High-strength and high-toughness polyurethane material, as well as preparation method and use thereof

A polyurethane material and high toughness technology, applied in the field of polyurethane polymer materials, can solve problems such as high strength, complicated operation steps, and complicated processes

Active Publication Date: 2013-05-15
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of this patent includes two steps, and the process is relatively complicated; at the same time, its curing is realized by the reaction of double bonds, which is different from the simple curing method commonly used for polyurethane materials
[0010] The existing polyurethane materials have relatively obvious defects. The improvement of strength is achieved by compounding with glass fiber, compounding with epoxy resin, and forming a urea structure with blocked amine. The operation steps are complicated, and different materials need to be considered during

Method used

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  • High-strength and high-toughness polyurethane material, as well as preparation method and use thereof
  • High-strength and high-toughness polyurethane material, as well as preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048]In the MDI-100 (Yantai Wanhua, NCO content is 33.5wt%, with MDI-100 weight) preheated at 60 ℃, add the TDiol-400 (weight average molecular weight 400) through dehydration that is preheated at 60 ℃ Difunctional polyoxyethylene-polyoxypropylene copolyether polyol, Tianjin Sanpei), the weight ratio of MDI-100 and TDiol-400 is 5.76:1, react at 75-80°C for 1.5-2.0 hours, defoam and set aside , The NCO content of the obtained polyurethane prepolymer 1 is 25.5 wt%, based on the weight of the polyurethane prepolymer 1.

[0049] Component A is composed of 27wt% polyurethane prepolymer 1 and 25wt% PM-200 (Yantai Wanhua, with an NCO content of 32.0wt%, based on the weight of PM-200).

[0050] Component B is composed of 10wt% small molecule chain extender, 35wt% N 307 (trifunctional polyoxyethylene-polyoxypropylene copolyether polyol with a weight average molecular weight of 700, Nanjing Zhongshan Chemical Industry Co., Ltd.), in which small molecule chain extender The agent is com...

Embodiment 2

[0054] In TDI-80 preheated at 60°C (Cangzhou Dahua, NCO content is 48.2wt%, based on TDI-80 weight), add Poly THF 1000 (weight average molecular weight 1000 Difunctional polytetrahydrofuran polyol (BASF), the weight ratio of TDI-80 to Poly THF 1000 is 1.02:1, reacted at 75-80°C for 1.5-2.0 hours, defoamed for use, and the obtained polyurethane prepolymer 2 The NCO content of is 20.2wt%, based on the weight of polyurethane prepolymer 2.

[0055] Component A is composed of 5wt% polyurethane prepolymer 2 and 55wt% TDI trimer (Yantai Wanhua, NCO content is 8.0wt%, based on the weight of TDI trimer).

[0056] Component B consists of 2wt% small molecule chain extender, 30wt% Poly THF 1000 (difunctional polytetrahydrofuran polyol with weight average molecular weight 1000, BASF), 5wt% D-2000 (difunctional polytetrahydrofuran polyol with weight average molecular weight 2000 amino-terminated polyether, Huntsman), wherein the small molecule chain extender is composed of 3,3'-dichloro-4,...

Embodiment 3

[0061] Dicyclohexylmethane diisocyanate (H 12 MDI, NCO content is 32.0wt%, as H 12 MDI weight meter, Yantai Wanhua), add TDiol-400 (difunctional polyoxyethylene-polyoxypropylene copolyether polyol with a weight average molecular weight of 400, Tianjin Sanpei Chemical Co., Ltd.) that has been dehydrated and preheated at 60 ° C. h 12 The weight ratio of MDI to TDiol-400 is 20:1, react at 75-80°C for 1.5-2.5 hours, defoam and stand-by, the NCO content of the obtained polyurethane prepolymer 3 is 29.5wt%. 3 weights.

[0062] Component A consists of 14wt% polyurethane prepolymer 3, 29wt% PM-200 (Yantai Wanhua, NCO content is 32.0wt%, with PM-200 weight), 5wt% HDI trimer (Yantai Wanhua, NCO content is 21.8wt%, based on HDI trimer weight).

[0063] Component B is composed of 7wt% small molecule chain extender, 42wt% TMN 700 (trifunctional polyoxyethylene-polyoxypropylene copolyether polyol with a weight average molecular weight of 700, Tianjin Sanpei Chemical Co., Ltd.), in which...

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Abstract

The invention discloses a high-strength and high-toughness polyurethane material and a preparation method thereof. The high-strength and high-toughness polyurethane material is prepared by the reaction of the following raw materials: an A component, a B component and a C component, wherein the A component comprises a polyurethane prepolymer and one or two or more of polymethylene polyphenyl isocyanate and diisocyanate derivatives; the B component comprises a small-molecular chain extender and one or two or more of high polymer polyols and high polymer polyamines; and the C component comprises a catalyst and an antioxidant, as well as one or two or more of optional components, namely a dewatering agent, a defoaming agent, a plasticizer and an anti-hydrolysis agent. The prepared polyurethane material has special high strength and good toughness, and can withstand high-strength impact and prevent fracture; and furthermore, the bending strength can achieve 75-95MPa, the bending modulus can achieve 1900-2950MPa, and the impact strength can achieve 60-95KJ/m<2>.

Description

technical field [0001] The invention relates to a polyurethane polymer material, in particular to a high-strength and high-toughness polyurethane material, as well as its preparation method and application. Background technique [0002] As a polymer material, polyurethane can be used to prepare various products with a wide range of hardness. Usually, the hardness range of its products covers Shore hardness from Shore A 20 to Shore D 70. However, with the further expansion of the application field of polyurethane, users have also put forward new requirements for polyurethane materials in the actual application process. For example, the characteristics of low-viscosity polyurethane that can be directly poured to prepare products can be applied to materials that require high strength. In the field, the hardness of the material will usually exceed Shore D 70 at this time. And such a hardness range is the hardness range of traditional thermoplastics, such as polystyrene, nylon, ...

Claims

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Application Information

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IPC IPC(8): C08G18/79C08G18/76C08G18/66C08G18/10C08L75/06C08L75/08
Inventor 张昊王凯盛基泰孙家宽华卫琦
Owner WANHUA CHEM GRP CO LTD
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