Patent ID: 7540990
Filing Date: 2009-06-02
Classification: C08G,C08L

Abstract:
1. A method for forming an article composed of a cross-linked thermoplastic polymer, the method comprising: mixing a thermoplastic urethane based material and a monomeric diisocyanate to create a first mixture, the monomeric diisocyanate comprising between 1% to 10% of the total mass of the first mixture; mixing 4,4′methylene-bis-(3-chloro-2,6-diethylaniline) and diethyl 2,4-toluenediamine to create a second mixture, wherein the 4,4′methylene-bis-(3-chloro-2,6-diethylaniline) is 75% to 95% of the total mass of the second mixture and diethyl 2,4-toluenediamine is 25% to 5% of the total mass of the second mixture; heating the first mixture to a temperature within the range of 250° F. to 550° F. to create a heated first mixture; heating the second mixture to a temperature greater than the melting point of the second mixture and less than 225° F. to create a liquid second mixture having a volume; injecting the heated first mixture into a barrel of an injection molding machine through a first opening; injecting the liquid second mixture into the barrel of the injection molding machine in a plurality of dispensing shots of approximately equal amounts of the volume of the liquid second mixture during a predetermined time period; injecting a reaction product into at least one injection mold cavity, the reaction product formed by the reaction of the heated first mixture and the liquid second mixture; forming an article composed of the reaction product.