Hollow plastic microspheres

Details Hollow plastic microspheres Hollow plastic microspheres

1979-12-13

1981-12-01

Lindsay, Jr., Robert L.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

126450, 428407, 521 54, 521 57, 521136, B32B 516, B22B 1706

Patent

active

043037364

ABSTRACT:
Hollow plastic microspheres made from thermoplastic or thermosetting plastic compositions are described.
The hollow plastic microspheres can be used as filler materials in plastics, in plastic foam compositions and in concrete and asphalt compositions. The hollow plastic microspheres can be made from low heat conductivity plastic compositions and blown with a low heat conductivity gas and used to make improved insulation materials and composites and insulating systems.
The hollow plastic microspheres can be made to contain a thin transparent or reflective metal coating deposited on the inner wall surface of the microspheres by adding to the blowing gas small dispersed metal particles and/or gases of organo metal compounds and decomposing the organo metal compounds.
The hollow plastic microspheres can also be made in the form of filamented plastic microspheres with a thin plastic filament connecting adjacent plastic microspheres.

REFERENCES:
patent: 948541 (1910-02-01), Coleman
patent: 1871792 (1932-08-01), Horsfield
patent: 3186812 (1965-06-01), Pfaender
patent: 3325341 (1967-06-01), Shannon
patent: 3607169 (1971-09-01), Coxe
patent: 3615972 (1971-10-01), Morehouse et al.
patent: 3769770 (1973-11-01), Deschamps et al.
patent: 4033324 (1977-07-01), Eckels
Materials Engineering, "Microspheres Cut Costs, Improve Properties of Plastics", pp. 58, 59, 4-1975.
Chemical Engineering, "Microencapsulation", pp. 177, 178, 12/1967.
Journal of Applied Physics, "Selection and Measurement of Microspheres Laser Targets on Refraction", vol. 47, #6, 6-1976, pp. 2502-2508.

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