Interlayer film for laminated glass and laminated glass

Details Interlayer film for laminated glass and laminated glass Interlayer film for laminated glass and laminated glass

2007-10-09

2008-12-23

Nakarani, D. S (Department: 1794)

Stock material or miscellaneous articles

Composite

Of quartz or glass

C428S436000, C524S306000, C524S314000, C524S315000

Reexamination Certificate

active

07468209

ABSTRACT:
The invention provides an interlayer film for a laminated glass and a laminated glass,which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range.An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin,which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, andwhich has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %.An interlayer film for a laminated glasswhich shows a temperature dependence of loss tangentin which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.

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