HOT-MELT COMPOSITION AND SEALING MATERIAL

WIPO Patent Application WO/2019/031290

A1

This hot-melt composition contains, per (A) 100 parts by mass of a hydrogenated styrene-based thermoplastic elastomer having a styrene-based polymer block at both ends thereof and a hydrogenated diene polymer block at a middle portion thereof, and having a mass-average molecular weight of 250,000-600,000, (B) 20-150 parts by mass of a first styrene-based tackifying resin having a softening point of 135-160ºC, (C) 100-400 parts by mass of a second styrene-based tackifying resin having a softening point of 105-135ºC, (D) 100-500 parts by mass of a third tackifying resin for the hydrogenated diene polymer block and having a softening point of 100-160ºC, and (E) 500-1,500 parts by mass of a liquid softener. The hot-melt composition has excellent adhesiveness and dismantlability, and is a material suitable as a sealing material for an illumination device for a car, etc.

JP2512648	INDUSTRIAL APPLICABILITY: Improved polyphenylene ether-polyester resin composition
JP7422904	Compositions, methods of making them, and articles made therefrom
JPH04227930	LACTAM MIXTURE WITH INCREASED MELT VISCOSITY

YAMAUCHI TOMONOBU (JP)
FURUKAWA KAZUYA (JP)
KUMON DAISUKE (JP)
KOGA TAKASHI (JP)

PCT/JP2018/028468

February 14, 2019

July 30, 2018

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ASAHI CHEMICAL SYNTHETIC CO LTD (JP)

C08L53/02; C08L25/04; C09K3/10

JP2011162747A	2011-08-25
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JPH11323296A	1999-11-26
JPH09286964A	1997-11-04
JP2006143870A	2006-06-08
JPH08157794A	1996-06-18
JP2001081277A	2001-03-27
JP2008127473A	2008-06-05
JP2006249433A	2006-09-21
JP2011190287A	2011-09-29

See also references of EP 3650500A4

MAEDA & SUZUKI (JP)

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