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Title:
SURFACE-PROTECTION-SHEET ADHESIVE COMPOSITION AND SURFACE PROTECTION SHEET
Document Type and Number:
WIPO Patent Application WO/2020/066866
Kind Code:
A1
Abstract:
Provided is a surface-protection-sheet adhesive composition for a surface protection sheet in which a crack does not occur when being cut, in addition to: exhibiting low haze; being easily laminated; being easily peeled off; and being capable of suppressing the occurrence of adhesive residue after being peeled off. The present invention provides a surface-protection-sheet adhesive composition that contains: 30-60% by mass of a polyurethane (A); 2-10% by mass of a polyfunctional monomer (B); 30-68% by mass of another monomer (C) that is polymerizable with the polyurethane (A) and the polyfunctional monomer (B); and 0.1-5 parts by mass of a photopolymerization initiator (D) with respect to the total amount, that is, 100 parts by mass, of the substances (A)-(C). The surface-protection-sheet adhesive composition is characterized in that the polyurethane (A) has a skeleton including a structure originating from a polyoxyalkylene polyol and a structure originating from a polyisocyanate, has (meth)acryloyl groups at a plurality of termini thereof, and has a weight average molecular weight of 30,000-200,000.

Inventors:
IKEYA TATSUHIRO (JP)
SASAKI KAZUHIRO (JP)
NAKANISHI KENICHI (JP)
Application Number:
JP2019/036884
Publication Date:
April 02, 2020
Filing Date:
September 20, 2019
Export Citation:
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Assignee:
SHOWA DENKO KK (JP)
International Classes:
C09J175/04; C09J4/02; C09J7/38
Domestic Patent References:
WO2019069746A12019-04-11
Foreign References:
JP2018095770A2018-06-21
JP2018053212A2018-04-05
JP2014210895A2014-11-13
Attorney, Agent or Firm:
OIKAWA Shu et al. (JP)
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