Charles W Bull

55524575, Sep 3, 1996

Sep 11, 1995

8/526351

Charles L. Bull - North Lawrence OH
Howard A. Colvin - Tallmadge OH

The Goodyear Tire & Rubber Company - Akron OH

C08J 322
C08L 900

523351

By utilizing the process of the present invention a carbon black/resin masterbatch powder can be easily prepared on a commercial scale. This invention more specifically discloses a process for making a resin/carbon black masterbatch powder which comprises the steps of: (1) mixing the carbon black and the resin in an aqueous medium at an elevated temperature to produce an aqueous dispersion, with the proviso that the elevated temperature is above the melting point of the resin in the case of crystalline resins and with the proviso that the elevated temperature is above the softening point of the resin in the case of amorphous resins; (2) cooling the aqueous dispersion to a temperature which is below the melting point or the softening point of the resin; and (3) recovering the masterbatch powder from the aqueous dispersion. By utilizing the technique of this invention resin-composite particulates of syndiotactic-1,2-polybutadiene and carbon black can be easily prepared. Such resin-composite particulates are reported to be useful in making tire tread formulations which provide improved tire performance characteristics on ice and snow.

47390360, Apr 19, 1988

Aug 15, 1986

6/896688

Howard A. Colvin - Tallmadge OH
Charles L. Bull - Akron OH

Goodyear Tire & Rubber Company - Akron OH

C08G 7500

528389

Superior vulcanization agents for rubber are prepared by reacting sulfur with an olefin at 140. degree. -160. degree. C. in an aqueous reaction media in the presence of a basic catalyst and a dispersing agent.

49027751, Feb 20, 1990

Aug 5, 1988

7/228425

Howard A. Colvin - Tallmadge OH
Charles L. Bull - Akron OH
Fredrick L. Magnus - Mogadore OH

The Goodyear Tire & Rubber Company - Akron OH

C08G 7514

528389

Superior vulcanization agents for rubber are prepared by reacting sulfur with at least one olefin at 120. degree. -200. degree. C. in an aqueous reaction media with agitation. In one embodiment, the vulcanization agent comprises a sulfur/olefin adduct having from about 39% to about 46% by weight of free elemental sulfur level.

47925892, Dec 20, 1988

Feb 4, 1987

7/010876

Howard A. Colvin - Tallmadge OH
Charles L. Bull - Akron OH

The Goodyear Tire & Rubber Company - Adron OH

C08C 1920

525343

Superior vulcanization agents for rubber are prepared by reacting sulfur with an olefin at 140. degree. -160. degree. C. in an aqueous reaction media in the presence of a basic catalyst and a dispersing agent.