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Unsaturated polyester polyurethane nano silicon dioxide material and preparation method thereof

A technology of nano-silica and polyester polyurethane is applied in the field of preparation of unsaturated polyester-polyurethane nano-silica materials, which can solve the problems of complex process and the like

Inactive Publication Date: 2013-09-25
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Patent CN102212242A discloses a preparation method of unsaturated polyester-polyurethane block copolymer composite material. This technology adopts impregnation method to soften glass fiber and unsaturated polyester-polyurethane resin to make composite material. The process is relatively complicated.

Method used

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  • Unsaturated polyester polyurethane nano silicon dioxide material and preparation method thereof

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preparation example Construction

[0023] The preparation steps of unsaturated polyester polyurethane resin are as follows: Weigh the unsaturated polyester resin in the recipe amount into a 250ml three-neck flask, then add the recipe amount of polyethylene glycol, 2,4-toluene diisocyanate (TDI), Styrene, hydroquinone and catalyst dibutyltin dilaurate. Finally put it in a water bath and heat it, keeping the temperature at 80°C. After reacting for 1 h, use a certain concentration of dibutylamine-toluene solution and HCL-H 2 O solution was used to calibrate the content of NCO, which was measured every 30 minutes. When the content of NCO is basically unchanged, stop heating and discharge.

[0024] The preparation steps of modified silica are as follows: batching according to the formula, adding nano-silica to the solvent, first ultrasonically dispersing for 2 hours, and then adding the prepared KH560 solution (72% of anhydrous ethanol and 8% of distilled water) , ultrasound 2h can be.

[0025] The prepa...

Embodiment 1

[0027] Embodiment 1. The preparation of unsaturated polyester polyurethane resin

[0028] Weigh 85g of unsaturated polyester resin, 12.8g of polyethylene glycol, 4.7g of TDI, then add 8.5g of styrene, 0.039g of hydroquinone and 3 drops of dibutyltin dilaurate. These substances were added into a three-necked flask, heated in a water bath, and kept at a temperature of 60°C. After reacting for 1 h, use dibutylamine-toluene solution and HCl-H 2 O solution to calibrate the content of NCO, the method is as follows: take about 1g of sample, add 10ml of dibutylamine-toluene solution, leave it at room temperature for 20min, then add 50ml of industrial alcohol, add 3 to 4 drops of 1% bromocresol green indicator, Titrate with 0.5mol / L HCl-H2O standard solution, and do a blank experiment at the same time, the solution turns from blue to yellow-green as the end point. Measured every 30 minutes thereafter. When the content of NCO is basically unchanged, stop heating and discharge.

Embodiment 2

[0029] Embodiment 2. Unsaturated polyester polyurethane nano-silica material and its preparation

[0030] Based on 20g of unsaturated polyester polyurethane, weigh 0.24g of nano-silica, add 6g of solvent acetone, ultrasonically disperse for 2 hours, and then add the prepared KH560 solution (72% of anhydrous ethanol and 8% of distilled water), Ultrasonic dispersion for 2 hours, finally adding unsaturated polyester polyurethane resin, ultrasonic dispersion for 4 hours while stirring mechanically, removing the solvent by distillation under reduced pressure, adding 0.26g initiator methyl ethyl ketone peroxide, 0.05g accelerator cobalt naphthenate and 0.26g defoamer Methyl silicone oil, the product can be obtained by casting after stirring.

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Abstract

The invention relates to an unsaturated polyester polyurethane nano silicon dioxide material and a preparation method thereof. The unsaturated polyester polyurethane nano silicon dioxide material comprises the following components in percentage by mass: 63.5-82.6% of unsaturated polyester polyurethane resin, 1-2.5% of modified nano silicon dioxide, 1-1.2% of initiator, 0.2-0.25% of accelerator, 1-1.5% of defoaming agent and 12-20% of solvent. The preparation method comprises the following steps: adding 1-2.5% of nano silicon dioxide into the formula amount of solvent, dispersing by ultrasonic mechanical stirring for 2 hours, adding the prepared silane coupling agent KH-560, dispersing by ultrasonic mechanical stirring for 2 hours, adding the unsaturated polyester polyurethane resin, dispersing by ultrasonic mechanical stirring for 4 hours, carrying out reduced pressure distillation to remove the solvent, adding the initiator, accelerator and defoaming agent, and casting to obtain the product.

Description

technical field [0001] The invention relates to the preparation technology of unsaturated polyester polyurethane nano silicon dioxide material. Background technique [0002] The application of unsaturated polyester polyurethane has been extended to various departments, and various molding processing methods are becoming more and more mature, and different requirements are put forward for the performance of the resin, which promotes the continuous increase of resin varieties and the gradual improvement of performance. However, unsaturated polyester polyurethane also has its own shortcomings. Unsaturated polyester polyurethane resin is hard and brittle after curing, has poor impact performance, and the surface is easy to crack; the wear resistance is also poor, and its practical application is greatly limited. Therefore, it is necessary to improve the impact resistance, wear resistance, hardness, strength, heat resistance, water resistance, flame retardancy and other propertie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08G18/68C08G63/52
Inventor 郭军红魏小赟杨保平崔锦峰周应萍李敏睿包雪梅陈碧碧崔卓常婕赵秋萍张皓钧
Owner LANZHOU UNIVERSITY OF TECHNOLOGY