Process for the production of polyurethane di(meth)acrylates

Details Process for the production of polyurethane di(meth)acrylates Process for the production of polyurethane di(meth)acrylates

C - Chemistry, Metallurgy

08

G

C08G 18/10 (2006.01) C08G 18/32 (2006.01) C08G 18/67 (2006.01) C08G 18/73 (2006.01) C08G 18/81 (2006.01) C09D 175/16 (2006.01)

Patent

CA 2554963

A process for the production of polyurethane di(meth)acrylates in which 1,6- hexane diisocyanate is reacted, without solvent and without subsequent purification operations, with a diol component and hydroxy-C2-C4-alkyl (meth)acrylate in the molar ratio x : (x-1) : 2, wherein x means any desired value from 2 to 5 and the diol component is a combination of two to four (cyclo)aliphatic diols with molar masses of 62 to 600 and wherein each of the diols constitutes at least 10 mol% of the diols of the diol component and powder coating compositions having the polyurethane di(meth)acrylates as a binder.

L'invention concerne un processus de production de di(méth)acrylates de polyuréthanne, dans lesquels 1,6-hexane diisocyanate est amené à réagir sans solvant et sans opérations de purification subséquentes, un composé de diol et un (méth)acrylate d'hydroxy-C2-C4-alkyle se situant dans le rapport molaire x: (x-1): 2. Dans ledit rapport, x représente une quelconque valeur souhaitée allant de 2 à 5 et le composé de diol représente un mélange de deux à quatre diols (cyclo)aliphatiques avec des masses molaires allant de 62 à 600 et chacun des diols constitue au moins 10 % molaire des diols du composé de diol. Cette invention a aussi trait à des compositions de revêtement en poudre contenant les di(méth)acrylates de polyuréthanne en tant que liant.

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