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Method for preparing novel polyether-polyester polyurethane material

A technology of polyester polyurethane and polyether, which is applied in the field of polyurethane material preparation, can solve the problems of polyester polyol incompatibility, cumbersome synthesis process, harsh reaction conditions, etc., achieve wide temperature range damping performance, simple process, and low production cost low effect

Inactive Publication Date: 2011-05-25
TIELIN ERFAN RUBBER R & D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Other patents such as EP0196458 (A2), US4687835A, US5122303A, US4205158A, US4562232 A, US 5145944 A, US6753402A, US 6211249A and many other patents, as well as products such as Hytrel commercialized by DuPont Company, all start from polyester polyether copolymer polyols, It solves the problem of incompatibility between polyether polyol and polyester polyol, but this kind of technical approach must make the polyol macromolecular chain have ether and ester unit structures at the same time. Some special compounds (such as other reactants and catalysts, etc.) are required, and the preparation cost is also greatly increased

Method used

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  • Method for preparing novel polyether-polyester polyurethane material
  • Method for preparing novel polyether-polyester polyurethane material
  • Method for preparing novel polyether-polyester polyurethane material

Examples

Experimental program
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Effect test

Embodiment 1

[0037] ①Add polyether polyol DG330N (polyether polyol of glycerin, propylene oxide and ethylene oxide, hydroxyl value 32~36mgKOH / g) into the reaction kettle, heat at 100~110℃, dehydrate in high vacuum for 1~2 hours ; Lower the temperature to below 40°C, introduce dry nitrogen to dissolve the vacuum; under nitrogen protection, continuously add TDI-80 diisocyanate (preset NCO% content is 5%) into the prepolymer reaction kettle, and then add The dehydrated polyether polyol is appropriately heated (due to the exotherm of the reaction), the temperature is raised to 80~100°C, the temperature is maintained for 1~3 hours, and the temperature is lowered to 40°C to obtain TDI-DG330N polyether prepolymer.

[0038]② Add polyester polyol PL1201 (phthalic anhydride polyester polyol, hydroxyl value 120±5mgKOH / g) into the dehydration kettle, heat at 100~140℃, and dehydrate in high vacuum for 1~2 hours; reduce the temperature to below 40℃, pass Enter dry nitrogen to decompose the vacuum; under...

Embodiment 2

[0043] ①TDI-PTMG2000 polyether prepolymer was prepared by using polyether polyol (PTMG2000, hydroxyl value of 53~59mgKOH / g) and preset NCO% content of 6%.

[0044] ② Polyester polyol (PEA2000, hydroxyl value 55-62mgKOH / g), the preset NCO% content is 6%, to prepare MDI-PEA2000 polyester prepolymer.

[0045] ③ Mix TDI-PTMG2000 polyether prepolymer and TDI-PEA2000 polyester prepolymer at a ratio of 1:1, and measure the actual NCO% content to be 6.1±0.2; stir and add the premelted chain extender MOCA to prepare the casting Type polyether-polyester polyurethane elastomer material.

[0046] The physical and mechanical properties of the polyether-polyester polyurethane are shown in Table 2.

Embodiment 3

[0048] ① Using polyether polyol (PPG1000, hydroxyl value 53~59mgKOH / g), the preset NCO% content is 5.5%, to prepare HDI-PPG2000 polyether prepolymer.

[0049] ② Polyester polyol (PBA2000, hydroxyl value 55.6mgKOH / g), preset NCO% content of 5.5%, to prepare HDI-PBA2000 polyester prepolymer.

[0050] ③ Mix the HDI-PPG2000 polyether prepolymer and the HDI-PBA2000 polyester prepolymer in a ratio of 1:1, and stir and add the chain extender propylene glycol PDO according to NCO:OH = 1.05:1. Polyester polyurethane elastomer material.

[0051] The physical and mechanical properties of the polyether-polyester polyurethane are shown in Table 2.

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Abstract

The invention belongs to the technical field of polyurethane materials and relates to a method for preparing novel a polyether-polyester polyurethane material, in particular to a method for preparing a polyether-polyester polyurethane material by a two-step process. The method is characterized by comprising the following steps of: preparing a polyether prepolymer and a polyester prepolymer respectively by using polyether polyhydric alcohol and polyester polyhydric alcohol and diisocyanate, mixing the two prepolymers according to a ratio, and crosslinking by using a chain extender to prepare novel polyether-polyester polyurethane. The polyether-polyester polyurethane material has the combined excellent performance of a polyether polyurethane material and a polyester polyurethane material, and has the wide-temperature range damping performance. The preparation method is simple and convenient and stable and mild in process and allows for controlling product performance, and can be used for large-scale industrial production. The polyether-polyester polyurethane material can be widely used as a damping material, an elastic material, a wearing resistant material, a sealing material, an anticorrosive material, a medical material, a sports material, a bonding material and the like.

Description

technical field [0001] The invention relates to a preparation method of a polyurethane material, in particular to a preparation method of a novel polyether-polyester polyurethane material. Background technique [0002] Polyurethane material is a kind of elastic material with excellent high elasticity, wear resistance, oil resistance, tear resistance, aging resistance, chemical resistance and adhesion performance, etc. It can be used as damping material, elastic material, wear-resistant material, sealing materials, anti-corrosion materials, medical materials, sports materials and bonding materials, etc. [0003] Polyurethane macromolecular chain unit structure is carbamate, which is generated by the reaction of isocyanate functional group -N=C=O and hydroxyl group-OH, and its preparation reaction: [0004] [0005] Diisocyanate + Polyol → Polyurethane + Chain Extender → Polyurethane [0006] It is obtained by the reaction of diisocyanate and polyol (polyether polyol...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/10
Inventor 陈尔凡
Owner TIELIN ERFAN RUBBER R & D CO LTD
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