CA2265199A1 - High temperature ptc device and conductive polymer composition - Google Patents

High temperature ptc device and conductive polymer composition Download PDF

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Publication number
CA2265199A1
CA2265199A1 CA002265199A CA2265199A CA2265199A1 CA 2265199 A1 CA2265199 A1 CA 2265199A1 CA 002265199 A CA002265199 A CA 002265199A CA 2265199 A CA2265199 A CA 2265199A CA 2265199 A1 CA2265199 A1 CA 2265199A1
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CA
Canada
Prior art keywords
high temperature
ptc
nylon
composition
omega
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002265199A
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French (fr)
Other versions
CA2265199C (en
Inventor
Liren Zhao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Emerson Electric Co
Original Assignee
Emerson Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Emerson Electric Co filed Critical Emerson Electric Co
Publication of CA2265199A1 publication Critical patent/CA2265199A1/en
Application granted granted Critical
Publication of CA2265199C publication Critical patent/CA2265199C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C08L101/12—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • H01C7/027—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient consisting of conducting or semi-conducting material dispersed in a non-conductive organic material

Abstract

A high temperature PTC device comprising a polymeric conductive composition that includes nylon-11 and a carbon-based particulate conductive filler has a switching temperature greater than 150°C, preferably between about 160°C and 200°C. The composition demonstrates a high PTC effect (at least 10 3, and more typically 10 4 to 10 5 or greater) and a resistivity at 25°C of 100 .OMEGA.cm or less, preferably .OMEGA.cm or less. High temperature PTC devices that comprise nylon-11 or nylon-12 compositions and that are manufactured by extrusion/lamination demonstrate good thermal and electrical stability compared with those manufactured by compression molding and do not require composition crosslinking for stability, although crosslinking may be used to further improve stability. The use of a high temperature solder for attaching electrical terminals to the device improves the PTC properties of the device.
CA002265199A 1998-03-24 1999-03-09 High temperature ptc device and conductive polymer composition Expired - Fee Related CA2265199C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/046,853 1998-03-24
US09/046,853 US5985182A (en) 1996-10-08 1998-03-24 High temperature PTC device and conductive polymer composition

Publications (2)

Publication Number Publication Date
CA2265199A1 true CA2265199A1 (en) 1999-09-24
CA2265199C CA2265199C (en) 2003-03-25

Family

ID=21945748

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002265199A Expired - Fee Related CA2265199C (en) 1998-03-24 1999-03-09 High temperature ptc device and conductive polymer composition

Country Status (5)

Country Link
US (2) US5985182A (en)
EP (1) EP0949639A1 (en)
JP (1) JPH11329076A (en)
KR (1) KR19990078186A (en)
CA (1) CA2265199C (en)

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Also Published As

Publication number Publication date
KR19990078186A (en) 1999-10-25
CA2265199C (en) 2003-03-25
EP0949639A1 (en) 1999-10-13
US6090313A (en) 2000-07-18
US5985182A (en) 1999-11-16
JPH11329076A (en) 1999-11-30

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