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Heat-resistant and high-damping polyurethane elastomer and preparation method thereof

A polyurethane elastomer and high damping technology, which is applied in the field of heat-resistant high-damping polyurethane elastomer and its preparation, can solve the problems of unsatisfactory use and poor heat resistance of polyurethane elastomer, and achieve excellent comprehensive performance and excellent oil resistance , high-strength effect

Active Publication Date: 2015-12-16
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a heat-resistant high-damping polyurethane elastomer and its preparation method, aiming to solve the poor heat resistance of the prior art polyurethane elastomer, which cannot meet the requirements of high temperature, high damping, and wide temperature range. Stable modulus Problems of use under environmental conditions such as

Method used

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  • Heat-resistant and high-damping polyurethane elastomer and preparation method thereof
  • Heat-resistant and high-damping polyurethane elastomer and preparation method thereof
  • Heat-resistant and high-damping polyurethane elastomer and preparation method thereof

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preparation example Construction

[0030] figure 1It shows the realization flowchart of preparing heat-resistant high-damping polyurethane elastomer according to the embodiment of the present invention. The preparation method of the heat-resistant high-damping polyurethane elastomer of the embodiment of the present invention, the specific steps are as follows:

[0031] Step 1, raw material weighing: according to the following raw material weight percentages, weigh the raw materials respectively;

[0032] Polytetrahydrofuran diol 27.92%~33.56%, diphenylmethane diisocyanate 8.52%~9.03%, polycaprolactone diol 26.02%~31.66%, 1,4-cyclohexane diisocyanate 9.02%~9.70%, N,N'-Dicyclohexylcarbodiimide 0.10%~0.30%, Neopentyl Glycol 4.91%~5.62%, Dibutyltin Dilaurate 0.06%~0.10%, Carbon Nanotube 0.60%~0.90%, The nano silicon dioxide is 15.02%-15.45%, and the sum of the weight percentages of each component is 100%.

[0033] Step 2, preparing acidified carbon nanotubes: adding the weighed carbon nanotubes to concentrated a...

Embodiment 1

[0055] In this embodiment, the heat-resistant high damping polyurethane elastomer is prepared according to the following steps:

[0056] Step 1, according to the following raw material weight percentages, weigh raw materials respectively;

[0057] Polytetrahydrofuran diol 33.56%, diphenylmethane diisocyanate 9.03%, polycaprolactone diol 27.07%, 1,4-cyclohexane diisocyanate 9.02%, N,N'-dicyclohexylcarbodiimide 0.30%, neopentyl glycol 4.91%, dibutyltin dilaurate 0.06%, carbon nanotubes 0.60%, nano silicon dioxide 15.45%, the sum of the weight percentages of each component is 100%.

[0058] Step 2, adding the weighed carbon nanotubes to concentrated H 2 SO 4 and concentrated HNO 3In the mixed acid composed, ultrasonically disperse for 30min at room temperature, and stir and acidify at 60°C for 3h, dilute with distilled water after cooling to room temperature, and vacuum filter with a filter funnel, then dilute with distilled water and vacuum filter, and wash repeatedly To neu...

Embodiment 2

[0066] Example 2 The method for preparing heat-resistant high-damping polyurethane elasticity is the same as Example 1, except that the weight percentages of raw materials used are different. The weight percentages of raw materials used in Example 2 are: polytetrahydrofuran diol 27.92%, diphenylmethane diisocyanate 8.88%, polycaprolactone diol 31.66%, 1,4-cyclohexane diisocyanate 9.7%, N,N'-dicyclohexylcarbodiimide 0.20%, neopentyl glycol 5.62%, dibutyl 0.1% of tin dilaurate, 0.9% of carbon nanotubes, 15.02% of nano silicon dioxide, and the sum of the weight percentages of each component is 100%.

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Abstract

The invention relates to a heat-resistant and high-damping polyurethane elastomer, which is prepared from the following raw materials by weight: 27.92%-33.56% of polytetramethylene glycol, 8.52%-9.03% of diphenyl-methane-diisocyanate, 26.02%-31.66% of polycaprolactone diol, 9.02%-9.70% of 1, 4-cyclohexane diisocyanate, 0.10%-0.30% of N, N'- dicyclohexylcarbodiimide, 4.91%-5.62% of neopentyl glycol, 0.06%-0.10% of dibutyltin dilaurate, 0.60%-0.90% of carbon nanotube, and 15.02%-15.45% of nano-silica, with the sum of the weight percentage of the components being 100%. The preparation method includes: weighing raw materials, preparing an acidified carbon nanotube, preparing a nano-silica dispersion solution, preparing a polyurethane elastomer prepolymer A, preparing a polyurethane elastomer prepolymer B, preparing a chain extender-carbon nanotube / neopentyl glycol composite hydroxyl component, preparing a polyurethane elastomer casting liquid, and preparing the heat-resistant and high-damping polyurethane elastomer by means of tape-casting. The method provided by the invention can solve the problem of poor heat resistance of polyurethane elastomers in the prior art, and the prepared polyurethane elastomer has high heat resistance and high damping property.

Description

technical field [0001] The invention belongs to the technical field of organic polymer resin synthesis, and in particular relates to a heat-resistant high-damping polyurethane elastomer and a preparation method thereof. Background technique [0002] Polyurethane refers to a high polymer containing a large number of carbamate groups (-NHCOO-) in the main chain. It is called Polyurethane internationally, or polyurethane for short. Polyurethane materials appeared in the 1930s. It was first successfully synthesized by Dr. Otto Bayer in Germany in 1937 using hexamethylene diisocyanate and 1,4-butanediol. Subsequently, a relatively special category appeared in polyurethane materials, namely polyurethane elastomers. In 1942, German chemist H. Piten first reported the "i-Rubber" isocyanate rubber synthesized from polyadipate polyol and diisocyanate. In the 1940s and 1950s, pouring type, mixing type and thermoplastic polyurethane elastomer technology began to be applied to the mar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/66C08G18/48C08G18/42C08G18/10C08K9/02C08K7/24C08K3/36C08J5/18
CPCC08G18/724C08J2375/06C08J2375/08C08K2201/011C08L2201/08C08L2203/18C08G18/10C08G18/3206
Inventor 方长青雷婉青周星安宁丽李嘉宾
Owner XIAN UNIV OF TECH
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