Allnex Netherlands B.v.

Cytec Technology Corporation

Allnex IP S.a.r.l.

Allnex USA Inc.

Cytec Technologies Corp.

Allnex Holdings International B.v.

Barry A Lawless

Lawrence A Flood

Ram Baboo Gupta

Urvee Y Treasurer

Colin Brogan

Robert G Lees

Jeno G Szita

Lon-Tang Wilson Lin

John H Bright

John Colin Brogan

The invention relates to a coating composition comprising a reaction product UA of at least one multifunctional aldehyde A with at least one cyclic urea U, and a crosslinkable resin having at least one kind of functional groups selected from the group consisting of hydroxyl functional groups, acid functional groups, amide functional groups, amino functional groups, imino functional groups, mercaptan functional groups, phosphine functional groups, and carbamate functional groups, characterised in that the degree of etherification, measured as the ratio &#xab;(13 O&#x2014;R)/&#xab;(U) of the amount of substance n(&#x2014;O&#x2014;R) of alkoxy groups as substituents of the aldehyde carbon atoms of the multifunctional aldehyde chemically bound in the reaction product UA to the amount of substance &#xab;(U) of cyclic urea U chemically bound in the reaction products, is less than 0.01 mol/mol, and to a process for the preparation of the reaction product UA.

Non-etherified reaction product of a cyclic urea and a multifunctional aldehyde

This invention relates to products H made by reaction of a cyclic alkyleneurea U, at least one multifunctional aldehyde A2, and at least one of (a) an aminoplast former M that is not the same as the cyclic alkyleneurea U, and (b) a monofunctional aldehyde A1, which product H is optionally etherified by reaction of at least a part of the hydroxyl groups formed by addition reaction of N&#x2014;H groups and aldehyde groups, with an alcohol having from one to ten carbon atoms, and wherein glyoxal is present in the at least one multifunctional aldehyde A2, to processes for their preparation, and to a method of use thereof in coating compositions.

Modified amino resins

The invention relates to a coating composition comprising a reaction product UA of at least one multifunctional aldehyde A with at least one cyclic urea U, and a crosslinkable resin having at least one kind of functional groups selected from the group consisting of hydroxyl functional groups, acid functional groups, amide functional groups, amino functional groups, imino functional groups, mercaptan functional groups, phosphine functional groups, and carbamate functional groups, characterized in that the degree of etherification, measured as the ratio &#x3c;&#x3c;(&#x2014;O&#x2014;R)/&#x3c;&#x3c;(U) of the amount of substance n(-O&#x2014;R) of alkoxy groups as substituents of the aldehyde carbon atoms of the multifunctional aldehyde chemically bound in the reaction product UA to the amount of substance &#x3c;&#x3c;(U) of cyclic urea U chemically bound in the reaction products, is less than 0.01 mol/mol, and to a process for the preparation of the reaction product UA.

The invention relates to a reaction product UA of at least one cyclic urea U and at least one multifunctional aldehyde A which reaction product has as substituents on the carbonyl carbon atoms of the aldehyde A at least one kind of functional groups selected from the group consisting of hydroxyl groups &#x2014;OH and alkoxy groups &#x2014;OR characterised in that the groups &#x2014;OR comprise at least two kinds of alkoxy groups &#x2014;ORand &#x2014;OR, where Rand Rare both selected from the group consisting of linear, branched or cyclic alkyl groups having from one to twelve carbon atoms, where Rand Rmay be the same or may be different from each other, to a process of making these, and to a method of use as crosslinker in coating compositions.

Reaction product of a cyclic urea and a multifunctional aldehyde

This invention relates to a process to make a reaction product UA of at least one multifunctional aldehyde A with at least one cyclic urea U, by mixing the at least one multifunctional aldehyde A with the at least one cyclic urea U in the presence of at least one alcohol R&#x2014;OH, and optionally, at least one solvent that has no reactive groups which may react with aldehyde groups, &#x2014;CO&#x2014;NH&#x2014; groups, or hydroxyl groups, to effect an addition reaction to obtain a solution of a product UA, where Ris selected from the group consisting of linear, branched or cyclic alkyl groups having from one to twelve carbon atoms, to the reaction product obtained by this process, and to a method of use thereof as crosslinker for coating compositions.

Process for the preparation of a reaction product of a cyclic urea and a multifunctional aldehyde

The invention relates to a crosslinker composition comprising a reaction product of a cyclic urea U and a multifunctional aliphatic aldehyde A, and at least one crosslinker selected from the group consisting of reaction products of an aminotriazine and at least one aldehyde selected from the group consisting of aliphatic monoaldehydes and multifunctional aliphatic aldehydes having the structure Y(CHO), where Y is an n-functional aliphatic residue, and n is greater than 1; reaction products of urea and/or cyclic ureas and formaldehyde; alkoxycarbonyl-aminotriazines; multifunctional isocyanates which may be partially or completely blocked; reaction products of phenols and aliphatic monoaldehydes; multifunctional epoxides; multifunctional aziridines; and multifunctional carbodiimides, wherein any of the crosslinkers which have hydroxyl groups may be etherified with one or more linear, branched, or cyclic aliphatic alcohols.

Mixtures of crosslinking agents

This invention is directed to a process for the preparation of a crosslinker composition, comprising the steps of providing a mixture of an aliphatic alcohol A having at least one hydroxyl group and from 1 to 10 carbon atoms, with at least one multifunctional aldehyde C having at least two aldehyde groups &#x2014;CHO to form a mixture AC, heating the mixture AC to convert at least a part of the multifunctional aldehyde C to its hemiacetal or to its acetal to form a mixture (AC)', adding to the mixture (AC)&#x2032; least one cyclic urea U or the educts to produce the said cyclic urea U in situ, which cyclic urea U has at least one unsubstituted &#x3e;NH group, and reacting the mixture thus obtained to form a chemical bond between the nitrogen atom of the at least one unsubstituted &#x3e;NH group of the at least one cyclic urea U5 and the carbon atom of the least one aldehyde group &#x2014;CHO of the multifunctional aldehyde C, and coating compositions comprising the said crosslinker composition.

Process for the preparation of a crosslinker composition

Described is a liquid, partially alkoxymethylated melamine crosslinker composition having from about 2.6 to about 4.6 moles of combined formaldehyde per mole of melamine, from about 1.4 to about 4.4 moles of alkyl per mole of melamine, from about 1.3 to about 3.4 moles of NH per mole of melamine, a free formaldehyde level of less than about 0.5 weight percent based on 100 percent solids, and an N-methylol level of less than about 6.0 weight percent; processes for its preparation; a low formaldehyde emitting curable composition containing the crosslinker; as well as a method of coating a substrate and substrates so coated.

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Milford, CT, United States of America

Barry A Lawless