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Pressure-resistant and wear-resisting polyurethane material

A polyurethane material and raw material technology, applied in the field of polyurethane materials, can solve the problems of poor material fluidity, short creaming time, and large amount of hanging material, and achieve the effects of reducing the amount of hanging material, prolonging the milking time, and increasing fluidity

Active Publication Date: 2015-01-07
ZHEJIANG HUANLONG NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned defects existing in the prior art, the present invention provides a compressive and wear-resistant polyurethane material, which can have excellent properties such as high hardness, high wear resistance, and scratch resistance; and can solve the problem of short milking time in the production process, The fluidity of the material is poor, and the amount of hanging material in the reactor is large.

Method used

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  • Pressure-resistant and wear-resisting polyurethane material
  • Pressure-resistant and wear-resisting polyurethane material
  • Pressure-resistant and wear-resisting polyurethane material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] With 20 kilograms of mixed polyols (by mass fraction, be made up of 16% polyoxybutylene polyols, 77% polyether polyols, 7% polymer polyols), mixed catalyst (stannous octoate, 2, Add 6 kg of 4-diaminophenol hydrochloride at a ratio of 1:2), 4 kg of HCFC141b blowing agent, and 10 kg of aminopropyltriethoxysilane coupling agent into the reaction kettle, stir and mix evenly.

[0019] Add 60 kg of isocyanate (diphenylmethane diisocyanate to polymethylene polyphenyl isocyanate in a mass ratio of 1:1.5) into the reactor and continue to stir for pre-polymerization foaming reaction.

[0020] The primary reacted material is poured into a mold for free foaming to obtain a pouring mold base, and after demoulding, the pouring mold base is matured and formed to obtain a polyurethane foam material.

[0021] A kind of pressure-resistant and wear-resistant polyurethane material obtained in Example 1 has a density of 59.4Kg / m 3 , the hardness (Shore A) is 78, the tensile strength is 485...

Embodiment 2

[0023] Compared with Example 1, the mixed polyols added to the reactor in this example are in mass fraction:

[0024] Polyoxybutylene polyol: 27%

[0025] Polyether polyol: 68%

[0026] Polymer polyol: 5%

[0027] All the other are identical with embodiment 1.

[0028] A kind of pressure-resistant and wear-resistant polyurethane material obtained in embodiment 2 has a density of 58.1Kg / m 3 , the hardness (Shore A) is 77, the tensile strength is 474KPa, the tear strength is 98N / m, and the friction coefficient is 1.3; the milky time of the material in the polymerization reaction is 51 seconds, and the viscosity is 3.8×10 -3 m 2 / s; The ratio of material suspension in the reactor is 5.7%.

Embodiment 3

[0030] Compared with Example 1, the mixed polyols added to the reactor in this example are in mass fraction:

[0031] Polyoxybutylene polyol: 35%

[0032] Polyether polyol: 62%

[0033] Polymer polyol: 3%

[0034] All the other are identical with embodiment 1.

[0035] A kind of compressive wear-resistant polyurethane material of embodiment 3 gained, its density is 56.7Kg / m 3 , the hardness (Shore A) is 79, the tensile strength is 468KPa, the tear strength is 99N / m, and the friction coefficient is 1.3; the milky time of the material in the polymerization reaction is 53 seconds, and the viscosity is 3.6×10 -3 m 2 / s; the ratio of material suspension in the reactor is 5.9%.

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Abstract

The invention discloses a pressure-resistant and wear-resisting polyurethane material, belonging to the field of polyurethane high molecular materials. The polyurethane material is characterized in that the raw material is composed of the following constituents in parts by weight: 20-40 parts of mixed polyhydric alcohol, 45-65 parts of isocyanate, 3-7 parts of mixed catalyst, 2-7 parts of halogenated hydrocarbon foaming agent and 5-10 parts of aminopropyl triethoxysilane coupling agent. After adding the mixed polyhydric alcohol, the mixed catalyst, the halogenated hydrocarbon foaming agent and the aminopropyl triethoxysilane coupling agent into a reaction kettle according to ratio, mechanically stirring and mixing uniformly, the isocyanate is added into the reaction kettle so as to be mechanically stirred and mixed uniformly and generate polymeric foaming reaction, then, the foamed material is cast in a mould so as to foam freely, thus, a casting mould blank is obtained, after demoulding, the casting mould block is treated by curing and molding to form the polyurethane foam material. The high molecular material provided by the invention has the advantages of being high in mechanical strength, hard, excellent in wear-resisting property, and so on.

Description

technical field [0001] The invention belongs to the field of polyurethane materials and relates to a pressure-resistant and wear-resistant polyurethane material. Background technique [0002] Polyurethane material is a new type of multifunctional polymer material with excellent performance. It occupies a very important position in the material industry and is one of the six major synthetic materials in the world. With the development of industry, the application range of polymer polyurethane materials has become more and more extensive, and various industries have also put forward higher requirements for the mechanical properties of polyurethane materials. The so-called "foamed material" generally refers to a material with a lower density that produces a cellular structure by using the "foaming" expansion method. However, for some applications, such as composites for roofing and siding sandwiches, model building materials and packaging materials, these materials may lack th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/40C08G18/48C08J9/14
Inventor 徐睿啟
Owner ZHEJIANG HUANLONG NEW MATERIAL SCI & TECH
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