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A transparent thermoplastic polyurethane elastomer

A thermoplastic polyurethane and elastomer technology, applied in the field of thermoplastic elastomers, can solve problems such as improving the mechanical properties of materials, and achieve the effects of improving mechanical properties, superior comprehensive performance, and ensuring transparency

Active Publication Date: 2022-05-13
盛鼎高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no group in the structure of the chain extender that forms a hydrogen bond with polyurethane, so it is difficult to improve the mechanical properties of the material while ensuring the transparency of the elastomer

Method used

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  • A transparent thermoplastic polyurethane elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 105.1 g of diglycolamine was placed in a three-necked flask, and protective nitrogen gas was introduced below the liquid level. Under the condition of 10° C., 67.1 g of 1,1,3,3-tetramethyldisilane was slowly added dropwise within 1.0 hour. After the dropwise addition was completed, the reaction was continued at 10°C for 0.5 hours, then the temperature was raised to 70°C, and the reaction was continued with stirring for 1 hour to obtain 170.2g of 1,3-bis[2-(2-hydroxyethoxy)-ethylamino] Tetramethyldisiloxane.

Embodiment 2

[0022] 147.2g of diglycolamine was placed in a three-necked flask, and protective nitrogen gas was introduced below the liquid level. Under the condition of 5° C., 94.0 g of 1,1,3,3-tetramethyldisilane was slowly added dropwise within 2.5 hours. After the dropwise addition was completed, the reaction was continued at 5°C for 0.5 hours, then the temperature was raised to 73°C, and the reaction was continued with stirring for 1 hour to obtain 238.4g of 1,3-bis[2-(2-hydroxyethoxy)-ethylamino] Tetramethyldisiloxane.

Embodiment 3

[0024] Place 210.3g of diglycolamine in a three-necked flask, and insert protective nitrogen below the liquid level. Under the condition of -15°C, 134.3 g of 1,1,3,3-tetramethyldisilane was slowly added dropwise within 2.8 hours. After the dropwise addition was completed, the reaction was continued at -15°C for 0.5 hours, then the temperature was raised to 65°C, and the reaction was continued with stirring for 1 hour to obtain 340.6g of 1,3-bis[2-(2-hydroxyethoxy)-ethylamino ] Tetramethyldisiloxane.

[0025] Using the prepared finished product 1,3-bis[2-(2-hydroxyethoxy)-ethylamino]tetramethyldisiloxane as chain extender (marked as B), adopt twin-screw reactive extrusion process A thermoplastic elastomer was prepared, and the length-to-diameter ratio of the screw was 40:1. A thermoplastic elastomer was prepared using 1,3-bis(4-hydroxybutyl)tetramethylsiloxane as a chain extender as a comparative example. The specific formulation, extrusion process and properties of the prod...

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Abstract

The invention discloses a transparent thermoplastic polyurethane elastomer, belonging to the field of thermoplastic elastomers. The elastomer of the present invention adopts a novel chain extender, which is synthesized with diglycolamine and 1,1,3,3-tetramethyldisilane as raw materials, wherein diglycolamine and 1,1,3 , The molar ratio of 3-tetramethyldisilane is 2:1. The structure of the chain extender contains siloxane, amino and ether bonds at the same time. The chain extender of this structure can not only disrupt the regularity of polyurethane hard segments, ensure the transparency of elastomers, but also form hydrogen bonds Improve the mechanical properties of the material, so as to obtain a high-transparency thermoplastic polyurethane elastomer with excellent comprehensive properties.

Description

technical field [0001] The invention belongs to the field of thermoplastic elastomers, in particular to a transparent thermoplastic polyurethane elastomer. Background technique [0002] Optically transparent polymer materials refer to polymer materials with light transmittance above 80%. Optically transparent polymer materials are widely used. The most common transparent polymers are polycarbonate, polystyrene and polymethyl methacrylate. These several kinds of materials have high transparency, but they all have deficiencies in other performance aspects. For example, polycarbonate has low hardness, poor wear resistance and aging resistance; polystyrene has poor impact resistance, obvious low-temperature brittleness, and poor weather resistance; polymethyl methacrylate has general mechanical properties and poor impact resistance. With the expansion of the application of highly transparent polymer materials, transparent polyurethane materials have entered people's field of v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/38
CPCC08G18/6666C08G18/6633C08G18/4854C08G18/4238C08G18/425C08G18/3893
Inventor 王超申治华贾桓马晓峰罗艳龙罗振扬
Owner 盛鼎高新材料有限公司
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