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Surfacing film for composite structures and method of making the same

A composite structure and surface film technology, applied in chemical instruments and methods, synthetic resin layered products, novolac epoxy resin adhesives, etc., can solve problems such as trouble, surface film expansion, bubbling repainting process, etc.

Active Publication Date: 2014-08-13
CYTEC TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Those strippers can cause swelling and / or bubbling of the surface film and can make the repainting process more troublesome

Method used

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  • Surfacing film for composite structures and method of making the same
  • Surfacing film for composite structures and method of making the same
  • Surfacing film for composite structures and method of making the same

Examples

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example

[0055] The following examples are intended to give specific examples of surface films formed according to the present invention, but are not intended to limit the scope of the present invention in any way.

[0056] Nine surface film samples were prepared according to the formulations (1-9) shown in Table 2. All amounts are expressed in percent by weight.

[0057] Table 2

[0058]

[0059]

[0060] Each surface film was prepared by adding the components disclosed in Table 2 to a mixing vessel and mixing the components using a high shear laboratory mixer. Add the epoxy first. MEK was added as a solvent to the epoxy resin mixture as necessary to adjust the rheology and solids content of the composition. Subsequently, a toughening agent (pre-reacted adduct and / or PES-PEES copolymer) is added to the epoxy resin. In some surface films (Formulations 4 and 5), a conductive additive (silver flakes or Ag-Cu flakes) was also added to the mixing vessel. Ceramic microspheres, fu...

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Abstract

A surfacing film is formed from a curable resin composition. The resin composition comprises 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.

Description

Background technique [0001] The present invention generally relates to composite surface films. More specifically, the present invention relates to surface membranes for fiber reinforced polymer matrix composite structures. [0002] Fiber-reinforced polymer matrix composites (PMCs) are high-performance structural materials commonly used in applications requiring resistance to aggressive environments, high strength and / or low weight. Examples of these applications include aircraft components (such as tails, wings, fuselages, and propellers), high-performance automobiles, boat hulls, and bicycle racks. [0003] Conventional composite structures used in the aerospace industry often include surface films to provide desired performance characteristics to the composite structure prior to painting. Use these surface films to improve the surface quality of structural parts while reducing labor, time and cost. Surface films are often co-cured with polymer matrix composites during fa...

Claims

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Application Information

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IPC IPC(8): C08G59/18C08G59/32C08G59/40C09D163/00
CPCY10T442/674Y10T442/679B32B2260/023C08K2201/005B32B2307/71B32B2605/00B32B27/36C08G59/4021Y10T428/252C08G59/182B32B2270/00B32B5/26B32B2264/107C09D163/04B32B27/286B32B2262/101B32B2264/102B32B5/022B32B7/12B32B27/08C09J163/04B32B27/12B32B2307/4026B32B27/18C08G59/32B32B27/38B32B2307/202C08K5/17C08K7/18C08L63/00C08J5/243C08L21/00C08L81/06B29C37/0025B29C70/34B29K2063/00B29K2105/0872B29K2105/16B29K2509/02B29L2009/00B32B27/20B32B2255/10C08L63/04C08L2203/16
Inventor 俊杰·杰弗里·桑达利普·库马尔·科利
Owner CYTEC TECH CORP
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