Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/36—Hydroxylated esters of higher fatty acids
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
  • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
  • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
  • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
  • H01B3/302—Polyurethanes or polythiourethanes; Polyurea or polythiourea

Definitions

• the invention refers to the filling-in paste for electronic components, which ensures tight and elastic filling-up of component, with perfect insulation from unfavourable influences of external environment, and at the same time it ensures the good thermal conductivity and the practical self-suppression.
• Epoxide-resine, asphalts, polyurethane-resins and similar compounds are used as filling-in pastes for electronic components. These compounds are applied with various fillers, accelerators and dryers, which influence their electrical, mechanical and chemical features and also the self -suppression. The problem is complicated with filling-in paste preparation, high price and with harmonizing of all required properties. These compounds have mostly antagonistic properties - for example the good insulation properties, but the considerable internal stress during the hardening process for example at epoxide-resins, combined often with an exotherm reaction.
• the disadvantages of till used filling-in pastes are solved by the filling-in paste of this invention.
• Substance of the invention of the filling-in paste for electronic components is, that it concerns product of reaction anhydrous ricine-oil and polyizocyanate-resin; for this resin is advantageously used aromatic polyizocyanate with the main component triphenilmethan - 4,4,'4" - triizocyanate in ratio 100 weight parts of ricine-oil and 25 weight parts of polyizocyanate-resin.
• the filling-in paste is hardened at temperature range 0 - 75°C for the duration 20 minutes till 6 hours as required.
• the advantage of the filling-in paste opposite the well-known mixtures is, that it contains no harmful organic solvents as toluene, it shortens the hardening time at lower temperatures without demands on the following hardening: and it shows very good result properties, as dielectric and electroinsulating properties, heat conductivity and resistance, mechanical elasticity, gas and steam airtightness, and also very good adhesion to common used materials.
• the optimal result properties for the given use may be reached with the filling-in paste from the invention, by the various relative mixing ratio of ricine-oil and polyizocyanate-resin (with triizocyanate as its main component). At the same time it is not necessary to use fillers, dryers, accelerators and it is possible to change the consistence from nearly liquid to solid.
• the roll of capacitor made from polypropylene-folie with aluminium metalization is filled-up in the case with filling-in paste which is prepared by mixing of vacuum dryed ricine-oil and low-polmered polyizocyanate-resin (the main component of polyizocyanate-resin is triphenilmethan - 4,4',4" - triizocyanate), in ratio 100 weight parts of ricine-oil and 25 weight parts of polyizocyanate-resin. This mixture is solidified on the temperature + 75°C for 2 hours. The completation of the capacitor is made in normal way.
• filling-in paste which is prepared by mixing of vacuum dryed ricine-oil and low-polmered polyizocyanate-resin (the main component of polyizocyanate-resin is triphenilmethan - 4,4',4" - triizocyanate), in ratio 100 weight parts of ricine-oil and 25 weight parts of polyizocyanate-resin. This mixture is solidified on the temperature + 75
• the capacitcr without the filling-in paste and the capacitor filled-up with epoxide-resin are used for comparison.
• the test result shows considerable smaller decrease of the capacitance in the case of using the filling-in paste from the invention.
• the mentioned filling-in paste slackens the process of electrochemical oxidation of aluminium or other capacitor electrodes by loading of AC voltage, due to perfect seal of the roll and hinder the access of external humidity and air-oxygen.
• the filling-in paste from the invention enables to improve parameters of filling-up components, to increase the air-humidity resisting, moisture resisting, heat resisting and also ths mechanical shock and burn resisting. It extends the range of application of components and enables to get-significantly longer life durability.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Physics & Mathematics (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Health & Medical Sciences (AREA)
• Conductive Materials (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Polyurethanes Or Polyureas (AREA)
• Details Of Resistors (AREA)
• Die Bonding (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=5365665

Family Applications (1)

Country Status (5)

Citations (3)

• 1992
  • 1992-09-07 CZ CS922765A patent/CZ279560B6/cs unknown
  • 1992-11-07 SK SK276592A patent/SK278230B6/sk unknown
• 1993
  • 1993-07-01 WO PCT/CZ1993/000016 patent/WO1994006125A1/en not_active Application Discontinuation
  • 1993-07-01 EP EP93912548A patent/EP0612434A1/en not_active Withdrawn
  • 1993-07-01 RU RU94022273/07A patent/RU94022273A/ru unknown

Patent Citations (3)

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