Waterborne silicone acrylate emulsion with core-shell structure and preparation method of waterborne silicone acrylate emulsion

A core-shell structure, water-based silicon technology, applied in antifouling/underwater coatings, coatings, paints containing biocides, etc., can solve problems such as hot stickiness, cold brittleness, water resistance, poor development and application, and poor heat resistance , to achieve the effects of improving moldability, lowering the minimum film forming temperature, and lowering the gel rate

Inactive Publication Date: 2017-10-03
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional acrylate emulsions have poor heat resistance, "hot sticky and cold brittle" and poor water resistance, which limit their further development and application

Method used

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  • Waterborne silicone acrylate emulsion with core-shell structure and preparation method of waterborne silicone acrylate emulsion
  • Waterborne silicone acrylate emulsion with core-shell structure and preparation method of waterborne silicone acrylate emulsion
  • Waterborne silicone acrylate emulsion with core-shell structure and preparation method of waterborne silicone acrylate emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of pre-emulsion: Add 48 parts by mass of deionized water and 1 part by mass of emulsifier into a four-neck flask, stir evenly, slowly add 12.5 parts by mass of MMA, 41.4 parts by mass of BA, and stir at high speed for 30 minutes to obtain the nucleus Pre-emulsion: Add 32 parts by mass of deionized water and 1 part by mass of emulsifier in another four-necked flask, stir evenly, slowly add 26 parts by mass of MMA, 14 parts by mass of BA, 2 parts by mass of AA, and stir at high speed for 30 minutes. Acquired shell pre-emulsion.

[0034] (2) Preparation of nuclear emulsion: In a four-neck flask equipped with a stirrer, a condenser, and a thermometer, 30 parts by mass of deionized water, 1 part by mass of emulsifier, and 0.5 parts by mass of buffer sodium bicarbonate were added under nitrogen protection. After stirring evenly, add 1.5 parts by mass of MMA, 4.6 parts by mass of BA, and an aqueous initiator solution, and gradually raise the temperature to 80°C...

Embodiment 2

[0044] (1) Preparation of pre-emulsion; Add 42 parts by mass of deionized water and 0.5 parts by mass of emulsifier in a four-necked flask, stir evenly, slowly add 12.5 parts by mass of MMA, 41.4 parts by mass of BA, stir at high speed for 30min, and obtain the nucleus Pre-emulsion: Add 28 parts by mass of deionized water and 0.5 parts by mass of emulsifier in another four-necked flask, stir evenly, slowly add 26 parts by mass of MMA, 14 parts by mass of BA, 3 parts by mass of AA, and stir at high speed for 30 minutes. Acquired shell pre-emulsion.

[0045] (2) Preparation of nuclear emulsion: In a four-necked flask equipped with a stirrer, a condenser, and a thermometer, 26.25 parts by mass of deionized water, 0.5 parts by mass of emulsifier, and 0.4 parts by mass of buffer sodium bicarbonate were added under nitrogen protection. After stirring evenly, add 1.5 parts by mass of MMA, 4.6 parts by mass of BA, and an aqueous initiator solution, and gradually raise the temperature ...

Embodiment 3

[0049] (1) Preparation of pre-emulsion; Add 45 parts by mass of deionized water and 0.8 parts by mass of emulsifier in a four-necked flask, stir evenly, slowly add 15.63 parts by mass of MMA, 34.5 parts by mass of BA, stir at high speed for 30min, and obtain the nucleus Pre-emulsion; in another four-necked flask, add 30 parts by mass of deionized water and 0.8 parts by mass of emulsifier, stir evenly, slowly add 32.5 parts by mass of MMA, 11.67 parts by mass of BA, 4 parts of AA, stir at high speed for 30min, and obtain Shell pre-emulsion.

[0050] (2) Preparation of nuclear emulsion: In a four-necked flask equipped with a stirrer, a condenser, and a thermometer, 28.13 parts by mass of deionized water, 0.8 parts by mass of emulsifier, and 0.4 parts by mass of buffer sodium bicarbonate were added under nitrogen protection. After stirring evenly, add 1.75 parts by mass of MMA, 3.83 parts by mass of BA, and an aqueous initiator solution, and gradually raise the temperature to 85°...

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Abstract

The invention discloses waterborne silicone acrylate emulsion with a core-shell structure and a preparation method of the waterborne silicone acrylate emulsion. The acrylate emulsion is prepared from the following components: methyl methacrylate, butyl acrylate, acrylic acid, an emulsifier, an initiator, organosilicon, ammonium hydroxide and deionized water. A semi-continuous seed emulsion polymerization method is combined with a starved condition feeding production process, and all monomers are added into a polymerization system at different stages, so organosilicone acrylate emulsion with the core-shell structure is prepared. The waterborne silicone acrylate emulsion disclosed by the invention has no toxin or pollution and the advantages of the organosilicon and an acrylate polymer; hardness, adhesive force, thermal stability, hydrophobicity, water resistance and other properties of an emulsion film are improved; the film forming property, water resistance and pollution resistance of the emulsion are improved, and minimum film forming temperature and other properties of the emulsion are reduced; the gel rate of emulsion polymerization is effectively reduced, and conversion rate and stability of the emulsion polymerization are improved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to the preparation and application of water-based coatings. Background technique [0002] With the promulgation of a series of environmental protection laws and regulations and people's increasing attention to environmental protection and physical health, traditional solvent-based coatings contain a large amount of organic volatiles, and a large amount of VOC volatilizes during curing, which is easy to pollute the environment. Therefore, its application It is gradually restricted, and the environment-friendly water-based paint uses water instead of organic solvents as the dispersion medium, which has little environmental pollution. It has received widespread attention in recent years and is gradually replacing traditional solvent-based paints. [0003] There are many kinds of water-based coatings on the market, including water-based polyurethane, water-based acrylate, water-b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/06C08F230/08C08F2/30C08F2/26C09D133/08C09D5/16
CPCC08F2/26C08F2/30C08F220/18C08F220/1804C09D5/1668C09D5/18C09D143/04C08F220/14C08F220/06C08F230/08
Inventor 邱祖民杨统林肖建军王海坤杨方麒柳露
Owner NANCHANG UNIV
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