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Patent Searching and Data


Title:
HOT-MELT COMPOSITION AND SEALING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2020/080280
Kind Code:
A1
Abstract:
Provided is a hot-melt composition as a hydrocarbon oil, the hot-melt composition containing, with respect to 100 parts by mass of a hydrogenated styrene-based thermoplastic elastomer having a styrene-based polymer block at both ends and a hydrogenated diene polymer block in the middle and having a weight average molecular weight (Mw) of 250,000-600,000, (B) 150-450 parts by mass of an aromatic tackifying resin having a softening point of 135-160°C and a weight average molecular weight of 500-2,500, (C) 100-500 parts by mass of a tackifying resin which has a softening point of 100-160°C and is for a hydrogenated diene polymer block, and (D) 500-1,500 parts by mass of a non-aromatic hydrocarbon oil having a kinematic viscosity of at least 90 mm2/s at 40°C, wherein 30 mass% or more of the (D) non-aromatic hydrocarbon oil has a kinematic viscosity of 300-500 mm2/s at 40°C. The hot-melt composition has excellent sealing properties, is easily dismantlable, and is suitable as a sealing material used for manufacturing lighting equipment for automobiles, etc.

Inventors:
KUMON DAISUKE (JP)
NAKAGAWA AKITO (JP)
Application Number:
PCT/JP2019/040193
Publication Date:
April 23, 2020
Filing Date:
October 11, 2019
Export Citation:
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Assignee:
ASAHI CHEMICAL SYNTHETIC CO LTD (JP)
International Classes:
C08L53/02; C08L25/02; C08L91/00; C09J11/06; C09J11/08; C09J153/02; C09K3/10
Domestic Patent References:
WO2015159912A12015-10-22
Foreign References:
JP2017179061A2017-10-05
JP2017186527A2017-10-12
JP2016088971A2016-05-23
JP2017057382A2017-03-23
JP2011080021A2011-04-21
JP2001081277A2001-03-27
JP2008127473A2008-06-05
JP2006249433A2006-09-21
JP2011190287A2011-09-29
JP2017179061A2017-10-05
JP2017214479A2017-12-07
Other References:
See also references of EP 3798262A4
Attorney, Agent or Firm:
MAEDA & SUZUKI (JP)
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