Epoxy natural rubber composite material and preparation method thereof
A technology of natural rubber and composite materials, applied in the field of rubber materials, can solve the problems of easy aging, poor aging resistance, short service life, etc., improve ozone aging resistance and ultraviolet aging resistance, improve aging resistance, Ease of scale-up production
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[0031] The present invention provides the preparation method of the epoxidized natural rubber composite material described in the above technical scheme, which includes the following steps:
[0032] (1) Modification of ammonia water, rare earth oxides and zeolite molecular sieve in an aqueous system to obtain a rare earth modified zeolite molecular sieve dispersion;
[0033] (2) Mixing the rare earth modified zeolite molecular sieve dispersion in the step (1) with a surfactant and a milky epoxidized natural rubber latex to obtain a composite material in a latex state;
[0034] (3) Mixing the composite material in the latex state in the step (2) with the coagulant, and then sequentially pressing, granulating and drying to obtain the composite material in the dry glue state;
[0035] (4) Mixing and vulcanizing the composite material in the dry rubber state in the step (3) with the vulcanization processing aid to obtain an epoxidized natural rubber composite material.
[0036] In the prese...
Example Embodiment
[0041] Example 1
[0042] In parts by weight, add 0.1 part of lanthanum oxide to 100 parts of deionized water, then add 0.5 part of ammonia water (with a concentration of 0.1%), control the ultrasonic power to 500W, and add 0.1 part of 3A molecular sieve under the state of ultrasonic dispersion , Placed in a water bath at 30°C for 5 minutes of continuous ultrasound to prepare a rare earth modified zeolite molecular sieve dispersion, and then add 0.05 parts of sodium dodecylbenzene sulfonate and 100 parts of dry rubber based milky epoxidized natural rubber ( The degree of epoxidation is 2), and the ultrasonic stirring is continued for 1.2 hours to obtain a latex state composite material; 1.5 parts of methanol are added to solidify the latex state composite material, and after solidification, it is tableted, granulated, and dried to obtain a dry rubber state Then add 0.9 parts of sulfur, 1.7 parts of accelerator NS, 5 parts of zinc oxide and 1 part of stearic acid in a double-roll ...
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[0043] Example 2
[0044] In parts by weight, add 10 parts of cerium oxide to 100 parts of deionized water, and then add 10 parts of ammonia water (concentration of 20%), control the ultrasonic power to 700W, and add 30 parts of 4A molecular sieve under the state of ultrasonic dispersion , Placed in a water bath at 80 ℃ for 120 minutes of continuous ultrasound to prepare a rare earth modified zeolite molecular sieve dispersion, and then add 0.8 parts of sodium lauryl sulfate and 100 parts of dry rubber based milky epoxidized natural rubber (epoxy The degree of chemical conversion is 50), and the ultrasonic stirring is continued for 2 hours to obtain the composite material in the latex state; 4 parts of ethanol are added to solidify the composite material in the latex state, and after solidification, the composite material in the dry state is obtained through tableting, granulation and drying. Then, 0.7 parts of sulfur, 2 parts of accelerator NS, 6 parts of zinc oxide and 2 parts ...
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