U.V. curable poly(ester-urethane) polyacrylate polymers and wet

Details U.V. curable poly(ester-urethane) polyacrylate polymers and wet U.V. curable poly(ester-urethane) polyacrylate polymers and wet

1976-05-11

1978-02-07

Newsome, John H.

Coating processes

Electrical product produced

Welding electrode

427 53, 260859R, 20415915, 20415923, B05D 306

Patent

active

040727700

ABSTRACT:
Polyester-urethane polymers, prepared from the reaction of specific molar ratios of diisocyanates with specific mixtures of polyesterdiols, glycols, triols and tetraols, and having 4-10 reactive isocyanate groups are further reacted with hydroxyalkyl acrylates through the free isocyanate functionality to provide oligomers having from about 4-10 acrylates units per each mole unit of polyurethane chain. Such polymers when crosslinked under ultraviolet radiation in the presence of photosensitizers, specific reactive monofunctional acrylate solvents and multifunctional acrylate cross-linking agents cure without air inhibition to yield superior "wet look" finishes especially useful for coating metal, wood and floor tile.

REFERENCES:
patent: 3673140 (1972-06-01), Ackerman et al.
patent: 3954714 (1976-05-01), Kuehn

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