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Stable nanometer oxidate dispersion solution, preparation method and application thereof

A nano-scale oxide and dispersion liquid technology, applied in the nano field, can solve the problems of increasing production cost, high price, sedimentation and agglomeration of nano-oxide particles, etc., and achieves the effects of stable performance, low cost and simple preparation method.

Active Publication Date: 2010-09-01
无锡高拓新材料股份有限公司
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  • Abstract
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Problems solved by technology

[0003] At present, only a few units in my country have carried out scientific research batch trial production through the technical tracking of foreign products, but the "sol-gel method" used in large-scale production is relatively complicated, and the manufacturing cost is relatively high, while the general simple stirring and dispersing method, it is easy to cause the sedimentation and agglomeration of nano-oxide particles in the polyamic acid solution, resulting in uneven distribution of nano-oxides in polyimide and seriously affecting product performance
Therefore, my country's AC traction motors and variable frequency speed regulation motors are all dependent on imports, which are expensive and greatly increase production costs.

Method used

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  • Stable nanometer oxidate dispersion solution, preparation method and application thereof

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Effect test

Embodiment 1

[0018] At 50°C, in a dimethylacetamide solvent, pyromellitic dianhydride and 4,4'-diaminodiphenyl ether are equimolarly polycondensed, and dimethylacetamide accounts for the above reaction system materials ( Including 70-90% by weight of dimethylacetamide, pyromellitic dianhydride and 4,4'-diaminodiphenyl ether), the reaction time is 4 hours, and the polyamic acid solution is obtained. Then add triethylamine equivalent to the carboxyl group and stir for 30 minutes to obtain polyamic acid trialkylammonium salt.

Embodiment 2

[0020] At 20°C, add 5kg of dimethylacetamide, 3.4kg of polyamic acid trialkylammonium salt and 0.1kg of ethoxysilane into the ultrasonic disperser. After ultrasonic dispersion for 2 hours, add 1.5kg of nano-scale Titanium oxide was ultrasonically dispersed for 3 hours to obtain a stable nanoscale oxide dispersion.

Embodiment 3

[0022] At 30°C, add 6kg of dimethylacetamide, 2.99kg of polyamic acid trialkylammonium salt and 0.01kg of ethoxysilane into the ultrasonic disperser. After ultrasonic dispersion for 1 hour, add 1kg of nano-scale oxidation Iron, ultrasonically dispersed for 2 hours to obtain a stable nanoscale oxide dispersion.

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Abstract

The invention discloses a stable nano-grade oxide dispersion which includes the components as the following weight percentages: 10 to 20 percent of nano-grade oxide, 40 to 60 percent of dimethyl acetamide, 20 to 40 percent of polyamide acid salt as well as 0.1 to 1 percent of ethoxy silane. The invention also discloses a preparation method for the stable nano-grade oxide dispersion. The stable nano-grade oxide dispersion stabilizes the production technique of a corona-resistant polyimide film and ensures the corona-resistant performance of the polyimide film; besides, the performance is stable and the cost is lower.

Description

technical field [0001] The invention relates to nanotechnology, in particular to a stable nanoscale oxide dispersion and its preparation method and application. Background technique [0002] With the development of AC traction motors and variable frequency speed regulating motors in our country, ordinary polyimide insulating materials can no longer meet the thermal and electrical stresses of their insulation systems, and the excellent thermal stability and thermal conductivity of nano-scale oxides are used , electronic and light shielding effects, plus the inherent excellent comprehensive properties of polyimide, the composite insulating material made of it has remarkable resistance to high-frequency pulse voltage and corona resistance, which greatly improves the service life of the insulating material. Guarantee the insulation reliability of the traction motor and variable frequency motor. [0003] At present, only a few units in my country have carried out scientific rese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K3/22C08K3/36C08K5/5415C08J3/21C08J5/18H01B3/30
Inventor 沈国强
Owner 无锡高拓新材料股份有限公司
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