Monomers, oligomers and polymers with terminal oxirane...

C - Chemistry – Metallurgy – 08 – G

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C08G 59/02 (2006.01) C08G 18/08 (2006.01) C08G 18/10 (2006.01) C08G 18/42 (2006.01) C08G 59/12 (2006.01) C08G 59/22 (2006.01) C08G 59/24 (2006.01) C08G 59/32 (2006.01) C08G 63/91 (2006.01) C09D 163/00 (2006.01) G03F 7/038 (2006.01) G03F 7/075 (2006.01)

Patent

CA 2264690

In order to offer coatings with improved resistance to solvents and capable of being prepared by cationic polymerisation under radiation, a composition containing at least one monomer, oligomer or polymer of general formula (I) is selected: (I) in which: A¿1? is selected among the polyester sequences, the polyurethane sequences, monocarboxylic or polycarboxylic acid hydrocarbon networks, and the additive products of a carboxylic acid and of a cycloaliphatic diepoxide; m is a number between 1 and 6; R¿1? is a cycloaliphatic group bearing a hydroxyl group located in .alpha. of the oxygen atom to which R¿1? is bound; R¿2? is a second cycloaliphatic group bearing an oxirane group located at the chain end; and B is selected among one or several covalent bonds, one oxygen atom and carrier hydrocarbon radicals, linear, branched or cyclic.

Afin d'offrir des revêtements à résistance améliorée aux solvants et pouvant être préparés par polymérisation cationique sous irradiation, on choisit une composition comprenant au moins un monomère, oligomère ou polymère de formule générale (I), dans laquelle: A1 est choisi parmi les séquences polyesters, les séquences polyuréthannes, les squelettes hydrocarbonés d'acide mono- ou polycarboxylique, et les produits d'addition d'un acide polycarboxylique et d'un diépoxyde cycloaliphatique, m est un nombre de 1 à 6; R1 est un groupe cycloaliphatique porteur d'un groupe hydroxyle situé en .alpha. de l'atome d'oxygène auquel est lié R1, R2 est un second groupe cycloaliphatique porteur d'un groupe oxiranne situé en extrémité de chaîne, et B est choisi parmi une ou plusieurs liaisons covalentes, un atome d'oxygène et des radicaux hydrocarbonés linéaires, ramifiés ou cycliques porteurs.

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