Photocured prepolymer, preparation method thereof and photocured costume jewelry molding glue prepared from photocured prepolymer

A technology of photocuring prepolymers and polymerization inhibitors, which is applied in the direction of non-polymer organic compound adhesives, adhesives, organic chemistry, etc., can solve the problems of unfavorable environmental protection, low efficiency, long process time, etc., to improve productivity, Good toughness and simple synthesis process

Active Publication Date: 2017-04-26
SUMDA MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the synthesis process, it is prepared by reacting dimercaptothiadiazole and glycidyl acrylate in a solvent. The process time is relatively long, the efficiency is low, and solvents are needed, which is not conducive to environmental protection.

Method used

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  • Photocured prepolymer, preparation method thereof and photocured costume jewelry molding glue prepared from photocured prepolymer
  • Photocured prepolymer, preparation method thereof and photocured costume jewelry molding glue prepared from photocured prepolymer
  • Photocured prepolymer, preparation method thereof and photocured costume jewelry molding glue prepared from photocured prepolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In parts by weight, add 68 parts of 3,4-epoxycyclohexyl methacrylate and 0.3 parts of 2,5-di-tert-butylhydroquinone into the reaction vessel, heat to 60°C, divide into three times Add 30 parts of dimercaptothiadiazole, pass through cooling water, and control the reaction temperature at 60°C. When the addition of dimercaptothiadiazole is complete, keep the temperature at 60°C for 1 hour. The entire reaction time is 3 hours, and a light yellow product is obtained from the discharge. The yield is 99.6%.

[0038] Its chemical structural formula is as follows:

[0039]

[0040] 1 HNMR (CDCl 3 ,PPM): δ5.83, 6.14, 6.41 H (CH 2 =CH), 4.30, 4.55 CH 2 (CH 2 OCO), 2.03CH(CH-CH 2 -OCO), 2.83 CH(CH-S), 1.38-1.87 CH 2 (on cyclohexyl), 3.84 CH (CH-OH), 4.77 OH.

Embodiment 2

[0042] In parts by weight, 35 parts of dimercaptothiadiazole and 0.5 part of 2,5-di-tert-butylhydroquinone were added to the reaction vessel, heated to 40°C, and 75 parts of 3,4-cycloquinone were added dropwise. Oxycyclohexyl methyl methacrylate, through cooling water, the reaction temperature is controlled at 40°C, when the 3,4-epoxycyclohexyl methyl methacrylate is added dropwise, keep warm at 50°C for 1 hour, the entire reaction time After 5 hours, the light yellow product was obtained by discharging, with a yield of 99.2%.

[0043] Its chemical structural formula is as follows:

[0044]

[0045] 1 HNMR (CDCl 3 ,PPM): δ6.40, 6.48 H (CH 2 =C), 2.01CH 3 (CH 3 CH 2 = CH), 4.30, 4.55 CH 2 (CH 2 OCO), 2.03 CH(CH-CH 2 -OCO), 2.83 CH(CH-S), 1.38-1.87 CH 2 (on cyclohexyl), 3.84 CH (CH-OH), 4.77 OH.

Embodiment 3

[0047]In parts by weight, add 25 parts of dimercaptothiadiazole, 0.2 parts of 2,5-di-tert-butylhydroquinone and 25 parts of isopropanol into the reaction vessel, heat to 70°C, and dropwise add 30 parts of 3,4-epoxycyclohexyl methyl methacrylate and 32 parts of 3,4-epoxycyclohexyl methacrylate, through cooling water, the reaction temperature is controlled at 70 ° C, when 3,4-epoxy cyclohexyl methacrylate After the addition of cyclohexyl methyl methacrylate and 3,4-epoxycyclohexyl methacrylate is completed dropwise, keep the temperature at 70°C for 1 hour, the entire reaction time is 4 hours, heat and distill isopropanol, and discharge the material to obtain Light yellow product, yield 98.9%.

[0048] Its chemical structural formula is as follows:

[0049]

[0050] 1 HNMR (CDCl 3 ,PPM): δ5.83, 6.14, 6.41 H (CH 2 =CH), 6.40, 6.48 H (CH 2 =C) 4.30, 4.55CH 2 (CH 2 OCO), 2.01 CH 3 (CH 3 CH 2 =CH), 2.03 CH(CH-CH 2 -OCO), 2.83 CH(CH-S), 1.38-1.87CH 2 (on cyclohexyl), 3...

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Abstract

The invention discloses a photocured prepolymer, a preparation method thereof and costume jewelry molding photocured glue prepared from the photocured prepolymer. The photocured prepolymer adopts a structural formula shown in the specification, wherein R1 and R2 are identical or different and are mutually independently represented as H or CH3. Cycloaliphatic epoxy groups are introduced to two ends of dimercaptothiadiazole, and the prepared photocured prepolymer has the advantages of high refractive index, good high-temperature resistance and weather fastness, low curing shrinkage rate and the like, and solves the problems of poor weather fastness and high probability of high-temperature yellowing during reflow soldering of the conventional UV curing system; by means of addition reaction synthesis of mercapto groups and cycloaliphatic epoxy groups with higher reactivity, the activity of epoxy bonds is very high, even a catalyst is not needed for the reaction, the synthetic process is simpler and consumes shorter time, energy consumption is reduced greatly, the productivity is increased, and better environment-friendliness is realized due to avoidance of solvent use.

Description

technical field [0001] The invention belongs to the technical field of light-curing materials, and in particular relates to a light-curing prepolymer, a preparation method thereof and a light-curing artificial jewelry molding glue prepared therefrom. Background technique [0002] At present, in the field of UV curing materials, the refractive index is one of the most important optical performance indicators of optical materials. High refractive index is one of the goals pursued by many optical materials, especially in the field of LED packaging. At present, the refractive index of mainstream LED packaging silicone materials is between 1.45 and 1.56. Of course, packaging silicone materials above 1.6 are also available on the market, but generally have a relatively high benzene ring content, poor weather resistance, and easy yellowing, and it is easy to add too much monomer. Brittle. In addition, the epoxy resin used for LED packaging has relatively poor high-temperature yell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D285/125C09J4/02C09J11/06
CPCC07D285/125C09J4/00C09J11/06
Inventor 赵东理
Owner SUMDA MATERIAL TECH CO LTD
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