US 12,109,789 B2
Self-releasing, UV blocking surfacing materials for composite parts
Junjie Jeffrey Sang, Newark, DE (US); and Dalip K. Kohli, Churchville, MD (US)
Assigned to CYTEC INDUSTRIES INC., Princeton, NJ (US)
Appl. No. 16/482,907
Filed by CYTEC INDUSTRIES INC., Princeton, NJ (US)
PCT Filed Dec. 20, 2018, PCT No. PCT/US2018/066641
§ 371(c)(1), (2) Date Aug. 1, 2019,
PCT Pub. No. WO2019/133405, PCT Pub. Date Jul. 4, 2019.
Claims priority of provisional application 62/610,391, filed on Dec. 26, 2017.
Prior Publication US 2020/0316823 A1, Oct. 8, 2020
Int. Cl. B32B 27/38 (2006.01); B29C 37/00 (2006.01); B29C 70/00 (2006.01); B29C 70/30 (2006.01); B32B 9/00 (2006.01); B32B 15/092 (2006.01); B32B 27/20 (2006.01); B29K 63/00 (2006.01); B29K 101/12 (2006.01); B29K 509/02 (2006.01)
CPC B32B 27/38 (2013.01) [B29C 37/0032 (2013.01); B29C 37/0075 (2013.01); B29C 70/003 (2021.05); B29C 70/30 (2013.01); B32B 9/007 (2013.01); B32B 15/092 (2013.01); B32B 27/20 (2013.01); B29K 2063/00 (2013.01); B29K 2101/12 (2013.01); B29K 2509/02 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2264/108 (2013.01); B32B 2307/71 (2013.01); B32B 2307/748 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A self-releasing surfacing material that is capable of ultraviolet (UV) protection, comprising a curable resin layer laminated to a releasable layer,
wherein
the curable resin layer comprises one or more thermoset resins,
the releasable layer is consisted of a polymer layer coated on one side or both sides with a coating of fluoropolymer,
wherein the polymer layer is formed from a material selected from the group consisting of: thermoplastic polyester elastomers; mixture of polypropylene and ethylene-propylene-diene rubber (EPDM/PP); mixture of natural rubber and polypropylene (NR/PP); mixtures of nitrile rubber and polypropylene (NBR/PP); mixtures of ethylene-vinyl acetate and polyvinylidene chloride (EVA/PVDC); and combinations thereof;
the fluoropolymer is selected from the group consisting of: polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polyvinylfluoride (PVF), fluorinated ethylene-propylene (FEP), polychlorotrifluoroethylene (PCTFE), perfluoroalkoxy polymer (PFA), polyethylenetetrafluoroethylene (ETFE), polyethylenechlorotrifluoro-ethylene (ECTFE), perfluoropolyether (PFPE), and combinations thereof, and
the releasable layer is positioned such that one coating of fluoropolymer is an outermost layer with an exposed surface.