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A kind of preparation method of kaolin/rubber nano composite material

A technology of rubber nano-composite materials, applied in the field of preparation of kaolin/rubber nano-composite materials, can solve the problems of rubber cohesion, unfavorable filler and rubber uniform mixing, etc., and achieve the effect of good mechanical properties

Active Publication Date: 2021-11-09
ZAOZHUANG SANXING ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in emulsion blending, acidic fillers are directly added to rubber latex, which will lead to coagulation of rubber, which is not conducive to the uniform mixing of fillers and rubber

Method used

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  • A kind of preparation method of kaolin/rubber nano composite material
  • A kind of preparation method of kaolin/rubber nano composite material
  • A kind of preparation method of kaolin/rubber nano composite material

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0046] 1) The kaolin suspension with a solid content of 25% was mixed with bis-(3-(triethoxysilyl)-propyl)-tetrasulfide hydrolyzate, stirred and heated at 90°C for 1 h, wherein the bis- The mass of (3-(triethoxysilicon)-propyl)-tetrasulfide is 2% of the mass of kaolin to obtain a modified kaolin suspension, and then the modified kaolin suspension is cooled to room temperature.

[0047] 2) Add the suspension containing 50 parts of modified kaolin to the rubber emulsion (20% solid content) containing 100 parts of styrene-butadiene rubber solids, and the mass ratio of the addition speed of the modified kaolin suspension to the coagulated dry matter is 0.05 ml / min g, while stirring rapidly, to obtain the modified kaolin / rubber mixture;

[0048] 3) The KAl(SO 4 ) 2 The aqueous solution is used as a coagulant, and the coagulant is added to the modified kaolin / styrene-butadiene rubber mixture obtained in step 2) until the mixed system is completely coagulated to form a granular coa...

experiment example 2

[0052] 1) Mix the kaolin suspension with a solid content of 25% and vinyltriethoxysilane hydrolyzate, stir and heat at 90° C. for 1 h, wherein the mass of vinyltriethoxysilane is 2% of the mass of kaolin, The modified kaolin suspension is obtained, and then the modified kaolin suspension is cooled to room temperature.

[0053] 2) With the suspension containing 50 parts of modified kaolin, add the rubber emulsion (solid content is 20%) containing 100 parts of styrene-butadiene rubber solids, the mass ratio of the addition speed of modified kaolin suspension to the condensed dry product is 0.03ml / min g, while stirring rapidly to obtain the modified kaolin / rubber mixture;

[0054] 3) The KAl(SO 4 ) 2 The aqueous solution is used as a coagulant, and the coagulant is added to the modified kaolin / styrene-butadiene rubber mixture obtained in step 2) until the mixed system is completely coagulated to form a granular coagulant;

[0055] 4) Washing, drying and dehydrating the granul...

experiment example 3

[0058] 1) The kaolin suspension with a solid content of 25% was mixed with bis-(3-(triethoxysilyl)-propyl)-tetrasulfide hydrolyzate, stirred and heated at 90°C for 1 h, wherein the bis- The mass of (3-(triethoxysilicon)-propyl)-tetrasulfide is 2% of the mass of kaolin to obtain a modified kaolin suspension, and then the modified kaolin suspension is cooled to room temperature.

[0059] 2) Add the suspension containing 50 parts of modified kaolin to the rubber emulsion (solid content is 50%) containing 100 parts of natural rubber solids, the mass ratio of the addition speed of the modified kaolin suspension to the coagulated dry product is 0.04ml / min g, while stirring rapidly to obtain the modified kaolin / natural rubber mixture;

[0060] 3) The KAl(SO 4 ) 2 The aqueous solution is used as a coagulant, and the coagulant is added to the modified kaolin / natural rubber mixture obtained in step 2) until the mixed system is completely coagulated to form a granular coagulant;

[0...

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Abstract

The invention relates to a preparation method suitable for kaolin / rubber nano composite material. Including: 1) using 95% ethanol as a solvent, glacial acetic acid as a catalyst, adding a silane modifier, and stirring to obtain a silane hydrolyzate; 2) uniformly mixing the kaolin suspension and the silane hydrolyzate, heating to obtain a modified kaolin suspension 3) cooling the modified kaolin suspension to room temperature, then slowly adding it into the rubber emulsion and stirring and mixing to obtain a modified kaolin / rubber mixture; 4) adding a coagulant solution to the modified kaolin / rubber mixture obtained , forming granular aggregates; 5) washing, drying and dehydrating the granular aggregates to form aggregated dry matter; 6) kneading and vulcanizing the aggregated dried matter to obtain modified kaolin / rubber nanocomposites. In the composite material prepared by the invention, the kaolin is well dispersed in the rubber matrix, and has good vulcanization performance, mechanical performance, dynamic mechanical performance and airtight performance.

Description

technical field [0001] The invention belongs to the field of preparation of clay / rubber nano composite materials, in particular, relates to a preparation method suitable for kaolin / rubber nano composite materials. Background technique [0002] Mechanical blending is the most widely used preparation process in the rubber processing industry, but mechanical blending has many problems such as flying dust, uneven mixing, and high energy consumption. The emulsion co-coagulation method uniformly mixes the rubber emulsion and the filler suspension, and then completes the rubber-filler co-coagulation through demulsification, which can effectively solve many problems in mechanical blending, and is versatile and environmentally friendly. [0003] Compared with the dry blending process, the filler slurry and rubber emulsion co-coagulation process can effectively solve the problems of dust flying, uneven mixing, and high energy consumption for mixing. Therefore, the wet coacervation of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/06C08L7/00C08K13/06C08K9/06C08K3/34C08K3/22C08K5/09C08K3/06
CPCC08K3/06C08K3/22C08K3/346C08K5/09C08K9/06C08K13/06C08K2003/2296C08L9/06C08L7/00
Inventor 吉雷波张学法张士龙曹伟刘磊华振
Owner ZAOZHUANG SANXING ADVANCED MATERIALS