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Chlorinated natural rubber paint added with modified graphite and preparation method thereof

A technology of chlorinated natural rubber and chlorinated rubber, which is applied in the direction of rubber derivative coatings and coatings, and can solve the problems of poor thermal stability of chlorinated rubber

Inactive Publication Date: 2011-11-23
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chlorinated rubber has poor thermal stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Take 200g of the prepared graphite oxide and disperse it in 4L of ethanol. After stirring evenly, add 100g of nonylamine, under mechanical stirring, react at 20 degrees for 12 hours, and then centrifuge. The resulting precipitate is washed repeatedly with ethanol, centrifuged again, and collected Obtain modified graphite.

[0009] Take pre-modified graphite (100g to 200g) and add it to 500ml xylene, and stir evenly. Another 2 kg of chlorinated rubber powder was dissolved in 10 L of toluene, xylene and butyl acetate mixed solvent. Finally, mix the dispersion of modified graphite, chlorinated rubber solution, 50% phenolic resin solution (1L to 1.5L) and chlorinated paraffin-42 (0.1 to 0.15kg), high shear dispersion (10000r / min) for 10min, Filter to get the finished paint. The performance tests of all coatings are tested in accordance with national standards. The test results show that the coating adhesion is grade 3, the impact strength is 50cm, the pencil hardness is ...

Embodiment 2

[0011] Take 200g of the prepared graphite oxide and disperse it in 4L of methanol, stir evenly, add 100g of laurylamine, under mechanical stirring, react at 20 degrees for 12 hours, then centrifuge, the obtained precipitate is washed repeatedly with ethanol, centrifuged again, and collected Obtain modified graphite.

[0012] Take pre-modified graphite (100g to 200g) and add it to 500ml xylene, and stir evenly. Another 2 kg of chlorinated rubber powder was dissolved in 10 L of toluene, xylene and butyl acetate mixed solvent. Finally, mix the dispersion of modified graphite, chlorinated rubber solution, 50% phenolic resin solution (1L to 1.5L) and chlorinated paraffin-42 (0.1 to 0.15kg), high shear dispersion (10000r / min) for 10min, Filter to get the finished paint. The performance tests of all coatings are tested in accordance with national standards. The test results show that the coating adhesion is grade 3, the impact strength is 50cm, the pencil hardness is 2H, and the c...

Embodiment 3

[0014] Get 200g of the prepared graphite oxide and disperse it in 4L of acetone, after stirring evenly, add 100g of p-n-butylaniline, under mechanical stirring, react at 20 degrees for 12 hours, then centrifuge, and the obtained precipitate is washed repeatedly with ethanol, and then Centrifuge to collect modified graphite.

[0015] Take pre-modified graphite (100g to 200g) and add it to 500ml xylene, and stir evenly. Another 2 kg of chlorinated rubber powder was dissolved in 10 L of toluene, xylene and butyl acetate mixed solvent. Finally, mix the dispersion of modified graphite, chlorinated rubber solution, 50% phenolic resin solution (1L to 1.5L) and chlorinated paraffin-42 (0.1 to 0.15kg), high shear dispersion (10000r / min) for 10min, Filter to get the finished paint. The performance tests of all coatings are tested in accordance with national standards. The test results show that the coating adhesion is grade 3, the impact strength is 50cm, the pencil hardness is 3H, a...

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Abstract

Chlorinated natural rubber paint added with modified graphite and a preparation method thereof. The preparation method comprises the following steps: adding modified graphite into xylene, uniformly stirring, dissolving chlorinated rubber powder into a mixed solvent of toluene, xylene, and acetic acid, mixing a dispersed liquid of the modified graphite, the chlorinated rubber solution, a phenolic resin liquid, and chlorinated paraffin, performing shearing dispersion, filtering to obtain the finished paint. Performance tests of all the paint of the invention are performed according to national standards. Test results show that the paint has third-class adhesion, has impact strength of 50 cm, pencil hardness of 2H to 3H, and paint flexibility of 1. In addition, the above chlorinated natural rubber paint and chlorinated natural rubber paint without modified graphite are heated at 150 DEG C for 20 min, and the results show that the amount of the escaped hydrogen chloride is reduced by 10-20%; the induction time for hydrogen chloride escape is prolonged by 5-10 min; and the amount of the formed covalent double bond is decreased by 5-10%.

Description

technical field [0001] The invention relates to a chlorinated natural rubber coating added with modified graphite and a preparation method thereof. Background technique [0002] Chlorinated natural rubber (CNR) is an important derivative of natural rubber, which is white or light yellow powder in appearance, and is widely used in paints, coatings, adhesives, inks, pigments and other fields. However, chlorinated rubber has poor thermal stability. Natural graphite is an inorganic material with good thermal stability and flame retardancy. If a certain amount of graphite can be added to the formula of chlorinated natural rubber coating, its thermal stability will be significantly improved. Due to the poor dispersion of natural graphite in chlorinated rubber, it must be surface modified. The present invention adopts the Hummers method to prepare graphite oxide, and controls its carbon element content to be 60% to 84%, and its oxygen element content to be 15% to 38%. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D115/02C09D161/06C09D7/12
Inventor 侯婷婷钟杰平廖双泉杨磊李思东何兰珍李颖
Owner GUANGDONG OCEAN UNIVERSITY
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