Polyurethane photochromic lens and preparation method thereof

A color-changing lens, polyurethane technology, applied in glasses/goggles, instruments, optics, etc., to achieve the effect of excellent mechanical properties

Inactive Publication Date: 2019-02-22
苏新智能标签(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the development of society, there are certain differences in the requirements for optical plasti

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of polyurethane photochromic lens, raw material comprises by weight: 2 parts of polyester diol, 1 part of isophorone diisocyanate, 2 parts of 2,2-dimethylol propionic acid, 8 parts of methyl methacrylate, 5 parts of styrene, 0.5 part of initiator, 0.8 part of glycerol, 0.5 part of 3-mercaptopropionic acid, 3 parts of toluene, 0.5 part of p-toluenesulfonic acid, 0.3 part of photochromic material, and 0.1 part of UV absorber.

[0017] Wherein, the initiator is azobisisoheptanonitrile.

[0018] The photochromic material is spiropyran.

[0019] The UV absorbers are benzophenones.

[0020] The preparation method of the above-mentioned polyurethane photochromic lens comprises the following steps:

[0021] Step 1, mixing glycerol, 3-mercaptopropionic acid, toluene, and p-toluenesulfonic acid, reflux reaction at 110°C for 2 hours, and obtaining a curing agent by distillation under reduced pressure;

[0022] Step 2: Add polyester diol, isophorone diisocyanate, and 2,2-...

Embodiment 2

[0026] A polyurethane photochromic lens, the raw materials include in parts by weight: 4 parts of polyester diol, 2 parts of isophorone diisocyanate, 3 parts of 2,2-dimethylol propionic acid, 10 parts of methyl methacrylate, 7 parts of styrene, 0.7 parts of initiator, 1.2 parts of glycerol, 0.9 part of 3-mercaptopropionic acid, 5 parts of toluene, 0.8 part of p-toluenesulfonic acid, 0.5 part of photochromic material, and 0.2 part of UV absorber.

[0027] Wherein, the initiator is azobisisoheptanonitrile.

[0028] The photochromic material is spirooxazines.

[0029] The UV absorber is benzotriazoles.

[0030] The preparation method of the above-mentioned polyurethane photochromic lens comprises the following steps:

[0031] Step 1: Mix glycerol, 3-mercaptopropionic acid, toluene, and p-toluenesulfonic acid, reflux at 110°C for 1 hour, and obtain a curing agent by distillation under reduced pressure;

[0032] Step 2: Add polyester diol, isophorone diisocyanate, and 2,2-dimeth...

Embodiment 3

[0036] A kind of polyurethane photochromic lens, the raw material comprises by weight: 6 parts of polyester diol, 4 parts of isophorone diisocyanate, 5 parts of 2,2-dimethylol propionic acid, 12 parts of methyl methacrylate, 10 parts of styrene, 1 part of initiator, 1.5 parts of glycerol, 1.2 parts of 3-mercaptopropionic acid, 7 parts of toluene, 1 part of p-toluenesulfonic acid, 0.6 parts of photochromic material, and 0.3 parts of UV absorber.

[0037] Wherein, the initiator is azobisisoheptanonitrile.

[0038] The photochromic material is spiropyran.

[0039] The UV absorbers are benzophenones.

[0040] The preparation method of the above-mentioned polyurethane photochromic lens comprises the following steps:

[0041] Step 1: Mix glycerol, 3-mercaptopropionic acid, toluene, and p-toluenesulfonic acid, reflux at 120°C for 1 hour, and obtain a curing agent by distillation under reduced pressure;

[0042] Step 2: Add polyester diol, isophorone diisocyanate, and 2,2-dimethylo...

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Abstract

The invention discloses a polyurethane photochromic lens and a preparation method thereof. The lens comprises the raw materials: polyester diol, isophorone diisocyanate, 2,2-dimethylol propionic acid,methyl methacrylate, styrene, an initiator, glycerol, 3-mercaptopropionic acid, methylbenzene, p-toluenesulfonic acid, a photochromic material and a UV adsorbent. The preparation method comprises thesteps: firstly, mixing glycerol, 3-mercaptopropionic acid, methylbenzene and p-toluenesulfonic acid to carry out a reaction to prepare a curing agent; then, adding polyester diol, isophorone diisocyanate and 2,2-dimethylol propionic acid into a mixed solution of methyl methacrylate and styrene, carrying out mixing, then, adding the curing agent, the photochromic material and the UV adsorbent, andcarrying out stirring to prepare mixed slurry; and pouring the mixed slurry into a die, and placing the die into an air curing furnace to carry out primary curing and secondary curing to obtain the polyurethane photochromic lens. The prepared lens has excellent photochromic and mechanical properties and can be widely applied.

Description

technical field [0001] The invention belongs to the technical field of resin lenses, and in particular relates to a polyurethane photochromic lens and a preparation method thereof. Background technique [0002] Photochromic lenses refer to optical lenses that become darker when exposed to ultraviolet light, also known as photochromic lenses. According to relevant surveys, more than 90% of skin cancers related to ultraviolet radiation occur in the area above the neck. Excessive exposure to ultraviolet rays in the eyelids and skin around the eyes may lead to cancer. In addition to skin cancer, UV radiation can increase the risk of various eye problems such as cataracts and macular degeneration, and can cause damage to the immune system. Therefore, it is of practical significance to make photochromic lenses from synthetic photochromic materials and to promote them in large quantities. [0003] With the development of society, there are certain differences in the requirements ...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/14C08F212/08C08G18/75C08G18/66C08G18/42C08G18/34C08G18/32G02C7/10
CPCC08F283/006C08G18/3206C08G18/348C08G18/6659C08G18/755G02C7/102C08F220/14
Inventor 曹天中
Owner 苏新智能标签(江苏)有限公司
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