Supported rubber processing aid as well as preparation method and application thereof

Abstract

The invention discloses a supported rubber processing aid as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, mixing a silane coupling agent and an inorganic carrier in an organic solvent, and performing stirring reaction for 1-5h under the condition of the temperature being 60-100 DEG C to obtain an intermediate product; then, adding a rubber processing aid with the mass being equivalent to 0.1-2 times of that of the silane coupling agent in the reaction product, and performing stirring reaction for 3-5 hours at 50-80 DEG C;and filtering and drying the product to obtain the supported rubber processing aid. The prepared supported rubber processing aid can improve the interface effect between a rubber matrix and a filler,and thus improves the processing performance of rubber. In addition, the supported rubber processing aid prepared by the method has both the characteristics of reinforcement and interface improvement,and the mechanical performance of a composite is improved. Meanwhile, the preparation process is simple to operate, saves energy, is environmentally friendly, and a wide application prospect is achieved in rubber industrial production.

Description

technical field

[0001] The invention belongs to the field of rubber additives and rubber processing, and in particular relates to a loaded rubber processing additive and a preparation method thereof. Background technique

[0002] Rubber processing aids are substances used to improve the processing performance of rubber materials, including improving the properties of rubber materials such as mixing, calendering, extrusion, and molding in open mills or internal mixers. Adding a small amount of processing aids in the rubber can shorten the mixing time, improve the dispersion of reinforcing fillers in the rubber, improve the two-phase structure of the rubber and improve the physical and mechanical properties of the vulcanized rubber. With the development of the rubber industry, the requirements for the performance of rubber materials are getting higher and higher, so the development of rubber processing aids becomes particularly important. At present, the rubber processing tec...

Examples

Embodiment 1

[0033] Add the silane coupling agent KH550 (10g) and silicon dioxide with a mass ratio of 1:2 to 300ml of absolute ethanol, and add 10g of deionized water, ultrasonically disperse the resulting mixture for 30min, and stir the reaction at 80°C for 3 Hours; then 5g of oleic acid was added to the solution, and the reaction was stirred at 60°C for 4 hours. The reaction product is filtered and dried to obtain the supported rubber processing aid OA-s-SiO 2 .

[0034] The Raman spectrum of the above-mentioned loaded rubber processing aid is as follows figure 1 As shown, it can be found from the figure that the modified SiO 2 At 2800~3000cm -1 and 1320cm -1 ~1450cm -1 The range of -CH 2 and -CH 3 Superimposed stretching vibration peaks and bending vibration peaks; after further grafting of OA, SiO 2 -s-OA spectrum at 1655cm -1 The characteristic absorption peak of the C=C double bond appeared at , indicating that the oleic acid molecules had been successfully loaded on the su...

Embodiment 2

[0042] Add silane coupling agent KH550 (5g) and silicon dioxide with a mass ratio of 1:1 to 300ml of absolute ethanol, and add 10g of deionized water, ultrasonically disperse the resulting mixture for 30min, and stir at 80°C for reaction 3 hours; further, 5 g of oleic acid in the solution was stirred and reacted at 60° C. for 4 hours. The reaction product is filtered and dried to obtain the supported rubber processing aid OA-s-SiO 2 . The filler is applied to the natural rubber / silica composite material, the basic formula is shown in Table 3, and the vulcanization characteristic parameters of the corresponding compound are shown in Table 4.

[0043] After the filler is modified, the compound rubber NR / SiO 2The scorch time and normal vulcanization time of -s-OA have decreased significantly, and the vulcanization rate has increased significantly. The reduction in the torque of the compound rubber also clearly shows that the processing performance of the rubber compound is imp...

Embodiment 3

[0051] Add silane coupling agent KH550 (2.5g) and silicon dioxide with a mass ratio of 1:4 to 300ml of absolute ethanol, and add 10g of deionized water, ultrasonically disperse the resulting mixture for 30min, and stir the reaction at 80°C 3 hours; further, increase the amount of oleic acid added, add 20 g of oleic acid to the solution, and stir and react at 60° C. for 4 hours. The reaction product is filtered and dried to obtain the supported rubber processing aid OA-s-SiO 2 -2. The filler was applied to the styrene-butadiene rubber / silica composite. Thermogravimetric analysis showed that the grafting ratio of the supported processing aid was about 7%. The tensile strength and tear strength of SBR vulcanizate are 19Mpa and 33Mpa respectively. Compared with the addition of unmodified SBR vulcanizate, the mechanical properties have been greatly improved, but compared with the loading type processing aid added with 10g oleic acid agent, the improvement is not obvious.

technical field

[0001] The invention belongs to the field of rubber additives and rubber processing, and in particular relates to a loaded rubber processing additive and a preparation method thereof. Background technique

[0002] Rubber processing aids are substances used to improve the processing performance of rubber materials, including improving the properties of rubber materials such as mixing, calendering, extrusion, and molding in open mills or internal mixers. Adding a small amount of processing aids in the rubber can shorten the mixing time, improve the dispersion of reinforcing fillers in the rubber, improve the two-phase structure of the rubber and improve the physical and mechanical properties of the vulcanized rubber. With the development of the rubber industry, the requirements for the performance of rubber materials are getting higher and higher, so the development of rubber processing aids becomes particularly important. At present, the rubber processing tec...

Examples

Embodiment 1

[0033] Add the silane coupling agent KH550 (10g) and silicon dioxide with a mass ratio of 1:2 to 300ml of absolute ethanol, and add 10g of deionized water, ultrasonically disperse the resulting mixture for 30min, and stir the reaction at 80°C for 3 Hours; then 5g of oleic acid was added to the solution, and the reaction was stirred at 60°C for 4 hours. The reaction product is filtered and dried to obtain the supported rubber processing aid OA-s-SiO 2 .

[0034] The Raman spectrum of the above-mentioned loaded rubber processing aid is as follows figure 1 As shown, it can be found from the figure that the modified SiO 2 At 2800~3000cm -1 and 1320cm -1 ~1450cm -1 The range of -CH 2 and -CH 3 Superimposed stretching vibration peaks and bending vibration peaks; after further grafting of OA, SiO 2 -s-OA spectrum at 1655cm -1 The characteristic absorption peak of the C=C double bond appeared at , indicating that the oleic acid molecules had been successfully loaded on the su...

Embodiment 2

[0042] Add silane coupling agent KH550 (5g) and silicon dioxide with a mass ratio of 1:1 to 300ml of absolute ethanol, and add 10g of deionized water, ultrasonically disperse the resulting mixture for 30min, and stir at 80°C for reaction 3 hours; further, 5 g of oleic acid in the solution was stirred and reacted at 60° C. for 4 hours. The reaction product is filtered and dried to obtain the supported rubber processing aid OA-s-SiO 2 . The filler is applied to the natural rubber / silica composite material, the basic formula is shown in Table 3, and the vulcanization characteristic parameters of the corresponding compound are shown in Table 4.

[0043] After the filler is modified, the compound rubber NR / SiO 2The scorch time and normal vulcanization time of -s-OA have decreased significantly, and the vulcanization rate has increased significantly. The reduction in the torque of the compound rubber also clearly shows that the processing performance of the rubber compound is imp...

Embodiment 3

[0051] Add silane coupling agent KH550 (2.5g) and silicon dioxide with a mass ratio of 1:4 to 300ml of absolute ethanol, and add 10g of deionized water, ultrasonically disperse the resulting mixture for 30min, and stir the reaction at 80°C 3 hours; further, increase the amount of oleic acid added, add 20 g of oleic acid to the solution, and stir and react at 60° C. for 4 hours. The reaction product is filtered and dried to obtain the supported rubber processing aid OA-s-SiO 2 -2. The filler was applied to the styrene-butadiene rubber / silica composite. Thermogravimetric analysis showed that the grafting ratio of the supported processing aid was about 7%. The tensile strength and tear strength of SBR vulcanizate are 19Mpa and 33Mpa respectively. Compared with the addition of unmodified SBR vulcanizate, the mechanical properties have been greatly improved, but compared with the loading type processing aid added with 10g oleic acid agent, the improvement is not obvious.

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