Ucb S.a.

Jean-Marie Loutz

Daniel Maetens

Luc Moens

Patrick Loosen

Michel Baudour

Marc Van Kerckhove

Jean-Marie Hoebeke

Stephan Peeters

Michel Tielemans

Dirk Bontinck

Ivan Vanden Eynde

August Van Gysel

Jean-Luc Dallons

Luc De Koninck

Andr E Vandersmissen

Kris Verschueren

Yves Merck

Willy Segers

Powder coating of semicrystalline and amorphous polyesters with crosslinker

Monomers, oligomers and polymers comprising terminal oxirane groups, their process of preparation and their cationic polymerization under irradiation

Radiation-curable powder compositions, usable as paint or varnish, which comprise a mixture of at least one semi-crystalline polyester containing end methacryloyl groups and of at least one acrylic copolymer containing ethylenically unsaturated groups, these polyesters comprising the reaction products of a glycidyl methacrylate and of a semi-crystalline polyester containing end carboxyl groups.

Powder compositions with semi-crystalline polyester and acrylic copolymer base containing ethylenically unsaturated groups

Radiation-curable powder compositions, usable as paint or varnish, which comprise a mixture of at least one semi-crystalline polyester containing end methacryloyl groups and of at least one amorphous polyester containing end methacryloyl groups, comprising the reaction products of a glycidyl methacrylate and of a semi-crystalline or amorphous polyester containing end carboxyl groups.

Powder compositions with semicrystalline polyester and amorphous polyester base containing terminal methacryloyl groups

Pressure sensitive adhesives comprised of an aqueous dispersion of a copolymer of acrylic esters obtained in the presence of a crosslinking monomer carrying a functional group are set forth, said copolymer having a glass transition temperature which does not exceed 0&deg; C. The crosslinking monomer is methacrylic anhydride. The resulting adhesive displays improved adhesion and cohesion properties.

Pressure-sensitive adhesives and self-adhesive films using said adhesives

A radiation-curable powder composition for use as varnish or paint which comprises at least one crystalline polyester containing end methacrylyl groups comprising the reaction products of glycidyl methacrylate and of a crystalline polyester containing end carboxyl groups is described. The said crystalline polyester containing end carboxyl groups is either

Powder composition of crystalline polyesters containing end methacrylyl

Radiation curable compositions, comprising, per 100 parts by weight,

Radiation curable compositions

Carboxyl-terminated polyesters comprising the reaction products of (a) an aliphatic hydroxyl-terminated polyester prepared from 1,4-cyclohexanedicarboxylic acid and an alcohol component comprising

Carboxyl-terminated polyesters for the preparation of powder coating

Aqueous selfcrosslinkable resin composition comprising an aqueous dispersion of at least one polyurethane polymer having anionic salt groups as sole chain-pendant functional group and at least one vinyl polymer having chain-pendant acetoacetoxyalkyl ester groups. A selfcrosslinking reaction between the polyurethane polymer and the vinyl polymer will take place during and/or after film formation, resulting in the formation of a polymeric film having properties not found to be those of the non-functional polymer components.

Aqueous polyurethane compositions

A process for the preparation of a matte coating on an article is described, which comprises applying to said article a powdered thermosetting composition comprising as binder a mixture of a linear carboxyl group-containing polyester and a glycidyl group-containing acrylic copolymer and curing the thus coated article at a temperature of from 160.degree. C. to 210.degree. C. for a period of up to about 30 minutes. The polyester has an acid number of 20 to 50 mg KOH/g, and is the esterification product of a hydroxyl group-containing polyester with an organic dicarboxylic acid. The acrylic copolymer is obtained from 5% to 30% by weight of glycidyl acrylate or glycidyl methacrylate and 70% to 95% by weight of methyl methacrylate, whereby up to 25% of the total weight of methyl methacrylate can be replaced by another vinyl monomer, said acrylic copolymer having a number-average molecular weight (Mn) of from about 4,000 to about 10,000.

Process for the preparation of matte coatings using powdered

Carboxyl-terminated polyesters comprising the reaction products of

A powdered thermosetting composition comprising as binder a mixture of a linear carboxyl group-containing polyester and a glycidyl group-containing acrylic copolymer is described. The polyester has an acid number of 20 to 50 mg KOH/g and the acrylic copolymer is obtained from 5% to 30% by weight of glycidyl acrylate or glycidyl methacrylate and 70% to 95% by weight of methyl methacrylate, whereby up to 25% by weight of the methyl methacrylate can be replaced by another vinyl monomer, said acrylic copolymer having a number-average molecular weight (Mn) of from about 4,000 to about 10,000. This composition is particularly useful for the preparation of powdered paints and varnishes which can be applied with an electrostatic spray gun and cured at a temperature of from about 160.degree. to 210.degree. C. to produce matte finishes of excellent quality.

Matte powder coating of carboxyl polyester and glycidyl acrylic copolymer

A thermosetting powder composition which comprises (a) a specific a carboxyl-terminated polyester and (b) a glycidyl group-containing acrylic copolymer. The carboxyl-terminated polyester (a) has an acid number of 15 to 70 mg of KOH/g and must be prepared in two steps. In the first step, a hydroxyl-terminated polyester is prepared from at least one polycarboxylic acid other than 1,4-cyclohexanedicarboxylic acid, and at least one aliphatic or cycloaliphatic polyol and in the second step, the resulting hydroxyl-terminated polyester is esterified with 1,4-cyclohexanedicarboxylic acid exclusively. In addition, the composition of the polyester (a) is very specific: it contains at least 75 mole % of terephthalic acid, at least 10 mole % of 1,4-cyclohexanedicarboxylic acid and at most 14 mole % of at least one other aromatic and/or aliphatic and/or cycloatiphatic polycarboxylic acid, based on a total carboxylic acid content of 100 mole %. The thermosetting powder compositions obtained from polyester (a) and acrylic copolymer (b) are particularly useful to prepare powder paints and varnishes; they produce coatings with a high gloss, excellent mechanical properties, and at the same time, good weatherability.

Thermosetting powder compositions based on polyesters and acrylic

Carboxyl group-terminated polyesteramides comprising the reaction products of at least one diamine and a carboxyl group-terminated polyester selected from

Carboxyl group-terminated polyesteramides

The present invention provides a process for the preparation of carboxyl group-terminated polyesters, which comprises reacting in one step at elevated temperatures, terephthalic acid and at least one dihydric aliphatic compound and optionally an aromatic polycarboxylic acid having three or more carboxyl groups and/or a polyhydric organic compound having three or more hydroxyl groups and/or a linear aliphatic or cycloaliphatic dicarboxylic acid, the proportions by weight of the respective reactants being such as to produce a polyester having an acid number of from 10 to 25 mg KOH/g and a hydroxyl number of at most 5 mg KOH/g. The present invention also provides a process for preparing a powdered thermosetting coating composition suitable for application as paint or varnish on electricity-conducting articles by electrostatic powder spray methods and fluidized bed coating processes, wherein the carboxyl group-terminated polyester prepared as described above is homogeneously mixed with and epoxy compound containing at least two epoxy groups. The present invention further provides the compositions thus prepared.

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Brussels, Belgium

Jean-Marie Loutz