FIELD: chemistry.
SUBSTANCE: composite particles include individual, hollow, ceramic spheroids and a fluoropolymer layer. The fluoropolymer is a homopolymer or copolymer of perfluoroalkyl vinyl ether; perfluoroalkoxy vinyl ether; at least one fluoroolefin, independently represented by the formula C(R)2=CF-Rf, wherein Rf is fluorine or a perthoroalkyl having from 1 to 8 carbon atoms and R is hydrogen, fluorine or chlorine; or a combination thereof. The composite material includes a plurality of composite particles distributed in the matrix material. The matrix material comprises at least one of the following materials: polyethylene, polypropylene, silicone rubber, polystyrene, epoxy or phenolic.
EFFECT: obtaining syntactic foams for insulation, for example, deep-water insulation, with increased strength, used, for example, in oil and gas production.
21 cl, 4 dwg, 3 tbl, 8 ex
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