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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, harsh reaction conditions, and high production cost, and achieve wide temperature range damping performance, low production cost, and high-quality products Performance adjustable effects

Inactive Publication Date: 2012-10-17
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
Comparison scheme
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℃, and dehydrate under high vacuum for 1~2 hours ;Reduce the temperature below 40°C, blow dry nitrogen to release the vacuum; under the protection of nitrogen, add TDI-80 diisocyanate (preset NCO% content is 5%) into the prepolymer reactor continuously with stirring, and then add The dehydrated polyether polyol is properly heated (due to the exothermic reaction) to raise the temperature to 80-100°C, keep it warm for 1-3 hours, and then cool down 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°C, dehydrate under high vacuum for 1~2 hours; lower the temperature to below 40°C, pass Introduce dry nitrogen to release the vacuum; under the protection of nitrogen,...

Embodiment 2

[0043] ①Use polyether polyol (PTMG2000, hydroxyl value 53~59mgKOH / g), preset NCO% content as 6%, and prepare TDI-PTMG2000 polyether prepolymer.

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

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

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

Embodiment 3

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

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

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

[0051] The physical and mechanical properties of 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 method for preparing a polyurethane material, in particular to a method for preparing 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 adhesive properties, 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] The polyurethane macromolecular chain unit structure is carbamate, which is formed 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] That is, it is obtained by reacting diisocyanate with polyol (polyether poly...

Claims

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Application Information

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