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US 12,590,226 B2Granted
Adhesive composition and surface protection film
AssigneeXinmei Fontana Holding (Hong Kong) Limited
InventorsJeong Min Choi, Jang Soon Kim, Hyun Goo Kang, Jae Seung Lym
Life of this patent
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Abstract
The present disclosure provides an adhesive composition and a surface protective film including the same, which have low low-speed and high-speed peel forces and a high residual adhesion rate.
Claims13
An adhesive composition comprising:
- a hydroxyl group-containing urethane resin;
- an isocyanate-based curing agent;
- and
- a (meth)acrylate copolymer,
- wherein the (meth)acrylate copolymer is obtained by polymerization from a monomer mixture which contains a (meth)acrylate monomer containing a hydroxyl group, a (meth)acrylate monomer containing a fluorinated substituent, an alkyl (meth)acrylate monomer having 1 to 10 carbon atoms, and an alkyl (meth)acrylate monomer having 12 to 22 carbon atoms,
- wherein the (meth)acrylate copolymer has a weight-average molecular weight of 20,000 to 70,000,
- wherein the (meth)acrylate copolymer is contained in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of the hydroxyl group-containing urethane resin, and
- wherein a surface protective film comprising an adhesive layer formed from the adhesive composition has a peel force of 30 gf/in or less as measured at a peel angle of 180° and a peel speed of 20 m/min after attachment to glass.
5 more elements
Dependencies are inferred from the claim text.