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US 4,374,164 AGranted
High solids polymer resin coating composition containing amino resin cross-linking agent
AssigneeAmerican Cyanamid Company
InventorWerner J. Blank
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AssigneeAmerican Cyanamid Company
InventorWerner J. Blank
Estimating the term…
A high solids polymer resin coating composition cross-linked with alkylated melamine resins possessing improved intercoat adhesion in multiple coating applications. A mixed methylated isobutylated melamine resin as a cross-linking agent for the high solids polymer resin coating composition surprisingly substantially eliminates intercoat adhesion failure without any negative effects on overall coating properties and performance. The backbone polymer of the composition may advantageously be acrylic resin, a polyester resin or mixtures thereof while the mixed methylated isobutylated melamine resin cross-linking agent is advantageously predominantly monomeric poly(methoxy isobutoxymethyl) melamine resin with an average methoxy content of 1-5 and an average isobutoxy content of 5-1, per triazine.
A high solids polymer resin coating composition possessing improved intercoat adhesion comprising a low molecular weight resin selected from the group consisting of acrylic resin, polyester resin and mixtures thereof and a predominantly monomeric poly(methoxy isobutoxy methyl) melamine resin cross-linking agent.
A high solids polymer resin coating composition comprising a backbone polymer selected from the group consisting of acrylic resin, polyester resin and mixtures thereof and an alkylated melamine formaldehyde resin as a cross-linking agent, the improvement therein providing a coating composition possessing improved intercoat adhesion between two coats comprising selecting a mixed methylated isobutylated melamine formaldehyde resin as the cross-linking agent.
A high solids polymer resin coating composition comprising a polymer selected from the group consisting of acrylic resin, polyester resin or mixtures thereof, having an average molecular weight between 8,000 and 2,000 and a hydroxyl number between 70 to 200 and a predominantly monomeric poly(methoxy isobutoxymethyl) melamine resin with an average substitution of 2.5 methoxy and 2.5 isobutoxy groups per triazine, a degree of polymerization below 3 and a monomeric content greater than 40 weight percent, the weight ratio of high solids polymer to melamine resin ranging between 75:25 to 60:40.
Dependencies are inferred from the claim text.