RUNFLAT TIRE WITH SIDEWALL COMPONENT CONTAINING HIGH STRENGTH GLASS BUBBLES

• US 20080245460A1
• Filed: 06/13/2008
• Published: 10/09/2008
• Est. Priority Date: 08/10/2005
• Status: Abandoned Application

• Current Assignee: Goodyear Tire & Rubber Company
• Original Assignee: Goodyear Tire & Rubber Company
• Inventors: Zanzig, David John, Frantz, David Mark, Botts, Bina Patel, Brown, Andrew David
• Application Number:
  US12/138,687
• Publication Number:
  US 20080245460A1
• Time in Patent Office: Days
• US Class Current: 152/517
• CPC Class Codes: B60C 1/00 Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
• CPC Class Codes: B60C 1/0008 Compositions of the inner liner
• CPC Class Codes: B60C 1/0016 Compositions of the tread
• CPC Class Codes: B60C 1/0025 Compositions of the sidewalls
• CPC Class Codes: B60C 17/0009 comprising sidewall rubber inserts, e.g. crescent shaped inserts
• CPC Class Codes: B60C 2015/0614 characterised by features of the chafer or clinch portion, i.e. the part of the bead contacting the rim
• CPC Class Codes: C08K 7/28 Glass
• CPC Class Codes: C08L 21/00 Compositions of unspecified rubbers
• CPC Class Codes: C08L 2666/08 Homopolymers or copolymers according to C08L7/00 - C08L21/00; Derivatives thereof
• CPC Class Codes: C08L 7/00 Compositions of natural rubber
• CPC Class Codes: C08L 9/00 Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• CPC Class Codes: Y10T 152/10846 Bead characterized by the chemical composition and or physical properties of elastomers or the like

Abstract

A pneumatic runflat tire comprising a sidewall component comprising a rubber composition comprising at least one diene based elastomer and from about 1 to about 40 phr of glass bubbles having a crush strength of at least 10,000 psi as measured by ASTM D3102-78 in glycerol.

Claims

1. A pneumatic runflat tire comprising at least one carcass reinforcing ply, at least one pair of sidewall wedge inserts, and a belt reinforcing structure, the belt reinforcing structure comprising at least a pair of cross cord belt reinforcing plies, the tire being characterized by a porous elastomeric layer located radially outward of the at least one carcass reinforcing ply and radially inward of the radially outermost cross cord belt reinforcing ply, wherein the porous elastomeric layer has a radial thickness T_C at least equal to 50% of and at most three times the radial thickness T_B, T_P of either an adjacent carcass reinforcing ply or an adjacent cross cord belt reinforcing ply, the sidewall wedge inserts comprising a rubber composition comprising at least one diene based elastomer and from about 1 to about 40 phr of glass bubbles having a crush strength of at least 10,000 psi as measured by ASTM D3102-78 in glycerol.

2. The pneumatic runflat tire of claim 1 wherein said glass bubbles have a crush strength of at least 18,000 psi as measured by ASTM D3102-78 in glycerol.

3. The pneumatic runflat tire of claim 1 wherein said glass bubbles are present in a concentration range of from 3 to 30 phr.

4. The pneumatic runflat tire of claim 1 wherein said glass bubbles have a particle size distribution of 10 percent by weight of 15 microns or less, 50 percent by weight of 30 microns or less, 90 percent by weight of 55 microns or less, and 95 percent by weight of 65 microns or less.

5. The pneumatic runflat tire of claim 1 wherein said glass bubbles have a particle size distribution of 10 percent by weight of 11 microns or less, 50 percent by weight of 30 microns or less, 90 percent by weight of 50 microns or less, and 95 percent by weight of 60 microns or less.

6. The pneumatic runflat tire of claim 1 wherein said glass bubbles have 1 percent or less by weight of particles with a size greater than 149 microns.

7. (canceled)

8. (canceled)