Frederick J Ravagnani

US Patent:

20040122180, Jun 24, 2004

Filed:

Dec 18, 2002

Appl. No.:

10/323458

Inventors:

William Hergenrother - Akron OH, US
Steven Schonfeld - Akron OH, US
Frederick Ravagnani - Uniontown OH, US
Roberta Ravagnani - Akron OH, US

Assignee:

Bridgestone/Firestone North American Tire, LLC

International Classification:

C08C019/00

US Classification:

525/326100, 525/374000

Abstract:

A vulcanizable rubber composition having improved metal adhesion and metal adhesion retention properties with bright steel, the improvement wherein from about to about parts by weight of a compound selected from the group consisting of aminosilanes and mercaptosilanes and mixtures thereof, per parts of the rubber component in the rubber composition is incorporated into the rubber composition prior to curing. Structural components for a pneumatic tire contain a cured rubber composition, having from about to about parts by weight of a compound selected from the group consisting of aminosilanes and mercaptosilanes and mixtures thereof per parts of the rubber component in the rubber composition, incorporated into the rubber compounds prior to curing. A method for improving metal adhesion and metal adhesion retention properties between a vulcanizable rubber composition and bright steel comprises the step of incorporating from about to about parts by weight of a compound selected from the group consisting of aminosilanes and mercaptosilanes and mixtures thereof per parts of the rubber component in the rubber composition into the rubber composition prior to curing.

US Patent:

20050119383, Jun 2, 2005

Filed:

Jan 5, 2005

Appl. No.:

11/029854

Inventors:

William Hergenrother - Akron OH, US
Steven Schonfeld - Akron OH, US
Frederick Ravagnani - Uniontown OH, US
Roberta Ravagnani - Akron OH, US

International Classification:

C08K005/04

US Classification:

524262000

Abstract:

A vulcanizable rubber composition having improved metal adhesion and metal adhesion retention properties with bright steel, the improvement wherein from about 0.1 to about 10 parts by weight of a compound selected from the group consisting of aminosilanes and mercaptosilanes and mixtures thereof, per 100 parts of the rubber component in the rubber composition is incorporated into the rubber composition prior to curing. Structural components for a pneumatic tire contain a cured rubber composition, having from about 0.1 to about 10 parts by weight of a compound selected from the group consisting of aminosilanes and mercaptosilanes and mixtures thereof per 100 parts of the rubber component in the rubber composition, incorporated into the rubber compounds prior to curing. A method for improving metal adhesion and metal adhesion retention properties between a vulcanizable rubber composition and bright steel comprises the step of incorporating from about 0.1 to about 10 parts by weight of a compound selected from the group consisting of aminosilanes and mercaptosilanes and mixtures thereof per 100 parts of the rubber component in the rubber composition into the rubber composition prior to curing.

US Patent:

20070010606, Jan 11, 2007

Filed:

Jun 14, 2006

Appl. No.:

11/453366

Inventors:

William Hergenrother - Akron OH, US
Steven Schonfeld - Akron OH, US
Frederick Ravagnani - Uniontown OH, US
Roberta Ravagnani - Akron OH, US

International Classification:

B60C 1/00

US Classification:

524262000, 524493000

Abstract:

A vulcanizable rubber composition having improved adhesion and adhesion retention properties with steel reinforcement includes up about 10 pbw of a compound selected from aminosilanes and/or mercaptosilanes per 100 parts of the rubber component in the rubber composition. The silane component can be incorporated into the rubber composition prior to curing. Composite structures and methods for providing the rubber composition also are provided.

US Patent:

54949580, Feb 27, 1996

Filed:

Jun 6, 1995

Appl. No.:

8/469140

Inventors:

Roy M. Freeman - Akron OH
William L. Hergenrother - Akron OH
Frederick J. Ravagnani - Uniontown OH

Assignee:

Bridgestone Corporation - Tokyo

International Classification:

B60C 1700
B60C 1500

US Classification:

524505

Abstract:

A sulfur-vulcanizable rubber compound, being devoid of peroxide components, having high modulus and low hysteresis properties subsequent to vulcanization. Such compounds comprise from about 25 to 55 parts by weight of polyisoprene; and from about 75 to 45 parts by weight of a diene polymer selected from the group consisting of homopolymers of conjugated diene monomers and copolymers thereof with monoolefin monomers and EPDM terpolymers to total 100 parts by weight of rubber polymer; from about 50 to 70 parts by weight of a reinforcing filler, per 100 parts by weight wherein at least a portion of at least one of the rubber polymers is grafted with a polymeric metal salt of an. alpha. ,. beta. -ethylenically unsaturated carboxylic acid to form an uncured graft rubber copolymer and at least about 4 parts by weight of a curative selected from the group consisting of sulfur and sulfur donors, per 100 parts by weight of rubber. Pneumatic tires and structural components therefor are manufactured from rubber compounds having high modulus, low hysteresis and high compressive flex fatigue and provide run flat operation.

US Patent:

40169162, Apr 12, 1977

Filed:

Apr 7, 1975

Appl. No.:

5/565895

Inventors:

Frederick Joseph Ravagnani - Uniontown OH

Assignee:

The Firestone Tire & Rubber Company - Akron OH

International Classification:

B60C 918

US Classification:

152361R

Abstract:

A pneumatic tire provided with a tread portion, at least one body ply, and at least two stabilizer plies interposed between the tread and body ply, the radially innermost of the stabilizer plies having reinforcing cords oriented at an angle of approximately 54. degree. to a meridian line of the tire to substantially eliminate ply steer force in the tire. The average angle of the reinforcing cords in all of the stabilizer plies may be made approximately 68. degree. to a meridian line of the tire to provide good cornering stiffness force characteristics in the tire.

US Patent:

41956796, Apr 1, 1980

Filed:

Nov 2, 1978

Appl. No.:

5/956944

Inventors:

Steven E. Schonfeld - Akron OH
Frederick J. Ravagnani - Uniontown OH

Assignee:

The Firestone Tire & Rubber Company - Akron OH

International Classification:

B32B 1506
B32B 3126
C08C 1920
C08F 834

US Classification:

152359

Abstract:

This invention is directed to a rubber skim stock and a product containing the skim stock having improved adhesion between a brassed metal member and contiguous rubber skim stock. The invention lies in the discovery that improved rubber-to-metal adhesion, and adhesion retention, can be obtained by adding to an otherwise conventional rubber skim stock composition appropriate amounts of sulfides of copper. In the practice of this invention, a sulfide of copper is mixed into a rubber skim stock composition, which composition is brought into contiguous relationship with a brassed metal member in the unvulcanized composition followed by vulcanization to yield the end product.

US Patent:

42038740, May 20, 1980

Filed:

Sep 8, 1978

Appl. No.:

5/940540

Inventors:

Adel F. Halasa - Bath OH
Frederick J. Ravagnani - Uniontown OH
Steven E. Schonfeld - Akron OH

Assignee:

The Firestone Tire & Rubber Company - Akron OH

International Classification:

C08K 518
C08L 700
C08L 900

US Classification:

260 3

Abstract:

This invention is directed to a method, a rubber skim stock and a product containing the skim stock having improved adhesion between a metal member and contiguous rubber skim stock. The invention lies in the discovery that improved rubber-to-metal adhesion can be obtained by adding to an otherwise conventional rubber skim stock composition appropriate amounts of a transition salt of p-aminobenzoic acid. The method of this invention comprises the steps of mixing the transition salt of p-aminobenzoic acid into a rubber composition, bringing this composition into contiguous relationship with a metal member in an unvulcanized product and vulcanizing the product to yield the end product.

US Patent:

54940915, Feb 27, 1996

Filed:

Jun 6, 1995

Appl. No.:

8/470606

Inventors:

Roy M. Freeman - Akron OH
William L. Hergenrother - Akron OH
Frederick J. Ravagnani - Uniontown OH

Assignee:

Bridgestone Corporation - Tokyo

International Classification:

B60C 1700
B60C 1500

US Classification:

152517

Abstract:

A sulfur-vulcanizable rubber compound, being devoid of peroxide components, having high modulus and low hysteresis properties subsequent to vulcanization. Such compounds comprise from about 25 to 55 parts by weight of polyisoprene; and from about 75 to 45 parts by weight of a diene polymer selected from the group consisting of homopolymers of conjugated diene monomers and copolymers thereof with monoolefin monomers and EPDM terpolymers to total 100 parts by weight of rubber polymer; from about 50 to 70 parts by weight of a reinforcing filler, per 100 parts by weight wherein at least a portion of at least one of the rubber polymers is grafted with a polymeric metal salt of an. alpha. ,. beta. -ethylenically unsaturated carboxylic acid to form an uncured graft rubber copolymer and at least about 4 parts by weight of a curative selected from the group consisting of sulfur and sulfur donors, per 100 parts by weight of rubber. Pneumatic tires and structural components therefor are manufactured from rubber compounds having high module, low hysteresis and high compressive flex fatigue and provide run flat operation.