Polymer compositions and inner liners for tires

Abstract

Approximately 35m 2 BET specific surface area of ​​1 / g or more, and (a) Sedigraph measurement of d of approximately 2.0 μm or less 50 (b) by a laser of approximately 5.0 μm or less 50 A polymer composition comprising a tire inner liner or halogenated butyl rubber, and (c) microcrystalline talc particles having at least one of an aspect ratio of about 50 to about 100.

Claims

1. Approximately 35m 2 BET specific surface area of ​​1 / g or more, and (a) d by sedigraph of approximately 2.0 μm or less 50 , (b) Using a laser with a wavelength of approximately 5.0 μm or less d 50 , and (c) Aspect ratio of approximately 50 to 100 at least one of the An inner liner for tires, formed from a polymer composition containing microcrystalline talc particles having [a certain characteristic].

2. The inner liner according to claim 1, wherein the polymer composition includes an elastomer such as synthetic rubber or natural rubber, for example, a halogenated butyl rubber such as bromobutyl rubber and / or chlorobutyl rubber.

3. The inner liner according to claim 1 or claim 2, wherein the polymer composition contains about 5 phr or more of the microcrystalline talc particles, for example, about 10 phr or more, or about 50 phr or more, or about 75 phr or more.

4. The inner liner according to any one of claims 1 to 3, wherein the polymer composition contains a total of about 10 phr or less of reinforcing fillers other than the microcrystalline talc particles, for example, about 5 phr or less, or about 1 phr or less.

5. A tire comprising an inner liner as described in any one of claims 1 to 4.

6. Halogenated butyl rubber and approximately 35m 2 BET specific surface area of ​​1 / g or more, and (d) Sedigraph by approximately 2.0 μm or smaller 50 , and (e) Using a laser with a wavelength of approximately 5.0 μm or less d 50 Microcrystalline talc particles having one or both of the above A polymer composition containing [a specific compound].

7. The polymer composition according to claim 6, wherein the halogenated butyl rubber is bromobutyl rubber and / or chlorobutyl rubber.

8. The polymer composition according to claim 6 or claim 7, wherein the polymer composition contains about 5 phr or more of the microcrystalline talc particles, for example, about 10 phr or more, or about 50 phr or more, or about 75 phr or more.

9. The polymer composition according to any one of claims 6 to 8, wherein the polymer composition contains a total of about 10 phr or less of reinforcing fillers other than the microcrystalline talc particles, for example, about 5 phr or less, or about 1 phr or less.

10. A method for manufacturing an inner liner for a tire according to any one of claims 1 to 4, (a) A step of preparing a polymer composition comprising combining an elastomer such as synthetic rubber or natural rubber, such as a halogenated butyl rubber such as bromobutyl rubber and / or chlorobutyl rubber, or a precursor thereof, with microcrystalline talc particles; (b) The step of forming an inner liner from the polymer composition A method that includes this.

11. A method for producing a polymer composition according to any one of claims 6 to 9, comprising the step of combining halogenated butyl rubber or a precursor thereof with microcrystalline talc particles.

12. Use of microcrystalline talc particles having one or both of a BET specific surface area of about 35 m 2 / g or more and a d by Sedigraph of about 2.0 μm or less and a d by laser of about 5.0 μm or less in a polymer composition to reduce the oxygen permeability of the polymer composition as compared to an equivalent polymer composition lacking the talc particle reinforcing filler, wherein the polymer composition may include a halogenated butyl rubber such as bromobutyl rubber and / or chlorobutyl rubber.​​​​

13. A method for reducing the oxygen permeability of a polymer composition, wherein approximately 35 m 2 BET specific surface area of ​​1 / g or more, and d by sedigraph of approximately 2.0 μm or less. 50 and d 50 A method comprising the step of adding microcrystalline talc particles having one or both of the following to a polymer composition, wherein the polymer composition may contain halogenated butyl rubber such as bromobutyl rubber and / or chlorobutyl rubber.

14. The aforementioned microcrystalline talc particles (a) Sedigraph of particles of approximately 1.5 μm or less, for example, approximately 1.0 μm or less, or approximately 0.1 μm to approximately 2.0 μm, for example, approximately 0.1 μm to approximately 1.5 μm, or approximately 0.1 μm to approximately 1.0 μm. 50 , (b) Lasers with a thickness of approximately 4.0 μm or less, for example, approximately 3.0 μm or less, or approximately 1.0 μm to approximately 5.0 μm, for example, approximately 1.0 μm to approximately 4.0 μm, or approximately 1.0 μm to approximately 3.0 μm d 50 , (c) Approximately 40m 2 BET specific surface area of ​​1 / g or more, and / or (d) Aspect ratio of approximately 50 to 90, for example, approximately 60 to 90 An inner liner, tire, polymer composition, method, or use according to any one of claims 1 to 13, comprising:

15. The aforementioned microcrystalline talc particles (a) Using a laser with a thickness of approximately 10.0 μm or less, for example, approximately 7.0 μm or less, or approximately 4.0 μm to approximately 10.0 μm, or approximately 4.0 μm to approximately 7.0 μm d 95 , (b) Using a laser with a thickness of approximately 7.0 μm or less, for example, approximately 5.0 μm or less, or approximately 2.0 μm to approximately 7.0 μm, or approximately 2.0 μm to approximately 5.0 μm 75 , (c) Lasers with a thickness of approximately 3.0 μm or less, for example, approximately 2.0 μm or less, or approximately 0.5 μm to approximately 3.0 μm, or approximately 0.5 μm to approximately 2.0 μm d 25 , (d) Sedigraph of approximately 5.0 μm or less, for example, approximately 3.0 μm or less, or approximately 0.5 μm to approximately 5.0 μm, or approximately 0.5 μm to approximately 3.0 μm 95 , (e) Sedigraph d of approximately 3.0 μm or less, for example, approximately 2.0 μm or less, or approximately 0.1 μm to approximately 3.0 μm, or approximately 0.1 μm to approximately 2.0 μm 75 , (f) Sedigraph d of approximately 1.0 μm or less, for example, approximately 0.5 μm or less, or approximately 0.1 μm to approximately 1.0 μm, or approximately 0.1 μm to approximately 0.5 μm 25 , and / or (g) Approximately 7.5g / m 2 For example, approximately 0.01 g / m 2 ~Approx. 7.5g / m 2 , or approximately 0.01 g / m 2 ~Approx. 4.0g / m 2 Crystallinity index CI An inner liner, tire, polymer composition, method, or use according to any one of claims 1 to 14, comprising:

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