Liquid carbodiimide- and uretonimine-isocyanurate-containing polyisocyanate compositions and microcellular foams made therefrom

A highly stable liquid carbodiimide- and uretonimine-isocyanurate-containing polyisocyanate composition prepared by partially reacting an organic polyisocyanate in the presence of a catalytic amount of a carbodiimization catalyst followed by reacting said carbodiimide- and uretonimine-containing organic polyisocyanate in the presence of a catalytic amount of a trimerization catalyst followed by deactivating said catalysts.

A highly stable liquid carbodiimide and uretonimine-isocyanurate-containing polyisocyanate composition prepared by partially reacting an organic polyisocyanate in the presence of a catalytic amount of a trimerization catalyst followed by reacting said isocyanurate-containing organic polyisocyanate in the presence of a catalytic amount of a carbodiimization catalyst followed by deactivating said catalysts.

A highly stable liquid carbodiimide- and uretonimine-isocyanurate-containing polyisocyanate composition prepared by partially carbodiimidizing a mixture of an organic polyisocyanate and isocyanurate-containing polyisocyanate in the presence of a catalytic amount of a carbodiimization catalyst followed by deactivating said catalyst.

A highly stable liquid carbodiimide- and uretonimine-isocyanurate-containing polyisocyanate composition prepared by heating an organic polyisocyanate in the presence of catalytic amount of a mixture of a carbodiimization catalyst and a trimerization catalyst followed by deactivating said catalysts.

A process for the preparation of a stable liquid carbodiimide- and uretonimine-isocyanurate-containing polyisocyanate composition comprising partially trimerizing a mixture of an organic polyisocyanate and carbodiimide- and uretonimine-containing polyisocyanate in the presence of a catalytic amount of a trimerization catalyst followed by deactivating said catalyst.

A process for the preparation of a stable liquid carbodiimide- and uretonimine-isocyanurate-containing polyisocyanate composition comprising partially reacting an organic polyisocyanate in the presence of a catalytic amount of a carbodiimidization catalyst followed by reacting said carbodiimide- and uretonimine-containing organic polyisocyanate in the presence of a catalytic amount of a trimerization catalyst followed by deactivating said catalysts.

A process for the preparation of a stable liquid carbodiimide- and uretonimine-isocyanurate-containing polyisocyanate composition comprising partially trimerizing an organic polyisocyanate in the presence of a catalytic amount of a trimerization catalyst followed by reacting said isocyanurate-containing organic polyisocyanate in the presence of a catalytic amount of a carbodiimidization catalyst followed by deactivating said catalysts.

A process for the preparation of a stable liquid carbodiimide- and uretonimine-isocyanurate-containing polyisocyanate composition comprising partially carbodiimidizing a mixture of polyisocyanurate- and isocyanurate-containing polyisocyanate in the presence of a catalytic amount of a carbodiimidization catalyst followed by deactivating said catalyst.

A process for the preparation of a stable liquid carbodiimide- and uretonimine-isocyanurate-containing polyisocyanate composition comprising heating an organic polyisocyanate in the presence of a catalytic amount of a mixture of a carbodiimidization catalyst and a trimerization catalyst followed by deactivating said catalysts.

In a process for the manufacture of microcellular foams by the reaction of organic polyisocyanates and polyols, catalysts, cross-linking agents, surfactants, and additives, wherein the improvement comprises a highly stable organic polyisocyanate prepared by partially trimerizing a mixture of an organic polyisocyanate and carbodiimide- and uretonimine-containing polyisocyanate in the presence of a catalytic amount of a trimerization catalyst followed by deactivating said catalyst.

In a process for the manufacture of microcellular foams by the reaction of organic polyisocyanates and polyols, catalysts, cross-linking agents, surfactants, and additives, wherein the improvement comprises a highly stable organic polyisocyanate prepared by partially reacting said organic polyisocyanate in the presence of a catalytic amount of a carbodiimidization catalyst followed by reacting said and carbodiimide- and uretonimine-containing organic polyisocyanate in the presence of a catalytic amount of a trimerization catalyst followed by deactivating said catalysts.

In a process for the manufacture of microcellular foams, by the reaction of organic polyisocyanates and polyols, catalysts, cross-linking agents, surfactants, and additives, wherein the improvement comprises a highly stable organic polyisocyanate prepared by partially trimerizing an organic polyisocyanate in the presence of a trimerization catalyst followed by reacting said isocyanurate-containing organic polyisocyanate in the presence of a catalytic amount of a carbodiimization catalyst followed by deactivating said catalysts.

In a process for the manufacture of microcellular foams, by the reaction of organic polyisocyanates and polyols, catalysts, cross-linking agents, surfactants, and additives, wherein the improvement comprises a highly stable organic polyisocyanate prepared by partially carbodiimidizing a mixture of polyisocyanate- and isocyanurate-containing polyisocyanate in the presence of a catalytic amount of a carbodiimization catalyst followed by deactivating said catalyst.

In a process for the manufacture of microcellular foams, by the reaction of organic polyisocyanates and polyols, catalysts, cross-linking agents, surfactants, and additives, wherein the improvement comprises a highly stable organic polyisocyanate prepared by heating said polyisocyanate in the presence of a catalytic amount of a mixture of a carbodiimization catalyst and a trimerization catalyst followed by deactivating said catalysts.