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A kind of preparation method of optical resin monomer and its reaction system

An optical resin and monomer technology, applied in the field of preparation of optical resin monomers, can solve the problems of poor punching resistance of optical resin monomers, difficult molding, etc. area effect

Active Publication Date: 2022-06-03
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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  • A kind of preparation method of optical resin monomer and its reaction system
  • A kind of preparation method of optical resin monomer and its reaction system
  • A kind of preparation method of optical resin monomer and its reaction system

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A preparation method of an optical resin monomer is carried out according to the following steps:

[0040] S1: in parts by mass, 150 parts of dimethyl terephthalate, 320 parts of allyl alcohol, and 2 parts of calcium hydroxide were added to the glass reactor in turn, and nitrogen protection was introduced, and then the temperature was directly heated to 120° C., The reaction is carried out for 12-15h to obtain a reaction solution. After testing, the yield of the product is 78%. At the same time, a condensation reflux device is set on the glass reaction kettle to condense and reflux allyl alcohol, and the product methanol is recovered;

[0041] S2: transfer the reaction solution obtained in S1 into a vacuum distillation still, heat up to 140° C. for vacuum distillation for 6-10 hours, and the generated vapors are collected by the condensation device for the front fraction and the back fraction respectively;

[0042] S3: add 15 parts of propylene glycol and 2 parts of cal...

Embodiment 2

[0046] A preparation method of an optical resin monomer is carried out according to the following steps:

[0047] S1: in parts by mass, 140 parts of dimethyl terephthalate, 280 parts of allyl alcohol, and 1 part of calcium hydroxide were added to the glass reactor successively, and nitrogen protection was introduced, and then the temperature-programmed mode was adopted, The reaction is carried out for 12-15h to obtain a reaction solution. At the same time, a condensing and refluxing device is set on the glass reaction kettle to condense and reflux allyl alcohol, and the product methanol is recovered;

[0048] S2: transfer the reaction solution obtained in S1 into a vacuum distillation still, heat up to 140° C. for vacuum distillation for 6-10 hours, and the generated vapors are collected by the condensation device for the front fraction and the back fraction respectively;

[0049] S3: add 10 parts of the back fraction, 10 parts of propylene glycol and 1 part of calcium hydroxi...

Embodiment 3

[0054] A preparation method of an optical resin monomer is carried out according to the following steps:

[0055] S1: in parts by mass, 140 parts of dimethyl terephthalate, 280 parts of allyl alcohol, and 1 part of calcium hydroxide were added to the glass reactor successively, and nitrogen protection was introduced, and then the temperature-programmed mode was adopted, The reaction is carried out for 12-15h to obtain a reaction solution. At the same time, a condensing and refluxing device is set on the glass reaction kettle to condense and reflux allyl alcohol, and the product methanol is recovered;

[0056] S2: transfer the reaction solution obtained in S1 into a vacuum distillation still, heat up to 140° C. for vacuum distillation for 6-10 hours, and the generated vapors are collected by the condensation device for the front fraction and the back fraction respectively;

[0057] S3: add 1 part of the back fraction, 1 part of propylene glycol and 1-2 parts of calcium hydroxid...

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Abstract

The invention relates to the field of optical resin monomers, and discloses a preparation method of optical resin monomers and a reaction system thereof, which are carried out according to the following steps: S1, prepare diallyl terephthalate; S2, diene terephthalate Purification of propyl ester; S3, preparation of mixture I; S4, preparation of mixture II; S5, preparation of optical resin monomer; the present invention adds the mixture II to the optical resin monomer to increase the mechanical properties of the optical resin monomer, increase the hardness and Stamping resistance, which is convenient for later lens processing, secondly, the weather resistance and corrosion resistance of lenses made of optical resin monomers have been improved, and finally, the unsaturated double bonds in the polyester part of the mixture II provide the ability of free radical addition polymerization, It can be further polymerized with diallyl terephthalate polymer to generate macromolecular compounds and increase the mechanical properties of optical resin monomers.

Description

technical field [0001] The invention relates to the technical field of optical resins, in particular to a preparation method of an optical resin monomer and a reaction system thereof. Background technique [0002] Optical resin monomer is the raw material used to prepare lenses. Its requirements are light transmittance exceeding 90%, colorless and transparent, excellent bonding properties, small shrinkage during curing, and curing at lower temperatures. The existing optical resin monomers have the technical problems of poor stamping resistance, which leads to difficulties in the processing and molding of lenses and difficult production. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a preparation method of an optical resin monomer and a reaction system thereof, aiming at solving the problem of poor punching resistance of the optical resin monomer, which leads to difficulty in molding. [0004] The above-mentioned technical purpose of ...

Claims

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Application Information

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Patent Type & Authority Patents(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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