Thermoplastic polyurethane and preparation method thereof

A thermoplastic polyurethane and isocyanate technology, applied in the field of polyurethane synthesis, can solve time-consuming problems, achieve cost reduction, excellent material performance, and promote development

Inactive Publication Date: 2019-02-22
JIANGSU IRON ANCHOR GLASS LTD BY SHARE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Another object of the present invention is to synthesize thermoplastic polyurethane by pre-polymerizing the main components of thermoplastic polyurethane, isocyanate, diol and t

Method used

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  • Thermoplastic polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example one:

[0023] First, 60-65 parts by weight of isocyanates, 5-7.5 parts by weight of diols, 0.5 parts by weight of antioxidants, 1 parts by weight of UV absorbers, and parts by weight A catalyst with a number of 0.0005 is added into the first reaction vessel to react and form a first mixture, and the temperature in the first reaction vessel is maintained between 110°C and 120°C, and the preferred temperature is 120°C. In addition, the inside of the first reactor is evacuated so that the vacuum degree in the first reactor is -0.08-0.1Mpa. In this step, since the mixing reaction will release a lot of heat, the temperature in the first reactor will exceed 120°C. Therefore, after the reaction is completed to form the first mixture, the temperature in the first reactor is lowered to 120°C. Then continue to use the next steps.

[0024] Then, add the remaining 5-7.5 parts by weight of the diol and 20-25 parts by weight of the triol into the second reactor, heat and stir to...

Example Embodiment

[0026] Example two:

[0027] In the second embodiment, the difference from the first embodiment is that the weight of the glycol added to the first reactor is changed from 5-7.5 to 10-12.5 and the weight of the triol added to the second reactor The number of parts was changed from 20-25 to 10-15, based on this, to find the best conditions for preparing thermoplastic polyurethane.

[0028] First, 60-65 parts by weight of isocyanate, 10-12.5 parts by weight of diol, 0.5 parts by weight of antioxidant, 1 part by weight of ultraviolet absorber, and parts by weight A catalyst with a number of 0.0005 is added to the first reaction vessel to mix and react to form a first mixture, and the temperature in the first reaction vessel is maintained between 110°C and 120°C, and the preferred temperature is 120°C. And the vacuum in the first reaction vessel is evacuated so that the vacuum degree in the first reaction vessel is -0.08-0.1 Mpa. In this step, since the mixing reaction will release a...

Example Embodiment

[0035] Example three:

[0036] In Example 3, the difference from Example 1 and Example 2 is that the weight of the glycol added to the first reactor is changed to 7.5-10 and the weight of the triol added to the second reactor The number of parts is 15-20. Similarly, the purpose of adjusting the parts by weight of diols and triols is to find the best conditions for preparing thermoplastic polyurethane.

[0037] First, 60-65 parts by weight of isocyanate, 7.5-10 parts by weight of diol, 0.5 parts by weight of antioxidant, 1 part by weight of ultraviolet absorber, and parts by weight A catalyst with a number of 0.0005 is added to the first reaction vessel to mix and react to form a first mixture, and the temperature in the first reaction vessel is maintained between 110°C and 120°C, and the preferred temperature is 120°C. And evacuate the first reaction kettle to make the vacuum degree in the first reaction kettle -0.08—0.1Mpa. Similarly, in this mixing step, due to the mixing reacti...

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Abstract

The invention discloses thermoplastic polyurethane. The thermoplastic polyurethane is characterized by being prepared from the following components in parts by weight: 60-65 parts of isocyanate, 10-25parts of dihydric alcohol, 10-25 parts of triatomic alcohol, 0.0005 part of a catalyst, 0.5 part of antioxidant and 1 part of an ultraviolet absorbent. According to the thermoplastic polyurethane, the synthesizing method is simple, the preparation cycle is short, the raw materials have low cost and are easily available, the thermoplastic polyurethane can endure deep sea pressure, have corrosion resistance and excellent environmental resistance, and the structure of the material can meet the safety standard of observation windows of deep sea submersible vehicles.

Description

technical field [0001] The invention relates to a synthetic method of polyurethane, more specifically relates to a thermoplastic polyurethane with environmental resistance synthesized by a pre-polymerization method and applied to a deep-sea observation window. Background technique [0002] The deep-sea submersible is used as an ocean vehicle for exploration and development, and one of its key technologies is the design and development of large-depth pressure-resistant structures. The manned submersible observation window is the main way for scientists and engineers to directly observe the deep ring environment. However, the manned submersible is the most important barrier to protect the safety of the submersible, regardless of the shape, wall thickness, hardness and corrosion resistance of the cabin, all must be considered. One of the core components of manned submersibles is the observation window. In order to achieve the purpose of pressure resistance, the current pressur...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/42C08G18/44C08G18/32C08G18/08
CPCC08G18/08C08G18/3206C08G18/42C08G18/44C08G18/48C08G18/4829
Inventor 吴贲华高国忠袁厚呈孙钰晶肖维龙张素梅
Owner JIANGSU IRON ANCHOR GLASS LTD BY SHARE LTD
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