PRESSURE-SENSITIVE ADHESIVE COMPOSITION, LAMINATE, AND SURFACE PROTECTION FILM
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United States of America Patent
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Issued Date -
Jun 13, 2024
app pub date -
Mar 24, 2022
filing date -
Apr 20, 2021
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Abstract
A pressure-sensitive adhesive composition that includes a styrenic block copolymer (A1) and an acrylic block copolymer (B), wherein (1) the melt viscosity of the styrenic block copolymer (A1) and the melt viscosity of the acrylic block copolymer (B) satisfy a specific relationship, (2) the mass ratio between the content of the styrenic block copolymer (A1) and the content of the acrylic block copolymer (B) in the pressure-sensitive adhesive composition is in a specific relationship, (3) the styrenic block copolymer (A1) is a hydrogenated product of a block copolymer (P1) including a specific polymer block, and (4) the acrylic block copolymer (B) includes a specific polymer block and has a number average molecular weight in a specific range.
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