Polyurethane foam material, preparation method and uses thereof

A polyurethane foam and urethane technology, which is applied in the field of polyurethane foam materials and their preparation, can solve the problems of inability to take into account the air permeability, permanent compression deformation and density of polyurethane foam materials, increase in permanent compression deformation of materials, and low density air permeability.

Active Publication Date: 2017-05-10
WANHUA CHEM BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese published patent CN101864164B discloses a production method of polyurethane insole material. The invention does not limit the type, molecular weight and functionality of polyether. Although the polyurethane material prepared according to this method has lower density and better air permeability , but in this case the permanent compression set of the material will increase
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Method used

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  • Polyurethane foam material, preparation method and uses thereof

Examples

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preparation example Construction

[0082] Preparation of Isocynate1: Add 550g of diphenylmethane diisocyanate into a three-necked flask equipped with a stirrer, a thermometer, and a nitrogen tube, heat it to 60-70°C, and then add Polyol8, Polyol9, and Polyol10. The added masses are 15g, 20g and 215g. Raise the temperature to 80°C, stir at a speed of 50 rpm for 2 hours, adjust the temperature of the stirred product to 40°C, add 200 g of carbodiimide-modified isocyanate, and stir for 0.5 hours to obtain Isocynate1, the NCO of Isocynate1 The content is controlled at 19.9-20.9wt%, and the viscosity is 650mPa·s;

[0083] Preparation of Isocynate2: Add 500g of diphenylmethane diisocyanate into a three-necked flask equipped with a stirrer, a thermometer, and a nitrogen tube, heat it to 60-70°C, and then add Polyol8, Polyol10, and Polyol12. The added masses are 20g, 105g and 105g. Raise the temperature to 80°C, stir at a speed of 100 rpm for 2 hours, adjust the temperature of the stirred product to 50°C, add 270g of ...

Embodiment 1

[0088] At room temperature, put the raw materials of component A into the reaction kettle one by one, and stir for 10 minutes with a high-speed shear mixer at a stirring speed of 1500 rpm. The temperature of the components and Isocynate2 is up to 22°C, put the A component and Isocynate2 into a box foam machine and stir for 22 seconds, pour into a mold at 35°C, and open the mold after aging for 20 minutes to obtain the polyurethane foam of the present invention ; After placing the polyurethane foam at room temperature for 30 hours, test the mechanical properties.

Embodiment 2

[0090] At room temperature, put the raw materials of component A into the reaction kettle one by one, stir for 15 minutes with a high-speed shear mixer, the stirring speed is 2500 rpm, and the material is discharged as component A with a viscosity of 2800mPa·s; The temperature of the component and Isocynate3 is at 21°C and 18°C, put the A component and Isocynate3 into a box foam machine and stir for 20 seconds, pour it into a mold at 30°C, and open the mold after aging for 25 minutes to obtain the present invention. The polyurethane foam; after placing the polyurethane foam at room temperature for 30 hours, the mechanical properties were tested.

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Abstract

The present invention discloses a polyurethane foam material and a preparation method thereof. The preparation method comprises: uniformly mixing and stirring a polyether polyol composition A and a modified isocyanate prepolymer B according to a certain ratio, pouring into a mold, and aging to obtain the polyurethane foam material, wherein the polyether polyol composition A comprises a mixed polyether polyol, a foaming agent, a chain extender, a catalyst, and, if necessary, an inorganic filler and a pigment paste, and the modified isocyanate prepolymer B comprises urethane modified isocyanate and carbodiimide modified isocyanate. According to the present invention, the polyurethane foam material has a density of 80-160 kg/m<3> and a hardness of ASKER C 10-40, and has characteristics of good gas permeability and low permanent compression deformation; and the material has good processing characteristics, the mold expansion during shrinkage and mold opening is avoided, and the defective rate of the product is reduced.

Description

technical field [0001] The invention relates to a polyurethane foam material and its preparation method and application. Background technique [0002] When people are exercising, most of them are done through the strength of the feet, so that the impact of a relatively large load is concentrated on the feet; in addition, the feet will produce a lot of sweat, and the growth of bacteria on the feet will reduce the impact on the feet. The comfort of the internal environment. The soles of most sports shoes have the characteristics of shock absorption and high elasticity, but it is obviously not enough to rely solely on the soles to improve the comfort of sports. [0003] Traditional sports insoles are mostly high-density rebound EVA. This material has higher resilience and flexibility than other materials, and its shock absorption performance is also very good. However, EVA foam has extremely poor air permeability, which can easily cause foot odor; another is EVA. The compress...

Claims

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Application Information

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IPC IPC(8): C08G18/79C08G18/66C08G18/40C08G18/48C08G18/63C08G18/12
CPCC08G18/12C08G18/3206C08G18/4072C08G18/4837C08G18/632C08G18/797C08G2110/0058C08G2110/0066C08G2110/0083C08G18/6674
Inventor 刘新建徐志磊赵怡
Owner WANHUA CHEM BEIJING
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