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Application of multifunctional silane coupling agent, rubber product and preparation method
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A technology of silane coupling agent and rubber products, applied in chemical instruments and methods, compounds of group 4/14 elements of the periodic table, organic chemistry, etc.
Active Publication Date: 2021-07-06
ZHUZHOU TIMES NEW MATERIALS TECH
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However, when the commonly used silane coupling agents are used to process rubber materials containing a large amount of inorganic reinforcing fillers, the rubber materials need to be heated at high temperature (140-160°C), and the coupling efficiency needs to be further improved.
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Embodiment 1
[0040] A preparation method of multifunctional silane coupling agent of the present invention, comprises the following steps:
[0041] (1) [HCl] NH 2 (CH 2 ) 3 Cl dehydrochlorination: prepare 15% NaOH aqueous solution, add [HCl] NH 2 (CH 2 ) 3 Cl, stirred in an ice-water bath for 1.5 h; added dichloromethane to extract 4 times, and combined the organic layer; the organic layer was washed 3 times with saturated aqueous sodium chloride solution, added anhydrous magnesium sulfate, stirred and dried for a day and night, filtered, and the filtrate was rotary evaporated to remove the organic solvent , dried under vacuum at 25°C to constant weight to give NH 2 (CH 2 ) 3 Cl.
[0042] (2) take by weighing 24g gamma-chloropropyltriethoxysilane ((C 2 h 5 O) 3 Si(CH 2 ) 3 Cl), 10gNH 2 (CH 2 ) 3 Cl and 90 g of toluene were added into a three-necked round-bottomed flask under nitrogen protection, stirred, the temperature was raised slowly, and the reaction was carried out at...
Embodiment 2
[0046] A preparation method of multifunctional silane coupling agent of the present invention, comprises the following steps:
[0047] (1) [HCl] NH 2 (CH 2 ) 2 Cl dehydrochlorination: prepare 10% KOH aqueous solution, add [HCl] NH 2 (CH 2 ) 2 Cl, stirred in an ice-water bath for 1 h; added ethyl acetate to extract 3 times, and combined the organic layer; the organic layer was washed 4 times with saturated aqueous sodium chloride solution, added anhydrous magnesium sulfate, stirred and dried for one day and night, filtered, and the filtrate was rotary evaporated to remove the organic solvent. Dry under vacuum at 30°C to constant weight to obtain NH 2 (CH 2 ) 2 Cl.
[0048] (2) take by weighing 24g gamma-chloropropyltriethoxysilane ((C 2 h 5 O) 3 Si(CH 2 ) 3 Cl), 8gNH 2 (CH 2 ) 2 Cl and 95 g of dimethylformamide were added into a three-necked round-bottomed flask under nitrogen protection, stirred, the temperature was raised slowly, and the reaction was carried o...
Embodiment 3
[0052] A preparation method of multifunctional silane coupling agent of the present invention, comprises the following steps:
[0053] (1) [HCl] NH 2 (CH 2 ) 3 Cl dehydrochlorination: prepare 30% K 2 CO 3 Aqueous solution, adding [HCl] NH 2 (CH 2 ) 3 Cl, stirred in an ice-water bath for 2 h; added chloroform for extraction 3 times, and combined the organic layers; the organic layer was washed 3 times with saturated aqueous sodium chloride solution, added anhydrous magnesium sulfate, stirred and dried for a day and night, filtered, and the filtrate was rotary evaporated to remove the organic solvent. Dry under vacuum at 30°C to constant weight to obtain NH 2 (CH 2 ) 3 Cl.
[0054] (2) Weigh 20g gamma-chloropropyltrimethoxysilane ((CH 3 O) 3 Si(CH 2 ) 3 Cl), 15gNH 2 (CH 2 ) 3 Cl and 110 g of dimethyl sulfoxide were added into a three-necked round-bottomed flask under nitrogen protection, stirred, the temperature was raised slowly, and the reaction was carried ou...
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Abstract
The invention discloses the application of a multifunctional silane coupling agent, rubber products and a preparation method. The molecular structure of the silane coupling agent contains both a cyclic silicon nitrogen functional group and a (meth)acryloyloxyhydrocarbyl functional group. Synthetic rubber An inorganic reinforcing filler is added, and the surface of the inorganic reinforcing filler contains hydroxyl groups. Inorganic reinforcing filler and multifunctional silane coupling agent are added to the synthetic rubber compound, and conventional mixing process is adopted for mixing. The rubber compound does not need to be heat-cured at high temperature, and then vulcanized to produce the rubber product of the present invention. The multifunctional silane coupling agent of the present invention contains cyclic silicon nitrogen groups and (meth)acryloyloxyhydrocarbyl functional groups, and the inorganic reinforcing filler can be modified at room temperature, and the coupling efficiency is high, and at the same time The synthetic rubber can be modified to fully realize the effect of the inorganic reinforcing filler to reinforce the synthetic rubber, and significantly improve the hardness, tensile strength and modulus stress of the rubber compound.
Description
technical field [0001] The invention belongs to the technical field of application of silane coupling agents, and in particular relates to the application of a multifunctional silane coupling agent in synthetic rubber added with inorganic reinforcing fillers, rubber products and preparation methods. Background technique [0002] At present, in the rubber industry, in order to improve the physical and mechanical properties of rubber products, improve the processing performance of rubber materials and meet certain special functions, and prolong the service life of rubber products, various reinforcing fillers are usually added to rubber. Reinforcing fillers include inorganic reinforcing fillers and organic reinforcing fillers, wherein inorganic reinforcing fillers mainly include hydrated silicates, carbonates, sulfates, metal oxides, borides, and the like. Due to the weak interaction between most inorganic reinforcing fillers and rubber, the formation of bonded glue is less, or...
Claims
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Application Information
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