US 12,202,234 B2
Exterior film of building for protecting glass
Changsuk Lee, Seoul (KR); Inhwan Oh, Seongnam-si (KR); Subin Park, Seoul (KR); and Jinwoo Choi, Seoul (KR)
Assigned to STEK CO., LTD., Seoul (KR)
Filed by STEK CO., LTD., Seoul (KR)
Filed on Jun. 9, 2022, as Appl. No. 17/836,864.
Prior Publication US 2023/0398770 A1, Dec. 14, 2023
Int. Cl. B32B 27/08 (2006.01); B32B 7/12 (2006.01); B32B 27/20 (2006.01); B32B 27/26 (2006.01); B32B 27/36 (2006.01); B32B 27/40 (2006.01); C08K 3/04 (2006.01); C08K 3/22 (2006.01); C08K 5/00 (2006.01); C08L 75/04 (2006.01); C09D 133/08 (2006.01); C09D 175/04 (2006.01); C09J 133/08 (2006.01); C09J 175/04 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 7/12 (2013.01); B32B 27/20 (2013.01); B32B 27/26 (2013.01); B32B 27/36 (2013.01); B32B 27/40 (2013.01); C09D 133/08 (2013.01); C09D 175/04 (2013.01); C09J 133/08 (2013.01); C09J 175/04 (2013.01); B32B 2250/03 (2013.01); B32B 2255/10 (2013.01); B32B 2255/205 (2013.01); B32B 2255/26 (2013.01); B32B 2307/42 (2013.01); B32B 2307/584 (2013.01); B32B 2307/762 (2013.01); B32B 2367/00 (2013.01); B32B 2375/00 (2013.01); C08K 3/04 (2013.01); C08K 3/22 (2013.01); C08K 2003/2231 (2013.01); C08K 2003/2258 (2013.01); C08K 3/2279 (2013.01); C08K 5/0025 (2013.01); C08K 5/005 (2013.01); C08L 75/04 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An exterior film of a building for protecting glass, the exterior film comprising:
a functional coating layer including a urethane-based material;
a base layer disposed under the functional coating layer and combined with thermoplastic polyurethane; and
a second adhesive layer disposed under the base layer and including an acrylic copolymer, a curing agent, a solvent, and a UV blocker,
wherein the base layer includes:
a TPU layer including thermoplastic polyurethane;
a first adhesive layer disposed under the TPU layer and including a urethane resin, a curing agent, carbon, a metal oxide, and a UV blocker; and
a metal treated PET layer disposed under the first adhesive layer and including metal-treated polyethylene terephthalate,
wherein the functional coating layer has a function of self-healing or preventing scratches generated on a surface of the exterior film; and,
wherein the first adhesive layer, which directly contacts the TPU layer and the metal treated PET layer, has a thickness of 5 to 30 micrometers and comprises 90 to 110 parts by weight of a urethane resin, 0.1 to 5 parts by weight of a curing agent, 1 to 20 parts by weight of carbon, 1 to 20 parts by weight of a metal oxide, and 1 to 10 parts by weight of a UV blocker.