Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1974-10-17
1976-03-09
Turer, Richard B.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415914, 20415915, 20415918, 20415919, 20415922, 20415924, 204181, 260 775CR, 260 8075, 260856, 427 54, 428461, C08F 246, C08F 400
Patent
active
039430464
ABSTRACT:
Process and apparatus for polymerizing oxygen-inhibited ultraviolet photopolymerizable resin-forming material such as a film is shown. The apparatus comprises a pair of U.V. light sources, one being a flash photolysis source, the other a sustained photolysis source, both disposed for irradiating said mass as it abides in an atmosphere such as air which tends to inhibit such polymerization. The process has two essential phases, a superficial phase and a profound phase, performed simultaneously or one in advance of and as preparation for the other. The profound phase is performed with sustained irradiation effective for substantially completely polymerizing said material except for inhibition of polymerization at the surface thereof due to said atmosphere. The superficial phase is performed with flash irradiation effective for forming a tack-free skin over said material. Said skin helps to protect the less fully polymerized material therebelow from oxygen inhibition when such superficial phase is performed first or simultaneously with the other phase. When such superficial phase is performed after the profound phase, said superficial phase acts to complete polymerization of said material throughout its thickness.
REFERENCES:
patent: 3405045 (1968-10-01), Hoskins
patent: 3840448 (1974-10-01), Osborn et al.
De Sorga Miksa
McGinniss Vincent D.
Schmitz Thomas M.
SCM Corporation
Turer Richard B.
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