Patent ID: 7524901

Claim:
A method for making a recyclable cross-linked isotactic polymer comprising: a. mixing monomer of ethylene with monomer of propylene with a catalyst to polymerize the monomer of propylene with the monomer of ethylene; b. heating to a temperature less than 140 degrees Centigrade while adding an accelerator selected from the group consisting of: TMTD, TMTM, MBTS, and mixtures thereof; c. adding a small amount of sulfur to the heated mixture, wherein the mass ratio of accelerator to sulfur ranges from about 1:1 to about 1:4; d. adding a small amount of peroxide to the heated mixture and further heating the mixture to a temperature greater than 140 degrees Celsius initiating cross-linking with the peroxide while using the accelerator to partially inhibit the cross-linking, wherein the accelerator ensures that the cross-linking and formation of sulfur bridges occurs simultaneously; and e. mixing the mixture for a time ranging from one minute to ten minutes and extruding the mixture.