Tire with EPDM-based component

• US 6,279,633 B1
• Filed: 03/23/1999
• Issued: 08/28/2001
• Est. Priority Date: 03/23/1999
• Status: Expired due to Fees

• Current Assignee: Goodyear Tire & Rubber Company
• Original Assignee: Goodyear Tire & Rubber Company
• Inventors: Corvasce, Filomeno Gennaro
• Primary Examiner(s): Knable, Geoffrey L.
• Application Number:
  US09/274,171
• Time in Patent Office: 889 Days
• Field of Search: 152/523, 152/524, 152/525, 152/DIG.12, 524/492
• US Class Current: 152/525
• CPC Class Codes: B60C 1/0025 Compositions of the sidewalls
• CPC Class Codes: B60C 13/04 having annular inlays or covers, e.g. white sidewalls
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08K 5/548 containing sulfur C08K5/5477 takes precedence
• CPC Class Codes: C08L 23/16 Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; 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

Abstract

The invention relates to a tire having a sidewall component of an EPDM-based rubber composition prepared with specified precipitated silica reinforcement and an organosilane disulfide material. In one aspect, such rubber composition may be exclusive of carbon black and may thereby be of color other than black.

Claims

1. A tire having a sidewall component of a rubber composition which is comprised of, based on 100 parts (phr) by weight elastomer (A) about 30 to about 50 phr of EPDM, about 20 to about 40 phr of natural cis 1,4-polyisoprene rubber and about 20 to about 40 phr of cis 1,4-polybutadiene (B) about 30 to about 50 phr of reinforcing filler as precipitated silica to the exclusion of carbon black;

wherein said precipitated silica has a BET surface area in a range of about 110 to about 130 m²/g and (C) a liquid organosilane polysulfide comprising bis-(3-ethoxysilylpropyl) polysulfide, or bis-(3-methoxysilylpropyl) polysulfide, having an average of from 2 to 2.6 sulfur atoms in its polysulfidic bridge;

wherein

said EPDM contains about 60 to about 85 mole percent units derived from ethylene and contains about 2 to about 5 percent units derived from a non-conjugated diene and wherein said non-conjugated diene comprises 1,4-hexadiene or ethylidene norbornene.

2. The tire of claim 1 wherein up to 15 phr of a non-conjugated diene-based elastomer is added to said rubber composition selected from isoprene/butadiene rubber and trans 1,4-polybutadiene rubber.