Interlayers for use in sound-insulating laminated glasses

Details Interlayers for use in sound-insulating laminated glasses Interlayers for use in sound-insulating laminated glasses

1991-05-13

1993-03-02

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of quartz or glass

181176, 181294, 252 62, 428515, 428524, 428525, 525155, 5253287, 5253288, B32B 1710

Patent

active

051908263

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.

REFERENCES:
patent: 2232806 (1941-02-01), Ryan et al.
patent: 2234829 (1941-03-01), Neher et al.
patent: 3783084 (1971-07-01), Quenett
patent: 4107366 (1978-08-01), Rieser et al.

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