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Preparation method of mixed polyether-polyester polyurethane/epoxy damping composite

A damping composite material, polyester polyurethane technology, applied in the direction of polyurea/polyurethane coatings, polyurea/polyurethane adhesives, adhesive types, etc., can solve the incompatibility of polyester polyols, complicated synthesis process, reactive Harsh conditions and other problems, to achieve the effect of adjustable product performance, simple process and low production cost

Active Publication Date: 2013-04-03
SHENYANG HUADA R & D CENT OF POLYMER MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Preparation method of mixed polyether-polyester polyurethane/epoxy damping composite

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preparation example Construction

[0035] ① Preparation of epoxy modified polyether prepolymer:

[0036] Add polyether polyol into the reaction kettle, heat at 100~110°C, and dehydrate under high vacuum for 1~2 hours; lower the temperature to below 40°C, blow dry nitrogen to release the vacuum; under the protection of nitrogen, stir and add diisocyanate ( Calculate the addition amount according to the preset NCO% content) into the prepolymer reactor, then add the dehydrated polyether polyol, heat it properly (due to the exothermic reaction), make the temperature rise to 80~100℃, and keep it warm for 1~3 hour, then add epoxy resin to react for 2 hours, and cool down to 40°C to obtain epoxy-modified polyether prepolymer.

[0037] ② Preparation of polyester prepolymer:

[0038]Add the polyester polyol into the dehydration kettle, heat at 100~140°C, and dehydrate under high vacuum for 1~2 hours; lower the temperature to below 40°C, pass through dry nitrogen to release the vacuum; under the protection of nitrogen, ...

Embodiment 1

[0044] ① Add polyether polyol PPG (brand DG330N, hydroxyl value 32~36mgKOH / g) into the reaction kettle, heat at 100~110°C, dehydrate under high vacuum for 1~2 hours; lower the temperature below 40°C, and pass dry nitrogen Release the vacuum; under the protection of nitrogen, stir and continuously add TDI-80 diisocyanate (preset NCO% content is 4%) to the prepolymer reactor, then add dehydrated polyether polyol, heat (also exothermic reaction ), raise the temperature to 80~100°C, keep it warm for 1~3 hours, then add E-44 epoxy resin to react for 2 hours, and cool down to 40°C to obtain epoxy modified polyether prepolymer.

[0045] ② Add polyester polyol PET (brand DF100, hydroxyl value 100±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, and pass dry nitrogen into it Release the vacuum; under the protection of nitrogen, stir and continuously add MDI diisocyanate (preset NCO% content is 4%) ...

Embodiment 2

[0048] The polyester polyol PET among the embodiment 1 is changed into PEA (brand X-1200, hydroxyl value 73mgKOH / g) and MDI is changed into TDI, prepares TDI-PEA; DG330N polyether prepolymer, the mass ratio of epoxy modified polyether type / polyester type prepolymer is 10 / 0, 9 / 1, 8 / 2, 7 / 3, 6 / 4, 5 / 5, Measure the actual NCO% to be 4.1±0.2%; Stir and add the pre-melted chain extender MOCA, enter the mold for curing, preheat the mold at 90°C, and hot press; demould and post-vulcanize to obtain polyether (PPG)-polyester (PEA) polyurethane / epoxy damping material.

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Abstract

A preparation method of a mixed polyether-polyester polyurethane / epoxy damping composite belongs to the technical field of the preparation of the polymer damping material. The preparation method comprises the following steps: using polyether polyol, diisocyanate and epoxy resin to prepare epoxy polyether polyurethane prepolymer, using polyester polyol and diisocyanate to prepare polyester prepolymer, then mixing the two prepolymers according to a ratio, and using chain extender to prepare the new mixed polyether-polyester polyurethane / epoxy damping composite through crosslinking. The preparedcomposite has the excellent performances of polyether polyurethane, polyester polyurethane and epoxy resin materials and has wide temperature range damping property. The preparation method of the invention is simple, the technology is stable and mild, the product performance can be controlled and the industrial large-scale production can be realized. The obtained composite can be widely used as damping material, elastic material, wear resistant material, sealing material, anticorrosive material, medical material, sports material, binding material and the like.

Description

technical field [0001] The invention relates to a method for preparing a composite material, in particular to a method for preparing a mixed polyether-polyester polyurethane / epoxy damping composite 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 p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/58C08G18/48C08G18/42C08G18/10C09D175/06C09D175/08C09J175/06C09J175/08
Inventor 陈尔凡马弛李娜
Owner SHENYANG HUADA R & D CENT OF POLYMER MATERIALS CO LTD
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