Process for preparing a polymer alloy, molded product, and reaction injection molded products

A molded polymer alloy product obtained by

• admixing substantially stable reactant streams to obtain an admixture,
• (i) introducing said admixture into a mold, said admixture comprising:
• (a) polymer forming compounds for forming polyurethane polymer(s) and at least one polymer selected from the group consisting of polyurea polymers and polyisocyanurate polymers,
• said polyurethane polymer forming compounds including a polyisocyanate, and a polyurethane polymerization catalyst,
• said polyurea polymer forming compounds including a polyamine or hydrazine containing compound and a polyisocyanate,
• said polyisocyanurate polymer forming compounds including at least one prepolymer containing reactive isocyanate groups or a polyol and a polyisocyanate, and a trimerization catalyst;
• and
• (b) polyamide polymer forming compounds, said polyamide polymer forming compounds including at least one lactam, an anionic polymerization catalyst and a polymerization activator,
• said polymer forming compounds reacting in said mold wherein a molded product composed of the polymers is obtained from the respective polymer forming compounds;
• and
• (ii) recovering said product from said mold.

A polymer alloy comprising at least one polyamide polymer and at least one polyurethane polymer and at least one polymer selected from the group consisting of polyisocyanurate polymers and polyurea polymers, wherein

• said polyamide is a polymerization product of 4 to 15 carbon ring lactams,
• said polyurethane polymer is the reaction product of a polyhydroxy compound having an equivalent weight of 100 to 3000 with an organic polyisocyanate,
• said polyisocyanurate polymer is the trimerization reaction product of an isocyanate-terminated urethane prepolymer or the reaction product of the trimerization of a polyol with an excess amount of an organic polyisocyanate in the presence of a urethane catalyst, and a trimerization catalyst,
• said polyurea polymer is the in-mold reaction product of an organic polyisocyanate and an amine-terminated poly(oxyalkylene) compound having an equivalent weight of about 1000 to 2000.

A molded polymer alloy product obtained by:

• (i) mixing substantially stable reactant streams to obtain a mixture,
• (ii) introducing said mixture into a mold, said mixture comprising:
• (a) polymer forming compounds for forming at least one polymer selected from the group consisting of polyurea polymers and polyisocyanurate polymers, said polyurea polymer forming compounds including a polyamine or hydrazine containing compound and a polyisocyanate, said polyisocyanurate polymer forming compounds including a prepolymer containing reactive isocyanate groups or a polyol and a polyisocyanate, and a trimerization catalyst;
• and
• (b) polyamide polymer forming compounds, said polyamide polymer forming compounds including at least one lactam, an anionic polymerization catalyst and a polymerization activator,
• said polymer forming compounds reacting in said mold wherein a molded product is formed from the respective polymer forming compounds;
• and
• (iii) recovering said product from said mold.