Single-component organic siloxane/inorganic silica sol hybrid high-silicone-content polyacrylate waterborne dispersion and preparation method thereof

A technology of organosiloxane and polyacrylate, which is applied in the direction of antifouling/underwater coatings, biocide-containing paints, coatings, etc. It can solve problems such as difficulty in preparation, improve the comprehensive performance of the coating film, and stabilize the synthesis process Efficient, improve the effect of electrostatic repulsion

Active Publication Date: 2017-06-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, in the prior art, it is still difficult to prepare an organo-inorganic silicon hybrid water-based polyacrylate with storage stability, high coating film hardness and high resistance

Method used

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  • Single-component organic siloxane/inorganic silica sol hybrid high-silicone-content polyacrylate waterborne dispersion and preparation method thereof
  • Single-component organic siloxane/inorganic silica sol hybrid high-silicone-content polyacrylate waterborne dispersion and preparation method thereof
  • Single-component organic siloxane/inorganic silica sol hybrid high-silicone-content polyacrylate waterborne dispersion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1: Preparation of one-component organosiloxane / inorganic silica sol hybrid high silicon content polyacrylate aqueous dispersion (ABC-1)

[0045] Add 50 g of propylene glycol methyl ether into a reaction vessel equipped with a stirring blade, a thermometer, a dropping funnel, and a condenser, and the temperature is raised to 80°C. Combine 25.2g methyl methacrylate, 19.6g n-butyl acrylate, 21g n-butyl methacrylate, 4.2g acrylic acid, 1.4g azobisisobutyronitrile, and 2.1g γ-methacryloxypropyl trimethoxy The base silane is mixed uniformly to prepare a monomer initiator mixture, which is placed in a dropping funnel, and within 3 hours, it is added dropwise to the above solvent, and the reaction is continued at 80°C for 4 hours. Cool down to 40°C, add 5g of triethylamine, neutralize the carboxyl group in the resin to prepare the silylated polyacrylate resin (A-1), and discharge it for later use.

[0046] 67 g of silica sol was added to the reaction vessel, and the tempera...

Embodiment 2

[0057] Example 2: Preparation of one-component organic-inorganic silicon / polyacrylate hybrid water dispersion (ABC-2)

[0058] The silylated polyacrylate resin (A-2) was prepared with the same usage, dosage and process as in Example 1.

[0059] The functionalized silica sol (B-2) was prepared with the same usage, dosage and process as in Example 1.

[0060] Polyorganosiloxane (C-2) was prepared with the same usage, dosage and process as in Example 1.

[0061] Mix the silanized polyacrylate resin (A-2) and polyorganosiloxane (C-2) uniformly at 40°C, and disperse them into 64g deionized water at a speed of 3000 rpm, and then Add the above-mentioned functionalized silica sol (B-2) at the same rotation speed to obtain a one-component organic siloxane / inorganic silica sol hybrid high-silicon polyacrylate aqueous dispersion (ABC- 2).

Embodiment 3

[0062] Example 3: Preparation of one-component organosiloxane / inorganic silica sol hybrid high silicon content polyacrylate aqueous dispersion (ABC-3)

[0063] Add 30 g of propylene glycol methyl ether and 40 g of isopropanol to a reaction vessel equipped with a stirring blade, a thermometer, a dropping funnel, and a condenser, and the temperature is raised to 80°C. 25.2g methyl methacrylate, 16.8g n-butyl acrylate, 21g n-butyl methacrylate, 3.5g acrylic acid, 3.5g hydroxypropyl acrylate, 1.4g azobisisobutyronitrile and 2.1g vinyl trimethoxy The base silanes are mixed uniformly to prepare a monomer initiator mixture, which is placed in a dropping funnel, and within 3 hours, it is added dropwise to the above mixed solvent, and the reaction is continued for 4 hours at the same temperature. The temperature was lowered to 40°C, the vacuum pump was turned on, the isopropanol was removed, and 4.2g of triethylamine was added to neutralize the carboxyl group in the resin to obtain the si...

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Abstract

The invention discloses a single-component organic siloxane / inorganic silica sol hybrid high-silicone-content polyacrylate waterborne dispersion and a preparation method thereof. The preparation method comprises the steps of firstly preparing silylated polyacrylate resin and then preparing polysiloxane to obtain functionalized silica sol; mixing the silylated polyacrylate resin and polysiloxane at 40-80 DEG C evenly to prepare composite resin; diluting the obtained functionalized silica sol in 50-300 parts of deionized water at room temperature; and adding the composite resin to the diluted functionalized silica sol under high-speed agitation to prepare the single-component organic siloxane / inorganic silica sol hybrid high-silicone-content polyacrylate waterborne dispersion. By simply mixing a neutralized carboxyl-containing silylated polyacrylate resin, a polysiloxane segment and functionalized silica hydrosol, the formed waterborne composition can be stored for a long period of time without the problems of coagulation, viscosity increase and gelatinization.

Description

Technical field [0001] The invention relates to a polyacrylate hybrid water dispersion, in particular to a one-component self-crosslinkable organosiloxane / inorganic silica sol hybrid polyacrylic acid with high film hardness and resistance. Aqueous ester dispersion and its preparation method. Background technique [0002] Using organic-inorganic hybrid technology to modify water-based acrylic resins can learn from each other and obtain hybrid resins with excellent comprehensive performance. The common practice is to introduce inorganic components into the organic resin system to form an inorganic network to form an organic-inorganic composite resin. Among the inorganic components, silica particles and silicone resins are more common. [0003] Chinese patent CN 101517021 A describes a method for producing an aqueous two-liquid curable coating composition, which is mainly composed of a hydrolysis polycondensation product of di- or trialkoxysilane and a polyacrylic resin with neutral...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/14C09D183/04C09D7/12C09D5/16C08F220/14C08F220/18C08F220/06C08F230/08C08F220/28C08G77/08C08G77/06
CPCC09D143/04C08F220/14C08G77/06C08G77/08C09D5/1675C09D5/1687C08K2201/011C08L83/04C08K9/06C08K3/36C08F220/1804C08F220/06C08F230/08C08F220/281
Inventor 皮丕辉曾一成文秀芳徐守萍程江
Owner SOUTH CHINA UNIV OF TECH
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