| 摘要 |
<p>PURPOSE: To advance initial speed by including a specified amount of two kinds of specific polybutadienes, metallic salts of unsaturated carboxylic acids, catalysts derived from peroxides and inorganic fillers, respectively. CONSTITUTION: A golf ball contains over 40% approx. cis-1,4 content of polybutadiene about 15-85phr. with below 50 approx. Mooney viscosity catalyzed by VIII group metal, over 40% approx. cis-1,4 content of polybutadiene about 15-85phr. with below 50 approx. Mooney viscosity catalyzed by lanthanoid, metallic salts of unsaturated carboxylic acid about 25-45phr., about 0.2-2.0phr. of catalysts derived from peroxides and inorganic fillers about 5-25phr. In the formation of a golf ball, when two kinds of polybutadienes, matallic salts of carboxylic acid and inorganic fillers are mixed together, the temperature of the mixture rises. The mixing is to be continued until a good dispersion is obtained. The temperature of the mixture is lowered lower than the bottom end of the maximum stability temperature of a free radical initiator and the free radical initiator is added, mixed, put in the mold and hardened under pressure at a high temperature.</p> |
