Surfacing film for composite structures and method of making the same
AssigneeCytec Technology Corp.
InventorsJunjie Jeffrey Sang, Dalip Kumar Kohli
Life of this patent
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Abstract
A surfacing film is formed from a curable resin composition containing an epoxy novolac resin, a tri-functional or tetra-functional epoxy resin, ceramic microspheres, an amine-based curing agent, particulate inorganic fillers; and a toughening component. The surfacing film exhibits high Tg and high cross-linked density after curing, as well as high resistance to paint stripper solutions. The surfacing film is suitable for co-curing with fiber-reinforced resin composite materials. The surfacing film may optionally contain electrically conductive additives to provide sufficient conductivity for lightning strike protection (LSP) or electromagnetic interference (EMI) shielding.
Claims14
A surfacing film with resistance to alcohol-based paint strippers, said surfacing film comprising:
- an epoxy novolac resin having epoxy functionality of more than one;
- a tri-functional or tetra-functional epoxy resin;
- ceramic microspheres
- a latent amine-based curing agent;
- particulate inorganic fillers;
- and
- a pre-react adduct formed by the reaction of diglycidylether of tetrabromo Bisphenol A, bisphenol A, and an elastomer selected from:
- amine-terminated butadiene acrylonitrile (ATBN);
- carboxyl-terminated butadiene acrylonitrile (CTBN), and carboxyl-terminated butadiene (CTB).
Dependencies are inferred from the claim text.