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Preparation method of organic silicone additive and application of organic silicone additive in water-based acrylic semi-gloss resin emulsion

A technology of organic silicon additives and water-based acrylic acid, which is applied in the field of chemical engineering, can solve the problems of affecting the matting effect, the precipitation and flocculation of matting agents, etc., and achieve the effect of simple post-processing, simplified production process, and reduced workload

Active Publication Date: 2017-06-30
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the field of water-based acrylic coatings, in order to obtain a certain degree of matte effect, various matting agents (such as fumed silica, wax emulsion, etc.) are generally dispersed in the resin through a high-speed dispersion process under the action of external additives. Therefore, the selection of additives, resin and dispersion process in this process must be well matched with the selected matting agent, otherwise it is easy to cause matting agent precipitation and flocculation, which will affect the matting effect

Method used

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  • Preparation method of organic silicone additive and application of organic silicone additive in water-based acrylic semi-gloss resin emulsion
  • Preparation method of organic silicone additive and application of organic silicone additive in water-based acrylic semi-gloss resin emulsion
  • Preparation method of organic silicone additive and application of organic silicone additive in water-based acrylic semi-gloss resin emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) In a 50ml three-neck flask equipped with a stirrer, a thermometer, a nitrogen pipe and a condensing reflux device, add 0.1g of 2,6-di-tert-butyl-p-cresol, 10ml of allyl methacrylate, and 30ul of platinum. 0.008g / ml chloroplatinic acid isopropanol solution, blow dry nitrogen, stir, heat up to 75°C, add 23ml 1,1,1,3,5,5,5-heptamethyltrisiloxane dropwise, 35min Drop left and right, cool down to room temperature, and filter through a 0.45um nylon filter membrane to obtain silicone additives. The conversion rate of 1,1,1,3,5,5,5-heptamethyltrisiloxane is 77.04%. .

[0034] (2) The polyacrylate emulsion is synthesized according to the formula shown in Table 1. The process is as follows: dissolve 3 / 5 of the emulsifier in deionized water, add all the monomers, and emulsify it into a uniform pre-emulsion under strong stirring . Add deionized water, sodium bicarbonate and the remaining emulsifier into a four-neck flask equipped with a stirrer, thermometer, condenser tube an...

Embodiment 2

[0043] (1) In a 50ml three-neck flask equipped with a stirrer, a thermometer, a nitrogen pipe and a condensing reflux device, add 0.1g of 2,6-di-tert-butyl-p-cresol, 10ml of allyl methacrylate, and 30ul of platinum. 0.008g / ml chloroplatinic acid isopropanol solution, blow dry nitrogen, stir, heat up to 85°C, add 23ml 1,1,1,3,5,5,5-heptamethyltrisiloxane dropwise, 35min Drop left and right, cool down to room temperature, and filter through a 0.22um nylon filter membrane to obtain silicone additives. The conversion rate of 1,1,1,3,5,5,5-heptamethyltrisiloxane is 81.77% .

[0044] (2) The polyacrylate emulsion is synthesized according to the formula shown in Table 1. The process is as follows: dissolve 3 / 5 of the emulsifier in deionized water, add all the monomers, and emulsify it into a uniform pre-emulsion under strong stirring . Add deionized water, sodium bicarbonate and the remaining emulsifier into a four-neck flask equipped with a stirrer, thermometer, condenser tube and...

Embodiment 3

[0046] (1) In a 50ml three-neck flask equipped with a stirrer, a thermometer, a nitrogen pipe and a condensing reflux device, add 0.1g of 2,6-di-tert-butyl-p-cresol, 10ml of allyl methacrylate, and 30ul of platinum. 0.008g / ml chloroplatinic acid isopropanol solution, blow dry nitrogen, stir, heat up to 85°C, add 20ml 1,1,1,3,5,5,5-heptamethyltrisiloxane dropwise, 35min Drop left and right, cool down to room temperature, and filter through a 0.22um nylon filter membrane to obtain silicone additives. The conversion rate of 1,1,1,3,5,5,5-heptamethyltrisiloxane is 81.94%. .

[0047] (2) The polyacrylate emulsion is synthesized according to the formula shown in Table 1. The process is as follows: dissolve 3 / 5 of the emulsifier in deionized water, add all the monomers, and emulsify it into a uniform pre-emulsion under strong stirring . Add deionized water, sodium bicarbonate and the remaining emulsifier into a four-neck flask equipped with a stirrer, thermometer, condenser tube an...

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Abstract

The invention provides a preparation method of an organic silicone additive and application of the organic silicone additive in water-based acrylic semi-gloss resin emulsion. The method comprises the following steps: uniformly stirring isopropanol chloroplatinate which is used as a catalyst, 2,6-ditertbutyl-4 methylphenol which is used as a polymerization inhibitor, and allyl methacrylate in absence of an solvent and under the dry inertia atmosphere; heating to reach the temperature of 65-105 DEG C; dropwise adding 1,1,1,3,5,5,5-heptamethyltrisiloxane at the rate of 0.5-1 ml / min; then carrying out a continuous reaction for 30-100min; decreasing the temperature to reach room temperature; filtering to obtain the organic silicone additive; the organic silicone additive is added to the preparation of water-based acrylic resin emulsion, and then the emulsion is uniformly coated on a base material to form a film, and finally the film is dried to obtain a water-based acrylic resin coated film. The method is carried out in the absence of the solvent, so that the environmental pollution is avoided; the after-treatment is simple; the production efficiency is high; with the adoption of the organic silicone additive, the surface glossiness and the surface free energy of the resin can be reduced; a delustering agent is saved, thus the production processes are simplified, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and relates to the preparation and application of organosilicon additives. Background technique [0002] With the continuous improvement of people's living standards, people have more and more sensory requirements for the appearance of coatings. The high-gloss glossy paint is more reflective after film formation, which produces a strong sense of stimulation visually. In order to meet people's visual needs, paints with different gloss are required. Matt paint has a soft luster, gives people a comfortable and elegant feeling, is scratch-resistant, and has a strong texture. It is widely used in construction, furniture, household appliances and interior decoration. [0003] In the field of water-based acrylic coatings, in order to obtain a certain degree of matte effect, various matting agents (such as fumed silica, wax emulsion, etc.) are generally dispersed in the resin through a high...

Claims

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Application Information

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IPC IPC(8): C09D7/12C09D133/12C07F7/08
CPCC07F7/0838C08K5/5425C09D7/63C09D133/12
Inventor 邱祖民肖建军杨统林王海坤周飞付翔王方朝
Owner NANCHANG UNIV
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