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Polyurethane acrylate hybrid fluorine-containing silicon resin, preparation method and application

A polyurethane acrylate and acrylate technology, applied in the field of coating materials, can solve the problems of long surface drying time, low double bond conversion rate, coating surface defects, etc., and achieve high coating crosslinking density and hardness, fast light curing. Effects of speed, high double bond conversion

Active Publication Date: 2022-03-01
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the sake of beauty, the back cover usually has the characteristic of high gloss, but it will inevitably be polluted by grease from fingers, cosmetics and other dirt in life
These dirt are difficult to remove, and even need to be wiped several times to remove, which has a great impact on the aesthetics of the mobile phone
[0003] The method for preparing UV-curable fluorine-containing silicon antifouling resin in the prior art is mainly by adding methacryloxypropyltrimethoxysilane (KH-570) during the synthesis of fluorine-containing silicone resin, and introducing photocurable However, the prepared photocurable fluorine-containing silicone resin not only has slow curing speed, long surface drying time, and low double bond conversion rate, but also has poor compatibility after compounding with multifunctional acrylate resin. Poor, the surface of the prepared coating is prone to defects, which affects the light transmittance of the coating, and the wear resistance is poor

Method used

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  • Polyurethane acrylate hybrid fluorine-containing silicon resin, preparation method and application
  • Polyurethane acrylate hybrid fluorine-containing silicon resin, preparation method and application
  • Polyurethane acrylate hybrid fluorine-containing silicon resin, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Preparation of acryloxy-containing siloxane

[0048] Add 5.806g (0.05mol) of hydroxyethyl acrylate, 10.264g (0.05mol) of 3-isocyanatopropyltrimethoxysilane, dibutyltin dilaurate to a four-necked flask equipped with a stirrer, a reflux condenser and a thermometer. 0.016 g and 5 g of methyl ethyl ketone were stirred and reacted in an oil bath at 60° C. for 4 hours. After that, it was washed three times with n-hexane, and distilled under reduced pressure to obtain light yellow acryloyloxy-containing siloxane (A1).

[0049] (2) Preparation of polyurethane acrylate hybrid fluorine-containing silicone resin

[0050] To a 100mL four-necked flask equipped with a reflux condenser, dropping funnel and thermometer, add 1H, 1H, 2H, 2H-perfluorooctyltrimethoxysilane 4.683g (0.01mol), propyltrimethoxysilane 6.571 g (0.04mol), 3.214g (0.01mol) of acryloxy-containing siloxane (A1), 5g of isopropanol and 0.02g of hydroquinone, the mixture was stirred uniformly and heated to 50°C. ...

Embodiment 2

[0054] (1) Preparation of acryloxy-containing siloxane

[0055] Add 10.000 g (0.05 mol) of 1,3-propanetriol diacrylate and 10.264 g (0.055 mol) of 3-isocyanatopropyl trimethoxysilane into a four-necked flask equipped with a stirrer, a reflux condenser and a thermometer , 0.022 g of stannous octoate and 6 g of methyl ethyl ketone were stirred and reacted in an oil bath at 65° C. for 4 hours. After that, it was washed three times with n-hexane, and distilled under reduced pressure to obtain light yellow acryloyloxy-containing siloxane (A2).

[0056] (2) Preparation of polyurethane acrylate hybrid fluorine-containing silicone resin

[0057] To a 100mL four-necked flask equipped with a reflux condenser, a dropping funnel and a thermometer, add 5.863g (0.01mol) of 1H, 1H, 2H, 2H-perfluorodecyltrimethoxysilane, 3.756g of ethyltrimethoxysilane g (0.025mol), 3.242g (0.008mol) of acryloxy-containing siloxane (A2), 5g of toluene and 2-tert-butyl Hydroquinone 0.025g, the mixture was ...

Embodiment 3

[0061] (1) Preparation of acryloxy-containing siloxane

[0062] Add 14.900 g (0.05 mol) of pentaerythritol triacrylate, 14.000 g (0.06 mol) of 3-isocyanatopropyltriethoxysilane, 14.000 g (0.06 mol) of dilauric acid di 0.029 g of butyltin and 8 g of toluene were stirred and reacted in an oil bath at 70° C. for 5 hours. After that, it was washed three times with n-hexane, and distilled under reduced pressure to obtain light yellow acryloyloxy-containing siloxane (A3).

[0063] (2) Preparation of polyurethane acrylate hybrid fluorine-containing silicone resin

[0064] To a 100mL four-necked flask equipped with a reflux condenser, a dropping funnel and a thermometer, add 4.104 g (0.01 mol) of 1H, 1H, 2H, 2H-nonafluorohexyltriethoxysilane, 4.928 propyltrimethoxysilane g (0.03 mol), 1.510 g (0.003 mol) of acryloxy-containing siloxane (A3), 6 g of toluene, and 0.04 g of hydroquinone, the mixture was stirred uniformly and heated to 40°C. A mixture of 0.064 g of a small amount of ox...

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Abstract

The invention provides polyurethane acrylate hybrid fluorine-containing silicon resin, a preparation method and application, and belongs to the field of coating materials, and the preparation method comprises the following steps: mixing an acrylate monomer, isocyanate siloxane, a catalyst I and a solvent I, heating to 50-70 DEG C, carrying out a stirring reaction, washing with normal hexane, and carrying out reduced pressure distillation to obtain acryloyloxy-containing siloxane; then mixing fluoroalkyl siloxane, alkane siloxane, siloxane containing acryloyloxy, a solvent II and a polymerization inhibitor, heating to 30-50 DEG C, dropwise adding a mixture of a catalyst II and deionized water within 0.5-1 hour, heating to 50-70 DEG C, stirring to react, adding hexamethyldisiloxane, heating to 70-80 DEG C, stirring to react for 1-3 hours, washing with water, and drying to obtain the siloxane containing acryloyloxy. After 3000 times of friction cycle tests, the polyurethane acrylate hybrid fluorine-containing silicon resin still has high water and cetane contact angle, high light transmittance and long-acting antifouling effect.

Description

technical field [0001] The invention belongs to the field of paint materials, and in particular relates to a polyurethane acrylate hybrid fluorine-containing silicone resin, a preparation method and an application thereof, and is particularly suitable for use as a UV light-cured antifouling paint. Background technique [0002] With the advent of the 5G era, due to the massive MIMO technology used in 5G, a large number of antennas need to be added to the mobile phone, and metal will shield and interfere with the signal, so the demetallization of the back cover of the mobile phone will be the general trend. Materials are shifting from metals to glass, ceramics and plastics. The back cover made of glass and ceramics has poor drop resistance, and at the same time, the plastic is high-quality and cheap, and the processing technology such as injection molding is mature and the quantity rate is high. Therefore, the plastic material has great development prospects. For the sake of ...

Claims

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Application Information

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IPC IPC(8): C08G18/61C08G18/67C08G18/71C09D175/14
CPCC08G18/718C08G18/672C08G18/61C08G18/673C09D175/14C08L75/14Y02E10/50
Inventor 李小杰吕朝龙魏玮刘晓亚
Owner JIANGNAN UNIV
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