Preparation method of polyurethane energy-absorbing material

An energy-absorbing material, polyurethane technology, applied in the field of polyurethane energy-absorbing material preparation, can solve the problems such as difficult control of isopropanol volatilization, side reactions, etc., achieve good shear thickening performance and increase complexity

Active Publication Date: 2015-03-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The object of the present invention is to provide a preparation method of polyurethane energy-absorbing materials, using hydroxy silicone oil as a good solvent for borated organosilicon polymers to prepare shear thickening liquids, to overcome phase separation and isopropanol in the prior art Difficult to control the amount of volatilization, side reactions with MDI and other issues, making the preparation process simple and easy to control

Method used

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  • Preparation method of polyurethane energy-absorbing material
  • Preparation method of polyurethane energy-absorbing material
  • Preparation method of polyurethane energy-absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Preparation of polyurethane energy-absorbing material (one-step preparation process)

[0040] Table 1. Components and contents of raw materials for polyurethane energy-absorbing materials (n -NCO / n -OH =1.05)

[0041]

[0042] (1) Weigh polyoxypropylene diols DL2000, DL1000, DL400 (Shandong Dongda-Nuowei Polyurethane Co., Ltd.), respectively, with a mass of 10.0g, 5.0g, and 4.0g (component A) and add them to the single-necked flask in, stir evenly;

[0043] (2) Dissolve borated silicone polymer (Dow Corning Silicone Co., Ltd., brand name DC3179) in hydroxyl silicone oil (Zhonghao Chenguang Chemical Research Institute, brand name GY-209) at 80°C for 3 hours. The shear thickening liquid that obtains mass fraction is 50%; Take 7.3g mass fraction and be the shear thickening liquid of 50%, it is joined in the polyoxypropylene glycol three-component system in single-necked flask, stirs this System for 30 minutes to mix evenly;

[0044] (3) Weigh 8.8g of c...

Embodiment 2

[0048] Table 2. Components and contents of polyurethane energy-absorbing materials (n -NCO / n -OH =1.1)

[0049]

[0050] (1) Weigh polyoxypropylene diols DL2000, DL1000, DL400 respectively, with masses of 10.0g, 5.0g, and 4.0g (component A) (Shandong Dongda-Nuowei Polyurethane Co., Ltd.) and add them to the single-necked flask in, stir evenly;

[0051] (2) Dissolve borated silicone polymer (Dow Corning Silicone Co., Ltd., brand name DC3179) in hydroxyl silicone oil (Zhonghao Chenguang Chemical Research Institute, brand name GY-209) at 80°C for 3 hours. The shear thickening liquid that obtains mass fraction is 55%; Take 8.7g mass fraction and be the shear thickening liquid of 55%, it is joined in the polyoxypropylene glycol three-component mixing system in single-necked flask, stirs The system was mixed for 30 minutes until uniform;

[0052] (3) Weigh 12.3g of MDI (component B) (Huntsman Company of the United States) and add it to the above-mentioned system after stirr...

Embodiment 3

[0056] Table 3. Components and contents of polyurethane energy-absorbing materials (n -NCO / n -OH =1.15)

[0057]

[0058] (1) Weigh polyoxypropylene diols DL2000, DL1000, DL400 respectively, with masses of 10.0g, 5.0g, and 4.0g (component A) (Shandong Dongda-Nuowei Polyurethane Co., Ltd.) and add them to the single-necked flask in, stir evenly;

[0059] (2) Dissolve borated silicone polymer (Dow Corning Silicone Co., Ltd., brand name DC3179) in hydroxyl silicone oil (Zhonghao Chenguang Chemical Research Institute, brand name GY-209) at 80°C to obtain a mass fraction of 60 % shear thickening liquid; Weigh 12.7g mass fraction of 60% shear thickening liquid, add it to the three-component mixing system of polyoxypropylene glycol in the single-necked flask, stir the system for 30min to mix Uniform;

[0060] (3) Weigh 9.7g of MDI (component B) (U.S. Huntsman Company) and add it to the above-mentioned system after stirring evenly, and stir for 30 minutes until the mixture is...

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Abstract

The invention relates to a preparation method of a polyurethane energy-absorbing material. Hydroxyl silicone oil is adopted as a good solvent for boriding organosilicon polymer to prepare shear thickening fluid, thereby overcoming the problems of splitting phase, difficultly controlling the volatilization amount of isopropanol, producing side reaction with MDI and the like in the prior art. Compared with the prior art, the preparation method of the polyurethane energy-absorbing material is simple in preparation technique, short in preparation cycle, strong in operation controllability, and capable of improving the stability of products and benefiting the realization of large-scale production.

Description

Technical field: [0001] The invention relates to a preparation method of a polyurethane energy-absorbing material. Background technique: [0002] From the 1940s, German chemist Otto Bayer first synthesized compounds containing carbamate characteristic groups in the process of studying the reaction process of isocyanate addition polymers. With the continuous deepening of research in academia and industry, polyurethane has gradually become a kind of synthetic material with a wide range of uses. Its industrial production is mainly composed of polyvalent organic isocyanate and various hydrogen donor compounds (usually such as polyols compound) prepared by reaction. By choosing different numbers of functional groups and different types of functional groups, and using different synthesis processes, polyurethane products with different properties and appearances can be prepared. [0003] The types of polyurethane products are extremely rich, including foam plastics from very soft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/10C08L75/08C08L75/06C08L83/00C08L83/06
Inventor 吴丝竹杨威赵秀英赵爽张立群
Owner BEIJING UNIV OF CHEM TECH
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