Abstract:
A binder composition, a coating composition containing this binder, a process for its production and use to produce single or multi-layer lacquer coatings, particularly in the automotive sector, are described. The binder composition contains A) 25 to 75 wt. % of one of more resins containing carboxyl groups, which may contain .alpha.,.beta.-unsaturated groups, with a number average molecular weight (Mn) of 500 to 10000 g/mol and an acid value of 15 to 200 mg KOH/g, B) 25 to 75 wt. % of one or more polyethers, polyesters, polyether/polyesters and/or (meth)acrylic copolymers with at least one .alpha.,.beta.-unsaturated group and at least one epoxy group per molecule, wherein the .alpha.,.beta.-unsaturated groups and epoxy groups are present in a numerical ratio of 20:80 to 80:20, with a number average molecular weight (Mn) of up to 10000 g/mol, C) 0 to 60 wt. % of one or more polyols with at least two hydroxyl functional groups per molecule, D.sub.1) 0 to 20 wt. % of one or more melamine resins, D.sub.2) 0 to 40 wt. % of one or more capped polyisocyanates, wherein the sum of the weight percentages of components A), B), C), D.sub.1) and D.sub.2) is 100 wt. %, together with E) 0 to 10 wt. % of one or more catalysts to catalyze the reaction of the carboxyl and epoxy groups, related to the sum of the weights of components A) to D.sub.2), and F) 0.1 to 10 wt. % of one or more thermally or photochemically activated initiators, related to the total weight of components A) and B).
Abstract:
This invention is a new aqueous paint composition, and its object is to provide a quick-drying paint composition that has a low sensitivity to temperature and has a high rubber elasticity. An aqueous paint composition, comprising (1) a latex which is a film-forming latex polymer having anionic property, where the solubility of the monomers to form the polymer, excluding the monomers that show anionic property, is 0.01-1.50 g per 100 g of water, (2) a water-soluble or water dispersible polymer formed from a monomer mixture containing at least 20 weight % of amine functional group-containing monomer, and (3) an amount of volatile base sufficient to raise the pH of the composition to a sufficiently high level to bring essentially all amine functional groups to a nonionic state.
Abstract:
The invention relates to a method for providing a surface with carboxyl groups. A compound is applied to the surface with at least one functional group which can be converted into a carboxyl group. Thereafter, this surface is treated with a plasma to immobilize the compound, and then the functional group is converted into a carboxyl group. Also provided is a surface having carboxyl groups which is obtained with this method and a product with such a surface for exposure to blood, typically in vivo blood flows.
Abstract:
The invention relates to a coating composition for PVC sections, based on a polymeric vehicle, a crosslinking agent, and a thermoplastic resin powder. The coating composition is particularly useful for coating PVC sections for windows, shutters, and doors. PVC joinery coated with the composition of the invention has exceptional impact strength and resistance to abrasion, friction, and inclement weather.
Abstract:
A powder coating composition comprises a component (A) containing carboxylic acid or anhydride functionality and a component (B) containing hydroxy functionality. The components (A) and (B) are both solids at temperatures up to 50.degree. C. and at least one of them is a synthetic resin having a glass transition temperature in the range 0.degree. to 120.degree. C. The carboxylic acid or anhydride-functional component (A) is a compound or polymer containing at least two cyclic carboxylic anhydride groups per molecule or is a compound containing a moiety of the formula: ##STR1## where X is a hydrogen atom or an alkyl group, or a cyclic anhydride thereof. The hydroxy-functional component (B) contains at least two hydroxy groups per molecule and contains at least one amine group in its molecule to catalyze the reaction of the carboxylic acid or anhydride groups of component (A) with the hydroxy groups of component (B). The composition is prepared by mixing the ingredients, extruding them at a temperature above the glass transition temperature of at least one of the components but below the fusion temperature, and comminuting the extrudate. The composition is applied to substrates and heated to cause fusion and reaction of the ingredients to cure the coating layer formed.
Abstract:
A resinous composition comprising an acrylic resin having end carboxyl bearing long pendant groups of the formula: ##STR1## wherein R.sub.2 is a substituted or unsubstituted aliphatic hydrocarbon having 2 to 10 carbon atoms, alicyclic hydrocarbon having 6 to 7 carbon atoms or aromatic hydrocarbon having 6 carbon atoms; A is a repeating unit of ##STR2## R.sub.3 is ethylene or propylene; R.sub.4 is a substituted or unsubstituted alkylene having 2 to 7 carbon atoms; R.sub.5 is a substituted or unsubstituted alkylene having 2 to 5 carbon atoms; m is an integer of 1 to 10; and n is an integer of 2 to 50. The invention also concerns a process for preparing said resinous composition characterizing by polymerizing a monomer mixture containing end carboxyl bearing reactive acryl monomer of the formula: ##STR3##
Abstract:
An ambient temperature curable composition is prepared from a .alpha.,.beta.-ethylenically unsaturated carbonyl compound (such as trimethylol propane triacrylate) and a compound chosen from a particular class of compounds having an activated CH group (such as malonate group-containing oligomeric or polymeric esters). The coatings of the invention cure quickly without heating, and have excellent hardness.
Abstract:
An aqueous coating composition which comprises an aqueous resin having a carboxyl group (I) and a water-insoluble resin powder (II), the aqueous resin (I) being the one dispersible or soluble into an aqueous medium by ionization when the carboxyl group is neutralized with a basic substance, and the water-insoluble resin powder (II) being the one of 5 to 100 in acid value obtained by reaction between a carboxyl group-containing resin of 20 to 300 in acid value in a solid state at room temperature and a monoepoxy compound or a monoisocyanate compound.
Abstract:
The invention relates to a self-cross-linking, thermosetting, aqueous lacquer coating material, which comprises synthetic resins having a mean molecular weight (M.sub.n) of about 500 to 15,000 and containing primary and/or secondary--and if appropriate also tertiary--amino groups as well as terminal esterified carboxyl groups, having an amine number of about 20 to 180 and an ester number of about 20 to 350, and which becomes dilutable with water through protonization with acids.The invention moreover concerns the utilization of this lacquer coating material for the purposes of cathodic deposition upon electrically conducting surfaces.
Abstract:
The invention concerns a pre-condensed, thermosetting aqueous lacquer coating material containing a pre-condensation product that becomes water-dilutable after protonization with acids and has a mean molecular weight [M.sub.n ] of 800 to 15,000, obtainable by heating of 55 to 95% by weight, based on the total quantity of the binding agent, of an organic synthetic-resin binder containing primary and/or secondary amino groups which has an amine number of 30 to 150 and 5 to 45% by weight of a crosslinking agent possessing esterified terminal carboxyl groups.The invention moreover concerns the application of this lacquer coating material for cathodic deposition upon electrically conducting surfaces.