Inner liner rubber composition capable of preventing sticking and stacking

Abstract

The invention relates to the technical field of tire processing, and particularly discloses an anti-sticking airtight layer rubber composition which comprises the following components in parts by mass: 0-100 parts of a rubber component, 30-100 parts of reinforcing filler, 50 parts of a plasticizer, 0.5-2.0 parts of an accelerant and 0.5-3 parts of an auxiliary material, the halogenated cross-linked butyl rubber is formed by copolymerization and halogenation of three monomers including isobutene, isoprene and a small amount of divinyl benzene and comprises chlorinated cross-linked butyl rubber and brominated cross-linked butyl rubber, and the problem of sticking of the inner liner rubber composition is solved by adopting the halogenated cross-linked butyl rubber. And more cars / tables can be stored, the production efficiency is improved, the energy consumption is reduced, and the storage space is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber materials, and in particular to an airtight layer rubber composition capable of preventing sticking. Background Art

[0002] The airtight layer rubber composition uses halogenated butyl rubber to ensure the airtightness of the tire. Halogenated butyl rubber is obtained by polymerization of isobutylene and a small amount of isoprene. Halogenated butyl rubber has a small molecular weight and is more likely to stick to the tire than natural, styrene-butadiene, butadiene and other general-purpose rubbers. Usually, one table is required for each vehicle to avoid the airtight layer rubber composition from sticking to the tire. The present application uses a halogenated cross-linked butyl rubber to improve the problem of the airtight layer rubber composition sticking to the tire. Summary of the invention

[0003] The object of the present invention is to provide an airtight layer rubber composition that prevents sticking, thereby solving the problem of sticking of the airtight layer rubber composition in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An airtight layer rubber composition for preventing sticking comprises the following components by weight: 0-100 parts of a rubber component, 30-100 parts of a reinforcing filler, 50 parts of a plasticizer, 0.5-2.0 parts of an accelerator, and 0.5-3 parts of an auxiliary material.

[0006] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0007] In an optional embodiment, the rubber component is halogenated butyl rubber and / or halogenated cross-linked butyl rubber.

[0008] In an optional scheme: the halogenated cross-linked butyl rubber is obtained by copolymerizing three monomers, namely, isobutylene, isoprene and a small amount of divinylbenzene, and then halogenating them, and includes chlorinated cross-linked butyl rubber and brominated cross-linked butyl rubber.

[0009] In an alternative embodiment, the reinforcing filler is carbon black, and the carbon black is all types currently known in the industry. The preferred carbon black is those with an iodine absorption value between 20 g / kg and 300 g / kg, especially those between 36 g / kg and 82 g / kg.

[0010] In an alternative embodiment, the accelerator is dibenzothiazyl disulfide, which can be used as an accelerator and scorch retarder for halogenated butyl rubber.

[0011] In an alternative embodiment: the accelerator is a blend of polybutylphenol disulfide and stearic acid, light brown particles, sulfur content 26.4-28.4%.

[0012] In an optional embodiment, the auxiliary materials include one or more of stearic acid, zinc oxide, and oil-filled sulfur powder.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present application adopts a halogenated cross-linked butyl rubber to improve the sticking problem of the airtight layer rubber composition. By improving the sticking problem, more carts / tables can be stored, production efficiency is improved, energy consumption is reduced, and storage space is saved. DETAILED DESCRIPTION

[0015] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] The mixing of the rubber composition can be accomplished by methods known to those skilled in the art of rubber mixing. For example, in general, the components are mixed in at least two stages, i.e., at least one non-productive mixing stage followed by a productive mixing stage. The rubber and the composition resin are mixed in one or more non-productive mixing stages. Below, a specific description will be given based on embodiments of the present invention:

[0017] Example 1

[0018] Following the formulation of Table 1, the rubber compositions are referred to herein as Examples 1-3 and Comparative Example 1. Comparative Example 1 is not used in the present invention.

[0019] The chemicals other than sulfur and vulcanization accelerator were mixed for 5 minutes using F370 and GK400 internal mixers, and then sulfur and vulcanization accelerator were mixed in F270 internal mixer.

[0020] Sticking can be observed by observing the production of the next section of the mix;

[0021] Table 1 Example 1 Scheme:

[0022]

[0023] Table 2 Physical and mechanical properties;

[0024] Test items Comparative Example 1 Example 1 Example 2 Example 3 Tensile stress Se100 MPa 1.0 1.1 1.2 1.0 Tensile stress Se300 MPa 2.9 3.0 3.1 3.0 Hardness Shore A ° 43.8 44.2 44.1 43.1 Tensile strength TSb MPa 8.8 8.6 8.5 8.4 Elongation at break Es ％ 772 763 751 736

[0025] Comparative Example 1 requires storage according to 1 car and 1 table in both the non-productive stage and the productive stage, while Examples 1 to 3 can be stored according to 2 cars and 1 table in the non-productive stage and 3 cars and 1 table in the productive stage. The physical and mechanical properties of Examples 1 to 3 meet the processing requirements;

[0026] Example 2

[0027] Table 3 Example 2 scheme;

[0028]

[0029] Table 4 Physical and mechanical properties;

[0030] Test items Comparative Example 2 Example 4 Example 5 Example 6 Tensile stress Se100 MPa 1.6 1.7 1.5 1.8 Tensile stress Se300 MPa 3.8 3.9 3.7 4.0 Hardness Shore A ° 53.8 54.2 55.3 53.9 Tensile strength TSb MPa 8.9 8.8 8.4 8.2 Elongation at break Es ％ 646 659 635 667

[0031] Comparative Example 2: The non-productive stage and the productive stage should be stored according to 2 cars and 1 table in the non-productive stage and 3 cars and 1 table in the productive stage. Example 4-Example 6: The non-productive stage can be stored according to 3 cars and 1 table in the non-productive stage and 5 cars and 1 table in the productive stage.

[0032] The physical and mechanical properties of Examples 4-6 meet the processing requirements;

[0033] Halogenated (including chlorinated and brominated) cross-linked butyl rubber is made by copolymerizing isobutylene, isoprene and a small amount of divinylbenzene and then halogenating them. Due to the introduction of divinylbenzene, the macromolecular chain has a small amount of side chain vinyl, which is easy to cross-link. This copolymer has a certain degree of cross-linking and does not cold flow.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-sticking airtight layer rubber composition, characterized in that: Includes the following quality components: 0-100 parts of rubber component, 30-100 parts of reinforcing filler, 50 parts of plasticizer, 0.5-2.0 parts of accelerator, and 0.5-3 parts of auxiliary materials.

2. The anti-sticking airtight layer rubber composition according to claim 1, characterized in that: The rubber component is: halogenated butyl rubber and / or halogenated cross-linked butyl rubber.

3. The anti-sticking airtight layer rubber composition according to claim 1, characterized in that: The halogenated cross-linked butyl rubber is obtained by copolymerizing isobutylene, isoprene and a small amount of divinylbenzene and then halogenating the monomers, and includes chlorinated cross-linked butyl rubber and brominated cross-linked butyl rubber.

4. The anti-sticking airtight layer rubber composition according to claim 1, characterized in that: The reinforcing filler is carbon black, and the carbon black is those having an iodine absorption value between 20 g / kg and 300 g / kg, especially between 36 g / kg and 82 g / kg.

5. The anti-sticking airtight layer rubber composition according to claim 1, characterized in that: The carbon black has an iodine absorption value between 36 g / kg and 82 g / kg.

6. The anti-sticking airtight layer rubber composition according to claim 1, characterized in that: The accelerator is dibenzothiazyl disulfide.

7. The anti-sticking airtight layer rubber composition according to claim 1, characterized in that: The accelerator is a blend of polybutylphenol disulfide and stearic acid, light brown particles, and a sulfur content of 26.4-28.4%.

8. The anti-sticking airtight layer rubber composition according to claim 1, characterized in that: The auxiliary materials include one or more of stearic acid, zinc oxide, and oil-filled sulfur powder.

Images