Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1975-05-13
1978-08-29
Tillman, Murray
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
427 36, 427180, 427185, 427195, 428421, 428463, 526 18, 526 58, C08F 254
Patent
active
041101863
ABSTRACT:
Melt-processible fluorinated ethylene-propylene copolymer powders may be rendered more adherent to substrates, particularly metal substrates, by irradiating the copolymer powder with about 0.5 to 6 megarads of radiation, and preferably about 2 to 4 megarads. The copolymer powder should have a maximum particle size of about 420 microns, and the particles should preferably range in diameter from about 177 to 420 microns. The irradiation increases the melt index of the copolymer, preferably by a factor of about 2 to 10. As a result, the powder has improved flow properties and may be more easily milled to a smaller particle size for application to a substrate. The adhesion of the irradiated powder to metal substrates is improved by a factor of about 2 to 3.
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patent: 3840619 (1974-10-01), Arnoff et al.
patent: 3846267 (1974-11-01), Tabata et al.
patent: 3878164 (1975-04-01), Lott
patent: 3894118 (1975-07-01), Arnoff et al.
patent: 3962373 (1976-06-01), Petrucelli
Arkles Barry C.
Gerakaris Stephen
Beatrice Foods Co.
Page Thurman K.
Tillman Murray
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