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Preparation method of reinforced natural rubber composite material by grafting hydroxyethyl methacrylate rubber with modified nano calcium carbonate

A technology of hydroxyethyl methacrylate and nano-calcium carbonate, which is applied in the field of preparation of natural rubber composite materials, can solve problems such as poor rubber reinforcement effect, and achieve the effect of improving dispersion effect and strong bonding effect

Inactive Publication Date: 2014-01-29
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that calcium carbonate has a poor reinforcing effect on rubber through traditional modifiers, by adopting hydroxyethyl methacrylate rubber latex with strong polarity and active hydroxyl groups to modify calcium carbonate grafting Using the excellent compatibility between hydroxyethyl methacrylate rubber latex and natural latex to improve the dispersion effect of calcium carbonate in natural latex and improve the reinforcing effect of calcium carbonate on natural rubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 15 parts of calcium carbonate with a particle size of about 30nm, add ethanol that just soaks it and rinse it with deionized water, then add 3 parts of isopropyl titanate tristearate titanate and 0.4 parts of dodecyl Sodium benzenesulfonate and 100 parts of deionized water were stirred and ultrasonically dispersed for 30 minutes, and then 5 parts of hydroxyethyl methacrylate rubber latex with a graft rate of 5% and a total solid content of 25% were added in terms of dry rubber, and the stirring was continued. Ultrasonic dispersion was carried out for 30 minutes to prepare calcium carbonate emulsion dispersion; 100 parts of concentrated natural rubber latex with a total solid content of 60% based on dry glue was stabilized by using 0.5 part of fatty alcohol polyoxyethylene ether simultaneously, and the above-mentioned The calcium carbonate emulsion dispersion is evenly mixed into the stable concentrated natural rubber latex, and then 1.5 parts of ammonium persulfate...

Embodiment 2

[0042] Weigh 60 parts of calcium carbonate with a particle size of about 60 nm, add ethanol that just soaks it and rinse it with deionized water, then add 4 parts of isopropyl titanate tristearate titanate and 0.5 parts of dodecane Sodium phenyl sulfonate and 100 parts of deionized water were stirred and ultrasonically dispersed for 30 minutes, and then 30 parts of hydroxyethyl methacrylate rubber latex with a grafting rate of 50% and a total solid content of 20% were added in terms of dry glue, and the stirring was continued. Ultrasonic dispersion was carried out for 30 minutes to prepare calcium carbonate emulsion dispersion; 100 parts of concentrated natural rubber latex with a total solid content of 60% based on dry glue was stabilized by using 0.5 part of fatty alcohol polyoxyethylene ether simultaneously, and the above-mentioned The calcium carbonate emulsion dispersion is evenly mixed into the stable concentrated natural rubber latex, and after stirring evenly, it is coa...

Embodiment 3

[0044] Weigh 40 parts of calcium carbonate with a particle size of about 50 nm, add ethanol that just soaks it and rinse it with deionized water, then add 2 parts of isopropyl titanate tristearate and 0.3 parts of dodecane Sodium phenyl sulfonate and 100 parts of deionized water were stirred and ultrasonically dispersed for 30 minutes, and then 20 parts of hydroxyethyl methacrylate rubber latex with a graft rate of 30% and a total solid content of 20% in terms of dry glue were added, and continued to use After stirring and ultrasonically dispersing for 30 minutes, use ethanol to coagulate, tablet, wash, and dry to make a dry gel-like hydroxyethyl methacrylate rubber-grafted calcium carbonate; then 100 parts of dry natural The rubber is blended with the above-mentioned dry colloidal hydroxyethyl methacrylate rubber grafted calcium carbonate, and then 2.0 parts of ammonium persulfate, 3.5 parts of sulfur, 6.0 parts of zinc oxide, 1.0 parts of stearic acid, 1.3 parts of bismuth S...

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Abstract

The invention relates to a preparation method of a reinforced natural rubber composite material by grafting hydroxyethyl methacrylate rubber with modified nano calcium carbonate. The method comprises the following steps: adding calcium carbonate, a proper amount of coupling agent, an anionic surfactant and emulsus hydroxyethyl methacrylate rubber into deionized water so as to prepare a calcium carbonate emulsion dispersoid via ultrasonic dispersion in a stirring manner; meanwhile, stabilizing the emulsus natural rubber with a proper amount of anionic surfactant; evenly mixing the calcium carbonate emulsion dispersoid into the emulsus natural rubber; obtaining a hydroxyethyl methacrylate rubber grafted modified calcium carbonate-natural rubber composite material in a latex state by dripping a trigger crosslinking agent; further performing conventional standard China rubber processing technologies comprising solidification, tabletting, washing, drying and the like on the composite material so as to obtain the hydroxyethyl methacrylate rubber grafted modified calcium carbonate-natural rubber composite material in a dry latex state. The calcium carbonate-natural rubber composite material prepared by using the method provided by the invention has the good performance.

Description

technical field [0001] The invention relates to a preparation method of a natural rubber composite material, in particular to a preparation method of a hydroxyethyl methacrylate rubber graft modified nano-calcium carbonate reinforced natural rubber composite material, belonging to the technical field of rubber material production. Background technique [0002] Natural rubber (NR) is an important polymer material. It is not only a traditional material, but also an important part of contemporary high-tech materials. It plays an irreplaceable and important role in the field of technology. As we all know, if the vast majority of rubber is not reinforced, its comprehensive performance cannot meet the application purpose. In order to improve the tensile strength, tear strength and wear resistance of rubber, improve the processing technology and reduce the cost, reinforcing agents are usually added to the rubber. [0003] Nano calcium carbonate (CaCO 3 ) is a very important func...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08K9/04C08K3/26C08J3/24
Inventor 曾宗强余和平华玉伟刘宏超王启方
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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