Self-releasing, UV blocking surfacing materials for composite parts
AssigneeCytec Industries Inc.
InventorsJunjie Jeffrey Sang, Dalip K. Kohli
Life of this patent
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Abstract
A surfacing material that is capable of ultraviolet (UV) protection and self-releasing from a mold surface. The surfacing material is a multilayer structure composed of a curable resin layer laminated to a self-releasing layer. The surfacing material is designed to be co-cured with a composite substrate, for example, a prepreg layup. After co-curing, the composite part surfaced with the surfacing material is releasable from the mold surface with ease. The self-releasing layer functions as a UV blocking layer until the cured composite substrate is ready for painting. When the self-releasing layer removed, a paint-ready surface is revealed. Such surface does not require any surface preparation prior to painting.
Claims13
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.
Dependencies are inferred from the claim text.