Method for modifying acrylic ester by using organic silicon

An acrylate and organosilicon technology, applied in the field of ultraviolet light curing, can solve the problems of increasing difficulty in product separation and purification, dark metal catalyst color, inconvenient experimental operation, etc., to achieve good surface and mechanical properties, improved surface gloss, easy-to-control effects

Inactive Publication Date: 2013-06-26
HUAINAN UNITED UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Silicone has very low viscosity-temperature coefficient, excellent interfacial properties, good lubricity, chemical stability and outstanding weather resistance. Silicone modified UV curing system can obtain a cured layer with better performance. The modified silicone materials used in the photocuring system are mainly obtained in the following ways: one is the reaction between silicon-containing halides and acrylates with hydroxyl groups, and the disadvantage is that the products contain hydrogen halides, which are not easy to remove. , easily affect the performance of the final cured coating
The other is prepared by reacting silicone oil with Si-H bond with acrylate or polyacrylic acid ester with hydroxyl group under the catalysis of platinum and other metal compounds. The disadvantage is that more expensive metal catalysts and metal catalysts are used in the synthesis process The color of the catalyst is darker, which affects the color of the product, and the experimental operation is inconvenient, etc.
In addition, it is prepared by reacting silicon-containing compounds with easily hydrolyzed groups such as methoxyl groups and ethoxyl groups in alkaline solutions with acrylates or polyacrylic acid esters with hydroxyl groups. The disadvantage is that a strong alkali solution is used in the reaction. , making the separation and purification of the product more difficult

Method used

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  • Method for modifying acrylic ester by using organic silicon

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Add 35.86g of 3-aminopropyltrimethoxysilane into a 250ml three-neck round bottom flask, stir electrically, and take an oil bath at 30°C, and take another 56.46g of isocyanatoethyl acrylate, add it slowly, and then heat up to 80°C for reaction 12h.

Embodiment 2

[0018] Add 44.28g of 3-aminopropyltriethoxysilane to a 250ml three-neck round bottom flask, stir electrically, and take an oil bath at 50°C, and take another 62.06g of isocyanatoethyl methacrylate, drop it slowly, and continue the reaction for 24 hours after the drop is completed .

Embodiment 3

[0020] Add 102.78g of bis(-γ-trimethoxysilylpropyl)amine to a 250ml three-necked round-bottomed flask, stir electrically, and take an oil bath at 70°C, and take another 42.35g of isocyanatoethyl acrylate, slowly add it dropwise, and drop it completely Afterwards, the temperature was raised to 90°C for 8 hours.

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Abstract

The invention discloses a method for modifying acrylic ester by using organic silicon. The method comprises the following steps of: reacting amino silane or amino silicone oil with the molecular weight of 100-10 000 with the acrylic ester containing an isocyanate group for 2-24 hours, wherein the molar ratio of the isocyanate group to amino is 1:(0.9-6). The synthesis method for modifying the acrylic ester by using the organic silicon provided by the invention is free from side reaction occurrence, simple in synthesis method, and high in product purity, and the obtained modified acrylic ester not only can be independently photo-cured to form a membrane, but also can be used as a reactive diluent in an ultraviolet photo-curing system.

Description

technical field [0001] The invention belongs to the field of ultraviolet light curing, and in particular relates to a method for silicone-modified acrylate. Background technique [0002] Silicone has very low viscosity-temperature coefficient, excellent interfacial properties, good lubricity, chemical stability and outstanding weather resistance. Silicone modified UV curing system can obtain a cured layer with better performance. The modified silicone materials used in the photocuring system are mainly obtained in the following ways: one is the reaction between silicon-containing halides and acrylates with hydroxyl groups, and the disadvantage is that the products contain hydrogen halides, which are not easy to remove. , easily affect the performance of the final cured coating. The other is prepared by reacting silicone oil with Si-H bond with acrylate or polyacrylic acid ester with hydroxyl group under the catalysis of platinum and other metal compounds. The disadvantage i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/81C08G18/61C08G18/38
Inventor 伍斌
Owner HUAINAN UNITED UNIVERSITY
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