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A kind of preparation method of uv curing resin for anti-fog coating

A technology for curing resins and anti-fog coatings, applied in the field of ultraviolet light curing, and can solve problems such as easy exposure and aggregation

Active Publication Date: 2016-04-20
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The innovation of this technology lies in the use of esterification-polycondensation-chain extension method to obtain a hydroxyl-terminated resin with high purity, large molecular weight and narrow molecular weight distribution through staged temperature-controlled polycondensation, and select N,N-2-Methylformamide ( DMF) as solvent and anhydrous MgSO 4 As a water-absorbing agent to prepare UV-curable resin for anti-fog coatings, it can not only solve the problem that high-molecular-weight polyester reacts with MAA due to excessive viscosity, but also can absorb the water produced by the reaction in time to maximize the reaction. The obtained water-based UV curable anti-fog coating has excellent water resistance, adhesion, hardness and anti-fog hydrophilic performance

Method used

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  • A kind of preparation method of uv curing resin for anti-fog coating
  • A kind of preparation method of uv curing resin for anti-fog coating
  • A kind of preparation method of uv curing resin for anti-fog coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] (1) Synthesis of hydroxyl-terminated resin, the quality of each component is as follows:

[0012]

[0013] Put 30g of dimethylolpropionic acid (DMPA), 50g of isophthalic acid-5-sodium sulfonate and 1g of p-toluenesulfonic acid in a four-necked flask with stirring, condensation and water separation and heating devices, and add 100g to Stir and dissolve the ionic water at low temperature until it is colorless and transparent, start heating, wait until the temperature rises to 110°C, water starts to flow out, react for 1.5 hours, the measured acid value reaches the predetermined value, and the esterification is completed; then add 0.1g of tetraisobutyl titanate , start polycondensation, control the temperature at 140°C, 160°C and 180°C for 0.5h each, the measured hydroxyl value reaches the predetermined value, and the polycondensation ends; finally, keep the temperature between 180°C, add 3g of hexamethylene diisocyanate (HDI) and 0.3g antioxidant enter the chain extens...

Embodiment 2

[0018] (1) Synthesis of hydroxyl-terminated resin, the quality of each component is as follows:

[0019]

[0020] Place 35g of dimethylolpropionic acid (DMPA), 55g of isophthalic acid-5-sodium sulfonate and 1.2g of p-toluenesulfonic acid in a four-necked flask with stirring, condensation and water separation and heating devices, and add 150g Stir and dissolve deionized water at low temperature until it is colorless and transparent, start heating, wait for the temperature to rise to 110°C, start to discharge water, react for 2 hours, the measured acid value reaches the predetermined value, and the esterification is completed; then add tetraisobutyl titanate, start For polycondensation, the temperature was controlled at 140°C, 160°C and 180°C for 1 hour respectively, and the measured hydroxyl value reached the predetermined value, and the polycondensation ended; finally, keeping the temperature between 180-200°C, adding 2g of hexamethylene diisocyanate ( HDI) and 0.5g antioxi...

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Abstract

The invention relates to a preparation method of UV curable resin used for an antifogging coating, which employs a method of esterification-polycondensation-chain extension to prepare hydroxyl terminated resin, and the method takes N, N-2-methylformamide (DMF) as a solvent, and takes anhydrous MgSO4 as a water absorbing agent to prepare the UV curable resin used for antifogging coating. The prepared UV curable resin has the advantages of high resin purity, large molecular weight and narrow molecular weight distribution, and can be used for preparing an aqueous antifog paint used for eyeglasses; the resin preparation technology accords with an green environmental protection idea, and has the advantages of fast solidification film forming, good integration performance and good market prospect, and is adapted to popularization and application.

Description

technical field [0001] A preparation method of UV curing resin for anti-fog coating belongs to the field of ultraviolet light curing Background technique [0002] At present, with the enhancement of people's awareness of environmental protection, the research on UV curable resins for anti-fog coatings is being favored by more and more researchers. In the existing reports on the synthesis of UV-curable resins for anti-fog coatings, polycondensation or polycondensation after esterification are generally used. These methods are mostly suitable for the preparation of hydroxyl-terminated resins with low molecular weights. Not only the molecular weight is not large, but the distribution is wide , the purity is not high and most of the synthesis process uses toxic organic solvents as water-carrying agents, which will cause a certain degree of pollution to the environment; and first use esterification-polycondensation-chain extension method to prepare hydroxyl-terminated resin, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/83C08G18/46C08G63/688C09D175/14
CPCC08G18/4676C08G18/831C08G63/6886C09D175/14
Inventor 姚伯龙李根龙韩兵
Owner JIANGNAN UNIV