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

AI Technical Summary

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 triol. The synthesis method is simple, the production cycle is short, the cost of raw materials is low, and it is easy to obtain. Solved the time-consuming problem of purchasing abroad

Method used

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  • Thermoplastic polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, 60-65 parts by weight of isocyanate, 5-7.5 parts by weight of dihydric alcohol, 0.5 parts by weight of antioxidant, 1 part by weight of ultraviolet absorber and 1 part by weight of A catalyst with a number of 0.0005 is added into the first reactor for reaction to form a first mixture, and the temperature in the first reactor is maintained between 110°C and 120°C, preferably 120°C. And vacuumize the inside of the first reaction kettle, so that the vacuum degree in the first reaction kettle is -0.08-0.1Mpa. In this step, because the mixing reaction will release a lot of heat, the temperature in the first reaction tank will exceed 120°C, so after the reaction is completed and the first mixture is formed, the temperature in the first reaction tank will be lowered to 120°C Continue to use the next steps.

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

Embodiment 2

[0027] In Example 2, different from Example 1, the weight fraction of dihydric alcohol added to the first reactor is changed from 5-7.5 to 10-12.5 and the weight of trihydric alcohol added to the second reactor The number of parts is changed from 20-25 to 10-15, and accordingly, the optimal conditions for preparing thermoplastic polyurethane are found.

[0028] First, 60-65 parts by weight of isocyanate, 10-12.5 parts by weight of dihydric alcohol, 0.5 parts by weight of antioxidant, 1 part by weight of ultraviolet absorber, and 1 part by weight of A catalyst with a number of 0.0005 is added into the first reactor for mixing and reacting to form a first mixture, and the temperature in the first reactor is maintained between 110°C and 120°C, preferably 120°C. And vacuumize the inside of the first reactor, so that the vacuum degree in the first reactor is -0.08-0.1 Mpa. In this step, because the mixing reaction will release a lot of heat, the temperature in the first reaction tan...

Embodiment 3

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

[0037] First, 60-65 parts by weight of isocyanate, 7.5-10 parts by weight of dihydric alcohol, 0.5 parts by weight of antioxidant, 1 part by weight of ultraviolet absorber, 1 part by weight of A catalyst with a number of 0.0005 is added into the first reactor for mixing and reacting to form a first mixture, and the temperature in the first reactor is maintained between 110°C and 120°C, preferably 120°C. And carry out vacuumizing in the first reactor, make the vacuum degree in the first reactor be-0.08-0.1Mpa, same in this mixing step, because the m...

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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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