| abstract |
The present invention provides a method comprising: providing a modified rubber selected from modified polybutadiene rubber (BR), modified styrene butadiene rubber (SBR), or a combination thereof Component, wherein the modified rubber component has been modified by a functional group having a heteroatom selected from oxygen, nitrogen, silicon or a combination thereof, and wherein the rubber component has Tg between 110°C; and select high-efficiency plasticizing resin. The high-efficiency plasticizing resin is such that when contained in the mixture of the modified rubber component and 67 phr of the high-efficiency plasticizing resin, the Tg of the mixture is at least higher than that of the modified rubber component itself. A resin with a Tg higher than 14°C is described. The method may further comprise mixing between 70 phr and 100 phr of said modified rubber component with between 30 phr and 130 phr of said high efficiency plasticizing resin. |