50results about How to "Excellent film hardness" patented technology

Polyester-based aqueous coating compositions comprising a mixture of a carboxyl-functional polyester resin (A), a water-insoluble epoxy resin (B), and a hydrophobic solvent (C), the mixture being neutralized with neutralizer (D) and dispersed or dissolved in water. The compositions have excellent film forming and processing characteristics, and are particularly useful in coating the interior surface of cans and as automobile coatings.

A photocurable acrylate composition, containing a compound of formula (I) as a photoinitiator and the components adapted to the photoinitiator. The photocurable composition has very good storage stability and very high light sensitivity, can be cross-linked and cured at a very low exposure dose, and has a very good curing effect; a film made from the composition has a smooth edge, no defect and scum, and good integrity throughout the whole pattern, and is a high-hardness resist film, and an optical filter made therefrom has high optical transparency and no light leakage.

The invention discloses a hydroxyl acrylic emulsion with a core-shell structure, and a preparation method and an application thereof. The emulsion is obtained through emulsion polymerization of five alkene monomers in the presence of an initiator and an emulsifier, and the five alkene monomers comprise, by weight, 40-65% of an alkene monomer containing no other functional groups, 5-30% of an alkene monomer containing a hydroxyl group, 2-5% of an alkene monomer containing an epoxy group, 1-7% of an alkene monomer containing a carboxyl group, and 1-3% of a polyfunctional alkene monomer with the functionality being not smaller than 2; the use amount of the initiator is 0.2-1.5 wt% of the total amount of the monomers; and the use amount of the emulsifier is 1-5 wt% of the total amount of the monomers. An aqueous two-component coating prepared from the hydroxyl acrylic emulsion and an aqueous cross-linking agent has the advantages of low content of VOCs, high content of solids, realization of good hardness and good flexibility combination of a film formed by the coating, and excellent various resistances, and can be used in aluminum section coating to substitute traditional solvent type coatings.

The present invention provides a coating composition capable of obtaining a coating film having excellent adhesion to a substrate and excellent finishing properties, coating film hardness, stain resistance, weather resistance, and hydrolysis resistance even in one coating application . The present invention is a coating composition comprising (A) a hydroxyl-containing acrylic resin, (B) a hydroxyl-containing polyester resin, (C) a coloring pigment and / or a gloss pigment, and (D) a polyisocyanate compound, characterized in that, The hydroxyl group-containing polyester resin (B) is a polyester resin having a hydroxyl value of 20 mgKOH / g to 250 mgKOH / g obtained by reacting a polyhydric alcohol comprising a uric acid ester structure cyclic polyol compound (b1) with a polybasic acid, Based on the total resin solid content of components (A) and (B), the solid content of the hydroxyl-containing polyester resin (B) is 5% by mass to 60% by mass.

The invention relates to a composition for protecting metal surfaces, in particular to a preparation method of an environmentally friendly anticorrosive fingerprint resistant paint for metal surfaces. The composition contains an A component and a B component, the A component takes waterborne epoxy resin as a matrix resin and nano-silica, a silane coupling agent, microcrystalline wax disperse liquid, zirconium complex, deionized water, defoamer and a levelling agent are added, thus obtaining the A component; the B component contains a waterborne epoxy modified amine curing agent and a certain quantity of epoxy curing promoter. The two components are mixed and stirred evenly at a ratio of 4:1 to 3:1 to form the environmentally friendly anticorrosive fingerprint resistant paint for metal surfaces. After coating, metal can be heated by going through a baking channel at a certain temperature, the film forming time can be controlled by adjusting the heating period and finally a transparent coating layer which has quite good anticorrosive protection function over metal and fingerprint resistant function is formed.