IP Library › Granted Patent US 6,837,288
Granted Patent B2
US 6,837,288 · App. 10/040,778 · Granted Jan 4, 2005

Composition for tire sidewalls and other rubber constructions

Assignee: ExxonMobil Chemical Patents Inc.
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Quick Facts
Patent No.
US 6,837,288
App. No.
10/040,778
Granted
Jan 4, 2005
Kind
B2
Abstract

Rubber blends of brominated isobutylene/para-methylstyrene copolymers of 9.5 to 20 weight percent aromatic monomer content and 0.2 to 1.0 mole percent benzylic bromine content. The blends have good cure characteristics, good adhesion and flex crack resistance, as well as ozone resistance. The blends are useful in tire sidewalls, and other applications.

Claims (17)

1. A multi-layer tire sidewall comprising at least one outer layer and at least one inner layer, the outer layer comprising a blend of a rubber and a copolymer of an isoolefin, para-alkylstyrene and bromoalkylstyrene, wherein the amount of bromoalkylstyrene and the para-alkylstyrene in the copolymer are represented by the following formula:

X=[ 1.91−(0.094 ×Y )]±0.1

wherein “X” is mole percent bromoalkylstyrene and “Y” is the weight percent of para-alkylstyrene and has a value of from 9.5 to 20.

2. The tire sidewall in accordance with claim 1 , wherein the rubber is selected from natural rubber, styrene-butadiene rubber, butyl rubber, halobutyl rubber, polybutadiene rubber, polyisoprene rubber and combinations thereof.

3. The tire sidewall in accordance with claim 1 , wherein the rubber is present from 35 to 65 phr of the blend.

4. The tire sidewall in accordance with claim 1 , wherein the blend comprises one outer layer of the tire sidewall.

5. The tire sidewall in accordance with claim 1 , wherein the outer layer also comprises EPDM rubber.

6. The tire sidewall in accordance with claim 5 , wherein the EPDM rubber is present from 5 to 20 phr of the blend.

7. The tire sidewall in accordance with claim 1 , wherein the rubber is natural rubber.

8. The tire sidewall in accordance with claim 7 , wherein the copolymer and rubber are present in a ratio of from 0.28:1 by weight.

9. The tire sidewall in accordance with claim 1 , wherein the multi-layer tire sidewall also includes an at least one inner layer comprising a unsaturated rubber or blend of unsaturated rubber.

10. The tire sidewall in accordance with claim 9 , wherein the unsaturated rubber is selected from natural rubber, butyl rubber, halobutyl rubber, styrene-butadiene rubber, polybutadiene rubber, or combinations thereof.

11. The tire sidewall in accordance with claim 1 , wherein the isoolefin is isobutylene and the bromoalkylstyrene is para-bromomethylstyrene.

12. The tire sidewall in accordance with claim 1 , wherein the para-alkylstyrene is para-methylstyrene.

13. The tire sidewall in accordance with claim 4 , wherein the outer layer also comprises a filler selected from carbon black and silica, and combinations thereof.

14. The tire sidewall in accordance with claim 9 , wherein the inner layer also comprises a filler selected from carbon black and silica, and combinations thereof.

15. The tire sidewall in accordance with claim 1 , wherein the copolymer is present from 35 to 65 phr of blend.

Assignments (9)
RELEASE OF SECURITY INTEREST Recorded Oct 30, 2013
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS AGENT
To: HOLLEY PERFORMANCE PRODUCTS INC.
Reel/Frame 031509/0293 →
RELEASE OF SECURITY INTEREST RECORDED AT REEL 17105 FRAME 0764 Recorded Jun 28, 2010
From: U.S. BANK NATIONAL ASSOCIATION
To: HOLLEY PERFORMANCE PRODUCTS INC.; HOLLEY PERFORMANCE SYSTEMS, INC.; WEIAND AUTOMOTIVE INDUSTRIES, INC.; NITROUS OXIDE SYSTEMS, INC.; HOLLEY PERFORMANCE PRODUCTS HOLDINGS, INC.
Reel/Frame 024599/0236 →
RELEASE OF SECURITY INTEREST RECORDED AT REEL 20723 FRAME 0246 Recorded Jun 28, 2010
From: U.S. BANK NATIONAL ASSOCIATION
To: HOLLEY PERFORMANCE PRODUCTS INC.; HOLLEY PERFORMANCE SYSTEMS, INC.; WEIAND AUTOMOTIVE INDUSTRIES, INC.; NITROUS OXIDE SYSTEMS, INC.; HOLLEY PERFORMANCE PRODUCTS HOLDINGS, INC.
Reel/Frame 024599/0288 →
SECURITY AGREEMENT Recorded Jun 22, 2010
From: HOLLEY PERFORMANCE PRODUCTS INC.
To: WELL FARGO CAPITAL FINANCE, INC., AS AGENT
Reel/Frame 024563/0922 →
SECURITY AGREEMENT Recorded Apr 2, 2008
From: HOLLEY PERFORMANCE PRODUCTS INC.; HOLLEY PERFORMANCE SYSTEMS, INC.; WEIAND AUTOMOTIVE INDUSTRIES, INC.; NITROUS OXIDE SYSTEMS, INC.; HOLLEY PERFORMANCE PRODUCTS HOLDINGS, INC.
To: WELLS FARGO FOOTHILL, INC.
Reel/Frame 020741/0193 →
SECURITY AGREEMENT Recorded Mar 31, 2008
From: HOLLEY PERFORMANCE PRODUCTS INC.; HOLLEY PERFORMANCE SYSTEMS, INC.; WEIAND AUTOMOTIVE INDUSTRIES, INC.; NITROUS OXIDE SYSTEMS, INC.; HOLLEY PERFORMANCE PRODUCTS HOLDINGS INC.
To: U.S. BANK NATIONAL ASSOCIATION
Reel/Frame 020723/0246 →
SECURITY AGREEMENT Recorded Sep 20, 2007
From: HOLLEY PERFORMANCE PRODUCTS, INC.
To: WELLS FARGO FOOTHILL, INC. (F/K/A FOOTHILL CAPITAL CORPORATION)
Reel/Frame 019850/0082 →
SECURITY AGREEMENT Recorded Feb 2, 2006
From: HOLLEY PERFORMANCE PRODUCTS INC.; HOLLEY PERFORMANCE SYSTEMS, INC.; WEIAND AUTOMOTIVE INDUSTRIES, INC.; LUNATI CAMS, INC.; NITROUS OXIDE SYSTEMS, INC.; EARL'S SUPPLY COMPANY; BIGGS MANUFACTURING, INC.; HOOKER INDUSTRIES, INC.; SO-CAL SPEED SHOPS, INC.; EFASTPARTS.COM, INC.; KHPP HOLDINGS, INC.
To: U.S. BANK NATIONAL ASSOCIATION
Reel/Frame 017105/0764 →
CHANGE OF NAME Recorded Dec 1, 2004
From: EXXON CHEMICAL PATENTS, INC.
To: EXXONMOBIL CHEMICAL PATENTS, INC.
Reel/Frame 015417/0033 →
Continuity (4)
Division 0907110500 · May 1, 1998
Provisional Application 6004563200 · May 5, 1997
Provisional Application 6006259100 · Oct 20, 1997
Related Publication 20020100530A1 · Aug 1, 2002