(Methyl) acrylic resin with high organic silicon content and preparation method thereof

A technology with acrylic resin and silicon content, applied in the direction of coating, etc., can solve the problems of unsustainable modification effect, poor compatibility, disappearance, etc., and achieve improved water resistance, improved stain resistance, and good elongation at break The effect of rate and tensile strength

Active Publication Date: 2013-05-08
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silicone resin has poor compatibility with other resins, so the modified effect cannot last long. After a long time of use, the silicone component will slowly disappear from the surface of the film.

Method used

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  • (Methyl) acrylic resin with high organic silicon content and preparation method thereof
  • (Methyl) acrylic resin with high organic silicon content and preparation method thereof
  • (Methyl) acrylic resin with high organic silicon content and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Add 80g of deionized water, 3g of dodecylbenzenesulfonic acid (DBSA), 2g of alkylphenol polyoxyethylene ether into a four-neck flask equipped with a stirrer, thermometer, condenser tube and nitrogen gas inlet tube (NP-9), 10.4g of octamethylcyclotetrasiloxane, blowing nitrogen, reacting at 70°C for 9h, then adding 2.5g of γ-methacryloxypropyltrimethoxysilane (KH-570), React at 75°C for 9 hours to obtain a long-chain siloxyvinyl siloxane emulsion, take it out and cool it to room temperature, then add the obtained emulsion dropwise to ethanol, break the emulsion by ultrasonic vibration, and pour off the supernatant to obtain a long-chain siloxane Vinyl siloxane.

[0028] (2) Add 3.1g of isobutyl methacrylate, 9.4g of isooctyl methacrylate, 4.5g of the long Chain siloxyvinyl siloxane, 28g methyl ethyl ketone, 0.4g azobisisobutylcyanide, blow nitrogen, react at 60°C for 6h, and then air-cool the material to obtain a (meth)acrylic resin with high organosilicon content ...

Embodiment 2

[0035] (1) Add 110g of deionized water, 4g of dodecylbenzenesulfonic acid (DBSA), 2g of alkylphenol polyoxyethylene ether into a four-neck flask equipped with a stirrer, thermometer, condenser tube and nitrogen gas inlet tube (NP-9), 25.4g of octamethylcyclotetrasiloxane, blowing nitrogen, reacting at 75°C for 7h, then adding 4.5g of vinyltrimethoxysilane, reacting at 80°C for 7h, to obtain long-chain siloxane Base vinyl siloxane emulsion, take it out and cool it to room temperature, then add the obtained emulsion dropwise into ethanol, ultrasonically vibrate to break the emulsification, pour off the supernatant, and obtain long-chain siloxy vinyl siloxane.

[0036] (2) Add 10.4g of methyl methacrylate, 30.9g of butyl acrylate, and 20.5g of the long-chain siloxyl group obtained in step (1) into a reaction vessel equipped with a stirrer, a thermometer, a condenser tube and a nitrogen gas inlet tube. Vinyl siloxane, 79g methyl ethyl ketone, 1.6g azobisisobutyrocyanide, blowing n...

Embodiment 3

[0043] (1) Add 120g of deionized water, 4g of dodecylbenzenesulfonic acid (DBSA), 2g of alkylphenol polyoxyethylene ether to a four-neck flask equipped with a stirrer, thermometer, condenser tube and nitrogen gas inlet tube (NP-9), 30.4g of octamethylcyclotetrasiloxane, blow nitrogen, react at 80°C for 5h, then add 5.3g of vinyltriethoxysilane, react at 85°C for 5h, to obtain long-chain siloxane Base vinyl siloxane emulsion, take it out and cool it to room temperature, then add the obtained emulsion dropwise into ethanol, ultrasonically vibrate to break the emulsification, pour off the supernatant, and obtain long-chain siloxy vinyl siloxane.

[0044](2) Add 16.2g of methyl acrylate, 26.6g of ethyl acrylate, and 30.5g of the long-chain siloxy vinyl obtained in step (1) into a reaction vessel equipped with a stirrer, a thermometer, a condenser tube and a nitrogen gas inlet tube Siloxane, 92g methyl ethyl ketone, 2.4g azobisisobutyrocyanide, blowing nitrogen, reacting at 68°C fo...

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Abstract

The invention discloses (methyl) acrylic resin with high organic silicon content and a preparation method thereof. The preparation method of the (methyl) acrylic resin comprises the following steps of: enabling octamethylcyclotetrasiloxane, an anionic emulsifier, a non-ionic emulsifier and water to react for 3 hours to 9 hours at 70 DEG C to 90 DEG C; adding siloxane containing unsaturated double bond to react for 3 hours to 9 hours at 75 DEG C to 90 DEG C; breaking the emulsion by alcohol to obtain long-chain siloxy vinyl siloxane; and enabling the obtained long-chain siloxy vinyl siloxane, (methyl) acrylic resin monomer, non-reactive organic solvent and initiator to react at 60 DEG C to 75 DEG C to obtain the (methyl) acrylic resin with high organic silicon content. The resin is introduced with the long-chain siloxy vinyl siloxane, so the resin has good water resistance; and the appropriate (methyl) acrylic resin monomer is selected, so that the elongation at break and tensile strength of a film which is coated with the (methyl) acrylic resin are increased.

Description

technical field [0001] The invention relates to a (meth)acrylic resin with high organic silicon content and a preparation method thereof. Background technique [0002] Coatings with (meth)acrylic acid and its ester copolymers as the main film-forming substances are collectively referred to as acrylic coatings. Acrylic paint has light color, plump film and good mechanical strength, and has become an important type of paint. However, it also has disadvantages such as poor water resistance, brittleness at low temperature, and insufficient weather resistance, which affect its practical effect. Polysiloxane just has good water resistance, weather resistance, and good flexibility. To this end, the researchers proposed an acrylic-organic silicon coating, which combines the strengths of acrylic coatings and silicone coatings. By introducing a certain amount of organic silicon functional groups into the main chain and side chain of the acrylic resin macromolecules, the Si-O The cov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/06C08F230/08C08F283/12C08F2/26C08F2/30C09D133/10C09D133/08C09D143/04C09D151/08
Inventor 刘伟区苏奎
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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