Method for preparing reactive nano calcium carbonate-native rubber composite material

A technology of nano-calcium carbonate and natural rubber, which is applied in the field of preparation of natural rubber composite materials, and can solve problems such as insufficient dispersion, insufficient reinforcement of natural rubber, and reduced quality of mixed rubber.

Inactive Publication Date: 2009-06-17
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nano-CaCO prepared by the above method 3 /NR composite tensile strength only fluctuates in the range of 20-25Mpa
One is that nano-CaCO 3 The primary particles are too fine, it is extremely difficult to mix and disperse directly with rubber machinery, and the rubber material is seriously stuck to the roller, which reduces the quality of the mixe

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 7 parts of nano-calcium carbonate with a particle size of about 15-40nm, add ethanol that just soaks it and rinse it with deionized water, then add 3 parts of isopropyl titanate tristearate and 0.4 parts of ten Sodium dialkylbenzene sulfonate and 100 parts of deionized water, stirred and ultrasonically dispersed for 30 minutes, then added 7 parts of epoxidized natural rubber with an epoxidation degree of 20-50% and a total solid content of 20-25% based on dry rubber Latex, continue to adopt stirring ultrasonic dispersion for 30 minutes, prepare nano-calcium carbonate water dispersion; Adopt 0.5 part of fatty alcohol polyoxyethylene ethers simultaneously to 100 parts with the concentrated natural rubber latex that total solid content is 60% with dry glue to stabilize, constantly Mix the above-mentioned nano-calcium carbonate aqueous dispersion evenly into the stable concentrated natural latex under stirring condition, then add dropwise 1.5 parts of α-methacrylic aci...

Embodiment 2

[0028] Weigh 10 parts of nano-calcium carbonate with a particle size of about 15-40nm, 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 ten Sodium dialkylbenzene sulfonate and 100 parts of deionized water, stirred and ultrasonically dispersed for 30 minutes, then added 10 parts of epoxidized natural rubber with an epoxidation degree of 20-50% and a total solid content of 20-25% based on dry rubber Latex, continue to adopt stirring ultrasonic dispersion for 30 minutes, prepare nano-calcium carbonate water dispersion; Adopt 0.5 part of fatty alcohol polyoxyethylene ethers simultaneously to 100 parts with the concentrated natural rubber latex that total solid content is 60% with dry glue to stabilize, constantly Mix the above-mentioned nano-calcium carbonate aqueous dispersion evenly into the stable concentrated natural rubber latex under stirring conditions, and after stirring evenly, us...

Embodiment 3

[0030] Weigh 5 parts of nano-calcium carbonate with a particle size of about 15-40nm, 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 ten Sodium dialkylbenzene sulfonate and 100 parts of deionized water, stirred and ultrasonically dispersed for 30 minutes, then added 5 parts of epoxidized natural rubber with an epoxidation degree of 20-50% and a total solid content of 20-25% based on dry rubber Latex, continue to adopt stirring ultrasonic dispersion for 30 minutes, prepare nano-calcium carbonate water dispersion; Adopt 0.3 part of fatty alcohol polyoxyethylene ethers simultaneously to 100 parts with the total solid content of dry glue to stabilize the concentrated natural rubber latex of 60%, constantly Mix the above-mentioned nano-calcium carbonate aqueous dispersion evenly into the stable concentrated natural rubber latex under stirring conditions, then add dropwise 1.0 parts of α-methacryli...

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Abstract

The invention provides a preparation method for a reactive nanometer calcium carbonate-natural rubber composite material, which is characterized in that, the nanometer calcium carbonate or proper amount of coupler or anionic surfactant is added to deionized water to be stirred and ultrasonically dispersed, and then proper amount of emulsion epoxidized natural rubber is added to be continuously stirred and ultrasonically dispersed to prepare nanometer calcium carbonate aqueous dispersion; meanwhile, proper amount of non-ionic surfactant is used for stabilizing the proper amount of emulsion natural rubber; the nanometer calcium carbonate aqueous dispersion is uniformly mixed to the emulsion natural rubber under the condition of continuous stirring; the unsaturated carboxylic acid neutralizing solution with the pH value adjusted by potassium hydroxide and a triggered cross linker are dropped into the mixture under 60 DEG C of water bath condition to obtain the latex-stated nanometer calcium carbonate-natural rubber composite material. The vulcanizing film of the composite material can reach 25-30MPa of tensile strength, 800-950 percent of maximum elongation and 3.5-6.0MPa of 300 percent stretching stress.

Description

1. Technical field [0001] The invention relates to a preparation method of a natural rubber composite material, in particular to a preparation method of a reactive nanometer calcium carbonate-natural rubber composite material. 2. Background technology [0002] During the processing of natural rubber, a certain amount of filler compounding agent must be added, the purpose of which is: 1) to meet the requirements of rubber product processing technology; 2) to reinforce rubber and improve the mechanical properties of rubber products; 3) to reduce production cost. At present, the fillers widely used in the rubber industry mainly include carbon black, silica, fiber, clay, calcium carbonate, etc. Among them, carbon black, white carbon black, fiber and other fillers have different degrees of reinforcing effect on rubber, but the price is relatively high and it is easy to generate heat. Inorganic fillers such as pottery clay and calcium carbonate have low prices and are not easy t...

Claims

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Application Information

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IPC IPC(8): C08J3/205C08J3/24C08L7/00C08L15/00C08K3/26
Inventor 曾宗强彭政黄茂芳余和平
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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