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A kind of preparation method and application of composite rubber filler

A composite rubber and mixture technology, which is applied in the treatment of fibrous fillers and dyed low-molecular organic compounds, can solve the problems of limited rubber performance improvement, low carboxyl reactivity, poor dispersion performance, etc., and achieve simple operation and good market application The effect of stable value and performance

Active Publication Date: 2022-04-22
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, carbon black is currently used as a rubber filler in rubber, and there are still the following problems: 1. The carboxyl group reactivity on the surface of carbon black is low, and the dispersion performance in the rubber compound is relatively poor, which has limited improvement in the performance of the rubber compound; The in-situ grafting technology of black filler requires high temperature heat refining, and the process is relatively complicated

Method used

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  • A kind of preparation method and application of composite rubber filler
  • A kind of preparation method and application of composite rubber filler
  • A kind of preparation method and application of composite rubber filler

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A kind of preparation method of composite rubber filler, adopts figure 1 The rotary evaporator device in the reaction preparation, the specific preparation method is:

[0036] (1) Add 30g acid carbon black (the mass content of carboxyl group is 0.6-2%), 2g stearic acid, 150g toluene solvent and stir 30min in the reaction vessel 1 of rotary evaporator device, then in reaction vessel 1, drop into 2 Drop DMF and 9g PCl 3 , and the vacuum pump interface 3 is connected to the vacuum device, the rotary evaporator device is evacuated to the vacuum device, and the temperature in the reaction vessel 1 is raised to 55 ° C through the water bath heating device 2, and the reaction is rotated for 3 hours to obtain carbon black modified by acid chloride and A mixture of stearyl chlorides.

[0037] (2) Suspend the reaction device, add 3g of N-cyclohexyl-2-benzothiazole sulfenamide to reaction vessel 1, raise the temperature to 80°C, and react under vacuum for 8h, then continue to he...

Embodiment 2

[0039] Prepare rubber materials according to the formula shown in Table 1. 1# and 2# are carried out by two-stage high-temperature mixing process (in-situ grafted carbon black rubber must be heat-smelted at high temperature, otherwise, the performance is extremely poor), and 3# is carried out by One-stage process at room temperature. Among them, the two-stage high-temperature mixing process in 1# is: adding raw rubber, unmodified carbon black, antioxidant 4020, RD, microcrystalline wax, silane coupling agent and stearic acid into the internal mixer and mixing evenly Finally, raise the temperature of the internal mixer to 160±5°C and heat it for 7 minutes to obtain a first-stage compound rubber; then lower the banbury temperature to below 100°C, add zinc oxide and an accelerator, and mix for 5 minutes to obtain a second-stage compound rubber. Rubber mixing. The two-stage high-temperature mixing process in 2# is: add raw rubber, acyl chloride carbon black, anti-aging agent 4020...

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Abstract

The invention provides a preparation method of a composite rubber filler, comprising the following steps: (1) carrying out acid chlorination treatment on acid carbon black and stearic acid to obtain a mixture of acid chloride modified carbon black and stearyl chloride; (2) Add N-cyclohexyl-2-benzothiazole sulfenamide to the mixture obtained in step (1), heat to 60-80°C, react for 5-8h under vacuum conditions, heat up after the reaction to remove impurities, and obtain a composite rubber filler. The invention also provides a rubber which uses the composite rubber filler as a raw material. The present invention starts with the active carboxyl group on the acidic carbon black, and proposes a composite filler that adopts CBS amination modification to treat carbon black and stearic acid. The filler is used in in-situ grafted rubber. By adopting the conventional one-stage mixing process at room temperature, a compound with better dispersion of carbon black can be obtained, and the rebound and compression permanent deformation properties of the compound are significantly improved.

Description

technical field [0001] The invention belongs to the field of rubber materials, in particular to a preparation method and application of a composite rubber filler. Background technique [0002] Acid carbon black is an important reinforcing agent and filler for rubber products. Its main function is to improve the physical properties of the rubber and reduce the rubber content. In 1970, H.P.Boehm confirmed by experiments that there are a large number of carboxyl functional groups on the surface of acidic carbon black. As shown in (i), the function of carboxyl functional groups can improve the dispersibility and reactivity of carbon black in the rubber system. [0003] [0004] However, carbon black is currently used as a rubber filler in rubber, and there are still the following problems: 1. The carboxyl group reactivity on the surface of carbon black is low, and the dispersion performance in the rubber compound is relatively poor, which has limited improvement in the perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04C08K3/04C08K5/09C08L7/00C08L91/06C08K13/06C08K3/22C09C1/56C09C3/08
CPCC08K9/04C08K3/04C08K5/09C08L7/00C09C1/56C09C3/08C08K2003/2296C08L91/06C08K13/06C08K3/22
Inventor 余海文刘权谭莲影王雪飞吴玲玲穆洪帅肖程远杨瑞蒙肖同亮陈晓艳谢竞慧
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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