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Preparation method of optical resin monomer and reaction system thereof

A technology of optical resin and reaction system, applied in the field of optical resin, can solve the problems of poor stamping resistance and difficult molding of optical resin monomers, and achieve the effects of not easy to cure splits, stable heat release, and increased contact time and contact area

Active Publication Date: 2021-12-24
湖北巴乐福化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of optical resin monomer and its reaction system, aiming to solve the problem of poor stamping resistance of optical resin monomer, which leads to difficult molding

Method used

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  • Preparation method of optical resin monomer and reaction system thereof
  • Preparation method of optical resin monomer and reaction system thereof
  • Preparation method of optical resin monomer and reaction system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of preparation method of optical resin monomer, carries out according to the following steps:

[0040] S1: In terms of parts by mass, add 150 parts of dimethyl terephthalate, 320 parts of allyl alcohol, and 2 parts of calcium hydroxide into a glass reaction kettle in sequence, pass in nitrogen protection, and then directly heat up to 120°C. After reacting for 12-15 hours, the reaction solution was obtained. After testing, the product yield was 78%. At the same time, a condensation reflux device was installed on the glass reactor to condense and reflux the allyl alcohol and recover the product methanol;

[0041] S2: Transfer the reaction solution obtained in S1 into a vacuum distillation kettle, heat up to 140°C for 6-10 hours of vacuum distillation, and collect the front and back fractions of the generated steam through a condensing device;

[0042] S3: Add the back fraction obtained in S2, 15 parts of propylene glycol and 2 parts of calcium hydroxide into the co...

Embodiment 2

[0046] A kind of preparation method of optical resin monomer, carries out according to the following steps:

[0047] S1: In terms of parts by mass, add 140 parts of dimethyl terephthalate, 280 parts of allyl alcohol, and 1 part of calcium hydroxide into a glass reaction kettle in sequence, pass in nitrogen gas for protection, and then adopt the method of temperature programming, React for 12-15 hours to obtain the reaction liquid. At the same time, install a condensation reflux device on the glass reactor to condense and reflux the allyl alcohol and recover the product methanol;

[0048] S2: Transfer the reaction solution obtained in S1 into a vacuum distillation kettle, heat up to 140°C for 6-10 hours of vacuum distillation, and collect the front and back fractions of the generated steam through a condensing device;

[0049] S3: Add the rear fraction obtained in S2, 10 parts of propylene glycol and 1 part of calcium hydroxide into the condensation reactor, stir and heat up to...

Embodiment 3

[0054] A kind of preparation method of optical resin monomer, carries out according to the following steps:

[0055] S1: In terms of parts by mass, add 140 parts of dimethyl terephthalate, 280 parts of allyl alcohol, and 1 part of calcium hydroxide into a glass reaction kettle in sequence, pass in nitrogen gas for protection, and then adopt the method of temperature programming, React for 12-15 hours to obtain the reaction liquid. At the same time, install a condensation reflux device on the glass reactor to condense and reflux the allyl alcohol and recover the product methanol;

[0056] S2: Transfer the reaction solution obtained in S1 into a vacuum distillation kettle, heat up to 140°C for 6-10 hours of vacuum distillation, and collect the front and back fractions of the generated steam through a condensing device;

[0057] S3: Add the back distillate obtained in S2, 1 part of propylene glycol and 1-2 parts of calcium hydroxide into the condensation reaction kettle, stir and...

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Abstract

The invention relates to the field of optical resin monomers, and discloses a preparation method of an optical resin monomer and a reaction system thereof. The preparation method comprises the following steps of S1, preparing diallyl terephthalate, S2, purifying the diallyl terephthalate, S3, preparing a mixture I, S4, preparing a mixture II, and S5, preparing an optical resin monomer. After the mixture II is added into the optical resin monomer, the mechanical property of the optical resin monomer is improved, the hardness and the stamping resistance of the material are improved, later lens processing is facilitated, then the weather resistance and the corrosion resistance of the lens prepared from the optical resin monomer are improved, and finally, unsaturated double bonds of the polyester part of the mixture II provide the capability of free radical addition polymerization reaction, and the unsaturated double bonds can be further polymerized with diallyl terephthalate polymer to generate macromolecular compounds, so that the mechanical property of the optical resin monomer is improved.

Description

technical field [0001] The invention relates to the technical field of optical resins, in particular to a preparation method of optical resin monomers and a reaction system thereof. Background technique [0002] Optical resin monomer is the raw material for the preparation of lenses. It requires more than 90% light transmission, colorless and transparent, and has excellent cementing properties. It has the advantages of small shrinkage during curing and low temperature curing. However, The existing optical resin monomers have poor stamping resistance, which leads to the technical problems of difficult lens processing and molding, and difficult production. Contents of the invention [0003] The object of the present invention is to provide a preparation method of optical resin monomer and its reaction system, aiming to solve the problem of poor stamping resistance of optical resin monomer, which leads to difficult molding. [0004] The above-mentioned technical purpose of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F218/16C08F212/08C08F222/14C08F222/20
CPCC08F218/16C08F212/08C08F222/14C08F222/1006Y02P20/582
Inventor 周法现黄嘉诚
Owner 湖北巴乐福化工科技有限公司
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