Scm Corporation

Vincent W Ting

James T Woo

James M Evans

Richard M Marcinko

Vincent D McGinniss

David A Borovicka, Sr

Ann F Kah

Provides new and improved water-reducible coating compositions and methods of making them. Three preferred processes are disclosed. These differ in the manner of incorporating and chemical nature of an extender polymer. Broadly, the process of the invention is one for forming an aqueous dispersion of a fluent resinous composition of

Base for a graft polymer, novel graft polymer compositions, solvent and

Sanitary coatings based on self-emulsifiable epoxy ester copolymers are produced by esterifying a solvent-soluble carboxyl polymer with an epoxy resin in an organic resin and in the presence of at least about 2% amine catalyst to provide a carboxyl-functional epoxy polymer which can be reacted with a base and dispersed into water.

Aqueous epoxy ester emulsions

Base for a graft polymer, novel graft polymer compositions, solvents and

A base-functional graft polymer-containing resinous reaction product is made by incorporating an amine in a graft polymer molecule. An epoxy resin is reacted with ethylenically unsaturated monomer in the presence of a free radical initiator having hydrogen abstraction capability, to form a graft polymer resinous reaction product. The monomer may comprise a copolymerizable unsaturated amine or an unsaturated epoxide that, after the addition polymerization - grafting reaction, is reacted with a primary or secondary amine. Upon the addition of an ionizing agent and water, an aqueous dispersion or solution can be established. The resinous reaction products are useful in the formulation of coating compositions, and particularly, coating compositions useful for cathodic electrocoating.

Cathodic electrocoating compositions containing base-functional graft

Epoxy resin is reacted with a terminating agent to eliminate at least part of the epoxide groups of the resin and form modified resin. The epoxy resin or such modified resin is also reacted with addition polymerizable monomer at elevated temperature in the presence of at least 3% of benzoyl peroxide based on the weight of such monomer. Generally the latter reaction is done at about 110.degree. C. to about 120.degree. C. These two reactions can be performed in any desired sequence, or simultaneously. The final reaction mixture produced contains:

Graft polymer compositions of terminated epoxy resin, processes for

Increasing the solids content of an aqueous dispersoid of:

Polymerization process and product

An acid-solubilized aqueous dispersion particularly suitable for use in the cathodic electrocoating art and stable up to pH of about 9 comprises the product of reacting substantially all of the epoxide groups of a polyether diepoxide with from about 1.25 to 2 moles of a polyamine having from 2 to 5 amine groups to form a precursor adduct and subsequently reacting this precursor adduct with about 0.2 to 2 moles of a mono-epoxide having a hydrolysis-resistant normal alkyl group of at least 4 carbon atoms to form a substantially epoxy-free polyamino polyhydroxy polyether resinous adduct, a sufficient proportion of the amine groups of said polyamine being primary or secondary to provide an amino hydrogen for reaction with every epoxide group of both the diepoxide and the mono-epoxide, and about 0.05 to 0.4 weight parts (per part of the resinous adduct) of an aminoplast resin having at least about one gram-equivalent of carboxylic acid groups with pK.sub.a from about 2 to 6 per 1,000 grams of aminoplast resin for catalyzing heat-induced curing of the resin mixture. The coatings cathodically electrodeposited from such dispersions exhibit superior corrosion and detergent resistance when cured at moderate temperatures.

Aqueous dispersion of polyamino polyhydroxy polyether resinous adduct

Discloses a technique for modifying an epoxy resin by reacting with addition copolymerizable monomer in the presence of at least 3% of benzoyl peroxide at about 110.degree. C. to 120.degree. C., or the free radical initiating equivalent thereof. The reaction mixture obtained contains:

Modified epoxy resins, processes for making and using same and

An ultraviolet radiation curable coating composition containing a certain adhesion promotor for adhesion to metal substrates. The ultraviolet curable coating composition comprises an ethylenically unsaturated binder vehicle, about 10% to 40% by weight of a certain high T.sub.g (glass transition temperature) adhesion promotor polymeric additive, and an ultraviolet sensitizer.

Radiation polymerization of polymeric binder coating compositions

Cathodic electrocoating process for forming resinous coating using an

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.

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

Polyether-urethane polymers, prepared from the reaction of specific molar ratios of diisocyanates with specific mixtures of polyetherdiols, glycols, triols and tetraols, and having 4-10 reactive isocyanate groups are further reacted with hydroxyalkyl acrylates through the free isocyanate functionality to provide polymers 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.

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Brunswick, OH, United States of America

Vincent W Ting