Polyurethane-polyurea particles and process for production thereof.

摘要

Polyurethane polyurea particles are obtainable by an interfacial polymerization reaction between a hydrophobic phase which is capable of forming a three-dimensional crosslinked structure by reaction and is a mixture comprising a polyisocyanate compound and a polyhydroxy compound with the isocyanate groups being stoichiometrically in excess, and a polyamine in an amount not more than one equivalent of the stoichiometric excess of isocyanate groups in the hydrophobic phase, and by polyurethanization reaction inside the particles.