Self-drying low aliphatic chain oxosilane modified water-borne acrylic resin and preparation method thereof

A water-based acrylic and chain siloxane technology, used in coatings, latex paints, anti-corrosion coatings, etc., can solve the problems of low aging resistance, poor emulsion stability, complex process flow, etc., and achieve low cost, molecular weight and other problems. The effect of easy control and wide application range

Inactive Publication Date: 2010-06-16
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of emulsion polymerization is not only complicated and demanding, but also the stability of the obtained emulsion is not good, and separation and coagulation are prone to occur; in addition, the coatings prepared according to the above documents have good water resistance, scrub resistance, stain resistance, and aging resistance. The performance is not high and needs to be improved

Method used

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  • Self-drying low aliphatic chain oxosilane modified water-borne acrylic resin and preparation method thereof
  • Self-drying low aliphatic chain oxosilane modified water-borne acrylic resin and preparation method thereof
  • Self-drying low aliphatic chain oxosilane modified water-borne acrylic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 75 g of ethylene glycol butyl ether was added to the four-necked flask, and the temperature was raised to 90°C. then drop

[0042] Methyl methacrylate 50g,

[0043] Butyl methacrylate 10g,

[0044] Methacrylic acid 10g,

[0045] Acrylate-beta-hydroxypropyl ester 4g,

[0046] Styrene 8g,

[0047] Vinyl tertiary carbonate 4g,

[0048] Dodecylmercaptan 1g,

[0049] Benzoyl peroxide 1.5g,

[0050] Trimethoxyethylsilane 15g,

[0051] The temperature was raised to 100°C, and the dropwise addition was completed in 2 and a half hours. React at 110°C for 1 hour, cool to below 50°C, and adjust the pH value to 8-9 with triethylamine. Add 25 g of water for dispersion to obtain a light yellow water-dispersed silicone-modified acrylic resin with a solid content of 50%.

Embodiment 2

[0053] Use n-butanol and ethylene glycol butyl ether at a ratio of 1:1 as solvent, and heat up to 90°C. then drop

[0054] Methyl methacrylate 55g,

[0055] Butyl methacrylate 15g,

[0056] Methacrylic acid 10g,

[0057] Acrylate-beta-hydroxypropyl ester 4g,

[0058] Styrene 8g,

[0059] Vinyl tertiary carbonate 4g,

[0060] Dodecylmercaptan 1g,

[0061] Benzoyl peroxide 1.5g,

[0062] Trimethylolsilane 12g,

[0063] The temperature was raised to 100°C, and the dropwise addition was completed in 2 and a half hours. React at 110°C for 1 hour, cool to below 50°C, and adjust the pH value to 8-9 with triethylamine. 25 g of water was added for dispersion to obtain a water-dispersed silicone-modified acrylic resin with a solid content of 54%.

Embodiment 3

[0065] Ethylene glycol monoethyl ether was used as a solvent, and the temperature was raised to 90°C. then drop

[0066] Methyl methacrylate 60g,

[0067] Methyl acrylate 5g,

[0068] Butyl acrylate 15g,

[0069] Acrylic acid 7g,

[0070] 2 g of β-hydroxyethyl acrylate,

[0071] Styrene 2g,

[0072] Vinyl tertiary carbonate 2g,

[0073] Benzoyl peroxide 3g,

[0074] Dodecylmercaptan 3g,

[0075] Trimethylolsilane 10g,

[0076] The temperature was raised to 100°C, and the dropwise addition was completed in 2 and a half hours. React at 110°C for 1 hour, cool to below 50°C, and adjust the pH value to 8-9 with ammonia water. 25 g of water was added for dispersion to obtain a water-dispersed silicone-modified acrylic resin with a solid content of 54%.

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Abstract

This invention discloses a self-drying low aliphatic chain oxosilane modified water-borne acrylic resin and preparation method thereof. The water-borne acrylic resin is prepared by adding a solvent into (methyl) acrylate monomers, styrene monomers, vinyl versatate monomers, low aliphatic chain oxosilane monomers, initiators and chain transfer agents to form mixed solution, and then carrying out polymerization reaction on the mixed solution. The preparation method is characterized in that a novel normal temperature self-drying water-dispersed resin is obtained by carrying out solution polymerization and using the low aliphatic chain oxosilane monomers, and simultaneously by carrying out polymerization and carrying out hydrolysis and cross-linking on the modified acrylic resin. In addition, the resin obtained by selecting the non-toxic or low-toxicity solvent and then carrying out solution polymerization through an one-pot method has the characteristics of environmental friendliness, low cost, good water resistance and high hardness, and the like, and can be used for producing normal temperature curing water-borne paint.

Description

technical field [0001] The invention relates to a preparation method of self-drying low-fat chain siloxane modified water-based acrylic resin. Background technique [0002] Coatings with copolymers of (meth)acrylic acid and its esters as the main film-forming site are collectively referred to as acrylic coatings. Water-based acrylic paint has light color, full film and good mechanical strength, and has become an important type of paint. But its anti-fouling, poor water resistance, hardness and weather resistance are not good enough, and the addition of siloxane to form a cross-linked network can just make up for this defect. The surface coating of metal building boards, the hard protective coating on plastic surfaces such as plexiglass and polycarbonate, not only require the coating to be glossy, good in color, and high in mechanical strength, but also require it to have good antifouling, dustproof, and anti-fouling properties. Aging performance. For this reason, people h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F220/28C08F212/08C08F218/04C08F8/42C09D133/12C09D5/02C09D5/08
Inventor 李会宁梁鉴泉曹德榕唐聚宝陈仕箐
Owner SOUTH CHINA UNIV OF TECH
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