Polyurethane (meth)acrylate oligomers and curable compositions comprising said oligomers
AssigneeArkema France
InventorsAibin Shi, Liusheng Ouyang, Zheng Shi, Qian T. Yang, Mingxin Fan
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Abstract
A polyurethane (meth)acrylate oligomer, having a tri-block symmetric structure BAB, comprises a polyether central block A linked by two urethane bonds to respectively two terminal hydrophobic blocs B based on hydrophobic polyester oligomers having a terminal (meth)acryloyloxy alkylene group. A curable composition (1k) comprises the oligomer and may be used for soft touch coatings in electronics, consumer goods and vehicle manufacture, as the resulting cured soft touch coating.
Claims18
A curable coating composition suitable for use in soft touch coatings, wherein the composition comprises at least one polyurethane (meth)acrylate oligomer, wherein the oligomer has a tri-block symmetric structure B—A—B, comprising a polyether central block A linked by urethane bonds of two diisocyanate molecules, to respectively two terminal hydrophobic blocks B, wherein polyether central block A is based on polyoxyethylene or oligomers of polyethoxy-propoxy copolymers and hydrophobic blocks B are based on hydrophobic polyester oligomers generated from a polycaprolactone comprising 6 to 30 ester repeating units, having a terminal (meth)acryloyloxy alkylene group.
Dependencies are inferred from the claim text.