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Silane coupling agent modified clay and butadiene styrene rubber nanometer composite material preparation method

A nano-composite material and silane coupling agent technology, which is applied in the field of preparing clay and styrene-butadiene rubber nano-composite materials, can solve the problems of low tensile strength, large heat energy consumption, and decreased elongation at break of composite materials, and achieve improved interface Strength and mechanical properties, the effect of simplifying the process

Inactive Publication Date: 2007-05-30
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the clay loading increases, the elongation at break of the clay / SBR nanocomposites will drop significantly; the deformation will not reach a sufficient level, and the tensile strength of the composite will be very low
In addition, the organic modification of clay in the preparation process needs to be carried out at a temperature of 70 ° C, which consumes a lot of heat energy

Method used

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  • Silane coupling agent modified clay and butadiene styrene rubber nanometer composite material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Stir 500 g of natural sodium bentonite in 10 L of water, the stirring speed is 1600 rpm, and the time is 5 hours. After mixing evenly, let it stand for 84 hours to obtain a clay water suspension with a solid content of 1.89%; take the clay water suspension 529g and 0.5gKH550 were mixed, stirred at room temperature for 30 minutes, and the stirring speed was 600 rpm to obtain a clay / KH550 aqueous suspension; the clay / KH550 aqueous suspension was stirred and mixed with 493g styrene-butadiene rubber latex at room temperature for 10 minutes, and the stirring speed was 1600 rpm; then dropwise add dilute sulfuric acid with a mass concentration of 1% for flocculation, and the final dosage of dilute sulfuric acid is 100 ml. Rinse the flocs with clean water 10 times to make the flocs pH = 7, and dry them at 50°C for 16 hours to obtain an organically modified floc gel, including 100 parts of styrene-butadiene rubber, 10 parts of clay, and 0.5 parts of modifier KH550.

[0032] On t...

Embodiment 2

[0034] The difference from Example 1 is that the dosage of KH550 is 2g, the dosage of flocculant is 102ml, and the rest of the process conditions and operation steps are the same as in Example 1. In the prepared composite material, there are 100 parts of rubber, 10 parts of clay, and 2 parts of KH550. The mechanical properties of the composite materials are listed in Table 2. The results of the X-ray diffraction curve of the composite material are shown in the curve (b) in Fig. 1 .

Embodiment 3

[0036] The difference from Example 1 is that the dosage of KH550 is 3g, the dosage of flocculant is 104ml, and the rest of the process conditions and operation steps are the same as in Example 1. In the prepared composite material, there are 100 parts of rubber, 10 parts of clay, and 3 parts of KH550. The mechanical properties of the composite materials are listed in Table 2. The gas barrier properties of the composites are listed in Table 3.

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Abstract

The invention discloses a making method of clay modified by silane coupling agent with butadiene styrene rubber nanometer composite material, wherein the silane coupling agent is gamma-aminotriethylene silane and di-(gamma-triethylene propyl) tetrasulfide, which comprises the following steps: making gamma-aminotriethylene silane modified clay liquid suspension under normal temperature; blending with butylbenzene rubber emulsion completely; flocculating; washing; drying; fusing; sulfurizing to obtain the product; adding di-(gamma-triethylene propyl) tetrasulfide to obtain the modified clay and butadiene styrene rubber nanometer composite material of gamma-aminotriethylene silane and di-(gamma-triethylene propyl) tetrasulfide.

Description

technical field [0001] The invention relates to a method for preparing clay and styrene-butadiene rubber nanocomposite material, in particular to a method for preparing clay and styrene-butadiene rubber nanocomposite material through in-situ organic modification of inorganic clay by emulsion intercalation method. Background technique [0002] As a resource-rich mineral, clay is cheap, has good physical and mechanical properties and high chemical resistance, and has a natural nanostructure. When clay is used as a reinforcing agent to prepare clay-rubber composite materials, it is dispersed in the polymer matrix as nano-units, which can exert its nano-effect and meet the requirements of high reinforcement and low density at the same time, so it can be used as a nano-scale rubber Reinforcing agent. [0003] The existing preparation methods of clay / rubber nanocomposites include monomer intercalation in-situ polymerization, melt intercalation, solution intercalation and emulsion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/08C08K9/06
Inventor 张立群贾清秀王益庆吴友平张慧峰陆明
Owner BEIJING UNIV OF CHEM TECH
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