Interlayers for use in sound-insulating laminated glasses
AssigneeSekisui Chemical Co., Ltd.
InventorsKenichi Asahina, Naoki Ueda, Hirofumi Omura
Life of this patent
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Abstract
An interlayer for use in sound-insulating laminated glasses which is in the form of a laminated film of two kinds of resin films (A) and (B), each comprising a polyvinyl acetal acetalized with an aldehyde having 6 to 10 carbon atoms for the film (A) or with an aldehyde having 1 to 4 carbon atoms for the film (B), or is in the form of a resin film (C) comprising a mixture of the two kinds of polyvinyl acetal resins. The interlayer mitigates the coincidence effect to prevent the reduction of TL value without impairing the basic characteristics required of laminated glasses thereby permitting the interlayer to exhibit outstanding sound-insulating properties over a wide temperature range for a prolonged period of time.
Claims13
An interlayer for use in laminating two or more plates of glass together, the interlayer in the form of a laminated film and comprising at least one resin film (A) and at least one resin film (B), the resin film (A) comprising a resin (a) and a plasticizer, the resin film (B) comprising a resin (b) and a plasticizer, the resin (a) being a polyvinyl acetal having a degree of acetalization of at least 50% and prepared by acetalizing a polyvinyl alcohol with an aldehyde having 6 to 10 carbon atoms, the resin (b) being a polyvinyl acetal having a degree of acetalization of at least 50% and prepared by acetalizing a polyvinyl alcohol with an aldehyde having 1 to 4 carbon atoms.
An interlayer for use in laminating two or more plates of glass together, the interlayer in the form of a laminated film (C) comprising a mixture of resin (a), resin (b), and a plasticizer, the resin (a) being a polyvinyl acetal prepared by acetalizing a polyvinyl alcohol with an aldehyde having 6 to 10 carbon atoms, the resin (b) being a polyvinyl acetal prepared by acetalizing a polyvinyl alcohol with an aldehyde having 1 to 4 carbon atoms.
Dependencies are inferred from the claim text.