Preparation method of supermolecule/rubber airtight materials

A rubber gas and supramolecular technology, which is applied in the field of improving the gas barrier properties of rubber, can solve the problems of difficult to achieve comprehensive properties of materials, weak geometric effects, and large length and width of clay.

Inactive Publication Date: 2013-10-30
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method has achieved a certain effect, there are still many difficult problems: ① Adding inorganic phase particles can reduce the effective volume of elastomer molecules, but the spherical inorganic particles such as carbon black used in the past have poor geometric barrier properties to gases, and It is easy to aggregate, and it is difficult to play the role of barrier gas; ② In the past, due to the limitation of the type and quantity of surface functional groups, it was difficult for inorganic particles to form physical viscous interaction with gas molecules to block the passage of gas. Be more prominent in bad times
However, there are still many problems in clay/rubber composites: ①The aspect ratio of clay is large

Method used

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  • Preparation method of supermolecule/rubber airtight materials
  • Preparation method of supermolecule/rubber airtight materials
  • Preparation method of supermolecule/rubber airtight materials

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The hydrotalcite / nitrile rubber compound was prepared by emulsion compounding method. Disperse 0.2 g of hydrotalcite in 40 ml of deionized water, stir to disperse evenly to obtain a hydrotalcite solution with a solid content of 0.5 wt%. Then mix and stir the hydrotalcite solution and 100g reactive latex (nitrile latex with a solid content of 40%) to obtain a hydrotalcite / nitrile latex mixture; then pour the mixed solution into 3000ml1wt% calcium chloride solution for flocculation, and the flocculation The product was dried in a blast drying oven at 60°C for 24 hours to prepare a hydrotalcite / nitrile rubber composition; then the hydrotalcite / nitrile rubber composition was added with additives (5 parts of zinc oxide, stearic acid 2 parts, 3 parts of anti-aging agent 4010NA, 1.4 parts of CZ, 0.1 part of M, and 2.8 parts of sulfur) were mixed to obtain a rubber compound. The content of hydrotalcite in the final material was 0.2 phr and that of nitrile rubber was 100 phr. ...

Embodiment 2

[0027] The difference from Example 1 is that 0.5g of hydrotalcite is dispersed in 100ml of deionized water, with a solid content of 0.5wt%, and compounded with 100g of reactive latex (nitrile latex with a solid content of 40%), and the rest of the process and operating steps are the same Example 1. The content of hydrotalcite in the final material was 0.5 phr and that of nitrile rubber was 100 phr. The mechanical properties of the vulcanizate are listed in Table 1. The gas barrier properties of the vulcanizate measured under this test condition are shown in Table 2.

Embodiment 3

[0029] The difference from Example 1 is that 3g of hydrotalcite is weighed and dispersed in 600ml of deionized water, with a solid content of 0.5wt%, and compounded with 100g of reactive latex (nitrile latex with a solid content of 40wt%), and the remaining processes and operating steps are implemented in the same manner example 1. The content of hydrotalcite in the final material was 3 phr and that of nitrile rubber was 100 phr. The mechanical properties of the vulcanizate are listed in Table 1. The gas barrier properties of the vulcanizate measured under this test condition are shown in Table 2.

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Abstract

The invention discloses a preparation method of supermolecule/rubber airtight materials, in order to provide a method for improving the rubber gas barrier property by utilizing supermolecule LDHs (layered double hydroxides). The method comprises the following steps of: adding LDHs as packing into rubber, and preparing a compound of LDHs and rubber by adopting an emulsion compounded method or a mechanical alloying method. The main components comprise 100 parts of base body rubber materials and 0.2-40 part of LDHs by mass; the base body rubber materials are rubber emulsion or solid rubber; the supermolecule LDHs is adopted. The compound material with excellent gas barrier property can be obtained through filling the LDHs into rubber.

Description

technical field [0001] The invention relates to a method for improving the gas barrier performance of rubber, in particular adopting supermolecular LDHs with a layered structure as a filler, filling the rubber so that the gas barrier performance is greatly improved. It is suitable for tire inner tubes and inner liners, and can be applied to many fields of the national economy such as sealing of electronic components, medical rubber plugs, and nuclear, biological and chemical protection. Background technique [0002] The molecular structure of most rubbers is not dense enough and has a large free volume, so it is easy to form air passages. The best application effect in rubber airtight materials is halogenated butyl rubber, which has excellent airtightness mainly due to the dense arrangement of side methyl groups in its molecular structure. At present, adding inorganic phase materials to organic elastomer materials and using the gas barrier properties of inorganic phases to ...

Claims

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Application Information

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IPC IPC(8): C08L9/04C08L9/08C08L7/02C08C1/16C08K13/02C08K3/26C08K3/22C08K5/09C08K3/06C08L9/02C08L9/06C08L7/00
Inventor 刘力徐颖毛迎燕温世鹏段雪胡水卢咏来豆义波
Owner BEIJING UNIV OF CHEM TECH
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