Preparation method of high-transparency low-oil-absorption-number matting powder

A technology of matting powder and oil absorption value, applied in chemical instruments and methods, dyeing low molecular organic compound treatment, dyeing high molecular organic compound treatment and other directions, can solve the problems of poor matting effect, high oil absorption value, poor dispersibility, etc. Effects of increased density, gloss and transparency, good suspension properties

Active Publication Date: 2015-04-22
广东海顺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It contains resin and curing agent to shorten the gelation time, but its product will form large voids when it is applied, with high oil absorption value and poor dispersion
At the same time, the density of the product is relatively high, and the extinction effect is poor

Method used

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  • Preparation method of high-transparency low-oil-absorption-number matting powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 3000kg of water glass into the reaction kettle, start stirring, start adding hydrofluoric acid, stop adding acid after the gel is formed, immediately raise the temperature to 48°C, add acid again to adjust the pH value to 4, and stir for 60 minutes.

[0021] 500 kg of polytetrafluoroethylene wax emulsion was added thereto, 40 kg of silane and aluminate were added to carry out surface modification, and the reaction was carried out for 65 minutes.

[0022] Raise the temperature to 58°C, add 50kg of water-soluble acrylic acid grafted with siloxane, and at the same time add 50kg of ethanol, and keep it warm for 1.5 hours to make it second coating.

[0023] Wash the slurry with water and press filter to reduce the conductivity to below 300μs / cm. Spray dried and then pulverized to a particle size of 4 μm.

Embodiment 2

[0025] Add 3000kg of water glass into the reaction kettle, start stirring, start adding phosphoric acid, stop adding acid after the gel is formed, immediately raise the temperature to 52°C, add acid again to adjust the pH value to 5, and stir for 60 minutes.

[0026] Add 400kg of fluorine-containing silane coupling agent therein, add 50kg each of polyethylene wax emulsion and titanate to carry out surface modification, and react for 90 minutes.

[0027] Raise the temperature to 84°C, add 35kg of linear siloxane, and add 70kg of ethanol at the same time, and react for 2.5 hours to make it secondly coated.

[0028] Wash the slurry with water and press filter to reduce the conductivity to below 300μs / cm. Spray dried and then pulverized to a particle size of 6 μm.

Embodiment 3

[0030] Add 3000kg of water glass into the reaction kettle, start stirring, start adding sulfuric acid, stop adding acid after the gel is formed, immediately raise the temperature to 50°C, add acid again to adjust the pH value to 4.5, and stir for 60 minutes.

[0031] Add 1000 kg of fluorine-containing cyclic silane therein, add 25 kg each of silane and titanate to carry out surface modification, and react for 1 hour.

[0032] Raise the temperature to 68°C, add 30kg of water-soluble polyurethane grafted with siloxane, 40kg of linear siloxane, and at the same time add 50kg of ethanol, and react for 2 hours to make it second coating.

[0033] Wash the slurry with water and press filter to reduce the conductivity to below 300μs / cm. Spray dried and then pulverized to a particle size of 5 μm.

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Abstract

The invention relates to a preparation method of high-transparency low-oil-absorption-number matting powder. The preparation method comprises the following steps: acidifying, fluoridizing, double coating, water washing, pressure filtration, drying and pulverization. After the fluorine-containing organic matter is added, the product can not easily spill in the use process; and the gap of the silicon dioxide is filled with the fluorine-containing organic matter to lower the oil absorption number. The crosslinkable long-chain organic matter, which can perform crosslinking reaction with silicon dioxide, is added and grafted to the silicon dioxide surface, and the wax is recoated and sealed, thereby further lowering the oil absorption number.

Description

technical field [0001] The invention belongs to the field of matting powder production, and in particular relates to a preparation method of a high transparency and low oil absorption value matting powder. Background technique [0002] Matting powder can be divided into oily matting powder and water-based matting powder. Widely used in latex paint, interior and exterior wall paint, leather paint, alkyd resin paint and polyester paint and other paint systems. In the application of coatings and paints, it can control the surface gloss of the coating film in a balanced manner, prevent the sedimentation of pigments and fillers, improve the feel of the paint film, increase the wear resistance and scratch resistance of the coating film, dehumidify, deodorize, and purify the air , Sound insulation, waterproof and heat insulation, permeability. [0003] In recent years, my country's coatings industry is in the ascendant, and the total output of coatings has also leapt to the foref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/08C09C3/10C09C3/12C09C3/04C09C3/06C09D7/12
Inventor 付少辉易承志张振东
Owner 广东海顺新材料科技有限公司
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