Synthesis of polyvinyl butyral resin b:
[0128] A polyvinyl butyral resin (average degree of polymerization 3000) having a degree of acetylation of 0.5 mol%, a degree of butyralization of 55 mol%, and a hydroxyl group content of 44.5 mol% was dissolved in pyridine, and the dissolved polyvinyl butyral Add 39.5 molar equivalents of acetic anhydride to the aldehyde resin, and stir for 120 minutes at 80°C. Pyridine was removed, and the polyvinyl butyral resin was washed with water and dried to obtain a polyvinyl butyral resin b (average degree of polymerization: 3000). The obtained polyvinyl butyral resin b had a degree of acetylation of 20.5 mol%, a degree of butyralization of 55 mol%, and a hydroxyl group content of 24.5 mol%.
[0129] In addition, in Examples, the following polyvinyl acetal resins c, d, e, f were used.
[0130] Polyvinyl acetal resin c: acetylation degree 12.8 mol%, butyralization degree 63.5 mol%, hydroxyl group content 23.7 mol%
[0131] Polyvinyl ...
Embodiment 1
[0135] 100 parts by weight of the obtained polyvinyl butyral resin a (degree of acetylation 30.5 mol %), 50 parts by weight of triethylene glycol di-2-ethylhexanoate as a plasticizer and rosin as a tackifier 50 parts by weight of a resin ("Pinecrystal KE-311" manufactured by Arakawa Chemical Co., Ltd.) was sufficiently kneaded with a mixing roll to obtain a composition for an intermediate layer.
[0136] 100 parts by weight of polyvinyl butyral resin d (degree of acetylation 1 mol%) and 29 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as a plasticizer are fully mixed, A composition for a protective layer was obtained.
[0137] The obtained composition for the intermediate layer and the composition for the protective layer were molded using a co-extruder to produce a protective layer B (thickness 0.35 mm) / intermediate layer A (thickness 0.1 mm) / protective layer B (thickness 0.35 mm) Interlayer film (thickness 0.8 mm) of laminated structure.
[0138] The ...
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