Polyurea-polyurethane acrylate dispersions

A polymerizable ethylenically unsaturated urea urethane polymer dispersed in a polymerizable ethylenically unsaturated compound which is prepared by a process comprising reacting a polyisocyanate, at least a portion of which is diisocyanate, with a polyfunctional amine containing primary and/or secondary amino groups in the presence of:

• (a) a polyol, at least a portion of which is a polymeric polyol containing ethylenic unsaturation and having a carbon to oxygen ratio of at least 4/1;
• (b) a diluent which is an ethylenically unsaturated compound free of active hydrogens;
• and
• (c) an active hydrogen containing polymerizable ethylenically unsaturated compound;
• under conditions sufficient to form a polymerizable ethylenically unsaturated urea urethane polymer dispersed in a polymerizable ethylenically unsaturated compound.

A curable composition comprising:

• I. a polymerizable ethylenically unsaturated urea urethane polymer dispersed in a polymerizable ethylenically unsaturated compound which is prepared by a process which comprises
• (a) reacting a polyisocyanate, at least a portion of which is a diisocyanate, with a polyfunctional amine containing primary and/or secondary amino groups in the presence of a polyol, at least a portion of which is a polymeric polyol containing ethylenic unsaturation and having a carbon to oxygen ratio of at least 4/1, and a diluent which is an ethylenically unsaturated compound free of active hydrogens under conditions sufficient to form an NCO group containing polyurea polyurethane dispersed in an ethylenically unsaturated compound;
• (b) reacting the NCO group containing polyurea polyurethane dispersion with an active hydrogen containing polymerizable ethylenically unsaturated compound under conditions sufficient to react the NCO functionality with the active hydrogens thereby forming the polymerizable ethylenically unsaturated urea urethane polymer dispersion;
• II. a curing component adapted to cure the urea urethane polymer dispersion;
• said curable composition being characterized by an average RVT Brookfield viscosity of at least about 10,000 centipoise using a number 3 spindle at 20 RPM at a temperature of 23.degree. C.

A curable composition comprising:

• I. a polymerizable ethylenically unsaturated urea urethane polymer dispersed in a polymerizable ethylenically unsaturated compound which is prepared by a process comprising reacting a polyisocyanate, at least a portion of which is a diisocyanate, with a polyfunctional amine containing primary and/or secondary amino groups in the presence of:
• (a) a polyol, at least a portion of which is a polymeric polyol containing ethylenic unsaturation and having a carbon to oxygen ratio of at least 4/1;
• (b) a diluent which is an ethylenically unsaturated compound free of active hydrogens;
• and
• (c) an active hydrogen containing polymerizable ethylenically unsaturated compound;
• under conditions sufficient to form a polymerizable ethylenically unsaturated urea urethane polymer dispersed in a polymerizable ethylenically unsaturated compound;
• II. a curing component adapted to cure the urea urethane polymer;
• said curable composition being characterized by an average RVT Brookfield viscosity of at least about 10,000 centipoise using a number 3 spindle at 20 RPM at a temperature of 23.degree. C.