High-temperature-resistant photochromic TPU film and preparation method thereof

A photochromic and high temperature resistant technology, applied in the field of polymer materials, can solve the problems of poor controllability of polymerization degree, difficult application, uncontrollable color change, etc., and achieve good physical properties, enhanced photosensitivity, and simple process effects

Inactive Publication Date: 2017-09-15
周远华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the present invention introduces photosensitive groups into the main chain of polyurethane, which is beneficial to the preparation of polyurethane films, it is difficult to control the photosensitive degree by changing the degree of polymerization and the ratio of polymerized monomers in combination with the main chain. Poor controllability, resulting in high uncontrollability of the polyurethane, difficult to apply
[0006] At the same time, the photochromic TPU film in the prior art can change color at room temperature, but the color is unstable under high temperature environment, and the color changes uncontrollably

Method used

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  • High-temperature-resistant photochromic TPU film and preparation method thereof
  • High-temperature-resistant photochromic TPU film and preparation method thereof
  • High-temperature-resistant photochromic TPU film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] A kind of preparation method of high temperature resistant photochromic TPU film, described method comprises the following steps:

[0045] (1) Add 70 parts of polyether polyol (number average molecular weight 3500) and 30 parts of 4,4'-diphenylmethane diisocyanate into the container in sequence, stir at a speed of 500r / min, and vacuumize at 50°C to -0.4kPa, get the prepolymer;

[0046] (2) Add 10 parts of chain extender and 1 part of catalyst in the formula amount to the prepolymer obtained in step (1), and continue to react at 70° C. for 2 hours;

[0047] (3) Add 6 parts of azobisisobutyronitrile to the reacted material in step (2), stir for 1h at a speed of 500r / min, then join in the twin-screw extruder, set the twin-screw extruder The temperature of the feeding section is 130°C, the temperature of the mixing section is 150°C, the temperature of the extrusion section is 170°C, and the temperature of the head section is 170°C. Extrusion molding obtains a high temperat...

Embodiment 2

[0049] A kind of preparation method of high temperature resistant photochromic TPU film, described method comprises the following steps:

[0050] (1) Add 86 parts of polyether polyol (number average molecular weight 3200) and 42 parts of 4,4'-diphenylmethane diisocyanate into the container in sequence, stir at a speed of 1000r / min, and vacuumize at 58°C to -0.35kPa, obtain prepolymer;

[0051] (2) Add 14 parts of chain extender and 2 parts of catalyst in the formula amount to the prepolymer obtained in step (1), and continue to react at 78°C for 3.5h;

[0052] (3) Add 5.5 parts of azobisisobutyronitrile to the reacted material in step (2), stir for 1.8h at a speed of 1000r / min, then add to the twin-screw extruder, set the twin-screw extruder The temperature of the feeding section of the machine is 138°C, the temperature of the mixing section is 158°C, the temperature of the extrusion section is 178°C, and the temperature of the head section is 178°C, and the high temperature ...

Embodiment 3

[0054] A kind of preparation method of high temperature resistant photochromic TPU film, described method comprises the following steps:

[0055] (1) Add 82 parts of polyether polyol (number average molecular weight 3800) and 38 parts of 4,4'-diphenylmethane diisocyanate into the container in sequence, stir at a speed of 900r / min, and vacuumize at 55°C to -0.3kPa, get the prepolymer;

[0056] (2) Add 13 parts of chain extender and 3 parts of catalyst in the formula amount to the prepolymer obtained in step (1), and continue to react at 75° C. for 3 h;

[0057] (3) Add 5 parts of azobisisobutyronitrile to the reacted material in step (2), stir for 1.5h at a speed of 900r / min, then join in the twin-screw extruder, set the twin-screw extruder The temperature of the feeding section of the machine is 135°C, the temperature of the mixing section is 155°C, the temperature of the extrusion section is 175°C, and the temperature of the head section is 175°C, and the high temperature re...

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Abstract

The invention relates to a high-temperature-resistant photochromic TPU film. The high-temperature-resistant photochromic TPU film is characterized in that raw materials for the film include 4,4'-diphenylmethane diisocyanate, polyether polyol, a chain extender, azodiisobutyronitrile and a catalyst, wherein a mass ratio of 4,4'-diphenylmethane diisocyanate to azodiisobutyronitrile is (5-15): 1. The high-temperature-resistant photochromic TPU film has high photosensitivity and good physical properties and does not vary in color at a high temperature; and the preparation method for the TPU film is simple in process and applicable to industrial production.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a high-temperature-resistant photochromic TPU film and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane (TPU) is a new type of organic polymer synthetic material with excellent properties and can replace rubber and soft polyvinyl chloride material PVC. TPU has excellent physical properties, such as wear resistance and resilience, which are better than ordinary polyurethane and PVC, and aging resistance is better than rubber. It can be said to be the most ideal material to replace PVC and PU. [0003] Photochromic articles, especially photochromic plastic materials for optical applications, have been the subject of intense interest. In particular, photochromic ophthalmic plexiglass lenses have gained commercial favor due to their weight advantages and impact resistance compared to ordinary glass lenses. In addition, photochromic tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08G18/10C08L75/08C08K5/315B29C47/92B29C48/92
CPCC08G18/7671B29C48/92B29C2948/92704C08G18/10C08G18/3206C08G18/48C08G18/6674C08J5/18C08J2375/08C08K5/315C08L2201/08C08L2203/16C08L75/08
Inventor 周远华
Owner 周远华
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