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Preparation method of BI-SiO2/TPU with high transparency and easy processing molding

An easy-to-process, bi-sio2 technology, applied in the field of thermoplastic elastomers, can solve the problems of glass without flexibility and limited application range

Active Publication Date: 2021-06-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional transparent material is glass, but glass has no flexibility and its application range is limited. Thermoplastic polyurethane elastomer has both the elasticity of rubber and the hardness of plastic, and its excellent mechanical properties and mechanical properties can replace glass as a transparent material, making up for Glass has poor elasticity and is fragile

Method used

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  • Preparation method of BI-SiO2/TPU with high transparency and easy processing molding
  • Preparation method of BI-SiO2/TPU with high transparency and easy processing molding
  • Preparation method of BI-SiO2/TPU with high transparency and easy processing molding

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A kind of BI-SiO with high transparency and easy processing 2 / The preparation method of TPU, its raw material includes by weight: 52.75 parts of polytetrahydrofuran, 9.0 parts of 1,4-butanediol, 38.25 parts of diphenylmethane diisocyanate, nucleating agent BI-SiO 2 0.1 part.

[0037] The molecular weight of the polytetrahydrofuran is between 1024-1056.

[0038]The 1,4-butanediol is a colorless viscous oily liquid with a molecular weight of 90.12 and a hydroxyl value of 1000-1200 mg KOH / g.

[0039] The BI-SiO 2 Preparation: 5-10 grains of 4A molecular sieves were activated in a vacuum oven at 120°C for 12 hours, and the activated 4A molecular sieves were added with 20ml of N-methylpyrrolidone and sealed for 24 hours to remove the moisture in the N-methylpyrrolidone. Dry 0.5-1.0g of nano silicon dioxide in a vacuum oven at 120°C for 5 hours to remove the moisture adsorbed on the surface and obtain activated SiO 2 . At room temperature, weigh 0.5g of baked nano-sili...

Embodiment 2

[0047] A kind of BI-SiO with high transparency and easy processing 2 / The preparation method of TPU, its raw material includes by weight: 52.75 parts of polytetrahydrofuran, 9.0 parts of 1,4-butanediol, 38.25 parts of diphenylmethane diisocyanate, nucleating agent BI-SiO 2 0.2 parts.

[0048] The molecular weight of the polytetrahydrofuran is between 1024-1056.

[0049] The 1,4-butanediol is a colorless viscous oily liquid with a molecular weight of 90.12 and a hydroxyl value of 1000-1200 mg KOH / g.

[0050] The BI-SiO 2 Preparation: 5-10 grains of 4A molecular sieves were activated in a vacuum oven at 120°C for 12 hours, and the activated 4A molecular sieves were added with 20ml of N-methylpyrrolidone and sealed for 24 hours to remove the moisture in the N-methylpyrrolidone. Dry 0.5-1.0g of nano silicon dioxide in a vacuum oven at 120°C for 5 hours to remove the moisture adsorbed on the surface and obtain activated SiO 2 . At room temperature, weigh 0.5g of baked nano-si...

Embodiment 3

[0058] A kind of BI-SiO with high transparency and easy processing 2 / The preparation method of TPU, its raw material includes by weight: 52.75 parts of polytetrahydrofuran, 9.0 parts of 1,4-butanediol, 38.25 parts of diphenylmethane diisocyanate, nucleating agent BI-SiO 2 0.3 parts.

[0059] The molecular weight of the polytetrahydrofuran is between 1024-1056.

[0060] The 1,4-butanediol is a colorless viscous oily liquid with a molecular weight of 90.12 and a hydroxyl value of 1000-1200 mg KOH / g.

[0061] The BI-SiO 2 Preparation: 5-10 grains of 4A molecular sieves were activated in a vacuum oven at 120°C for 12 hours, and the activated 4A molecular sieves were added with 20ml of N-methylpyrrolidone and sealed for 24 hours to remove the moisture in the N-methylpyrrolidone. Dry 0.5-1.0g of nano silicon dioxide in a vacuum oven at 120°C for 5 hours to remove the moisture adsorbed on the surface and obtain activated SiO 2 . At room temperature, weigh 0.5g of baked nano-si...

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Abstract

The invention belongs to the field of thermoplastic elastomers, and particularly relates to a preparation method and application of BI-SiO2 / TPU with high transparency and easy processing molding. A nucleating agent BI-SiO2 is added into a thermoplastic polyurethane elastomer matrix, and the BI-SiO2 has the effects of providing heterogeneous nucleation points and playing a crystal nucleus role in resin, so that original homogeneous nucleation is changed into heterogeneous nucleation, the number of the crystal nucleus in a crystallization system is increased, the number of microcrystals is increased, the number of spherocrystals is reduced, the size of TPU crystals is reduced, the light transmittance is increased, the crystallization speed and the crystallization temperature are correspondingly increased, the polymer processing and forming time is shortened, and the forming speed is increased. The transparency and formability of the TPU are improved while the mechanical property of the TPU is not reduced.

Description

technical field [0001] The invention belongs to the field of thermoplastic elastomers, in particular to a highly transparent and easy-to-process BI-SiO 2 / TPU preparation method and application. Background technique [0002] In the field of materials, there are more and more requirements for the transparency of materials, and the requirements for performance and multi-functionality are also getting higher and higher. Such as our commonly used transparent mobile phone case, transparent computer keyboard protective film, and some applications in the transparent field. The advantage of transparent materials is that you can add your own matching color fillers in post-processing to increase user experience. The traditional transparent material is glass, but glass has no flexibility and its application range is limited. Thermoplastic polyurethane elastomer has both the elasticity of rubber and the hardness of plastic, and its excellent mechanical properties and mechanical proper...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G18/08C08K9/04C08K3/36
CPCC08G18/6674C08G18/4854C08G18/3206C08G18/08C08K9/04C08K3/36C08K2201/011
Inventor 郑玉婴陈玉环
Owner FUZHOU UNIV
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