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Metallized membrane capacitance embedding wax

A technology of metallized film and potting wax, which is applied in the direction of capacitors, fixed capacitor shells/packages, chemical instruments and methods, etc., can solve the problems of toughness and plasticity, easy to be brittle, easy to leak, large shrinkage, etc., and achieve heat resistance And the effect of good cold resistance, excellent electrical properties and good performance

Inactive Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simply using commercial paraffin or microcrystalline wax has defects such as poor ductility and plasticity, which is easy to be brittle at low temperature and has relatively large shrinkage. The use of oil has large losses and is easy to leak, which does not meet the requirements of the current production plant.

Method used

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  • Metallized membrane capacitance embedding wax
  • Metallized membrane capacitance embedding wax

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] Embodiment: (below all represent by weight percentage)

[0030] experiment method

[0031] The following test methods are the usual ones for testing waxes used in the electronics industry used in the examples.

[0032] Dropping melting point GB / T8026

[0033] Penetration GB / T4985

[0034] Kinematic viscosity GB / T265

[0035] Moisture GB / T260

[0036] Mechanical impurities GB / T511

[0037] Dielectric constant GB / T5654

[0038] Volume resistivity GB / T5654

[0039] Dielectric loss GB / T5654

Embodiment 1

[0042] 70 # Microcrystalline wax, dropping point 69.4°C (Dushanzi Refinery) 28%

[0043] 75 # Microcrystalline wax, dropping point 76.4°C (Nanchong Oil Refinery) 15%

[0044] Synthetic wax, with an average melting point of 92.4°C (Jinxi Petrochemical Company) 2%

[0045] Polyisobutylene, average molecular weight 1000 (Jinzhou Lubricating Oil Additive Co., Ltd.) 20%

[0046] Medical Vaseline, dropping point 65.5°C (Hebei Lanlian Feitian Petrochemical Co., Ltd.) 35%

Embodiment 2

[0048] 70 # Microcrystalline wax, dropping point 69.4°C (Dushanzi Oil Refinery) 22%

[0049] 75 # Microcrystalline wax, dropping point 76.4°C (Nanchong Oil Refinery) 16%

[0050] Synthetic wax, with an average melting point of 92.4°C (Jinxi Petrochemical Company) 2%

[0051] Polyisobutylene, average molecular weight 1000 (Jinzhou Lubricating Oil Additive Co., Ltd.) 18%

[0052] Medical Vaseline, dropping point 65.5°C (Hebei Lanlian Feitian Petrochemical Co., Ltd.) 42%

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Abstract

The invention relates to a potting wax composition for metalized film capacitors, which comprises petroleum wax, synthetic wax, malthene and a tackiffer. The invention provides a potting wax composition for metalized film capacitors with suitable properties, and the defect of prior art that no special product exists in the field is made up. The invention is suitable for the potting of low voltage self-recover metalized polypropylene film power capacitors, CBB series capacitors and other metalized film capacitors. The invention has the advantages of good electrical properties, good moistureproof property, good fluidity, good heat resistant, good cold tolerance, suitable physical and chemical properties and processing property, innocuity, no corrosion, no impurity, and other advantages.

Description

technical field [0001] The invention relates to a potting wax, which is especially suitable for potting metallized film capacitors such as low-voltage self-healing metallized polypropylene film power capacitors and CBB series capacitors. Background technique [0002] In the production of metallized film capacitors, the main dielectric and the pores between the plate and the main dielectric are usually potted with a material to improve capacitance and insulation performance, and improve partial discharge and heat resistance. Simply using commercial paraffin wax or microcrystalline wax has defects such as poor ductility and plasticity, which is easy to be brittle at low temperature and has large shrinkage. The use of oil has large loss and is easy to leak, which does not meet the requirements of current production plants. Existing patents introduce metallized film capacitor potting materials with oil as the main component, such as JP03035513 patent introduction using polybuten...

Claims

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Application Information

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IPC IPC(8): C09K3/10C08L91/06H01G2/10H01G4/224
Inventor 李尚勇李莉李景斌杨光张造根王会民
Owner CHINA PETROLEUM & CHEM CORP
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