Solid particle-form polymerizable polymeric material and compositions, structures and methods of employing and producing the same

A method of preparing solid particle-form, polymeric material comprising reacting a partially blocked polyisocyanate with a chain extending reactant, introducing the resulting reaction admixture as a stream into a liquid bath of a non-solvent for said reaction admixture while vigorously agitating the bath so that as said reaction admixture stream is introduced thereinto said reaction admixture is dispersed as finely divided droplets within said bath, completing the reaction of said reaction admixture within said bath and recovering the resulting finely divided solid particle-form, polymeric material reaction product.

A method of preparing solid particle-form, polymeric material comprising reacting a partially blocked isocyanate with a chain extending reactant in the presence of a volatilizable liquid, permitting the reaction between said partially blocked isocyanate and said chain extending reactant to take place with increase in temperature of the reaction admixture, the reaction taking place under conditions such that the heat of reaction is sufficient to volatilize said solvent with resulting foaming or frothing of the reaction admixture but insufficient to increase the temperature of the reaction admixture above the temperature at which the blocked isocyanate groups of said partially blocked isocyanate are unblocked and comminuting the resulting reaction admixture upon completion of the reaction to produce said solid particle-form, polymeric material.

A method of preparing solid particle-form, polymeric material comprising forming a reaction admixture consisting essentially of a partially blocked polyisocyanate and a chain extending reactant, dispersing the resulting formed reaction admixture as droplets into a reaction zone, permitting the reaction between said partially blocked polyisocyanate and said chain extending reactant in said droplets to take place in droplet form within said reaction zone and recovering from the reaction zone resulting produced solid particle-form, polymeric material.

A method of preparing solid particle-form, polymeric material which comprises reacting a partially blocked polyisocyanate with a chain extending reactant, carrying out the aforesaid reaction at a temperature below the temperature at which the blocked isocyanate groups are unblocked, recovering the resulting reaction admixture and comminuting the resulting recovered reaction admixture to produce said solid particle-form, polymeric material.

Solid particle-form, thermoplastic, polymerizable or cross-linkable, multi-functional, polymeric material containing blocked isocyanate groups together with urea and/or urethane linkages and wherein the blocked isocyanate groups making up said polymeric material comprise only a portion of the total isocyanate groups employed to produce said polymeric material, said polymeric material upon increase in temperature sufficient to unblock said blocked isocyanate groups being capable of undergoing polymerization or cross-linking, said polymeric material providing amino groups for reaction with blocked isocyanate groups after said isocyanate groups are unblocked by heating said polymeric material to an elevated temperature sufficient to unblock said isocyanate groups.

Solid particle-form, thermoplastic, polymerizable or cross-linkable, multi-functional, polymeric material containing blocked isocyanate groups together with urea and/or urethane linkages and wherein the blocked isocyanate groups making up said polymeric material comprise only a portion of the total isocyanate groups employed to produce said polymeric material, said polymeric material upon increase in temperature sufficient to unblock said blocked isocyanate groups being capable of undergoing polymerization of cross-linking and wherein said blocked isocyanate groups are blocked by more than one blocking group and which unblock at different temperatures.

Solid particle-form thermoplastic, polymerizable or cross-linkable, multi-functional, polymeric material containing blocked isocyanate groups together with urea and/or urethane linkages and wherein the blocked isocyanate groups making up said polymeric material comprise only a portion of the total isocyanate groups employed to produce said polymeric material, said polymeric material upon increase in temperature sufficient to unblock said isocyanate groups being capable of undergoing polymerization or cross-linking and wherein said blocked isocyanate groups are blocked by a secondary amine.

Solid particle-form, thermoplastic, polymerizable or cross-linkable, multi-functional polymeric material containing blocked isocyanate groups together with urea and/or urethane linkages and wherein the blocked isocyanate groups making up said polymeric material comprise only a portion of the total isocyanate groups employed to produce said polymeric material, said polymeric material upon increase in temperature sufficient to unblock said isocyanate groups being capable of undergoing polymerization or cross-linking and wherein said blocked isocyanate groups are blocked by an imide.

Solid particle-form, thermoplastic, polymerizable or cross-linkable, multi-functional polymeric material containing blocked isocyanate groups together with urea and/or urethane linkages and wherein the blocked isocyanate groups making up said polymeric material comprise only a portion of the total isocyanate groups employed to produce said polymeric material, said polymeric material upon increase in temperature sufficient to unblock said isocyanate groups being capable of undergoing polymerization or cross-linking and wherein said blocked isocyanate groups are blocked by ethyl malonate.

Solid particle-form, thermoplastic, polymerizable or cross-linkable, multi-functional polymeric material containing blocked isocyanate groups together with urea and/or urethane linkages and wherein the blocked isocyanate groups making up said polymeric material comprise only a portion of the total isocyanate groups employed to produce said polymeric material, said polymeric material upon increase in temperature sufficient to unblock said isocyanate groups being capable of undergoing polymerization or cross-linking and wherein said blocked isocyanate groups are blocked by acetylacetone.

Solid particle-form, thermoplastic, polymerizable or cross-linkable, multi-functional, polymeric material containing blocked isocyanate groups together with urea and/or urethane linkages and wherein the blocked isocyanate groups making up said polymeric material comprise only a portion of the total isocyanate groups employed to produce said polymeric material, said polymeric material upon increase in temperature sufficient to unblock said blocked isocyanate groups being capable of undergoing polymerization or cross-linking wherein said polymeric material is derived from a polyisocyanate reacted with a hydroxy-terminated polyester.

Solid particle-form, thermoplastic, polymerizable or cross-linkable, multi-functional polymeric material containing blocked isocyanate groups together with urea and/or urethane linkages and wherein the blocked isocyanate groups making up said polymeric material comprise only a portion of the total isocyanate groups employed to produce said polymeric material, said polymeric material upon increase in temperature sufficient to unblock said blocked isocyanate groups being capable of undergoing polymerization or cross-linking wherein said polymeric material is derived from a polyisocyanate reacted with a hydroxy-terminated polybutadiene.

Solid particle-form, thermoplastic, polymerizable or cross-linkable, multi-functional, polymeric material containing blocked isocyanate groups together with urea and/or urethane linkages and wherein the blocked isocyanate groups making up said polymeric material comprise only a portion of the total isocyanate groups employed to produce said polymeric material, said polymeric material upon increase in temperature sufficient to unblock said blocked isocyanate groups being capable of undergoing polymerization or cross-linking wherein said polymeric material is derived from a polyisocyanate reacted with hydroxy-terminated polyether.

Solid particle-form, thermoplastic, polymerizable or cross-linkable, multi-functional polymeric material containing blocked isocyanate groups together with urea and/or urethane linkages and wherein the blocked isocyanate groups making up said polymeric material comprise only a portion of the total isocyanate groups employed to produce said polymeric material, said polymeric material upon increase in temperature sufficient to unblock said blocked isocyanate groups being capable of undergoing polymerization or cross-linking, said polymeric material being derived by reacting a polyisocyanate with a dihydroxy compound.

Solid particle-form thermoplastic, polymerizable or cross-linkable, multi-functional polymeric material containing blocked isocyanate groups together with urea and/or urethane linkages and wherein the blocked isocyanate groups making up said polymeric material comprise only a portion of the total isocyanate groups employed to produce said polymeric material, said polymeric material upon increase in temperature sufficient to unblock said blocked isocyanate groups being capable of undergoing polymerization or cross-linking and wherein said polymeric material is formed by the reaction of a polyisocyanate with a poly-functional compound reacted therewith.