Ashland Licensing and Intellectual Property LLC

Ashland, Inc.

Michael L Gould

Sridevi Narayan-Sarathy

Alexandre Mejiritski

Dustin B Martin

Thomas L Marino

Laurence G Dammann

Matthew S Sheridan

Terry Emerson Hammond

Lisa M Hahn

The liquid, uncrosslinked, UV-curable Michael addition resins and blends of the present invention exhibit performance properties that make them very effective coating materials and these properties can be modified greatly depending upon composition. Michael donors and acceptors can be constructed from Type I and/or Type II photoinitiators and can be included in the coating compositions disclosed to make UV-curable coatings with extraordinary photoreactivity and properties. Resins can be produced that show excellent adhesion to metals, plastics, wood, paper and glass. They exhibit wide ranges of hardness, toughness, flexibility, tensile strength, stain resistance, scratch resistance, impact resistance, solvent resistance, etc. Almost any desired coating performance parameter can be attained by proper selection of raw material building blocks.

Radiation curable Michael addition resins having built-in photoinitiators

The present invention relates to radiation-curable overprint varnishes for printed substrates based on multifunctional, uncrosslinked, liquid Michael addition resins. The compositions are UV-curable with little or no photoinitiator present.

Radiation-curable high gloss overprint varnish compositions

The invention detailed herein comprises a family of radiation-curable coating formulations specifically for metal substrates. These coating formulations are based on multifunctional acrylate resins formed by the reaction of acrylate monomers and oligomers with &#xff;-keto esters (e.g., acetoacetates), &#xff;-diketones (e.g., 2, 4-pentanedione), &#xff;-keto amides (e.g., acetoacetanilide, acetoacetamide), and/or other &#xff;-dicarbonyl compounds that can participate in the Michael addition reaction. An essential novelty of these coating resins is that they will cure under standard UV-cure conditions without the addition of traditional photoinitiators. Other materials, both reactive (conventional acrylates) and non-reactive (e.g., solvents) may also be incorporated into the resin oligomers to enhance the coatings properties on metal substrates. These materials include a variety of acrylic monomers and oligomers, primary, secondary and tertiary amines, acid-functional monomers and oligomers, silicones, waxes and elastomers, among others. Coatings based on these novel multifunctional acrylate resins exhibit excellent adhesion and shrinkage control, flexibility, solvent resistance, scratch and mar resistance, impact resistance, color, and durability across a wide range of plastic materials. These coatings may be cured via chemical means, thermally, or by exposure to UV or electron beam radiation.

Radiation-curable coatings for metal substrates from multifunctional acrylate oligomers

The invention detailed herein comprises a family of multifunctional acrylate oligomers which are useful as pigment grinding vehicles for use in radiation-curable coating formulations. The multifunctional acrylate resins are formed by the reaction of acrylate monomers and oligomers with &#x3b2;-keto esters (e.g., acetoacetates), &#x3b2;-diketones (e.g., 2,4-pentanedione), &#x3b2;-keto amides (e.g., acetoacetanilide, acetoacetamide), and/or other &#x3b2;-dicarbonyl compounds or Michael 'donors' that can participate in the Michael addition reaction. These resin vehicles have a built-in chromophore that enables ink formulations made from their dispersions to cure under standard UV-cure conditions with significantly less photoinitiator than commercial formulations. The resins also exhibit excellent pigment wetting characteristics and can be designed to function as a single dispersion vehicle for different pigments and different ink applications such as screen, flexographic, and lithographic printing.

Multifunctional acrylate oligomers as pigment grinding vehicles for radiation-curable ink applications

The present invention relates to radiation-curable coating formulations specifically for plastic substrates. The present invention specifically relates to resinous Michael addition products of &#x3b2;-dicarbonyl compounds and Lewis-functional multifunctional acrylate esters. The present invention further relates to methods of fabricating and using the inventive compounds.

Radiation-curable coatings for plastic substrates from multifunctional acrylate oligomers

Self-photoinitiating liquid oligomeric compositions are disclosed. The oligomeric compositions are formed from multifunctional mercaptans and Michael addition polyacrylate resins, synthesized from multifunctional acrylates and &#x3b2;-dicarbonyl Michael donors, specifically &#x3b2;-keto esters, &#x3b2;-diketones, &#x3b2;-ketoamides or &#x3b2;-ketoanilides or combinations thereof The oligomeric compositions are provided along with uses thereof and methods of fabricating.

Dual cure reaction products of self-photoinitiating multifunctional acrylates with thiols and synthetic methods

The uncrosslinked liquid oligomeric compositions of this invention are made by the Michael addition reaction of acetoacetate-functional donor compounds with multifunctional acrylate acceptor compounds where the equivalent ratios of multifunctional acrylate to acetoacetate vary from &gE;1:1 to &gE;13.2:1 depending on the functionality of both multifunctional acrylate and acetoacetate in the presence of a catalyst comprising an epoxy moiety and a quaternary salt. Unusable gelled or cured oligomer products occur below the claimed ranges. The liquid oligomers of this invention are further crosslinked to make coatings, laminates and adhesives.

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Powell, OH, United States of America

Michael L Gould