Coating processes – Electrical product produced – Welding electrode
Patent
1986-03-19
1987-04-14
Newsome, John H.
Coating processes
Electrical product produced
Welding electrode
427 44, 522 25, 522 31, 522170, B05D 306
Patent
active
046577793
ABSTRACT:
An ultraviolet-curable liquid coating composition which possesses minimal substrate deformational shrinkage on cure is disclosed in which (A) a cationically curable polyepoxide having a 1,2-epoxy equivalency of at least 1.3 is used in admixture with (B) an acrylate-functional compound which is either (1) a monoacrylate-functional compound carrying at least two primary hydroxy groups; or (2) an epoxy-functional monoacrylate in admixture with a compound carrying a plurality of primary hydroxyl groups. An acrylate-functional liquid (C), preferably a monoacrylate, is used to provide coating viscosity, and a catalyst component capable of initiating, on ultraviolet exposure, both the conventional free-radical polymerization of ethylenically unsaturated monomers, and the cationic polymerization of polyepoxides in the presence of a compound carrying the primary hydroxy group. This catalyst component usually comprises a radiation sensitive aromatic onium salt capable of releasing a Lewis acid when exposed to radiant energy, together with an effective amount of a ketonic free radical photoinitiator when the onium salt is ineffective to perform this function. This provides a two stage cure in which shrinkage is minimized to control curling and cupping of easily deformable coated substrates.
REFERENCES:
patent: 4156035 (1979-05-01), Tsao et al.
patent: 4218531 (1980-08-01), Carlson
patent: 4245029 (1981-01-01), Crivello
patent: 4256828 (1981-03-01), Smith
patent: 4303696 (1981-12-01), Brack
patent: 4423136 (1983-12-01), Crivello et al.
patent: 4576850 (1986-03-01), Martens
patent: 4582885 (1986-04-01), Barber
DeSoto, Inc.
Newsome John H.
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