Patent ID: 6828361
Filing Date: 2004-12-07
Classification: B29B,B29C,B29K,C08K

Abstract:
A method for making a silicic acid containing rubber base composition, the method comprising the steps of:providing composition ingredients of rubber, silicic acid, silane and additional additives except for vulcanization ingredients; providing first and second mixers separate from each other wherein said ingredients except for said vulcanization ingredients can be mixed; introducing all of said composition ingredients into said first mixer except for said vulcanization ingredients simultaneously or at time intervals; mixing said composition ingredients introduced into said first mixer to a composition in said first mixer; transferring the composition formed in said first mixer directly into said second mixer without an intermediate storage thereof; and, mixing the transferred composition formed in said first mixer at least almost to completion in said second mixer with the temperature lying in the temperature range of 130Â° C. to 180Â° C. at least over the greatest part of the dwell time of the composition in said second mixer wherein said silicic acid reacts acceleratedly with said silane.