WO1996034055A1 - Polyester compositions - Google Patents
Polyester compositions Download PDFInfo
- Publication number
- WO1996034055A1 WO1996034055A1 PCT/US1996/004757 US9604757W WO9634055A1 WO 1996034055 A1 WO1996034055 A1 WO 1996034055A1 US 9604757 W US9604757 W US 9604757W WO 9634055 A1 WO9634055 A1 WO 9634055A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight
- aromatic polyester
- polyester
- composition according
- thermoplastic elastomer
- Prior art date
Links
Classifications
-
- 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
- H01B3/44—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 vinyl resins; acrylic resins
- H01B3/443—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 vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
- H01B3/445—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 vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds from vinylfluorides or other fluoroethylenic compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
-
- 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
- H01B3/42—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 polyesters; polyethers; polyacetals
- H01B3/421—Polyesters
- H01B3/422—Linear saturated polyesters derived from dicarboxylic acids and dihydroxy compounds
Definitions
- This invention relates to novel polyester compositions and insulated electrical conductors, especially insulated wires for use as lead wires in refrigeration systems and other hermetically sealed electrical apparatus (often called “hermetic lead wires”) .
- polyester compositions including compositions which can be melt-shaped, e.g. melt-extruded around a conductor to provide an insulating coating.
- U.S. Patent No. 5,225,635 discloses a hermetic lead wire in which the insulation comprises an insulating layer made by melt-extruding a composition containing chlorosulfonated polyethylene, an acid acceptor, a filler, and a peroxide crosslinking agent.
- compositions can be made by modifying polytetramethylene terephthalate (also referred to as PTMT, polybutylene terephthalate, and PBT) or a like aromatic polyester by addition thereto of a second polymer which has a recrystallization temperature greater than 150°C and is a polyester block copolymer.
- PTMT polytetramethylene terephthalate
- PBT polybutylene terephthalate
- a second polymer which has a recrystallization temperature greater than 150°C and is a polyester block copolymer.
- Such compositions have an excellent combination of resistance to deterioration by refrigerants and retention of physical properties when subjected to heat aging, and are particularly suitable for use as insulation on hermetic lead wires.
- this invention provides a polymeric composition which comprises
- thermoplastic aromatic polyester which consists essentially of 70 to 100% by weight of tetramethylene terephthalate units and 0 to 30% of other units which are randomly copolymerized with the tetramethylene terephthalate units, and
- the ratio by weight of the second polymer (2) to the aromatic polyester (1) being from 0.05:1 to 0.35:1.
- the invention provides an insulated electrical device which comprises a metal conductor, preferably a wire, and an insulating jacket comprising a melt-shaped layer of a composition according to the first preferred aspect of the invention.
- the invention provides an electrical assembly which comprises a hermetically sealed enclosure containing a refrigerant liquid and an insulated electrical conductor within the enclosure and contacted by the refrigerant, wherein said conductor is as defined in the second preferred aspect of the invention.
- the invention is chiefly described herein by reference to thermoplastic polyester compositions which can be melt shaped, preferably melt extruded around a conductor, e.g. a solid or stranded wire, to provide an insulating coating around the wire.
- the wire size is 4 to 38 AWG, preferably 10 to 30 AWG.
- the wire is to be used as a hermetic lead wire, it is preferably a stranded wire.
- coating is used herein to denote a coating which is the sole insulating coating around the conductor; or a coating which is one of several insulating coatings around the conductor (the polyester composition being the innermost coating, or the outermost coating, or an intermediate coating or two or more of these coatings) ; or an insulating jacket around two or more conductors each having an individual insulating coating around it.
- the thickness of the coating is generally 0.05 to 0.8 mm (0.002 to 0.030 inch), preferably 0.08 to 0.4 mm (0.003 to 0.015 inch).
- the invention is also applicable to other melt-shaped configurations, e.g. tubing and molded parts, and to compositions which can be shaped in other ways, and to compositions whose prime function is not to provide electrical insulation. Parts and percentages given in this specification are by weight unless otherwise noted.
- Component (1) of the composition is an aromatic polyester which contains 70 to 100%, preferably 95 to 100%, particularly 100%, by weight of tetramethylene terephthalate units, and in which any other units are randomly copolymerized with the tetramethylene terephthalate units.
- Such other units can be, for example, other alkylene terephthalate units, e.g. ethylene terephthalate units, or aliphatic polyester units.
- the polyester block copolymer used in this invention is preferably a thermoplastic elastomer (TPE) comprising aromatic polyester blocks and aliphatic polyester blocks.
- TPE thermoplastic elastomer
- the melting point of the TPE is preferably greater than
- the percentage by weight of aromatic polyester blocks is generally 10 to 90%, preferably 37 to 90%, particularly 70 to 90%.
- the aromatic and aliphatic polyester blocks can be linked together, for example, through ester groups and/or urethane groups, for example through a urethane group of the formula
- the repeating units in the aliphatic polyester blocks have the formula -0- (CH 2 ) q -O.CO- (CH 2 ) r -C0 wherein each of q and r, which may be the same or different, is at least 2, preferably 2 to 6, particularly 4. Preferably all the repeating units are the same.
- Suitable block polyesters are available from DSM Engineering Plastics under the trade name "Arnitel”, e.g. Arnitel UM550, UM551, and UX4854, and are described in U.S. Patent No. 4,483,970 (Huntjens et al. , assigned to Akzo N.V.), the disclosure of which is incorporated herein by reference.
- the ratio by weight of the polyester block copolymer to the aromatic polyester is preferably 0.05:1 to 0.35:1, particularly 0.15:1 to 0.30:1, especially 0.22:1 to 0.27:1.
- the polymeric component of the compositions preferably consists essentially of the polyester block copolymer and the aromatic polyester, but can also contain one or more other polymers (e.g. other polyesters, including homopolymers and random and block copolymers, such as polyethylene terephthalate) , preferably in amount less than 20%, particularly less than 10%, based on the weight of the TPE.
- other polymers e.g. other polyesters, including homopolymers and random and block copolymers, such as polyethylene terephthalate
- compositions can contain non-polymeric ingredients, generally in amount less than 20%, preferably less than 10%, particularly less than 4%, by weight based on the weight of the composition.
- additives can be inorganic or organic, and include antioxidants, stabilizers, processing aids, coloring agents, fillers and flame retardants, including antimony trioxide, e.g. in amount 3-15%, and brominated flame retardants, e.g. in amount 5 to 15%.
- suitable additives reference may be made to the documents incorporated herein by reference.
- the composition preferably has less than 0.8%, particularly less than 0.6%, especially less than 0.35% extractables when subjected to the Freon extraction test described below.
- Such compositions can for example be obtained by blending an aromatic polyester which has less than 0.3% extractables with a polyester block copolymer which has more than 1.2% extractables in the Freon extraction test.
- the composition preferably has a similarly low level of extractables in a test which is the same as the Freon extraction test except that the Freon 22 is replaced by the refrigerant actually used.
- the melt-extruded insulating jacket preferably has an initial elongation of at least 200%, particularly at least 300%, especially at least 360%, and an elongation of at least 200%, particularly at least 300%, especially at least 360%, after aging for 168 hours at 156°C.
- TPE 1 is the TPE sold by DSM Engineering Plastics under the trade name Arnitel UX4854.
- TPE 2 is the TPE sold by DSM Engineering Plastics under the tradename Arnitel UM551V.
- Arnitel UX4854 and UM551V are believed to be TPE's as defined above in which Ar is a phenylene group, each of p, q and r is 4, and the aromatic and aliphatic polyester blocks are linked together through a urethane group of the formula
- PBT is the polybutylene terephthalate sold by Hoechst
- WT10, BK10, RD10, RD11, and OR10 are the color concentrates sold by Wilson Color Inc. under the tradenames Wilson-89-WT-10, Wilson-89-BK-10, Wilson-89-RD-10, Wilson-89-RD-ll, and Wilson-89-OR-10, respectively.
- Resistance to Heat Agin ⁇ is measured by the method of ASTM D 3032, Section 14. The results given are the average times to failure (in hours) for ten specimens aged at the indicated temperature. The Table also includes estimated minimum times for aging at 125°C (with 18k etc. meaning 18,000 hours etc).
- Extractables is measured by the CFC Extraction Test described in NEMA Publication MW1000, paragraph 3.55.
- Elon ⁇ ation% and Tensile Strength are measured by the method of ASTM D 3032, Section 14, both initially and after aging for 168 hours at 156°C ("aged" in Table).
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8532540A JPH11504365A (en) | 1995-04-26 | 1996-04-04 | Polyester composition |
EP96910766A EP0822961A1 (en) | 1995-04-26 | 1996-04-04 | Polyester compositions |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US42938495A | 1995-04-26 | 1995-04-26 | |
US08/429,384 | 1995-04-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996034055A1 true WO1996034055A1 (en) | 1996-10-31 |
Family
ID=23703002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1996/004757 WO1996034055A1 (en) | 1995-04-26 | 1996-04-04 | Polyester compositions |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0822961A1 (en) |
JP (1) | JPH11504365A (en) |
CA (1) | CA2219122A1 (en) |
MX (1) | MX9708230A (en) |
WO (1) | WO1996034055A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002077100A2 (en) * | 2001-03-21 | 2002-10-03 | Kimberly-Clark Worldwide, Inc. | Compositions for enhanced thermal bonding |
KR100423233B1 (en) * | 2001-03-21 | 2004-03-18 | 엘지전선 주식회사 | High strength insulation materials with flame retardant |
WO2008066977A2 (en) | 2006-11-27 | 2008-06-05 | Sabic Innovative Plastics Ip B.V. | Polyester blends, methods of making, and articles formed therefrom |
EP2410616A1 (en) * | 2009-05-27 | 2012-01-25 | Omron Corporation | Oil resistant electronic device and method for manufacturing same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994016014A1 (en) * | 1993-01-14 | 1994-07-21 | Raychem Corporation | Polyester compositions for wire insulation |
WO1996002591A1 (en) * | 1994-07-14 | 1996-02-01 | Raychem Corporation | Polyester compositions |
-
1996
- 1996-04-04 CA CA 2219122 patent/CA2219122A1/en not_active Abandoned
- 1996-04-04 EP EP96910766A patent/EP0822961A1/en not_active Ceased
- 1996-04-04 WO PCT/US1996/004757 patent/WO1996034055A1/en not_active Application Discontinuation
- 1996-04-04 JP JP8532540A patent/JPH11504365A/en active Pending
-
1997
- 1997-10-24 MX MX9708230A patent/MX9708230A/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994016014A1 (en) * | 1993-01-14 | 1994-07-21 | Raychem Corporation | Polyester compositions for wire insulation |
WO1996002591A1 (en) * | 1994-07-14 | 1996-02-01 | Raychem Corporation | Polyester compositions |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002077100A2 (en) * | 2001-03-21 | 2002-10-03 | Kimberly-Clark Worldwide, Inc. | Compositions for enhanced thermal bonding |
WO2002077100A3 (en) * | 2001-03-21 | 2003-02-06 | Kimberly Clark Co | Compositions for enhanced thermal bonding |
GB2390368A (en) * | 2001-03-21 | 2004-01-07 | Kimberly Clark Co | Compositions for enhanced thermal bonding |
KR100423233B1 (en) * | 2001-03-21 | 2004-03-18 | 엘지전선 주식회사 | High strength insulation materials with flame retardant |
GB2390368B (en) * | 2001-03-21 | 2005-04-20 | Kimberly Clark Co | Compositions for enhanced thermal bonding |
US6946195B2 (en) | 2001-03-21 | 2005-09-20 | Kimberly-Clark Worldwide, Inc. | Compositions for enhanced thermal bonding |
WO2008066977A2 (en) | 2006-11-27 | 2008-06-05 | Sabic Innovative Plastics Ip B.V. | Polyester blends, methods of making, and articles formed therefrom |
EP2410616A1 (en) * | 2009-05-27 | 2012-01-25 | Omron Corporation | Oil resistant electronic device and method for manufacturing same |
EP2410616B1 (en) * | 2009-05-27 | 2014-03-26 | Omron Corporation | Oil resistant electronic device and method for manufacturing same |
Also Published As
Publication number | Publication date |
---|---|
CA2219122A1 (en) | 1996-10-31 |
MX9708230A (en) | 1998-06-30 |
JPH11504365A (en) | 1999-04-20 |
EP0822961A1 (en) | 1998-02-11 |
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