24-10-2013 дата публикации
Номер: US20130280540A1
Provided is an interlayer film for laminated glass comprising: a layer x which contains polyvinyl acetal (A1) having a content of vinyl alcohol units of 22 mol % or less, a plasticizer (B), heat ray shielding microparticles (C), phosphoric acid ester (D), and alkali metal salt and/or alkali earth metal salt (F), and has an acid number in accordance with JIS K2501 of 1.5 KOH mg/g or less; and a layer y containing polyvinyl acetal (A2) having a content of vinyl alcohol units of from 25 to 34 mol %, the plasticizer (B), and an ultraviolet absorber (E), wherein the layers y are located on both sides of the layer x. This enables to provide an interlayer film for laminated glass that is excellent in transparency, adhesion, durability, sound insulation, and a heat ray shielding property. 1. An interlayer film , comprising: polyvinyl acetal A1 comprising vinyl alcohol units of 22 mol % or less,', 'a plasticizer B,', 'heat ray shielding microparticles C,', 'phosphoric acid ester D, and', 'at least one of an alkali metal salt and an alkali earth metal salt F; and, '(i) a layer x which comprises polyvinyl acetal A2 comprising vinyl alcohol units of from 25 to 34 mol %,', 'the plasticizer B, and', 'an ultraviolet absorber E,, '(ii) a layer y which compriseswhereinthe layer x has an acid number in accordance with JIS K2501 of 1.5 KOH mg/g or less,the layer y is located on both sides of the layer x, andthe interlayer film is suitable for a laminated glass.2. The interlayer film according to claim 1 , wherein a content of the heat ray shielding microparticles C is of from 0.001 to 2 parts by weight based on 100 parts by weight of a total amount of the polyvinyl acetal A1 claim 1 , the polyvinyl acetal A2 claim 1 , and the plasticizer B.3. The interlayer film according to claim 1 , wherein surfaces of the heat ray shielding microparticles C are treated with an organic silicon compound comprising a hydrolyzable group.4. The interlayer film according to claim 1 , wherein the heat ray ...
Подробнее