Abstract: A paper like butene-1 polymer sheet material is made by extruding a composition comprising (a) about 20 to 97% by weight of a butene-1 polymer having a molecular weight in excess of about 20,000, an isotacticity of at least about 25% and a butene-1 content of at least about 50% by weight, and (b) about 3 to 80% by weight of at least one normally solid filler insoluble in said polymer, to form a sheet, and stretching said sheet at least about 5% beyond its yield strain. The filler may be organic or inorganic and the sheet is preferably stretched at least about 20% beyond its yield point. The sheet is characterized by a novel surface appearance when scanned in an electron microscope, by dimensional stability and by approximately equal strengths in all directions as evidenced by a maximum tensile strength ratio of about 13:1 in mutually perpendicular directions.

Abstract: A golf ball is formed by molding a center of a homogeneous mass of polybutadiene with a metal salt of an unsaturated acid such as zinc dimethacrylate and a filler such as zinc oxide, and a cover of an ionic copolymer is formed about the center by coating as by electrodeposition or by molding. Molding of the center can successfully be carried out quickly above 170.degree. C. and the balls can be driven long distances. The centers can be molded with projections which are used for proper centering when molding a cover thereabout.

Abstract: A paper like butene-1 polymer sheet material is made by extruding a composition comprising (a) about 20 to 97% by weight of a butene-1 polymer having a molecular weight in excess of about 20,000, an isotacticity of at least about 25% and a butene-1 content of at least about 50% by weight, and (b) about 3 to 80% by weight of at least one normally solid filler insoluble in said polymer, to form a sheet, and stretching said sheet at least about 5% beyond its yield strain. The filler may be organic or inorganic and the sheet is preferably stretched at least about 20% beyond its yield point. The sheet is characterized by a novel surface appearance when scanned in an electron microscope, by dimensional stability and by approximately equal strengths in all directions as evidenced by a maximum tensile strength ratio of about 13:1 in mutually perpendicular directions.

Abstract: A golf ball comprising a substantially spherical homogeneous molded mass of elastomer highly cross-linked into a three dimensional network with long, flexible cross-links formed from a metal-containing cross-linkable monomer, said comonomer simultaneously functioning at least in part as a filler, said mass exhibiting substantially isometric compression across any diameter. Advantageously the elastomer comprises polybutadiene and said metal-containing cross-linkable monomer comprises zinc dimethacrylate present in about 15 to 60 parts per 100 parts by weight of the polybutadiene. The composition may additionally contain a small amount of zinc oxide. By proper selection of the shape and make up of the slugs from which the balls are molded or by particular techniques, e.g. laboratory sheeting mills, balls can be produced which have a maximum difference in compression across different diameters of about 5 units.

Abstract: A golf ball comprising a substantially spherical homogeneous molded mass of elastomer highly cross-linked into a three dimensional network with long, flexible cross-links formed from a metal-containing cross-linkable monomer, said comonomer simultaneously functioning at least in part as a filler, said mass exhibiting substantially isometric compression across any diameter. Advantageously the elastomer comprises polybutadiene and said metal-containing cross-linkable monomer comprises zinc dimethacrylate present in about 15 to 60 parts per 100 parts by weight of the polybutadiene. The composition may additionally contain a small amount of zinc oxide. By proper selection of the shape and make up of the slugs from which the balls are molded or by particular techniques, e.g. laboratory sheeting mills, balls can be produced which have a maximum difference in compression across different diameters of about 5 units.

Abstract: In a homogeneous molded golf ball comprising a filled elastomer highly cross-linked into a three dimensional network with long, flexible cross-links formed of a polymerized cross-linking monomer, the improvement which comprises using as said cross-linking monomer a metal-containing cross-linkable monomer whereby said comonomer simultaneously functions as said filler at least in part. The preferred elastomer is cis-polybutadiene. The metal-containing cross-linkable monomer can be formed in situ or added as such and preferably comprises a salt of at least one metal selected from the group consisting of zinc, magnesium and calcium, and at least one acid selected from the group consisting of methacrylic, acrylic, cinnamic, acotinic, crotonic, vinylacetic, itaconic, styrenesulfonic and benzoylacrylic acids. Additional filler may be added to adjust the density to the desired value.