POLYVINYL ACETAL RESIN FILM FOR LAMINATED GLASS

WIPO Patent Application WO/2018/181389

A1

The present invention relates to a polyvinyl acetal resin film for laminated glass, the polyvinyl acetal resin film having a thickness of 10-350 µm, wherein the viscosity of a solution, in which toluene/ethanol=1/1 (mass ratio) and the concentration of a polyvinyl acetal resin in a resin composition constituting the polyvinyl acetal resin film is 10 mass%, is 100-1000 mPa⋅s as measured at 20°C and 30 rpm using a Brookfield-type (B-type) viscometer, the amount of a plasticizer in the polyvinyl acetal resin film is 0-20 mass% on the basis of the total mass of the resin composition constituting the polyvinyl acetal resin film, the average spacing Sm value of recesses and protrusions on at least one surface is at least 500 μm, and the ratio Sm/Rz of the average spacing Sm value of the recesses and protrusions on at least one surface with respect to the ten-point average roughness Rz value is at least 200.

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ISOUE KOICHIRO (JP)
KOISHIKAWA JUN (JP)
YASUDA HIROTAKA (JP)
KELLER UWE (DE)

PCT/JP2018/012560

October 04, 2018

March 27, 2018

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KURARAY CO (JP)

C03C27/12; C08L59/00

WO2016052603A1	2016-04-07
WO2015019438A1	2015-02-12
WO2015059828A1	2015-04-30
WO2004063231A1	2004-07-29
WO2003020776A1	2003-03-13

JP2000203901A	2000-07-25
JP2003503236A	2003-01-28
JPH051108A	1993-01-08
JP2013056811A	2013-03-28
JP2013516043A	2013-05-09
US20160288459A1	2016-10-06
EP1527107A1	2005-05-04
EP1606325A1	2005-12-21
EP1235683A1	2002-09-04

See also references of EP 3604254A4

SAMEJIMA, Mutsumi et al. (JP)

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