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A highly transparent and easy-to-process bi-sio 2 /tpu preparation method

An easy-to-process, bi-sio2 technology, applied in the field of thermoplastic elastomers, can solve the problems of limited application scope and lack of flexibility of glass, and achieve the effect of improving steric hindrance and preventing aggregation

Active Publication Date: 2022-04-19
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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  • A highly transparent and easy-to-process bi-sio <sub>2</sub> /tpu preparation method
  • A highly transparent and easy-to-process bi-sio <sub>2</sub> /tpu preparation method
  • A highly transparent and easy-to-process bi-sio <sub>2</sub> /tpu preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A highly transparent BI-SiO that is easy to process and mold 2 Preparation method of / TPU, the raw materials in terms of the number of parts by weight include: polytetrahydrofuran 52.75 parts, 1,4-butanediol 9.0 parts, diphenylmethane diisocyanate 38.25 parts, nucleating agent BI-SiO 2 0.1 serving.

[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, a hydroxyl value of 1000 ~ 1200mg KOH / g.

[0039] The BI-SiO 2 Preparation: 5-10 4A type molecular sieves were placed in a vacuum oven at 120 °C for 12 h, and the activated 4A type molecular sieves were added to the 20 ml N-methylpyrrolidone sealed for 24 h to remove the moisture in N-methylpyrrolidone. 0.5-1.0g nano silica was baked at 120 °C in a vacuum oven for 5 h to remove the moisture adsorbed on the surface to obtain activated SiO 2 。 At room temperature, the baked nano-silica weighed 0.5g dispers...

Embodiment 2

[0047] A highly transparent BI-SiO that is easy to process and mold 2 Preparation method of / TPU, the raw materials in terms of the number of parts by weight include: polytetrahydrofuran 52.75 parts, 1,4-butanediol 9.0 parts, diphenylmethane diisocyanate 38.25 parts, nucleating agent BI-SiO 2 0.2 servings.

[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, a hydroxyl value of 1000 ~ 1200mg KOH / g.

[0050] The BI-SiO 2 Preparation: 5-10 4A type molecular sieves were placed in a vacuum oven at 120 °C for 12 h, and the activated 4A type molecular sieves were added to the 20 ml N-methylpyrrolidone sealed for 24 h to remove the moisture in N-methylpyrrolidone. 0.5-1.0g nano silica was baked at 120 °C in a vacuum oven for 5 h to remove the moisture adsorbed on the surface to obtain activated SiO 2 。 At room temperature, the baked nano-silica weighed 0.5g disper...

Embodiment 3

[0058] A highly transparent BI-SiO that is easy to process and mold 2 Preparation method of / TPU, the raw materials in terms of the number of parts by weight include: polytetrahydrofuran 52.75 parts, 1,4-butanediol 9.0 parts, diphenylmethane diisocyanate 38.25 parts, nucleating agent BI-SiO 2 0.3 servings.

[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, a hydroxyl value of 1000 ~ 1200mg KOH / g.

[0061] The BI-SiO 2 Preparation: 5-10 4A type molecular sieves were placed in a vacuum oven at 120 °C for 12 h, and the activated 4A type molecular sieves were added to the 20 ml N-methylpyrrolidone sealed for 24 h to remove the moisture in N-methylpyrrolidone. 0.5-1.0g nano silica was baked at 120 °C in a vacuum oven for 5 h to remove the moisture adsorbed on the surface to obtain activated SiO 2 。 At room temperature, the baked nano-silica weighed 0.5g disper...

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Abstract

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. The present invention adds nucleating agent BI-SiO in thermoplastic polyurethane elastomer matrix 2 , BI-SiO 2 The function is to provide heterogeneous nucleation points, which act as crystal nuclei in the resin, so that the original homogeneous nucleation becomes heterogeneous nucleation, increasing the number of crystal nuclei in the crystal system, increasing the number of microcrystals, and spherical The reduction in the number of crystals will make the crystal size of TPU thinner, increase the light transmittance, and the crystallization speed and crystallization temperature will increase accordingly, so that the polymer processing and molding time will be shortened and the molding will be faster. And improve the transparency and formability of TPU without reducing its mechanical properties.

Description

Technical field [0001] The present invention belongs to the field of thermoplastic elastomers, specifically relates to a highly permeable and easy to process and mold BI-SiO 2 / TPU preparation method and application. Background [0002] In the field of materials, the requirements for the transparency of materials are becoming more and more extensive, the demand is increasing, and the requirements for performance and versatility are also getting higher and higher. Such as our current commonly used transparent mobile phone cases, transparent computer keyboard protective film, and some applications in the field of transparency. The advantage of transparent materials is that they can add their own matching color fillers in post-processing to increase the user experience. The traditional transparent material is glass, but the glass has no flexibility, the scope of application is limited, thermoplastic polyurethane elastomer has both the elasticity of rubber and the hardness of plasti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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