Abstract: Thermosetting powder compositions comprising as binder a mixture of polyesters containing carboxyl groups and of a crosslinking agent having functional groups capable of reacting with the carboxyl groups.

Abstract: In order to offer coatings with improved resistance to solvents which can be prepared by cationic polymerization under irradiation, the choice is made of a composition comprising at least one monomer, oligomer or polymer of general formula (I): in which: A1 is chosen from polyester blocks, polyurethane blocks, hydrocarbon-comprising backbones of mono- or polycarboxylic acid and addition products of a polycarboxylic acid and of a cycloaliphatic diepoxide, m is a number from 1 to 6, R1 is a cycloaliphatic group carrying a hydroxyl group situated in the a position with respect to the oxygen atom to which R1 is bonded, R2 is a second cycloaliphatic group carrying an oxirane group situated at the chain end, and B is chosen from one or more covalent bonds, an oxygen atom and linear, branched or cyclic hydrocarbon-comprising radicals.

Abstract: 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.

Abstract: 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.

Abstract: 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° C. The crosslinking monomer is methacrylic anhydride. The resulting adhesive displays improved adhesion and cohesion properties.

Abstract: 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(a) a polyester which is the reaction product of(1) an acid constituent which contains (a.1.1) 85 to 100 mol % of terephthalic acid or of 1,4-cyclohexanedicarboxylic acid and (a.1.2) 0 to 15 mol % of at least one other aliphatic, cycloaliphatic or aromatic di- or polycarboxylic acid having from 4 to 14 carbon atoms, and(2) an alcohol constituent which contains (a.2.1) 85 to 100 mol % of a saturated, straight-chain, aliphatic diol having from 2 to 12 carbon atoms and (a.2.

Abstract: Radiation curable compositions, comprising, per 100 parts by weight,(a) at least 20 parts by weight of at least one radiation polymerizable compound containing at least two groups selected from CH.sub.2 .dbd.CH--COO-- and CH.sub.2 .dbd.C(CH.sub.3)--COO-- and(b) at least 5 parts by weight of at least one (2-oxo-1-pyrrolidinyl)alkyl acrylate or methacrylate of the formula: ##STR1## wherein R represents an alkylene radical containing 2 to 4 carbon atoms and R.sub.1 represents a hydrogen atom or a methyl radical.These radiation curable compositions exhibit a high speed of curing by ultraviolet irradiation or by an accelerated electron beam, and are suitable for the production of coatings with excellent qualities such as good adhesion to the most diverse substrates, a high surface hardness, an improved abrasion resistance and chemical resistance, and good mechanical properties.

Abstract: 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(1) from 10 to 100 equivalent % of a cycloaliphatic diol and(2) from 90 to 0 equivalent % of a straight or branched chain aliphatic polyol having 2 to 12 carbon atoms, with(b) an aliphatic and/or aromatic dicarboxylic acid or the corresponding anhydride,process for preparing the same and the thermosetting powder compositions based on these polyesters and polyepoxy compounds used for the production of powder varnishes and paints. These polyesters provide coatings having an excellent weatherability combined with outstanding mechanical properties, even if curing takes place at low temperature.

Abstract: 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.

Abstract: 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.

Abstract: 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(1) from 10 to 100 equivalent % of a cycloaliphatic diol and(2) from 90 to 0 equivalent % of a straight or branched chain aliphatic polyol having 2 to 12 carbon atoms, with(b) an aliphatic and/or aromatic dicarboxylic acid or the corresponding anhydride,process for preparing the same and the thermosetting powder compositions based on these polyesters and polyepoxy compounds used for the production of powder varnishes and paints. These polyesters provide coatings having an excellent weatherability combined with outstanding mechanical properties, even if curing takes place at low temperature.

Abstract: 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.

Abstract: 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 %.

Abstract: Carboxyl group-terminated polyesteramides comprising the reaction products of at least one diamine and a carboxyl group-terminated polyester selected from(a) a polyester prepared from at least one aliphatic and/or cycloaliphatic dicarboxylic acid and at least one polyol:(b) a polyester which is the reaction product of(i) at least one aliphatic and/or cycloaliphatic dicarboxylic acid and/or isophthalic acid, with(ii) a hydroxyl group-terminated polyester, and(c) a polyester which is the reaction product of(i) at least one aliphatic and/or cycloaliphatic dicarboxylic acid, with(ii) a polyester containing both terminal hydroxyl and terminal carboxyl groups, prepared by esterification of(iii) isophthalic acid with(iv) a hydroxyl group-terminated polyester,processes for preparing the same, and the powdered thermosetting compositions based on these polyesteramides and polyepoxy compounds for the production of powdered varnishes and paints which can be applied with a triboelectric spray gun.

Abstract: Carboxyl group-terminated polyesteramides comprising the reaction products of at least one diamine and a carboxyl group-terminated polyester selected from(a) a polyester prepared from at least one aliphatic and/or cycloaliphatic dicarboxylic acid and at least one polyol;(b) a polyester which is the reaction product of(i) at least one aliphatic and/or cycloaliphatic dicarboxylic acid and/or isophthalic acid, with(ii) a hydroxyl group-terminated polyester, and(c) a polyester which is the reaction product of(i) at least one aliphatic and/or cycloaliphatic dicarboxylic acid, with(ii) a polyester containing both terminal hydroxyl and terminal carboxyl groups, prepared by esterification of(iii) isophthalic acid with(iv) a hydroxyl group-terminated polyester,processes for preparing the same, and the powdered thermosetting compositions based on these polyesteramides and polyepoxy compounds for the production of powdered varnishes and paints which can be applied with a triboelectric spray gun.

Abstract: 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.