A kind of vegetable oil and organosilicon composite modification, UV-curable nano silicon dioxide, preparation method and application thereof

A nano-silica and vegetable oil modification technology, which is applied in dyeing organosilicon compound treatment, chemical instruments and methods, dyeing polymer organic compound treatment, etc., to achieve the effect of improving hardness, delicate hand feeling and excellent chemical resistance

Active Publication Date: 2021-10-22
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of nanometer disulfide compound modified by vegetable oil and silicone, which can be cured by UV, aiming at the existing problems in the field of water-based wood coatings and putting forward higher requirements on the chemical resistance and hand feeling of water-based coatings. Silica, its preparation method and its application in waterborne UV wood coatings

Method used

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  • A kind of vegetable oil and organosilicon composite modification, UV-curable nano silicon dioxide, preparation method and application thereof
  • A kind of vegetable oil and organosilicon composite modification, UV-curable nano silicon dioxide, preparation method and application thereof
  • A kind of vegetable oil and organosilicon composite modification, UV-curable nano silicon dioxide, preparation method and application thereof

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preparation example Construction

[0036] Specifically, the preparation method of composite modified nano silicon dioxide of the present invention comprises the following steps:

[0037] (1) at 35-55°C, preferably at about 45°C, place the aforementioned stoichiometric components (a), (b) and an appropriate amount of solvent acetone in a reactor to react to prepare a vegetable oil modified prepolymer;

[0038] (2) Raise the temperature to 65-75°C, add the aforementioned component (c) and an appropriate amount of solvent acetone into the reaction kettle, continue the reaction until the remaining NCO content reaches the theoretical value, stop the reaction, and remove the acetone to obtain acrylic acid Ester half-capped vegetable oil modified prepolymer, spare;

[0039] (3) Disperse the components (d) and (e) in the aforementioned metered ratio in the solvent n-heptane for 1h, and let it stand for 2d to obtain the silicone surface-modified silica, dry it and redisperse it in ethanol , adding the component (f) in ...

Embodiment 1

[0044] (1) 12g of dehydrated isophorone diisocyanate, 24g of castor oil and 15g of acetone were added to a 1L four-necked round bottom flask equipped with a nitrogen inlet and outlet, and the mixture was stirred at 45°C until the NCO reached 5.82wt %.

[0045] (2) Heat up to 70° C., add 8.1 g of pentaerythritol triacrylate and 12 g of acetone, continue to stir and react until NCO reaches 2.46 wt %, remove acetone, and prepare a semi-blocked prepolymer for later use.

[0046] (3) Add 20g of nano-silica with a hydroxyl content of 4.4mmol / g and 450g of n-heptane into a 1L four-neck round bottom flask, stir for 10min, add 3g of hydroxyl-terminated polydimethylsiloxane, and continue stirring 1h, after stirring, let it stand for 2d, and dry the product after the reaction is over; put the dried nano silicon dioxide in a 5L four-neck round bottom flask, add 3000g of absolute ethanol and ultrasonically disperse evenly; Add 30ml of acetic acid aqueous solution (pH value is 4.5) to the ...

Embodiment 2

[0049] (1) Add 10 g of dehydrated isophorone diisocyanate, 18 g of soybean oil alcoholyzate and 12 g of acetone into a 1L four-necked round-bottomed flask equipped with a nitrogen inlet and outlet, and stir the mixture at 50°C until NCO up to 6.75 wt%.

[0050] (2) Heat up to 75°C, add 2.93g of hydroxyethyl methacrylate and 10 grams of acetone, continue to stir and react until NCO reaches 3.07wt%, remove acetone, and prepare a semi-blocked prepolymer for later use.

[0051] (3) Add 25g of nano-silica with a hydroxyl content of 4.2mmol / g and 400g of n-heptane into a 1L four-neck round bottom flask, stir for 10min, add 2g of hydroxyl-terminated polydimethylsiloxane, and continue stirring 1h, after stirring, let it stand for 2d, and dry the product after the reaction; put the dried nano-silica in a 5L four-neck round bottom flask, add 2500g of absolute ethanol and ultrasonically disperse it evenly; Add 20ml of acetic acid aqueous solution (pH value is 4.5) to the dispersion at ℃...

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Abstract

The invention relates to a composite modification of vegetable oil and organic silicon capable of UV-curing nano-silica, a preparation method and its application in water-based UV wood coatings. It is prepared by reacting components containing the following weight content: isocyanate 11-18.5% , Modified vegetable oil polyol 24-37%, hydroxy acrylate 4-14%, nano silicon dioxide 27.5-44%, hydroxyl-terminated silicone oil 2.5-5%, aminosilane coupling agent 2.5-5%. The modified nano-silica prepared by the invention can participate in the curing reaction of UV resin, so that the combination of matting powder and resin in the coating is more compact, and can effectively solve the problem of whitening of the matte coating film over time. At the same time, when the nano-silica modified by vegetable oil and silicone is applied to matte paint, it can endow the paint film with more excellent chemical resistance and a more delicate feel.

Description

technical field [0001] The invention relates to the field of water-based wood coatings, in particular to nano-silica which is compositely modified by vegetable oil and organic silicon and which can be cured by UV, a preparation method and its application in water-based UV wood coatings. Background technique [0002] Nowadays, environmental issues have been paid more and more attention by governments all over the world. In the field of coatings, traditional solvent-based coatings are restricted in more and more application fields due to their high VOC emissions and greater harm to the human body and the environment. In contrast, the superiority of water-based environmentally friendly coatings has become increasingly prominent. Compared with ordinary water-based coatings, water-based UV coatings have more efficient production efficiency and excellent comprehensive performance, and are becoming a new development direction in the field of wood coatings. [0003] In the subdivi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/30C09C3/12C09C3/10C09C3/08C09D7/62C08G18/67C08G18/12C08G18/61
CPCC08G18/12C08G18/36C08G18/672C08K3/36C08K9/08C08K2201/011C09C1/309C09C3/006C09C3/08C09C3/10C09C3/12C09D7/62C08G18/61
Inventor 孙常青李燕杨瑶瑶孙伟祖
Owner WANHUA CHEM GRP CO LTD
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