Patent ID: 6268427
Filing Date: 2001-07-31
Classification: C08K,C08L

Abstract:
A method for increasing the damping properties of tire rubber comprising the steps of:adding a saturated damping additive to a vulcanizable composition of matter, where said damping additive comprises a hyper-branched polymer that is formed by crosslinking a functionalized polymer with a multi-functional crosslinking agent, and where the extent to which the functionalized polymer is crosslinked by the multi-functional crosslinking agent is defined by the following formula ##EQU3##where E is the relative distance to the gel point and is a value of less than 1, r is the extent of the reaction, and r.sub.gel is the extent of the reaction at the gel point; andprocessing the vulcanizable composition of matter containing the damping additive into tire rubber.