Aqueous developable photosensitive polyurethane-methacrylate

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/10 (2006.01) C08G 18/32 (2006.01) C08G 18/48 (2006.01) C08G 18/67 (2006.01) C08G 18/69 (2006.01) C08G 18/83 (2006.01) G03F 7/038 (2006.01) G03F 7/16 (2006.01)

Patent

CA 2265658

Butadiene-polyether prepolymers which can be used in photopolymer resins are prepared by reacting butadiene homopolymer with stoichiometric excess of isocyanate and then reacting the product with polyether diol. Thereafter the composition is reacted with hydroxyalkyl(meth)acrylate and alkyldialkanolamine. Flexographic printing plates may be prepared using photopolymer resin comprising butadiene-polyether prepolymers.

L'invention concerne des prépolymères de butadiène-polyéther pouvant s'utiliser dans des résines photopolymères et préparés par mise en réaction d'un homopolymère de butadiène avec un excès stoechiométrique d'isocyanate et par mise en réaction ensuite du produit avec un diol de polyéther. Par la suite, la composition est mise en réaction avec un hydroxyalkyl (méth) acrylate et un alkyldialcanolamine. On peut préparer des planches d'impression flexographiques en utilisant une résine de photopolymère comprenant des prépolymères butadiène-polyéther.

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