Production of homogeneous molded golf balls

A homogeneous molded golf ball exhibiting improved compression and fracture strength while maintaining desired rebound, click, and feel required in a golf ball, obtained by curing a composition comprising:

• (A) 100 parts, by weight, of a polybutadiene elastomer containing at least 40% of cis-1,4-unsaturation;
• (B) from about 10 to 50 parts, by weight, of a coagent selected from the group consisting essentially of (i) an admixture of a polyvalent metal salt of an unsaturated acid and an active hydrogen-containing organic filler, and (ii) a reaction product obtained by the reaction of an unsaturated carboxylic acid with an active hydrogen containing organic filler, followed by further reaction with a polyvalent metal compound in the presence of said unsaturated carboxylic acid, whereby said coagent functions as a crosslinking agent with the polybutadiene elastomer said organic filler, unsaturated carboxylic acid and polyvalent metal compound are present in an amount, by weight, of about 4:1:0.5 to about 0.5:1:4, respectively;
• (C) from about 10 to 30 parts, by weight, of an inert particulate filler;
• and
• (D) from about 0.5 to 10 parts, by weight, of a polymerization initiator.