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A method of hydrogenated silicone oil modified nano silicon dioxide

A technology of nano-silica and hydrogenated silicone oil, which is applied in the treatment of dyed organic silicon compounds, fibrous fillers, coatings, etc., to achieve the effects of inhibiting agglomeration, improving stability, and low surface tension

Active Publication Date: 2017-12-08
JIANGSU RONGCHANG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This work mainly solves the following problems: (1) Selection of nano-silica sol, hydrogenated silicone oil, and catalyst, involving nanoparticle content, pH value, particle size, degree of polymerization of hydrogenated silicone oil, hydrogen content, catalyst concentration, and reaction time , temperature and other parameters, through the conditional test to sieve the appropriate formula to prepare stable hydrogenated silicone oil modified nano-silica; (2) through the adjustment of the molecular weight and dosage of hydrogenated silicone oil, the reaction degree of Si-OH on the surface of nanoparticles is controlled, and the preparation Modified nano-silica with rheological control properties; (3) Research on the application of hydrogenated silicone oil modified nano-silica in water-based coatings, its application in water-based coatings viscosity control, coating gloss, haze, hardness, weather resistance, Pollution resistance, corrosion resistance and other properties have been significantly improved

Method used

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  • A method of hydrogenated silicone oil modified nano silicon dioxide
  • A method of hydrogenated silicone oil modified nano silicon dioxide
  • A method of hydrogenated silicone oil modified nano silicon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The formula and processing technology are as follows:

[0016] Add 90Kg of nano-silica sol to be treated and 0.05Kg of water-soluble metal salt stannous sulfate into a sealed kettle with a stirring and heating device, start stirring, add 0.05Kg of triethanolamine pH regulator to adjust pH = 5, and uniformly 5 Kg of hydrogenated silicon oil with a hydrogen content of 0.8% was added dropwise, stirred for 8 hours after the addition, then cooled and filtered to obtain hydrogenated silicon oil-modified nano silicon dioxide. The hydrogenated silicone oil-modified nano-silica can be used as a rheology modifier for water-based coatings. The addition amount is 1%, the high-shear viscosity of the coating is obviously increased, the fluidity is improved under low shear, and it has good splash resistance. Leveling; at the same time, the surface hydrophobicity, stain resistance, weather resistance and corrosion resistance have all been significantly improved.

Embodiment 2

[0018] The formula and processing technology are as follows:

[0019] Add 60Kg of nano-silica sol to be treated and 0.02Kg of water-soluble metal salt cobalt naphthenate in a sealed kettle with a stirring and heating device, start stirring, drop into 0.15Kg NN-dimethylethanolamine pH regulator to adjust pH=6, and At 50°C, 6Kg of hydrogenated silicone oil with a hydrogen content of 0.6% was evenly added dropwise, stirred for 6 hours after the addition, then cooled and filtered to obtain hydrogenated silicone oil-modified nano-silica. The hydrogenated silicone oil-modified nano-silica can be used as a rheology modifier for water-based coatings. The addition amount is 1%, the high-shear viscosity of the coating is obviously increased, the fluidity is improved under low shear, and it has good splash resistance. Leveling; at the same time, the surface hydrophobicity, stain resistance, weather resistance and corrosion resistance have all been significantly improved.

Embodiment 3

[0021] The formula and processing technology are as follows:

[0022] Add 70Kg of nano-silica sol to be treated and 0.1Kg of water-soluble metal salt cobalt octanoate into a sealed kettle with a stirring and heating device, start stirring, add 0.2Kg diethanolamine and 0.05Kg phosphoric acid to adjust pH = 6, and drop evenly at 50°C Add 8Kg of hydrogenated silicon oil with a hydrogen content of 0.8%, stir for 6 hours after the addition, then cool and filter to obtain hydrogenated silicon oil-modified nano silicon dioxide. The hydrogenated silicone oil-modified nano-silica can be used as a rheology modifier for water-based coatings. The addition amount is 1%, the high-shear viscosity of the coating is obviously increased, the fluidity is improved under low shear, and it has good splash resistance. Leveling; at the same time, the surface hydrophobicity, stain resistance, weather resistance and corrosion resistance have all been significantly improved.

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Abstract

The invention relates to a method for modifying nano-silica with hydrogenated silicone oil. A water-soluble metal salt catalyst is used to catalyze the reaction between hydrogenated silicone oil Si-H and nano-silica Si-OH. A certain amount of hydrophobic groups have been grafted to form a structure in which hydrophobic segments surround hydrophilic functional groups. It shows completely different rheological properties at low shear and high shear rates, as well as excellent physical and chemical properties. A small amount of added , can effectively reduce the surface tension, control the rheological properties of water-based coatings, have special rheological control properties and various surface effects in the coatings, and solve the construction difficulties and poor surface effects caused by high surface tension and thixotropy of water-based coatings , The technical problem of poor anti-corrosion performance has good application prospects in high-performance water-based automotive coatings, water-based industrial anti-corrosion coatings, water-based architectural coatings, water-based inks and other fields.

Description

technical field [0001] The invention relates to a method for modifying nano silicon dioxide with hydrogenated silicone oil. Background technique [0002] Nanoparticles have small size effects, surface effects, volume effects, and macroscopic quantum tunneling effects, and have been widely used in the field of new materials in recent years. Add nano-materials to the coating to form a nano-composite coating, which can thicken and prevent sedimentation, fill structural micropores, etc., and can improve the impact resistance, adhesion, stain resistance, corrosion resistance, and aging resistance of the coating. And many other properties, this technology has been very mature in solvent-based coatings. However, in the water-based coating system, the surface of the nanoparticles strongly adsorbs water, forming more hydroxyl groups, which increases the surface free energy of the nanoparticles, and the formation of hydrogen bonds between the hydroxyl groups makes the nanoparticles a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/28C09C3/12C09D7/12
Inventor 郭其鹏钟涛刘福春常春陈均周铭曹继兵
Owner JIANGSU RONGCHANG NEW MATERIAL TECH
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