Vianova Resins Ag

Cytec Surface Specialties Austria Gmbh

Cytec Austria, Gmbh

Thomas Fraydl

Rami-Raimund Awad

Martin Gerlitz

Ulrike Kuttler

Johann Billiani

Ingo Kriessmann

Karl Rossmann

Martin Leitner

Andreas Kocsar

A water-reducible mixture of (meth)acrylic copolymers having a hydroxyl number of from 40 mg/g to 250 mg/g, an acid number of from 15 mg/g to 80 mg/g, a weight average molar mass Mfrom 9 kg/mol to 40 kg/mol and a glass transition temperature Tfrom &#x2212;40&#xb0; C. to 80&#xb0; C., based on polymerised monomers comprising at least one alkyl ester A of an olefinically un-saturated carboxylic acid having from 1 to 8 carbon atoms in the alkyl group, at least one hydroxy functional alkyl ester B of an olefinically unsaturated carboxylic acid, at least one aliphatic compound C that has both hydroxy and carboxyl functionalities, or which is a lactone or a cyclic lactone, at least one vinyl monomer D which does not comprise a moiety derived from an olefinically unsaturated carboxylic acid, at least one olefinically unsaturated carboxylic acid E, a process for its preparation, and a method of use thereof in the preparation of paints.

Aqueous binders for coatings with improved gloss

Radiation-curable water-dilutable urethane resins obtainable by reacting cycloaliphatic and/or aromatic diisocyanates with a mixture of a (meth)acryloyl-containing dihydroxy compound in an amount such that the amount of reactive hydroxyl groups present therein is from 0.2 to 0.6 mol, and with a tri or tetrahydric polyol which has been partly esterified with (meth)acrylic acid and has a residual average hydroxyl functionality of from 1.0 to 1.4 in the molecule, in an amount such that the amount of the reactive hydroxyl groups is from 0.4 to 0.8 mol, the sum of the amounts of the reactive hydroxyl groups always being 1.0 mol, and from 40 to 60% of the isocyanate groups being converted into urethane groups, and reacting the resulting intermediate with an aliphatic saturated monocarboxylic acid having at least two hydroxyl groups in an amount such that the amount of the reactive hydroxyl groups is from 0.6 to 1 mol, until the hydroxyl groups have undergone complete reaction and reacting this product, if desired, with further part-esterified polyol in an amount such that the amount of hydroxyl groups in the polyol is from 0 to 0.5 mol until the remaining free isocyanate groups have undergone complete reaction, the molar proportions of the components being chosen so that the ratio of the number of isocyanate groups to the number of hydroxyl groups is from 0.9:1 to 1:1 and the reaction product possesses carboxyl groups in accordance with an acid number of from 20 to 40 mg/g and has a specific double bond content of not more than 3.5 mol/kg.

Radiation-curable water-dilutable urethane resins, preparation process

Process for the preparation of water-dilutable urethane resins and use of the so produced urethane resins, for example, as binders for coating materials which can be crosslinked by free-radical polymerization.

Water-dilutable urethane resins, process for the preparation, and the

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Graz, Austria

Thomas Fraydl