The results showed that NR/JSR T5800 could fulfill the requirement of the tire compounds and at the same time the heat build-up of the compounds was the least,the wet traction of the NR/JSR T5800 compounds was the best,while the rolling resistance was the least.

The various ingredients in tread compound were optimized with the orthogonal experi mental method to lower the rolling resistance of tire tread without sacrificing its wet traction.

The experimental results showed that the tread compounds with appropriate SSBR2 could meet the requirement of the mechanical properties and had lower heat built-up and better wet traction by adding SSBR2.

The properties of phosphate binder of no bake sand such as sand mixing technique,the amount of binder and hardener,the scrip time and work time,the shakeout property and humidity resistance are studied in the paper.

The humidity resistance of the no-bake Al-phosphate sand was improved with the addition of the modifier to the no-bake Al-phosphate binder and changing the solidification humidity.

It is revealed that the room temperature compressive strength of no-bake sand is reduced by adding the magnesium-containing modifier;the humidity resistance is improved effectively when the amount of the magnesium-containing modifier is appropriate.

But the binder has the poor power to anti-moisture absorption.

It was found that the new catalyst exhibits eminent performance for CO oxidation at room temperature in ambient humidity,having better humidity resistance.

Furthermore, it shows improved application properties such as low tack during application and of the dry film as well as high curl retention and humidity resistance.

The results showed that with increasing the vinyl content, the Tg, optimum cure time , wet skid resistance and rolling resistance of S-SBR increased, the hardness, rebound, 300% tensile modules, heat build up and tear strength decreased.