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Preparation method of superfine calcium carbonate modified rubber material

A technology of ultra-fine calcium carbonate and modified rubber, which is applied in the field of rubber composite material preparation, can solve the problems of poor physical and mechanical properties that cannot meet the requirements of use, and achieve the effects of broadening the scope of use, reducing costs, and improving compatibility

Inactive Publication Date: 2017-12-29
ANHUI YICAINI FIBER MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of pure natural rubber or synthetic rubber, whether it is unvulcanized raw rubber or vulcanized rubber, its physical and mechanical properties are very poor and it is difficult to meet the requirements of use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation method of superfine calcium carbonate modified rubber material, comprises the following steps:

[0022] Step 1: Put the ultrafine calcium carbonate in a drying oven and dry at 100-110°C for 20 minutes, add the ultrafine calcium carbonate into the GH-100Y high-speed mixer, stir and heat up, when the temperature in the mixer reaches 70°C, Stop heating and add a silane coupling agent of 1% by mass of superfine calcium carbonate, continue high-speed stirring for 10-15min, stop the machine and discharge, and obtain superfine calcium carbonate powder modified by the coupling agent;

[0023] Step 2: The superfine calcium carbonate powder modified by the coupling agent is differentiated by ultrasound at 100kHz for 5h, then placed in the reactor, and 300% of its mass water and 1% of its mass of methyl methacrylate are added , with K 2 SO 8 It is used as an initiator for aqueous solution polymerization. The polymerization is refluxed in a water bath at 82°...

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Abstract

The invention discloses a preparation method of a superfine calcium carbonate modified rubber material and belongs to the technical field of preparation of rubber composite materials. The preparation method comprises the steps of carrying out surface modification on super-fine calcium carbonate; plasticating natural rubber NR; burdening ingredients and mixing; preparing a rubber compound film; and carrying out vulcanization treatment on the rubber compound film. By adopting a silane coupling agent to treat superfine calcium carbonate powder and introducing double bond groups onto the surface of the superfine calcium carbonate powder, methyl methacrylate is subjected to free radical polymerization to obtain superfine calcium carbonate / silane coupling agent / methyl methacrylate composite particles in the presence of superfine calcium carbonate / the silane coupling agent. In addition, the rubber is filled with calcium carbonate subjected to grafted modification, so that mechanical properties of the grafted modification system are superior to those of an unmodified filling system; superfine calcium carbonate is dispersed more uniformly in a rubber matrix, and further the compatibility of calcium carbonate and the rubber is improved as well as the use amount of raw rubber is reduced and the cost of products is reduced.

Description

technical field [0001] The invention belongs to the technical field of rubber composite material preparation, and in particular relates to a preparation method of ultrafine calcium carbonate modified rubber material. Background technique [0002] Composite materials are heterogeneous materials composed of two or more materials with different physical and chemical properties in a microscopic or macroscopic form. Because of pure natural rubber or synthetic rubber, whether it is unvulcanized raw rubber or vulcanized rubber, its physical and mechanical properties are very poor and it is difficult to meet the requirements of use. Therefore, compounding is one of the inevitable trends in the development of rubber materials. Contents of the invention [0003] According to the problems existing in the prior art, the invention provides a preparation method of ultrafine calcium carbonate modified rubber material, which makes the dispersion of ultrafine calcium carbonate in the rubb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08K13/06C08K9/04C08K9/06C08K3/26C08K3/22C08K5/09C08K3/36
CPCC08L7/00C08K2003/2296C08K2003/265C08L51/10C08K13/06C08K9/08C08K9/06C08K3/26C08K3/22C08K5/09C08K3/36
Inventor 章云张贝尼张娃妮柯模松
Owner ANHUI YICAINI FIBER MATERIALS TECH
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