Photopolymerizable epoxide coating compositions containing titan

Details Photopolymerizable epoxide coating compositions containing titan Photopolymerizable epoxide coating compositions containing titan

1980-02-20

1981-09-01

Newsome, John H.

Coating processes

Electrical product produced

Welding electrode

430280, 430914, B05D 306

Patent

active

042872286

ABSTRACT:
An epoxide coating composition which is relatively stable to ambient white light and activated upon exposure to ultraviolet light to produce a hard glossy coating includes a cationically polymerizable material consisting at least principally of an epoxide prepolymer. Also included are a titanium dioxide pigment and a photoinitiator component including a first photoinitiator compound selected from the class consisting of hexafluorophosphate, fluoroborate, fluoroantimonate or fluoroarsenate salts of the following diazonium compounds: 2,5-diethoxy-4-p-tolylmercaptobenzene diazonium, 4-chloro-2,5-dimethoxybenzene diazonium, 2,5-dimethoxybenzene diazonium, 2,5-dimethoxy-4-p-tolylbenzene diazonium and 2,5-dibutoxy-4-benzamidobenzene diazonium, and mixtures thereof. The preferred compositions additionally contain a second photoinitiator compound which is relatively stable to radiation having a wavelength of at least 355 nanometers and decomposable by radiation in the range of 200-355 nanometers. Coatings of the foregoing compositions containing certain epoxidic esters and epoxidic ethers are curable at ambient temperature to a hard glossy surface within one minute.

REFERENCES:
patent: 3708296 (1973-01-01), Schlesinger
patent: 4054498 (1977-10-01), Tarwid
patent: 4107353 (1978-08-01), Karoly et al.

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