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Method for preparing silicon-fluorine modified acrylic ester emulsion based on macromolecule organic silicon and fluorine-containing monomer

A technology of acrylate and silicone, which is applied in the field of preparing silicon-fluorine modified acrylate emulsion, which can solve the problems of design control, no molecular chain and latex particle type, etc., and achieve the effect of convenient operation, low cost and simple equipment

Inactive Publication Date: 2008-01-09
湖北天鹅涂料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] A domestic patent on fluorosilicon-modified acrylate: a fluorosilicon-modified acrylate emulsion for super weather-resistant and anti-fouling coatings (patent publication number: CN1772777A; applicant: Guangzhou Chemical Industry Research Institute), The silicone used in this patent is a small molecule silicone, and the patent does not control the design of the molecular chain and the type of latex particles

Method used

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  • Method for preparing silicon-fluorine modified acrylic ester emulsion based on macromolecule organic silicon and fluorine-containing monomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] ①Preparation of base liquid A: Add 35.0 parts of deionized water, 0.5 parts of sodium dodecylbenzenesulfonate, 0.5 parts of polyoxyethylene alkyl Phenyl ether. .

[0035] ②Pre-emulsion B: Add 21.0 parts of methyl methacrylate, 21.0 parts of n-butyl acrylate main monomer, 0.5 parts of sodium dodecylbenzenesulfonate, and 1.0 parts of polyoxyethylene alkylphenyl ether to 43.0 parts part deionized water, stirred and emulsified for 20 minutes;

[0036] ③When the temperature of the water bath reaches 83±2°C, add 0.20 parts of ammonium persulfate to A, and take half of B and add it dropwise to the base liquid A to obtain the core layer emulsion C. Add 7.0 parts of hydroxyl silicone oil and 5.0 parts of trifluoroethyl methacrylate to the remaining half of B, and continue to stir and emulsify to obtain pre-emulsion D; after the core layer is polymerized, add D dropwise to C to complete the verification reaction ;

[0037]④Add 1.0 parts of vinyltriethoxysilane coupling agent ...

Embodiment 2

[0040] ①Preparation of base liquid A: Add 40.0 parts of deionized water, 0.7 parts of dialkyl sodium succinate, 0.7 parts of polyoxyethylene dodecyl to the reactor with agitator, condenser and dropping device ether.

[0041] ②Pre-emulsion B: Add 18.0 parts of methyl methacrylate, 27.0 parts of octyl acrylate, 0.7 parts of sodium dialkyl succinate, and 1.4 parts of polyoxyethylene lauryl ether into 45.0 parts of deionized water, and stir Emulsify for 20 minutes;

[0042] ③When the temperature of the water bath reaches 58±2°C, add 0.05 parts of hydrogen peroxide and 0.05 parts of ferrous chloride to A, and take half of B and add it dropwise to base liquid A to obtain core layer emulsion C. Add 5.0 parts of hydroxyl silicone oil and 5.0 parts of dodecafluoroheptyl acrylate to the remaining half of B, and continue to stir and emulsify to obtain pre-emulsion D; after the core layer is polymerized, add D dropwise to C to complete the review reaction;

[0043] ④Add 1.0 parts of vin...

Embodiment 3

[0046] ①Preparation of base liquid A: Add 40.0 parts of deionized water, 0.3 parts of sodium dodecylbenzenesulfonate, 0.3 parts of polyoxyethylene sorbose to the reactor with agitator, condenser and dropping device Alcohol octanoate.

[0047] ②Pre-emulsion B: Add 18.0 parts of methyl methacrylate, 27.0 parts of octyl acrylate, 0.7 parts of sodium dodecylbenzenesulfonate, and 1.4 parts of polyoxyethylene sorbitol caprylate to 45.0 parts of deionized In water, stir and emulsify for 20 minutes;

[0048] ③When the temperature of the water bath reaches 37±2°C, add 0.05 parts of sodium persulfate and 0.15 parts of cuprous chloride to A, and take half of B and add it dropwise to the base liquid A to obtain the core layer emulsion C. Add 5.0 parts of hydroxyl silicone oil and 5.0 parts of dodecafluoroheptyl acrylate to the remaining half of B, and continue to stir and emulsify to obtain pre-emulsion D; after the core layer is polymerized, add D dropwise to C to complete the review re...

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Abstract

Preparation of fluorine modified acrylic ester emulsion containing fluorine monomer and based on large molecule is carried out by taking acrylic ester as main monomer, taking large molecule organic silicon and fluorine-contained monomer as functional monomer, taking hydrolytic silicyl vinyl unsaturated silane as coupling cross-linking agent, taking anion and non-ionic emulsion as emulsifying system, taking aqueous evocating agent or oxidation reducing evocating system as evocating agent, regulating by pH regulator, and semi-continuous dripping to obtain final product. The emulsion storage stability is not less than 14 months, actual determination solid content is 35-50%, conversion rate is 93-99%, contact angle to water reaches to 118.3 degree, minimum surface energy is 11.7 mJ / m2 and water absorptive rate is 2.3-7.5%. It has excellent polymer system stability, low surface energy and better water resistance.

Description

technical field [0001] The invention relates to a preparation technology of acrylate emulsion with special performance, specifically refers to a technology of preparing silicon-fluorine modified acrylate emulsion by using macromolecular organosilicon and fluorine-containing monomer. Background technique [0002] Acrylate polymers have the advantages of excellent light resistance, weather resistance, corrosion resistance, good film-forming properties, and good film gloss, and the source of acrylate monomer raw materials is abundant and the cost of raw materials is low. Acrylate is used as an excellent film-forming substance and is widely used in construction, textile, printing, adhesives and other fields. However, acrylate coatings also have some disadvantages, such as poor water resistance, poor stain resistance, easy to become brittle at low temperature, and low-temperature viscous strength, which limits its application in some occasions. [0003] The more effective way to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/10C08F2/24C08F8/00C08F2/38
Inventor 管蓉丁晓峰黄宏志熊娉婷鲁德平陈沛智
Owner 湖北天鹅涂料股份有限公司
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