Abstract: A high impact polymer adapted to be recyclable comprising a polymer, a cross-linking agent, an accelerator, and a nano-clay. The cross-linking agent comprises a sulfur and a peroxide with an activity ranging from 40% to 99%. The accelerator is present in ratios ranging from 1:2 to 1:10 in relation to the sulfur and the peroxide. The nano-clay comprises a weight percent ranging from 1% to 40%. The high impact polymer is formed by preparing the nano-clay with the cross-linking agent and accelerator. Next, the polymer and the nano-clay are mixed, initiating cross-linking. The high impact polymer is formed through creation of macro radicals which create macromolecular polymer chains with sulfur bridges without requiring high torque. The accelerator ensures that the cross-linking and the formation of sulfur bridges occur simultaneously, and partially inhibits the cross-linking. The nano-clay enhances the reversibility of the cross-linking and provides enhanced strength.

Abstract: An easily recyclable cross-linked isotactic polypropylene that is additionally miscible with polyethylene is formed from a chemical reaction of combining a polymer, sulfur, peroxide, an accelerator, and at least one additive. The polymer can be mixtures of isotactic polypropylene homopolymer with an elastomer; mixtures of isotactic polypropylene homopolymer with thermoplastic-based mixes; mixtures of isotactic polypropylene copolymer with an elastomer; mixtures of isotactic polypropylene copolymer with thermoplastic-based mixes; or combinations thereof. The accelerator can be a sulfur accelerator.

Abstract: A method for preparing reversibly cross-linked isotactic polypropylene having a degree of crystallinity substantially identical to a degree of crystallinity of a starting polypropylene by mixing in the presence of heat, a polymer of isotactic polypropylene homopolymer; isotactic polypropylene copolymer; mixtures of isotactic polypropylene homopolymer and copolymer with an elastomer, an organic peroxide, and an accelerator, forming macro-radicals; the simultaneously coupling the macro-radicals with a sulfur obtaining an optimum cross-linking degree and a product made by the method.

Abstract: An article of manufacture made of an isotactic polymer, a cross-linking agent, and an accelerator. The cross-linking agent includes a peroxide and a sulfur. The peroxide has an activity ranging from about 40% to about 100%. The ratio of the accelerator to the sulfur ranges from about 1:4 to about 1:10 depending on the activity, and the ratio of the accelerator to the peroxide ranges from about 1:4 to about 1:10 depending on the activity. The article is formed by mixing the polymer, the cross-linking agent, and the accelerator at high shear rates forming a blend. The blend is heated and sent through an extruder at a temperature less than 140 degrees Celsius for less than one minute. The blend is then inserted into a molding, wherein the formed article comprises a resilience value up to about 50 KJ/m2.

Abstract: A method for making isotactic polymer using a cross-linking agent entails introducing the cross-linking agent to a polymer and an accelerator. The cross-linking agent includes a peroxide and a sulfur. The peroxide has an activity ranging from about 40% to about 100%. The ratio of the accelerator to sulfur or peroxide ranges from 1:4 to 1:10 depending on the activity of the peroxide. The method further entails shearing the polymer in a high shear rate mixer and initiating cross-linking with the peroxide, wherein the accelerator partially inhibits the cross-linking of the peroxide. The method ends by forming macro radicals during the cross-linking; and forming macromolecular chains of polymer with sulfur bridges without the need for high torque. The accelerator ensures that the cross-linking and the formation of sulfur bridges occur simultaneously.

Abstract: This invention concerns the crosslinking of isotactic polypropylene, which has always been considered a non-crosslinkable polymer. Isotactic polypropylene crosslinking not only generates new uses but also the prospects of both economic and environmentally friendly mixing and recovery operations with other polymers. The crosslinking and interpenetrating polymer network (IPN) (as is the case with polypropylene/polyethylene mixture) provides both interesting properties and significant economic and environmentally friendly interest. The principle of the crosslinking mechanism is to create macro radicals and cause them to act immediately on sulphur before the reaction of peroxide termination. The mixing process used is extrusion; however, all other processes of transformation used for thermoplastics would be useful for subsequent industrial use.

Abstract: A high impact polymer adapted to be recyclable includes a recycled isotactic polymer, a cross-linking agent, and an accelerator. The cross-linking agent comprises a sulfur and a peroxide with an activity ranging from about 40% to about 100%. The accelerator is present is ratios ranging from about 1:4 to about 1:10 in relation to the sulfur and the peroxide. The high impact polymer is formed by introducing the cross-linking agent to a polymer and an accelerator. Next, the polymer is sheared in a high shear rate mixer, where cross-linking with the peroxide starts. The accelerator partially inhibits the cross-linking of the peroxide. The high impact polymer is formed by creating macro radicals during the cross-linking and creating macromolecular chains of polymer with sulfur bridges without the need for high torque. The accelerator ensures that the cross-linking and the formation of sulfur bridges occur simultaneously.

Abstract: An article of manufacture made of an isotactic polymer, a cross-linking agent, and an accelerator. The cross-linking agent includes a peroxide and a sulfur. The peroxide has an activity ranging from about 40% to about 100%. The ratio of the accelerator to the sulfur ranges from about 1:4 to about 1:10 depending on the activity, and the ratio of the accelerator to the peroxide ranges from about 1:4 to about 1:10 depending on the activity. The article is formed by mixing the polymer, the cross-linking agent, and the accelerator at high shear rates forming a blend. The blend is heated and sent through an extruder at a temperature less than 140 degrees Celsius for less than one minute.

Abstract: A method for making isotactic polymer using a cross-linking agent entails introducing the cross-linking agent to a polymer and an accelerator. The cross-linking agent includes a peroxide and a sulfur. The peroxide has an activity ranging from about 40 % to about 100%. The ratio of the accelerator to sulfur or peroxide ranges from 1:4 to 1:10 depending on the activity of the peroxide. The method further entails shearing the polymer in a high shear rate mixer and initiating cross-linking with the peroxide, wherein the accelerator partially inhibits the cross-linking of the peroxide. The method ends by forming macro radicals during the cross-linking; and forming macromolecular chains of polymer with sulfur bridges without the need for high torque. The accelerator ensures that the cross-linking and the formation of sulfur bridges occur simultaneously.

Abstract: This invention concerns the crosslinking of isotactic polypropylene, which has always been considered a non-crosslinkable polymer. Isotactic polypropylene crosslinking not only generates new uses but also the prospects of both economic and environmentally friendly mixing and recovery operations with other polymers. The crosslinking and interpenetrating polymer network (IPN) (as is the case with polypropylene/polyethylene mixture) provides both interesting properties and significant economic and environmentally friendly interest. The principle of the crosslinking mechanism is to create macro radicals and cause them to act immediately on sulphur before the reaction of peroxide termination. The mixing process used is extrusion; however, all other processes of transformation used for thermoplastics would be useful for subsequent industrial use.