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Acrylic-modified organosilicon nano paint and preparation method thereof

A nano-coating, acrylic technology, applied in the direction of coating, can solve the problems of AB two-component unfavorable storage stability, use, low transparency, etc., to avoid storage stability problems, prolong system stability, and improve the effect of brittleness

Active Publication Date: 2014-05-14
许立江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent with publication number 1544560 reports that silicone and polymethacrylate are the main film-forming materials. After adding catalysts, curing agents and other additives, the hardness of the coating film is improved, but the AB two-component is not conducive to storage stability. , and the transparency is not high
Similar to 1544560, the Chinese patent publication No. 1410476 reported the use of conventional curing agent hexamethylenediamine to catalyze the crosslinking of silicone resins, but it is not conducive to the preservation of coating components
Patent CN1190932A reports a kind of organosilicon coating composition that can be used for plastic film coating. The obtained micro-emulsion white translucent liquid has poor light transmittance performance and cannot be used as an optical grade film.
Patent CN101168645A reports silicone hardening coating, the hardness can reach 6H ~ 9H, but it is not clear what kind of material it is hardened on, and the reliability of the disclosed data is questionable

Method used

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  • Acrylic-modified organosilicon nano paint and preparation method thereof
  • Acrylic-modified organosilicon nano paint and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Vinyl triethoxysilane 20g, pentaerythritol triacrylate 2g, pentaerythritol tetraacrylate 2g, epoxy glycidyl acrylate 6g, methyl acrylate 5g, hydroxyethyl methacrylate 5g, acrylic acid 10g, isopropanol 25g Added to the three-necked flask in turn, mechanically stirred to disperse evenly. Place the three flasks in a constant temperature water bath and raise the temperature to 80°C, and drop 25 g of 2% azobisisobutyronitrile / isopropanol solution within half an hour to initiate free radical polymerization. After reflux for 2 h, tetramethylammonium hydroxide was added to neutralize the reaction product until the pH value was 7.0. Filter to remove impurities and precipitates, and add isopropanol to adjust the solid content to 50%, which is the acrylic acid-modified silicone prepolymer solution.

[0030] Add 10 g of acrylic modified silicone prepolymer solution, 20 g of tetraethyl orthosilicate, 12 g of γ-glycidyl etheroxypropyltrimethoxysilane, 2 g of dimethyldiethoxysilane, ...

Embodiment 2

[0036] Add 20g of 3-(methacryloyloxy)propyltrimethoxysilane, 10g of methyl methacrylate, 10g of hydroxyethyl acrylate, 10g of acrylic acid, and 25g of isopropanol into a three-necked flask in sequence, and mechanically stir to disperse evenly. The three flasks were placed in a constant temperature water bath and the temperature was raised to 70°C, and 2% dibenzoyl peroxide / isopropanol solution was added dropwise to initiate free radical polymerization. After reflux reaction for 2 h, ethylamine was added to neutralize the pH value of the reaction product to 6.5. Filter to remove impurities and precipitates, and collect the filtrate for future use, which is the acrylic acid-modified silicone prepolymer solution.

[0037] Add 20 g of acrylic modified silicone prepolymer solution, 20 g of tetraethyl orthosilicate, 12 g of KH560 silane, 2 g of dimethyl diethyl ester, 12 g of deionized water, 24 g of isopropanol, and 0.5 g of glacial acetic acid into the three-necked flask in sequen...

Embodiment 3

[0040] Add 20g of tetramethyl orthosilicate, 12g of methyltriethoxysilane, 2g of dimethyldimethoxysilane, 12g of deionized water, 36g of isopropanol, 0.5g of glacial acetic acid, and nano-oxidized 15g of silica sol, after being fully stirred evenly, the temperature was raised to 50°C for hydrolysis reaction, and the reaction time was 3h. Then stand at room temperature of 20°C for 4-7d to carry out aging reaction. Add isopropanol and defoamer BYK094, and adjust the solid content to 10% to obtain the coating.

[0041] A polycarbonate sheet with a thickness of 0.5mm was cleaned, pre-dried, sprayed, dried, and finally cured at 120°C for 2h. Under the load of 1000 grams force, the measured 1H. The surface of the coating has many defects, such as pits, orange peel and fine lines.

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Abstract

The invention discloses an acrylic-modified organosilicon nano paint and a preparation method thereof. The paint comprises the following components in parts by mass: 0-40 parts of acrylic-modified organosilicon prepolymer, 0-40 parts of tetraalkoxysilane, 0-40 parts of trialkoxysilane, 0-10 parts of dialkoxysilane, 0-40 parts of nano inorganic particle, 5-20 parts of deionized water, 0-5 parts of acid catalyst and 10-40 parts of organic solvent, wherein the tetraalkoxysilane and trialkoxysilane can not be 0 part at the same time. After the paint is applied onto a soft polycarbonate film or sheet and cured, the paint coating has the advantages of high hardness (1000g load, pencil hardness 3-4H), excellent wear resistance (0000# steel wool, 500g load, more than 1200 times), favorable transparency (the visible light transmittance is more than 93%), excellent adhesive force (after stripping with a 3M adhesive tape five times, the 100 / 100 coating does not shed), favorable temperature and water resistance (no change under high temperature (60 DEG C) and high humidity (90%) for 72 hours), and the like.

Description

technical field [0001] The invention relates to an organic silicon nano coating and a preparation method thereof, in particular to an acrylic modified organic silicon nano coating and a preparation method thereof. Background technique [0002] Optical resin materials have attracted people's attention due to their superior properties such as light weight, impact resistance, and safety. In the field of traditional optical glass material products, such as optical lenses, lenses, and mirror materials, the application range of optical resin materials is expanding day by day. However, compared with optical glass materials, resin materials have poor performance in terms of surface hardness, wear resistance, and corrosion resistance, so they are prone to defects such as scratches in daily applications, which affects the performance of the product and shortens the life of the product. service life. [0003] At present, optical resin materials at home and abroad are divided into two ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/10C09D7/12C08G77/442C08F230/08C08J7/04C08L69/00
Inventor 杨永喆
Owner 许立江
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