Radiation curable aqueous compositions

摘要

The present invention relates to a radiation curable aqueous composition comprising at least one ethylenically unsaturated polymer (1) which is the reaction product of—a water-dispersible (meth)acrylic polymer A containing pendant hydroxyl or isocyanate groups, and containing pendant groups capable to render the polymer dispersible in aqueous medium either directly or after reaction with a neutralizing agent; —at least one ethylenically unsaturated compound B which can be radically polymerized under irradiation and which attaches to the (meth)acrylic polymer A by an urethane linkage; —and, optionally, at least one neutralizing agent C. The present invention further relates to the making and use of such radiation curable aqueous compositions.

主权项

1. A radiation curable aqueous composition comprising at least one ethylenically unsaturated polymer (1) which is the reaction product of
a water-dispersible (meth)acrylic polymer A containing pendant hydroxyl or isocyanate groups, and containing pendant groups capable of rendering the polymer dispersible in aqueous medium either directly or after reaction with a neutralizing agent; at least one ethylenically unsaturated compound B which can be radically polymerized under irradiation and which attaches to the (meth)acrylic polymer A by an urethane linkage,
wherein, if the (meth)acrylic polymer A contains pendant hydroxyl groups, the ethylenically unsaturated compound B is a compound B1 that is the reaction product of at least one polyisocyanate (b1) and of at least one ethylenically unsaturated compound (b2) containing one functional group capable of reacting with isocyanate groups,
wherein compound (b2) is selected from polyethylenically unsaturated compounds (b21), used alone or in combination with one or more monoethylenically unsaturated compounds (b22), andwherein, if the (meth)acrylic polymer A contains pendant isocyanate groups, the ethylenically unsaturated compound B is a compound B2 that is an ethylenically unsaturated compound (b2) containing one functional group capable of reacting with isocyanate groups,
wherein compound (b2) is selected from polyethylenically unsaturated compounds (b21), used alone or in combination with one or more monoethylenically unsaturated compounds (b22); and optionally, at least one neutralizing agent C,wherein the ethylenically unsaturated polymer (1) has residual hydroxyl functionality.