Basf Corporation

Basf Coatings Ag

Michael A Gessner

Donald H Campbell

Bruce Oermann

Walter H Ohrbom

Donald L St Aubin

Marvin L Green

Joseph P Borst

Paul J Harris

Hubert Baumgart

Timothy P Kandow

Lawrence Sacharski

Charles F Williams

The invention provides heat-curable thixotropic mixtures containing carbamate and/or allophanate groups, including at least one oligomer and/or polymer containing at least one of carbamate and allophanate groups, and at least one thixotropic agent that is a urea derivative preparable by reacting at least one amine and/or water with at least one isocyanate in the presence of at least one amino resin. The invention further provides processes for preparing the mixtures and coating materials, adhesives and sealing compounds prepared from the mixtures.

Thermally curable, thixotropic blends containing carbamate and/or allophanate groups

The invention provides carbamate-functional resins and coating compositions incorporating said resins that have improved adhesion with respect to subsequently applied films or coatings. More particularly, the invention relates to carbamate-functional addition polymers having at least 250 grams of polymer per carbamate group which are made with less than 35 percent by weight of nonfunctional monomers, preferably with less than 20 percent by weight and most preferably from 0 to less than 10 percent by weight, based on the total weight of the polymer. The invention further provides a method of making a carbamate-functional polymer and carbamate-functional polymers made by the claimed method. Finally, the invention provides a method for improving the adhesion of a first coating composition to a subsequently applied material as well as a method of making a composite comprising a coated substrate, an adhesive composition, and a glass having at least one surface.

Carbamate-functional resins having improved adhesion, method of making the same, and method of improving intercoat adhesion

The invention provides a thermosetting aqueous primer composition that includes a polyurethane polymer, an acrylic polymer, and a crosslinking component that is reactive with at least one of the polyurethane polymer and the acrylic polymer. The polyurethane polymer has a glass transition temperature of 0&deg; C. or less. The acrylic polymer has a glass transition temperature that is at least about 20&deg; C. higher than the glass transition temperature of polyurethane resin. The invention further provides a composite coating having as a primer layer a cured layer of the primer composition of the invention and having at least one topcoat layer.

Waterborne primer with improved chip resistance

A powder slurry coating composition is prepared by adding individual particulate materials including at least one resin powder to an aqueous medium and then milling the dispersed particulate materials to produce a median particle size of up to about 15 microns. The powder slurry coating composition is used to prepare a coating on a substrate. The coating is equivalent to coatings obtained from powder slurry coating compositions in which the powder is produced by melt mixing in an extruder and grinding the extrudate.

Powder slurry coating composition

The invention provides a method for improving the adhesion of a repair coating to a coated substrate. It requires that at least one coating composition be applied to a substrate, the coating composition having (a) a film forming component with (i) a crosslinking component comprising one or more aminoplast resins, and (ii) one or more polymers having one or more functional groups which are reactive with the crosslinking component, (b) an adhesion improving additive comprising one or more compounds containing Sn(IV), (c) a catalyst for promoting a reaction between crosslinking agent (i) and one or more polymers (ii). The at least one coating composition is cured to provide a coated substrate and one or more repair coatings are applied to the coated substrate. In a preferred aspect of the invention, the one or more repair coatings applied are the same as the at least one coating composition. In a preferred aspect of the invention the at least one coating composition of the invention further comprises (d) an adhesion promoting component consisting of (i) an epoxy group containing component, and (ii) a monofunctional carboxy group component.

Method for improving the adhesion of a repair coating to a previously coated substrate

A process for producing a powder coating composition having powder particles wherein at least 50% of the particles are of a size between 3 and 5 microns and 100% of the particles are of a size .ltoreq.10 microns. The process includes the steps of preparing a powder coating extrudate, reducing the extrudate to flake, jet milling the powder coating to a powder wherein at least 50% of the particles are a particle size of between 3 and 5 microns and 100% of the particles are of a size less than or equal to 10 microns, and adding the powder to a mixture of water and surfactant. Dispersant and rheology control agents are then added to the mixture.

Growing community of inventors

West Bloomfield, MI, United States of America

Michael A Gessner