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Castaway phosphorus slag-natural rubber composite and preparation method thereof

A technology for natural rubber and composite materials, which is applied in the fields of waste phosphate slag-natural rubber composite materials and their preparation, and rubber composite materials and their preparation fields, can solve the problems that cadmium harms crops, endangers human health, harms plants and the like, and achieves The effect of solving environmental pollution, saving resources and reducing production costs

Inactive Publication Date: 2013-05-15
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

my country's annual output of phosphate slag is about 8 million tons. Except for a small amount of phosphate slag used in construction admixtures, there is no reasonable treatment method for phosphate slag. A large amount of phosphate slag is mainly accumulated in the factory area or cadmium is harmful to plant growth. Toxic elements, cadmium is harmful to crops. At low concentrations, although there are no obvious symptoms in appearance, it can endanger human health through the food chain.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 100 parts of natural rubber, add 25 parts of phosphate slag, 1.5 parts of bis-dioctyloxypyrophosphate ester ethylene titanate and triethanolamine chelate and 1.5 parts of ethylenediamine in the banbury mixer , and 3.5 parts of sulfur, 5.0 parts of zinc oxide, 0.5 parts of stearic acid, 1.5 parts of benzothiazole disulfide (accelerator DM), 0.5 parts of 2,6-ditertbutyl-4-methylphenol (anti-264) , 5 parts of general-purpose carbon black, 5 parts of paraffin motor oil, vulcanized at 150 ° C for 15 minutes after mixing evenly. The tensile strength of the vulcanized rubber sheet is 23.0MPa, the elongation at break is 770%, and the modulus stress at 300 is 3.2 MPa.

Embodiment 2

[0024] Weigh 50 parts of phosphate slag, add 100 parts of deionized water for swelling. Then add 2.5 parts of chelate compound of bis-dioctyloxypyrophosphate ester ethylene titanate and triethanolamine and 2.5 parts of ethylenediamine, react at 70° C. for 3.5 hours, and carry out dehydration and drying. Weigh 100 parts of natural rubber, add the above-mentioned phosphate slag into the open rubber mixer, and 3.5 parts of sulfur, 5.0 parts of zinc oxide, 0.5 parts of stearic acid, 1.5 parts of benzothiazole disulfide (accelerator DM), 0.5 parts 2,6-di-tert-butyl-4-methylphenol (anti-264), 5 parts of high wear-resistant carbon black, 6 parts of paraffin engine oil, knead evenly and vulcanize at 150°C for 15 minutes. The tensile strength of the vulcanized rubber sheet is 17.5 MPa, the elongation at break is 715%, and the modulus stress at 300 is 3.9 MPa.

Embodiment 3

[0026] Weigh 15 parts of phosphate slag, add 100 parts of deionized water for swelling. Then add 1.0 parts of bis-dioctyloxypyrophosphate ester ethylene titanate and triethanolamine chelate and 1.0 parts of ethylenediamine, and react at 70° C. for 3.5 hours. Weigh 167 parts of concentrated natural latex with a total solid content of 60%, and add 0.3 part of Pingping plus O to keep the latex stable. Then add the modified phosphate rock slag under stirring. Continue stirring for 3 hours to evenly disperse the phosphate slag in the natural rubber latex, use formic acid to coagulate, tablet, wash and dry, and then the phosphate slag composite material can be made;

[0027] Weigh 115 parts of the above-mentioned phosphate slag-natural rubber compounding material, add 3.5 parts of sulfur, 5.0 parts of zinc oxide, 0.5 parts of stearic acid, and 1.5 parts of benzothiazole disulfide (accelerator DM) in sequence on the open rubber mixer , 0.5 parts of 2,6-di-tert-butyl-4-methylphenol ...

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Abstract

The invention relates to a castaway phosphorus slag-natural rubber composite and a preparation method thereof. The composite comprises 100 parts of natural rubber, 10-50 parts of phosphorus slags, 0.5-2.5 parts of coupling agent, 0.5-3.0 parts of crosslinking agent, and certain machining aids. The preparation method is implemented through preparing phosphorus slags into modified phosphorus slags or phosphorus slag dispersions, or directly uniformly mixing the phosphorus slags, the natural rubber, the coupling agent, the crosslinking agent and other additives on a rubber mixing mill in a conventional mode, thereby preparing the phosphorus slag-natural rubber composite; or after modified phosphorus slag dispersions are uniformly mixed into epoxidized natural latex under the condition of constant stirring, further carrying out a series of conventional machining processes such as solidifying with ethanol or steam or water boiling, tabletting, washing and drying on the obtained product so as to obtain the composite. The composite is low in price, good in tear resistance, stretch resistance and wet-skid resistance, and less in possibility of generating heat, and can be used for solving the problem that castaway phosphorus slags pollute the environment, facilitating the protection of environmental resources, and saving resources.

Description

technical field [0001] The invention relates to a rubber composite material and a preparation method thereof, in particular to a waste phosphate slag-natural rubber composite material and a preparation method thereof, belonging to the technical field of rubber composite material production. Background technique [0002] During the processing of natural rubber, a certain amount of filler 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 costs . At present, the fillers widely used in the rubber industry mainly include carbon black, silica, fiber, clay, calcium carbonate, etc. Among them, fillers such as carbon black, white carbon black, and fiber have different degrees of reinforcing effect on rubber, but they are expensive and easy to generate heat. Inorganic fillers such as pottery clay and calcium carbonate hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L7/02C08K13/06C08K9/04C08K3/34C08K3/22C08K5/01C08K3/06C08K5/09C08K5/47C08K5/13C08K3/04
Inventor 曾宗强余和平刘宏超崔丽虹
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI