Patent ID: 9000070
Filing Date: 2015-04-07
Classification: B29B,B60C,C08J

Abstract:
1. A method for preparing a rubber composition, the method comprising: (a) providing a mixer having a mixing chamber and at least one rotor, (b) adding to the mixing chamber, ingredients comprising: (c) using the mixer to mix the ingredients in at least one of a master batch stage, re-mill stage and final mixing stage to produce a rubber composition having an improved dispersion index after master batch mixing that is at least 30% higher than the dispersion index of the same rubber composition mixed using a 4S or 4H mixer, wherein, the method produces an improved mixing efficiency such that the rubber composition reaches a temperature of at least 165° C. during the master batch stage at least 15% faster than the same rubber composition mixed using a 4S or 4H mixer.