Patent ID: 9475959
Filing Date: 2016-10-25
CPC Classification: C08F,C08G,C08L,C09D

Claim Text:
1. An ethylenically unsaturated hydroxyl-terminated polyurethane (I) obtained by reacting (i) at least one ethylenically unsaturated compound (A) containing at least two reactive groups capable of reacting with isocyanate groups and at least one ethylenically unsaturated group, wherein the at least one ethylenically unsaturated compound (A) is selected from the group consisting of polyester (meth)acrylates comprising hydroxyl groups, polyepoxy (meth)acrylates comprising hydroxyl groups, and mixtures thereof, or wherein at least one ethylenically unsaturated compound (A) is selected from compounds that are obtained from partial esterification of aliphatic and/or aromatic polyhydric polyols with (meth)acrylic acid and have a residual average hydroxyl functionality of at least 2.0 in the molecule; with (ii) at least one saturated alcohol component (B) comprising: (iii) optionally, at least one ethylenically unsaturated compound (C) containing essentially one reactive group capable of reacting with isocyanate groups; and (iv) at least one polyisocyanate (D) selected from m-tetramethylxylenediisocyanate, p-tetramethylxylenediisocyanate, mixtures thereof, or derivatives thereof, wherein compound (A) is used in an amount of from 25 to 65% by weight, relative to the total weight of polyurethane (I), and wherein the groups capable of reacting with isocyanate groups are hydroxyl groups, and wherein the polyurethane (I) has a hydroxyl value of between 5 and 60 mg KOH/g.