Elastic shape memory polyurethane

A polyurethane and memory technology, applied in the textile field, can solve the problems that product performance cannot be guaranteed, and achieve the effect of high tensile strength and shape recovery rate

Inactive Publication Date: 2013-03-20
上海馨源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A special catalyst is necessary to obtain these characteristics. The nano-TiO2 commonly used is a good choice because of its extremely high specific surface area, but if the nano-TiO2 catalyst on the market is used directly, the performance of the obtained product cannot be guaranteed.

Method used

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Examples

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Embodiment Construction

[0008] The technical solutions of the present invention will be described in detail below in conjunction with the examples, but the protection scope of the present invention is not limited to the examples.

[0009] Slowly pour nano titanium dioxide powder (purchased from Hangzhou Wanjing New Material Co., Ltd.) into pure water to prepare a 50g / L titanium dioxide suspension, adjust the pH to 4.0 with acetic acid, and then stir and disperse at high speed under the action of ultrasonic waves for 30 minutes. Then, 10g / L of KH550 (3-aminopropyltriethoxysilane) was stirred evenly and then heated to 80°C for 3h reaction; then the reaction product was filtered and washed 3 times with deionized water, and dried at 100°C for 12h , and finally the resulting product is crushed into fine powder particles with a pulverizer to obtain a modified nano-silica catalyst; then the obtained modified titanium dioxide catalyst is mixed with N,N dimethylacetamide, and dispersed under the action of ultr...

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Abstract

The invention discloses elastic shape memory polyurethane, which is prepared through the following steps of: adjusting pH of 50g / L titanium dioxide nanosuspension to be 4.5 by using acetic acid and then ultrasonically dispersing for 30 minutes; adding 10g / L KH550 and heating to 80 DEG C to react for 3 hours; and finally, filtering a reaction product, washing with de-ionized water and then drying, and then crushing into fine grains to obtain modified titanium dioxide catalyst; and b, mixing the obtained modified titanium dioxide catalyst and DMAC (Dimethyl Acetylamide) and then dispersing under the action of ultrasonic wave to obtain catalyst suspension; adding ethyl acetate and MDI (Diphenyl-Methane-Diisocyanate) into a reaction kettle filled with nitrogen gas, heating to 40-50 DEG C, and adding a small amount of sodium methoxide and the catalyst suspension obtained by the step b after full dissolution; then slowly adding TMP (Trimethoprim); reacting at the temperature of 75 DEG C for 3-4 hours; and adding a small amount of phosphoric acid. The elastic shape memory polyurethane has high tensile strength and shape recovery rate.

Description

technical field [0001] The invention belongs to the field of textiles, in particular to the application of finishing agents in textiles. Background technique [0002] Polyurethane has a wide range of uses because of its good mechanical properties, toughness, wear resistance, plumpness, and brightness, and can be cured at low temperature. Elastic shape memory polyurethane has high resilience, good shock resistance, and adaptability. Ordinary polyurethane is widely used in the field of biomedicine because of its wear resistance, oil resistance, ozone resistance, and water resistance. At the same time, high waterproof and moisture-permeable fabrics can be obtained in textile applications. A special catalyst is required to obtain these characteristics. The nano-TiO2 commonly used is a good choice due to its extremely high specific surface area. However, if the nano-TiO2 catalyst on the market is used directly, the performance of the obtained product cannot be guaranteed. Conte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/32C08G18/22D06M15/564
Inventor 钱华张林荣
Owner 上海馨源新材料科技有限公司
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