Tire with indicia containing composite magnetic nanoparticles

• US 8,268,436 B2
• Filed: 12/03/2008
• Issued: 09/18/2012
• Est. Priority Date: 12/15/2007
• Status: Expired due to Fees

• Current Assignee: Goodyear Tire & Rubber Company
• Original Assignee: Goodyear Tire & Rubber Company
• Inventors: Zimmer, Rene Jean, Boes, Claude Ernest Felix, Koster, Georges, Fuchs, Hans-Bernd, Unseld, Klaus, Lauer, Wolfgang Albert
• Primary Examiner(s): Higgins, Gerard
• Assistant Examiner(s): Reddy, Sathavaram I
• Application Number:
  US12/327,216
• Publication Number:
  US 20090155551A1
• Time in Patent Office: 1,385 Days
• Field of Search: 428/195.1, 428/201, 428/206, 428/325, 428/404, 428/432, 428/692.1, 152/450
• US Class Current: 428/195.1
• CPC Class Codes: B29C 2035/0855 using microwave
• CPC Class Codes: B29C 2035/0861 using radio frequency
• CPC Class Codes: B29C 2037/0035 the coating being applied as liquid, gel, paste or the like
• CPC Class Codes: B29C 35/0272 using lost heating elements, i.e. heating means incorporated and remaining in the formed article for preforms with internal stresses B29C61/0625; joining using lost heating elements B29C65/34; making electrically conductive articles B29C70/882
• CPC Class Codes: B29C 37/0025 Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing moulding on preformed layers as inserts B29C70/68; applying fluent material to surfaces in general B05
• CPC Class Codes: B29D 2030/728 Decorating or marking the sidewalls after tyre vulcanization protecting, decorating, marking tyre sidewalls B60C13/00
• CPC Class Codes: B29D 30/06 Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
• CPC Class Codes: B29L 2009/005 coated
• CPC Class Codes: B29L 2030/00 Pneumatic or solid tyres or parts thereof conveyor belts B29L2031/7092; drive belts B29L2031/7094; fourdrinier belts B29L2031/733
• CPC Class Codes: B60C 1/0025 Compositions of the sidewalls
• CPC Class Codes: C08K 2201/01 Magnetic additives
• CPC Class Codes: C08K 9/02 Ingredients treated with inorganic substances
• CPC Class Codes: C08L 21/00 Compositions of unspecified rubbers
• CPC Class Codes: Y10T 152/10495 Pneumatic tire or inner tube
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/24851 Intermediate layer is discontinuous or differential
• CPC Class Codes: Y10T 428/24893 including particulate material
• CPC Class Codes: Y10T 428/252 Glass or ceramic [i.e., fired or glazed clay, cement, etc.] [porcelain, quartz, etc.]
• CPC Class Codes: Y10T 428/2993 Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
• CPC Class Codes: Y10T 428/32 Composite [nonstructural laminate] of inorganic material having metal-compound-containing layer and having defined magnetic layer

Abstract

The present invention is directed to a pneumatic tire comprising one or more indicia formed from an elastomeric coating composition comprising a diene based elastomer and from 1 to 100 parts by weight, per 100 parts by weight of elastomer, of a nanoparticle comprising an inner core of an inorganic magnetic material at least partially covered by an outer layer of silica.

Claims

1. A pneumatic tire comprising one or more indicia formed from an elastomeric coating composition comprising a diene based elastomer and from 1 to 100 parts by weight, per 100 parts by weight of elastomer (phr), of nanoparticles comprising an inner core of an inorganic magnetic material at least partially covered by an outer layer of silica.

2. The pneumatic tire of claim 1, wherein the nanoparticles comprising an inner core of an inorganic magnetic material at least partially covered by an outer layer of silica are present in an amount ranging from 5 to 50 phr.

3. The pneumatic tire of claim 1, wherein the nanoparticles comprising an inner core of an inorganic magnetic material at least partially covered by an outer layer of silica are present in an amount ranging from 10 to 30 phr.

4. The pneumatic tire of claim 1, wherein the inorganic magnetic material is selected from the group consisting of magnetite and maghemite.

5. The pneumatic tire of claim 1, wherein the nanoparticles comprising an inner core of an inorganic magnetic material at least partially covered by an outer layer of silica have a particle size ranging from 3 to 100 nm.

6. The pneumatic tire of claim 1, wherein the nanoparticles comprising an inner core of an inorganic magnetic material at least partially covered by an outer layer of silica have a particle size ranging from 10 to 60 nm.

7. The pneumatic tire of claim 1, wherein the elastomer is selected from the group consisting of natural rubber, synthetic polyisoprene, polybutadiene and styrene-butadiene rubber.

8. The pneumatic tire of claim 1, wherein the indicia have a thickness ranging from 1 to 10 microns.

9. The pneumatic tire of claim 1, wherein the indicia have a thickness ranging from 1 to 5 microns.

10. The pneumatic tire of claim 1, wherein the indicia have a thickness ranging from 1 to 2 microns.

11. The pneumatic tire of claim 1, wherein the elastomeric composition further comprises one or more colorants.

12. The pneumatic tire of claim 1, wherein the indicia are electromagnetically cured.

13. The pneumatic tire of claim 1, wherein the indicia are selected from the group consisting of lettering, trademark figures, logos, sidewall stripes, flowers, dots, short parallel and/or angled stripes and hash marks.