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US 10,208,226 B2Granted
Composites transmissive to visual and infrared radiation and compositions and methods for making the composites
AssigneeThe Boeing Company
InventorsAndrew P. Nowak, April R. Rodriguez, Erin E. Stache, Russell P. Mott, Adam F. Gross
Life of this patent
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Abstract
A composition comprising a cyclic olefin copolymer; a particulate filler dispersed in the cyclic olefin copolymer; and a solvent is disclosed. The composition can be used to make a transmissive composite. The transmissive composite and a method of making a transmissive composite panel are also disclosed.
Claims20
A transmissive composite, comprising:
- a cyclic olefin copolymer matrix, wherein the cyclic olefin copolymer is a copolymer of at least one cyclic olefin and at least one unsaturated, linear or branched olefin, wherein the at least one cyclic olefin is a monomer chosen from Norbomene, Dicyclopentadiene, Styrene, Cyclohexadiene, Vinyl norbornene, Norbornadiene, and Cyclopentene;
- and the at least one unsaturated, linear or branched olefin is a monomer chosen from ethylene and C3 to C10α-olefins;
- and
- a particulate filler dispersed in the matrix, wherein the particulate filler comprises at least one material chosen from germanium, CaF2, NaCI, KCI, KBr, diamond, Si, Caesium Iodide (Csl), MgO, MgF2, LiF, BaF2, Thallium Bromoiodide (ThBrI), and Thallium Bromochloride (ThBrCI), the particulate filler including a ligand shell made from one or more ligands attached to the particulate filler, the one or more ligands being chosen from alkyl amines, alkyl carboxylic acids and —RSH, where R is a saturated or unsaturated, linear, branched or cyclic hydrocarbon moiety,
- wherein the composite as in a form of a panel, the panel being transparent in the visual spectrum and at IR wavelengths ranging from about 4 microns to about 12 microns.
2 more elements
A method of making a transmissive composite panel, the method comprising:
- i) depositing a layer of a composite mixture on a substrate, the composite mixture comprising a) a cyclic olefin copolymer, b) a particulate filler, and c) a solvent;
- ii) drying the layer;
- iii) repeating i) and ii) one or more times to form a thin film stack;
- and
- iv) heating the thin film stack at an annealing temperature and an annealing pressure to consolidate the film stack into a single composite layer,
- wherein the cyclic olefin copolymer is a copolymer of at least one cyclic olefin and at least one unsaturated, linear or branched olefin, wherein the at least one cyclic olefin is a monomer chosen from Norbornene, Dicyclopentadiene, Styrene, Cyclohexadiene, Vinyl norbomene, Norbomadiene, and Cyclopentene;
- and the at least one unsaturated, linear or branched olefin is a monomer chosen from ethylene and C3 to C10 α-olefins;
- and
- wherein the particulate filler comprises at least one material chosen from germanium, CaF2, NaCI ,KCI, KBr, diamond, Si, Caesium Iodide (Csl),MgO,MgF2, LiF, BaF2, Thallium Bromoiodide (ThBrl), and Thallium Bromochloride (ThBrCI), the particulate filler including a ligand shell made from one or more ligands attached to the particulate filler, the one or more ligands being chosen from alkyl amines, alkyl carboxylic acids and —RSH, where R is a saturated or unsaturated, linear, branched or cyclic hydrocarbon moiety,
- wherein the panel is transparent in the visual spectrum and at IR wavelengths ranging from about 4 microns to about 12 microns.
7 more elements
Dependencies are inferred from the claim text.