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Modified acrylic resin for weather-resistant coating and preparation method for same

A technology of acrylic resin and acrylic resin, applied in the direction of coating, etc., can solve the problems of environmental pollution, limited application, increased cost, etc., and achieve the effect of less equipment investment, increased utilization rate, and strong adhesion

Inactive Publication Date: 2013-07-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this method uses an organic solvent as a reaction solvent, it not only increases the cost, but also pollutes the environment, which limits its further application.

Method used

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  • Modified acrylic resin for weather-resistant coating and preparation method for same
  • Modified acrylic resin for weather-resistant coating and preparation method for same
  • Modified acrylic resin for weather-resistant coating and preparation method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Step 1) Dissolve 1g of alkylphenol polyoxyethylene ether, 1g of sodium lauryl sulfate, 0.3g of dodecylbenzenesulfonic acid, and 0.1g of sodium bicarbonate in 70g of water, and add it to a place equipped with a stirrer, a thermometer, Condenser, drop into the reactor of the device, stir and dissolve to form an emulsion;

[0047] Step 2) Nitrogen protection, raise the temperature to 90°C, add 2g of methacryloxypropyltrimethoxysilane, 2g of hydroxyethyl methacrylate, and 5g of octamethylcyclotetrasilicon to the reactor dropwise The mixed solution of oxane is incubated for 1h after the dropwise addition to obtain a silicone resin emulsion;

[0048] Step 3) When the temperature drops to 80°C, weigh 3g of acrylic acid, 12g of methyl methacrylate, and 10g of butyl acrylate to mix, and add 1 / 3 of the total amount to the silicone resin emulsion obtained in step 2), and place the rest In the dripping device;

[0049] Step 4) Dissolve 0.3g of ammonium persulfate in 5mL of water,...

Embodiment 2

[0055] Step 1) Dissolve 1.25g alkylphenol polyoxyethylene ether, 1.25g sodium dodecylsulfonate, 0.5g dodecylbenzenesulfonic acid, 0.25g sodium bicarbonate in 85g water, add to the , a thermometer, a condenser tube, and dropwise into the reaction vessel of the device, stirring and dissolving to form an emulsion.

[0056] Step 2) Nitrogen protection, raise the temperature to 70°C, add dropwise a mixture of 3g vinyltrimethoxysilane, 3g hydroxyethyl methacrylate, and 8g octamethylcyclotetrasiloxane into the reaction vessel , keep warm for 3h after the dropwise addition, to obtain a silicone resin emulsion;

[0057] Step 3) Adjust the temperature to 80°C, weigh 2g of acrylic acid, 15g of methyl methacrylate, and 13g of butyl acrylate to mix, and add 1 / 3 of the total amount to the silicone resin emulsion obtained in step 2), and place the rest in In the dripping device;

[0058] Step 4) Dissolve 0.5g of sodium persulfate in 8mL of water, add 1 / 5 of the aqueous solution of sodium p...

Embodiment 3

[0061] Step 1) Dissolve 1.5g alkylphenol polyoxyethylene ether, 1.5g sodium dodecylbenzenesulfonate, 0.7g dodecylbenzenesulfonic acid, 0.4g potassium bicarbonate in 100g water, add to a stirring Device, thermometer, and condenser are added dropwise to the reaction vessel of the device, stirred and dissolved to form an emulsion.

[0062] Step 2) Nitrogen protection, raise the temperature to 80°C, add dropwise a mixture of 4g vinyltriethoxysilane, 4g hydroxypropyl methacrylate, and 11g vinylcyclotetrasiloxane into the reactor, After the dropwise addition, the mixture was incubated for 1 hour to obtain a silicone resin emulsion.

[0063] Step 3) When the temperature drops to 80°C, weigh 2g of acrylic acid, 13g of methyl methacrylate, and 20g of butyl acrylate to mix, and add 1 / 3 of the total amount to the silicone resin emulsion obtained in step 2), and place the rest In the dripping device;

[0064] Step 4) Dissolve 0.7g ammonium persulfate in 5mL water, add 1 / 5 ammonium persu...

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Abstract

The invention discloses modified acrylic resin for a weather-resistant coating and a preparation method for the same. Fluorine atoms and silicon atoms are introduced in acrylic resin simultaneously, thus improving the comprehensive performances of water resistance, pollution resistance, solvent resistance, weather resistance and the like, making up the defects of silicon resin, fluorine resin and acrylic resin used as coatings independently, and completely enabling the modified resin to be used as a protective coating applied to reinforced concrete and building external walls in the conditions of the atrocious weathers of exposure, cold wave, acid, alkali, salt and the like. The preparation method disclosed by the invention is simple in process, low in equipment requirement and abundant and easily available in raw materials, and has no need of pre-emulsification or a high-speed shearing machine; and because silicon resin is synthesised at first, the gels caused by the hydrolysis of a silane coupling agent can be effectively suppressed, the reaction conversion rate is high, the amount of the gels is low, the emulsion stability is good, and the reaction process is easy to control. The preparation method is especially suitable for industrialized production.

Description

technical field [0001] The invention belongs to the field of polymer synthesis, and relates to a fluorine-silicon composite modified acrylate emulsion and a preparation method thereof. Background technique [0002] Because acrylic resin has the advantages of light color, color retention, gloss retention, weather resistance and corrosion resistance, it has been widely used in the coating of automobiles, aircrafts, machinery, electronics, furniture, construction, leather, paper, industrial plastics and daily necessities. With the development of petrochemical technology, the price of acrylic acid and its ester monomers has dropped significantly, which has further promoted the development and application of acrylic resin coatings. In recent years, acrylic resin coatings have developed rapidly and currently account for more than 1 / 3 of coatings. Therefore, acrylic resins play an important role in coating film-forming resins. However, its stain resistance, water resistance, cold ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/12C08F220/14C08F220/18C08F220/06C08F220/22C09D151/08
Inventor 黄凯刘玉龙傅淑霞
Owner SOUTHEAST UNIV
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