Abstract: A method of treating natural rubber latex to reduce the antigenic protein content includes enzyme treatment of the natural rubber latex and utilizing a chemical stabilizer of the type similar to branched dodecyl benzene sulphonic acid alone or in combination with other stabilizers such as a sulfated fatty acid in combination with hydroxypropyl methylcellulose is disclosed. Also disclosed is a treatment of natural rubber latex with antioxidants either alone or together which ether serve to allow natural rubber latex products to be chlorinated without suffering debilitating aging effects. The first antioxidant is of the type 4,4-(6-T-butyl-M-cresol) or 4,4+-Butylidenebis (3-methyl-6-tert-butylphenol) while the second antioxidant is of the type of a polymeric hindered phenol or butylated reaction product of P-cresol and dicyclopentadiene.

Abstract: Solid golf balls, characterized by high initial velocity as well as outstanding retention of properties on continued hitting, are made from a blend of a resilient elastomer (e.g., cis-polybutadiene) and zinc oxide-methacrylic acid reaction product, the composition being cured with a free-radical cross-linking agent such as peroxide.

Abstract: A two-piece molded golf ball comprised of a resilient core (polybutadiene-basic zinc methacrylate covulcanizate) and an ionomer resin cover, the cover having a dimple design of icosahedral array. This ball has superior flight performance compared to conventional two-piece molded balls.