Ultraviolet curable aqueous coatings
AssigneeMobil Oil Corporation
InventorWilliam H. McCarty
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Abstract
Ultraviolet curable aqueous coating solutions are provided in which an hydroxy functional ethylenically unsaturated material, such as hydroxy ethyl acrylate or a polyether or polyester thereof, is dissolved in water with the aid of an amine photoinitiator and a photosensitizer is incorporated in the composition, preferably by reacting the hydroxy functionality in the ethylenically unsaturated material with a tetracarboxylic acid dianhydride including a proportion of benzophenone tetracarboxylic dianhydride which provides the needed ultraviolet photosensitizer.
Claims12
An ultraviolet curable aqueous coating solution comprising an hydroxy functional ethylenically unsaturated ultraviolet curable material reacted with a polycarboxylic acid or anhydride and dissolved in water with the aid of an amine photoinitiator, said ultraviolet curable material being monoethylenic or polyethylenic and monohydric or polyhydric and having a molecular weight providing a viscosity ranging from a fluid liquid to a viscous semi-solid, the proportion of said polycarboxylic acid or anhydride providing an acid number of from 20-300, and said amine providing a pH of from 6.0-11.0, said solution further containing a photosensitizer rendering the composition sensitive to ultraviolet light.
An ultraviolet curable aqueous coating solution comprising the reaction product of an hydroxy acrylate with an approximately stoichiometric proportion of tetracarboxylic dianhydride consisting essentially of benzophenone tetracarboxylic acid dianhydride, said reaction product being dissolved in water with the aid of a tertiary amine photoinitiator.
An ultraviolet curable addition reaction product of hydroxy C.sub.2 - C.sub.4 alkyl monoacrylate and hydroxy ethers or esters thereof, with an approximately stoichiometric proportion of tetracarboxylic acid dianhydride comprising benzophenone tetracarboxylic acid dianhydride providing from 5% to 40% of the anhydride functionality.
Dependencies are inferred from the claim text.