Patent ID: 6465546
Filing Date: 2002-10-15
Classification: A63B,B29B,B29D,B29K,B29L

Abstract:
A method for manufacturing a core for a golf ball, the method comprising:introducing 50 to 80 weight percent of a total amount of a 1,4 cis-polybutadiene into a mixing chamber; introducing zinc diacrylate into the mixing chamber in an amount of 20 to 40 parts per hundred parts of the total amount of the 1,4 cis-polybutadiene; introducing zinc oxide into the mixing chamber in an amount of 20 to 50 parts per hundred parts of the total amount of the 1,4 cis-polybutadiene; introducing tungsten into the mixing chamber in an amount of 2 to 10 parts per hundred parts of the total amount of the 1,4 cis-polybutadiene; introducing zinc stearate into the mixing chamber in an amount of 1 to 10 parts per hundred parts of the total amount of the 1,4 cis-polybutadiene; introducing peroxide into the mixing chamber in an amount of 0.2 to 2.5 parts per hundred parts of the total amount of the 1,4 cis-polybutadiene; blending the zinc diacrylate, the 50 to 80 weight percent of the 1,4 cis-polybutadiene, the tungsten, the zinc stearate, and the peroxide within the mixing chamber for 1 to 7 minutes at a temperature of at least 100Â° F. to create a partial volume mixture, the blending performed by blades rotating at 35-40 rotations per minute; adding the remaining 20 to 50 weight percent of the total amount of the 1,4 cis-polybutadiene to the mixing chamber subsequent to the blending; mixing the remaining 20 to 50 weight percent of the total amount of the 1,4 cis-polybutadiene with the partial volume mixture within the chamber for 2 to 4 minutes at a temperature of 175Â° F. to 200Â° F. to create a total volume mixture; and discharging the total volume mixture from the mixing chamber without adhesion of the zinc acrylate to the discharge doors.