Nanometer filler for abrasion-resistant coatings and method for preparing nanometer filler

A kind of wear-resistant coating and nanotechnology, applied in the direction of coating, etc., can solve the problems of poor toughness and other problems, and achieve the effect of solving the problem of organic-inorganic phase interface fusion, preventing agglomeration, and improving toughness and compactness

Active Publication Date: 2016-12-07
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can significantly improve the heat resistance and chemical stability of polyurethane elastomers, but this method cannot improve the problem of poor toughness caused by the introduction of rigid ions

Method used

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  • Nanometer filler for abrasion-resistant coatings and method for preparing nanometer filler
  • Nanometer filler for abrasion-resistant coatings and method for preparing nanometer filler
  • Nanometer filler for abrasion-resistant coatings and method for preparing nanometer filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Put 100g of dry nano-silica with 30% surface hydroxyl content, 30g of anhydrous hexamethylene diisocyanate dimer, and 1000ml of anhydrous toluene in a dry flask, extract the gas in the flask and fill it with N 2 As a protective gas, the reaction is complete after stirring at room temperature for 10 minutes at high speed, and then 80g of anhydrous epoxy resin in toluene solution is dropped into the flask at a rate of 30 drops / min at 30°C, and the temperature rises to Re-reaction at 150°C, the reaction time is 15h, and after the reaction is completed, repeated centrifugal washing with anhydrous toluene to remove unreacted hexamethylene diisocyanate trimer and epoxy resin, suction filtration and drying to obtain surface grafting Epoxy nano silica.

[0041] Place 100g of nano-silica grafted with epoxy resin on the surface and 500ml of anhydrous toluene in a dry three-necked flask, and then drop 80g of ethanolamine into the three-necked flask at a rate of 30 drops / min under magn...

Embodiment 2

[0044] Put 100g of dry nano-silica with a surface hydroxyl content of 40%, 40g of anhydrous hexamethylene diisocyanate trimer, and 500ml of anhydrous xylene in a dry flask, and then fill the flask with N 2 As a protective gas, the reaction is complete after stirring at room temperature for 30 minutes at high speed, and then 100 g of anhydrous epoxy resin in xylene solution is dropped into the flask at a rate of 10 drops / min at 60°C, and the temperature rises after dropping Re-react at 100°C. The reaction time is 24h. After the reaction is completed, it is washed repeatedly with anhydrous xylene to remove the unreacted hexamethylene diisocyanate trimer and epoxy resin. The surface is obtained by suction filtration and drying. Nano silica grafted with epoxy resin.

[0045] Put 100g of nano-silica grafted with epoxy resin on the surface and 500ml of anhydrous xylene in a dry three-necked flask, and then under the action of magnetic stirring at room temperature, 100g of n-butylamine a...

Embodiment 3

[0048] Put 100g of dry nano-silica with 60% surface hydroxyl content, 50g of anhydrous hexamethylene diisocyanate trimer, and 500ml of anhydrous toluene in a dry flask, and then fill the flask with N 2 As a protective gas, the reaction was completed after stirring at room temperature for 20 minutes at high speed, and then 150g of anhydrous epoxy resin in toluene solution was dropped into the flask at a rate of 60 drops / min at 30°C, and the temperature rose to Re-reaction at 200°C, the reaction time is 8 hours, and after the reaction is completed, repeated centrifugal washing with anhydrous acetone to remove unreacted hexamethylene diisocyanate trimer and epoxy resin, suction filtration and drying to obtain surface grafting Epoxy nano silica.

[0049] Place 100g of nano-silica grafted with epoxy resin on the surface and 500ml of anhydrous toluene in a dry three-necked flask, and then drop 50g of triethylamine at a rate of 60 drops / min at 90°C under magnetic stirring. Put it into a...

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Abstract

The invention belongs to the technical field of functional materials, and particularly relates to a nanometer filler for abrasion-resistant coatings and a method for preparing the nanometer filler. The nanometer filler for the abrasion-resistant coatings comprises nanometer silicon dioxide, isocyanate, epoxy resin, solvents and alkaline amine substances. A molar ratio of the nanometer silicon dioxide to the isocyanate to the epoxy resin is 1:1.5-3:1.5-3. The nanometer filler and the method have the advantages that epoxy resin molecules are led into the surfaces of the nanometer silicon dioxide by the aid of the isocyanate, so that nanometer silicon dioxide with epoxy resin grafted surfaces can be obtained; epoxy groups of the epoxy resin molecules are subjected to ring opening by the aid of alkaline ring opening reaction of the epoxy groups, so that hydroxyl capable of participating in crosslinking and solidifying can be formed, and modified nanometer silicon dioxide with hydroxyl flexible chain segment grafted surfaces can be ultimately obtained; the modified nanometer silicon dioxide can be directly added into the abrasion-resistant coatings for high-speed trains, accordingly, the toughness and the compactness of the coatings can be improved, and the water absorption of the coatings can be reduced.

Description

Technical field [0001] The invention belongs to the technical field of functional materials, and specifically relates to a nano wear-resistant coating filler and a preparation method thereof. Background technique [0002] A large number of studies at home and abroad have shown that the addition of nanoparticles can greatly improve the toughness, strength, and ductility of the material, so the mechanical properties of the material can be significantly improved when the filling amount is small. However, due to the small particle size, large specific surface area, and high surface energy of inorganic nano fillers, surface atoms have high activity, are extremely unstable, and are easy to combine with other atoms, causing the nanoparticles to attract each other and cause agglomeration. The surface energy difference between the organic resin and the organic resin is large, and the compatibility between the two is not good, causing each other to be incompatible with each other, and it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12
CPCC08K3/36C08K9/08C08K2201/011C09D7/62
Inventor 孙琳林化强林鹏邓小军
Owner CRRC QINGDAO SIFANG CO LTD
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