Rubber coating for electronic communication module, electronic module containing same, and related methods

Patent metadata

Field	Value
Publication number	US-10486477-B2
Application number	US-201615770553-A
Country	US
Kind code	B2
Filing date	Nov 8, 2016
Priority date	Nov 9, 2015
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

Disclosed herein is a rubber coating for an electronic communication module, the coating comprising 100 phr of at least one diene-based elastomer, and at least one nano-sized inorganic material having a dielectric constant of at least 9 and a loss tangent of less than 0.1, wherein the coating when cured has a dielectric constant of at least 4.5 and a loss tangent of less than 0.01. Also disclosed are an electronic communication module comprising a radio device having at least a portion of its outer surface surrounded by the rubber coating (i.e., a rubber composition of specified composition), tires or tire retreads incorporating the electronic communication module, and methods for increasing the dielectric constant of a rubber coating without increasing its loss tangent.

First claim

What is claimed is:

1. An electronic communication module for a tire comprising a radio device having at least a portion of its outer surface surrounded by a rubber coating, the coating comprising:
(a) 100 parts of at least one diene-based elastomer;
(b) about 20 to about 100 parts per hundred parts of the at least one diene elastomer of at least one nano-sized inorganic material having a dielectric constant of at least 9 and a loss tangent of less than 0.1; and
no more than 5 parts per hundred parts of the at least one diener elastomer of reinforcing carbon black having a particle size of 10 nm to 1000 nm.
wherein the coating when cured has a dielectric constant of at least 4.5 and a loss tangent of less than 0.01.

2. The electronic communication module of claim 1 , wherein the nano-sized inorganic material contains a metal selected from the group consisting of alkaline earth metals, transition metals, and combinations thereof.

3. The electronic communication module of claim 1 , wherein the nano-sized inorganic material comprises a metal oxide and the metal of the metal oxide is selected from the group consisting of alkaline earth metals, transition metals, and combinations thereof.

4. The electronic communication module claim 1 , wherein the nano-sized inorganic material is selected from the group consisting of titanium oxide compounds, titanium dioxide, strontium titanate, aluminum oxide, titanium aluminum oxide, magnesium oxide, magnesium titanate, barium strontium titanate, hafnium oxide, zirconium oxide, cerium oxide, tantalum oxide, barium titanate, and combinations thereof.

5. The electronic communication module of claim 1 , wherein the nano-sized inorganic material comprises titanium dioxide.

6. The electronic communication module of claim 1 , wherein the at least one nano-sized inorganic material is present in an amount of about 40 to about 90 parts per hundred parts of the at least one diene based elastomer.

7. The electronic communication module of claim 1 , wherein the nano-sized inorganic material has a particle size of 100 nanometers or less in at least two dimensions.

8. The electronic communication module of claim 1 , wherein the coating contains 1 to 120 parts per hundred parts of the at least one diene based elastomer of non-reinforcing carbon black.

9. The electronic communication module of claim 1 , wherein the coating contains 1-120 parts per hundred parts of the at least one diene based elastomer of non-reinforcing carbon black.

10. The electronic communication module of claim 1 having a thickness of no more than 4 mm.

11. The electronic communication module of claim 1 , wherein the radio device includes an antenna with an outer surface and having a length of no more than 110 mm, and a majority of the outer surface of the antenna is covered by the rubber coating.

12. A tire or tire retread comprising the electronic communication module of claim 11 .

13. A method for increasing the dielectric constant of a rubber coating for an electronic communication module for a tire comprising a radio device having at least a portion of its outer surface surrounded by the rubber composition without increasing its loss tangent, the method comprising
incorporating at least one nano-sized inorganic material having a dielectric constant of at least 9 and a loss tangent of less than 0.1 into 100 parts of at least one diene-based elastomer, wherein about 20 to about 100 parts per hundred parts of the at least one diene elastomer are incorporated and no more than 5 parts per hundred parts of the at least one diene elastomer of reinforcing carbon black having a particle size of 10 nm up to 1000 nm are incorporated, such that the resulting rubber coating for the electronic communication module for a tire when cured has a dielectric constant of at least 4.5 and a loss tangent of less than 0.01.

14. The method of claim 13 , wherein the at least one nano-sized inorganic material is present in an amount of about 40 to about 90 parts per hundred parts of the at least one diene based elastomer.

15. The method of claim 13 , wherein the nano-sized inorganic material comprises titanium dioxide.

16. The method of claim 13 , wherein the coating contains 1-120 parts per hundred parts of the at least one diene based elastomer of non-reinforcing carbon black.

17. The method of claim 13 , wherein the at least one nano-sized inorganic material meets at least one of the following:
(a) contains a metal selected from the group consisting of alkaline earth metals, transition metals, and combinations thereof;
(b) comprises a metal oxide wherein the metal of the metal oxide is selected group the group consisting of alkaline earth metals, transition metals, and combinations thereof; or
(c) is selected from the group consisting of titanium oxide compounds, titanium dioxide, strontium titanate, aluminum oxide, titanium aluminum oxide, magnesium oxide, magnesium titanate, barium strontium titanate, hafnium oxide, zirconium oxide, cerium oxide, tantalum oxide, barium titanate, and combinations thereof.

18. The method of claim 13 , wherein the rubber coating has a thickness of no more than 4 mm.

19. The method of claim 18 , wherein the nano-sized inorganic material comprises titanium dioxide.

20. An electronic communication module for a tire comprising a radio device having at least a portion of its outer surface surrounded by a rubber coating, the coating comprising:
(a) 100 parts of at least one diene-based elastomer selected from the group consisting of styrene-butadiene rubber, polybutadiene, natural rubber, polyisoprene, and combinations thereof;
(b) about 20 to about 100 parts per hundred parts of the at least one diene elastomer of at least one nano-sized inorganic material selected from the group consisting of titanium oxide compounds, titanium dioxide, strontium titanate, aluminum oxide, titanium aluminum oxide, magnesium oxide, magnesium titanate, barium strontium titanate, hafnium oxide, zirconium oxide, cerium oxide, tantalum oxide, barium titanate, and combinations thereof and having a dielectric constant of at least 9 and a loss tangent of less than 0.1; and
no more than 5 parts per hundred parts of the at least one diene elastomer of reinforcing carbon black having a particle size of 10 nm up to 1000 nm and no more than 10 parts per hundred parts of the at least one diene elastomer of silica filler,
wherein the coating has a thickness of no more than 4 mm and when cured has a dielectric constant of at least 4.5 and a loss tangent of less than 0.01.

Assignees

• Bridgestone Americas Tire Operations Llc

Inventors

• Balnis Craig R
• Wilson Paul B

Classifications

• G06K19/07764

  the adhering arrangement making the record carrier attachable to a tyre (tyre temperature or pressure control arrangements, see B60C23/00) · CPC title

• G06K19/07724

  the record carrier being at least partially made by a molding process (molding in general B29C45/14) · CPC title

• C09D109/00

  Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons · CPC title

• B60C23/0493 Primary

  for attachment on the tyre · CPC title

• G06K19/07728

  the record carrier comprising means for protection against impact or bending, e.g. protective shells or stress-absorbing layers around the integrated circuit · CPC title