Abstract:
The present invention is to provide a coating composition capable of forming a protective film excellent in adhesion properties. Such a coating composition comprises a specific polymer containing carboxyl group, a specific multifunctional epoxide-containing compound having two or more epoxy groups, an organic solvent, and an amino-containing silane coupling agent represented by the following general formula (I): H2N—R1—Si—(OR2)3 (I) wherein, R1 is an unsubstituted alkylene group, and R2's are independently an unsubstituted alkyl group.
Abstract:
A resin composition for powder coating, which comprises the following components (A), (B) and (C): (A) a carboxyl group-containing resin having a number average molecular weight of from 1,000 to 20,000, an acid value of from 5 to 200 and a glass transition temperature of from 30 to 120° C.; (B) tris(&bgr;-methylglycidyl) isocyanurate of the formula (1): (C) as a ring opening polymerization inhibitor, at least one compound selected from the group consisting of amines having in their molecules a bond of the formula (2): and onium salts.
Abstract:
A resin composition for powder coating, which comprises the following components (A), (B) and (C): (A) a carboxyl group-containing resin having a number average molecular weight of from 1,000 to 20,000, an acid value of from 5 to 200 and a glass transition temperature of from 30 to 120.degree. C.; (B) tris(.beta.-methylglycidyl) isocyanurate of formula (1); and (C) as a ring opening polymerization inhibitor, at least one compound selected from the group consisting of amines having in their molecules a bond of formula (2); and onium salts.
Abstract:
A method of preparing a water-dispersible epoxy resin coating composition comprises: (a) Reacting an epoxy polymer with a carboxyl bearing polymer in the presence of an esterification catalyst; (b) Quenching with an excess of tertiary amine before the esterification reaction is completed; and (c) adding water to form an aqueous dispersion.
Abstract:
The present invention provides a wet-on-wet coating method comprising applying a thermosetting aqueous coating composition (A), and applying a thermosetting aqueous coating composition (B) to the uncured coating surface of the aqueous coating composition (A) wherein the aqueous coating composition (A) contains a base resin with a neutralization value of 20 to 30 KOH mg/g and the aqueous coating composition (B) contains a base resin with a neutralization value higher by 10 to 20 KOH mg/g than the base resin of the aqueous coating composition (A).
Abstract:
Non-aqueous ionomeric coatings useful as protective surface coatings applied to a substrate are produced by combining a carboxyl functional polymer with zinc carbonate. Upon heat curing the applied film, the zinc cation clusters with the carboxyl polymer to produce a thermoset coating film.
Abstract:
Ionomeric paint coatings are produced from an ionomeric polymer containing carboxyl functionality which is coreacted or neutralized with an organic zinc salt. The ionomeric polymer coreacted with a zinc organic salt functions as a binder and exhibits thermosetting-like properties.
Abstract:
A resinous composition for coating use comprising a resin obtained by the reaction of base resin having as essential groups, both carboxyl groups derived from a polycarboxylic acid whose titration midpoint potential in non-aqueous potentiometric titration is more than -300 mV in a state capable of developing a resinous acid value and a functional group reactive with a crosslinking agent, and an alkyleneimine compound in an amount equivalent to resinous acid value of 0.01 to 50, the resinous acid value based on said polycarboxylic acid in the final composition being 2 to 50.This is useful for the preparation of a coating composition having improved curing property, storage stability and time color stability.
Abstract:
A paint composition which can be applied from a spray can yet which can be cleaned with water. The composition comprises a water-soluble, neutralized resin film former contained in a water-soluble solvent, but has a maximum water content of 10 weight percent. Formulations can be provided to obtain coatings ranging from flat to high gloss.
Abstract:
Aqueous coating compositions are produced by treating a polyol having at least 3 hydroxy-groups and a molecular weight of at least 500 successively with (a) a drying oil fatty acid and (b) a maleinized fatty acid and partially or completely neutralizing the product with a base. Polyols specified include: a copolymer of styrene and allyl alcohol, and epoxy-resins, e.g. an epochlorohydrin/bisphenol A adduct. Drying oil fatty acids specified include those of linseed oil, soya bean oil, dehydrated castor oil and tall oil. 2 moles per mole of polyol may be used at 350-450 DEG F. Maleinized fatty acids specified include maleinized tall oil, and linseed oil. This treatment may be at 200-260 DEG F. for a sufficient time that half the maleic acid carboxyl groups are reacted. The neutralization may be at room temperature. Bases specified are ammonia, triethylamine, diethanolamine and diethylethanolamine. The base may be added in aqueous solution or dispersion which may contain an organic solvent, e.g. ethylene glycol monobutyl ether. The product may be diluted to a coating composition with water or organic solvents, e.g. hexanol, octanol, hexamethylene glycol and ethylene glycol monobutyl ether. The coating composition may also contain a drier, e.g. cobalt naphthenate in ethanol, and a filler or pigment, e.g. Fe2O3, rutile TiO2, barytes, carbon black or fibrous talc. It may be converted to a baking enamel by adding 5-100% of an aminoplast resin, e.g. a melamine-form-aldehyde resin and 0.01-2% of a catalyst therefore. In examples, the esterification is carried out in toluene or xylene solution. Potassium tripolyphosphate is used as a dispersing agent. In Example VIII the polyol is an acrylic copolymer of methyl methacrylate, butyl methacrylate, glycidyl methacrylate, thiophenol, and azodi-isobutyronitrile prepared by heating the reactants in isopropanol containing toluol.