US 12,441,908 B2
Multilayer paint protection film for vehicle
Nam Hoon Kim, Ansan-si (KR)
Assigned to AMTE CO., LTD, Yesan-Gun (KR)
Filed by AMTE CO.,LTD, Chungcheongnam-do (KR)
Filed on Apr. 18, 2023, as Appl. No. 18/135,929.
Claims priority of application No. 10-2022-0050120 (KR), filed on Apr. 22, 2022.
Prior Publication US 2023/0340294 A1, Oct. 26, 2023
Int. Cl. C09J 7/20 (2018.01); C09D 7/20 (2018.01); C09D 7/48 (2018.01); C09D 175/06 (2006.01); C09J 7/25 (2018.01)
CPC C09D 175/06 (2013.01) [C09D 7/20 (2018.01); C09D 7/48 (2018.01); C09J 7/25 (2018.01); C09J 2301/302 (2020.08); C09J 2475/001 (2013.01); Y10T 428/2848 (2015.01); Y10T 428/2891 (2015.01); Y10T 428/31554 (2015.04)] 9 Claims
 
1. A paint protection film comprising:
a coating layer comprising a polycaprolactone-based polyurethane formed of a coating solution in which first and second compositions are mixed;
a base layer comprising a polyester-based thermoplastic polyurethane; and
an adhesive layer,
wherein the first composition has a viscosity in a range of 1 cPs to 10 cPs at a temperature of 25° C. and comprises: 75 parts to 185 parts by weight of an ester-based solvent, 10 parts to 80 parts by weight of a ketone-based solvent, and 60 parts to 160 parts by weight of a glycol ester-based solvent, with respect to 100 parts by weight of a polycaprolactone triol,
the second composition has a viscosity in a range of 40 cPs to 50 cPs at a temperature of 25° C. and comprises: 10 parts to 35 parts by weight of an aromatic hydrocarbon-based solvent and 10 parts to 35 parts by weight of an ester-based solvent, with respect to 100 parts by weight of hexamethylene diisocyanate,
the first composition comprises a non-volatile phase in an amount in a range of 20% to 30% by weight,
the second composition comprises a non-volatile phase in an amount in a range of 60% to 80% by weight, and
a weight ratio of the first composition to the second composition is in a range of 2.5:1 to 3.5:1.