Silicone-containing polyurethane resin composition and silicone-containing polyurethane resin cured product, and method for producing silicone-containing polyurethane urea resin cured product

A silicone-containing polyurethane resin cured product comprising:

• an isocyanate group-terminated, NCO-terminated modified silicone prepolymer obtained by allowing a first polyisocyanate to undergo reaction with a modified silicone containing at least one hydroxyl group at a terminal;
• a silicone oil;
• an isocyanate group-terminated, NCO-terminated urethane prepolymer obtained by allowing a second polyisocyanate to undergo reaction with polyol;
• and
• a curing agent formed of an active hydrogen compound,
• wherein a core-shell structure in which the silicone oil constitutes a core and a reacted cured product of the NCO-terminated modified silicone prepolymer and the curing agent constitutes a shell is dispersed in a matrix formed of a reacted cured product of the NCO-terminated urethane prepolymer and the curing agent.

A method for producing a silicone-containing polyurethane urea resin cured product, the method comprising

• adding a diamine as a curing agent to a silicone-containing polyurethane resin composition to cure the silicone-containing polyurethane resin composition,
• wherein the silicone-containing polyurethane resin composition comprises:
• an isocyanate group-terminated, NCO-terminated modified silicone prepolymer obtained by allowing a first polyisocyanate to undergo reaction with a modified silicone containing at least one hydroxyl group at a terminal;
• a silicone oil;
• and
• an isocyanate group-terminated, NCO-terminated urethane prepolymer obtained by allowing a second polyisocyanate to undergo reaction with polyol,
• wherein reactivity of the first polyisocyanate with the curing agent is higher than reactivity of the second polyisocyanate with the curing agent, and
• wherein in the silicone-containing polyurethane resin composition, the silicone oil is emulsified in the NCO-terminated urethane prepolymer with the NCO-terminated modified silicone prepolymer serving as a surfactant.