US3909507A - Electrical conductors with strippable polymeric materials - Google Patents
Electrical conductors with strippable polymeric materials Download PDFInfo
- Publication number
- US3909507A US3909507A US422326A US42232673A US3909507A US 3909507 A US3909507 A US 3909507A US 422326 A US422326 A US 422326A US 42232673 A US42232673 A US 42232673A US 3909507 A US3909507 A US 3909507A
- Authority
- US
- United States
- Prior art keywords
- elastomer
- electrical conductor
- ethylene
- chlorosulfonated polyethylene
- sulfur
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/20—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
Definitions
- Ncuhauser 5 7 ABSTRACT A composite of polymeric materials which are adheringly joined to each other and which can be easily and cleanly separated by stripping apart with a low pulling force whereupon the contacting surfaces of their interface each separate cleanly without retention of any residue from the other, and which comprises the combination of a body of peroxide curable ethylenecontaining polymer adjoined to a body of a sulfur curable elastomer comprising chlorosulfonated polyethylene.
- the combination of materials is especially advantageous when used in wire and cable constructions comprising a composite of an electrical insulation and an overlying strippable semiconductive layer.
- a common type of construction for electrical wires or cables designed for medium to high voltage applications, for example about to 35 KV, as well as other classes of electrical service, comprises combinations of one or more insulating layers and semiconductive layers.
- the metallic conductor may be provided with an organic polymeric insulation such as cross-linked polyethylene, and ;an overlying body of semiconducting material comprising an organic polymeric composition which has been rendered electroconductive by the inclusion therein of electrical conductivity imparting agents or fillers such as carbon black.
- these cable constructions may vary in certain elements, and often include an intermediate component disposed between the metallic conductor and the primary body of dielectric insulation such as a layer of separating tape or inner layer of semi conductive material, or are enclosed within protective covering sheaths, all such cable constructions conventionally include therein at least a body of primary insulation surrounding theconductor with an overlying body of semiconducting material in physical contact with the insulation.
- an intermediate component disposed between the metallic conductor and the primary body of dielectric insulation such as a layer of separating tape or inner layer of semi conductive material, or are enclosed within protective covering sheaths
- all such cable constructions conventionally include therein at least a body of primary insulation surrounding theconductor with an overlying body of semiconducting material in physical contact with the insulation.
- this arrangement of a layer of insulation with a superimposed layer of semiconductive material thereover incurs certain handicaps.
- No. 3,646,248 discloses that this problem is resolved by the use of an olefinic terpolymer insulation with a first curing system and an olefinic terpolymer semiconductive material with a second curing system comprising a different curing agent.
- the insulation layer and overlying semiconductive layer for electrical cable can be formed concurrently about the wire or metal conductor by means of a continuous simultaneous extrusion process with one Iextruder apparatus, or these layers are formed in sequence employing tandem extruders, and both layers are thereafter cured at the same time in a single operation and unit to minimize manufacturing steps and apparatus.
- the simultaneous curing of both la'yers together, or even the curing of only one layer alone while it is in a contiguous arrangement. with the other can result in the apparent formation of cross-linking bonds bridging the interface between the adjoining surfaces of each phase.
- This invention comprises a combination of specific organic polymeric materials, which are cured with dissimilar curing systems, and a composite construction formed therewith wherein the two phases or bodies of the curable materials are adheringly united with each other at their abutting surfaces to provide a substantially continuous and secure union of their contacting surfaces extending over their common interface.
- the combination and cure systems of the invention effectively obviate the occurrence of intermediate void spaces between the interface of the two phases or bodies, while at the same time providing an interface union between the phases which is easily separated with a relatively small pulling force whereupon the components part with clean surfaces each free of any residue from the other.
- the invention also comprises a method of producing electrically insulated and shielded cables.
- the invention includes the combination of a first body of peroxide curable ethylene-containing polymer with a second body composed of a sulfur curable chlorosulfonated polyethylene rubber (Hypalon).
- the sulfur curable chlorosulfonated polyethylene can contain minor amounts of an ethylene-propylene rubber dispersed therethrough to enhance the plastic properties of the chlorosulfonated polyethylene rubber.
- compositions and the attributes of this combination are uniquely suitable and advantageous for use in the construction of insulated electrical wires and cables in the formation of a composite insulation of an ethylene-containing polymer with an easily and cleanly strippable semiconductive material superimposed over the insulation.
- the polymeric material comprising the said chlorosulfonated polyethylene elastomer can be rendered suitably electroconductive so as to perform as a semiconductive material by appropriately filling it with a typical electrical conductivity imparting agent or filler such as carbon black, dispersed therethrough, or some other electrically conductive particulate material amounts so as to impart the desired degree of conductivity.
- FIG. 1 comprises a perspective view of a portion of an insulated conductor having a semiconductive shield DESCRIPTION OF A PREFERRED EMBODIMENT
- This invention is hereinafter described in relation to its principal field of application and utility, namely, the
- the invention specifically comprises a novel combination of given curable polymeric materials, or com bined bodies composed. thereof, which provide unique interfacial characteristics when their contiguous surfaces are adheringly joined together by curing the polymeric material of at least one of the combined bodies.
- Curable polymeric materials of the invention comprise v for the one phase, a body or unit of peroxide curable ethylene-containing polymer, and for the other phase of the composite, a body or unit of a sulfur curable chlorosulfonated polyethylene elastomer.
- the peroxide curable ethylene-containing polymer of one phase of the combined polymeric bodies includes polyethylene, a common and extensively used electrical insulation material for wire and cable, which is cross-link curable with peroxide curing agents to a thermoset state in keeping with the requirements of the invention. Also included are similar copolymers of ethylene and other polymerizable materials, and blends of such polymers and copolymers which are atleast predominantly composed of ethylene and are known in the art to provide effective cross-link curable electrical insulations. For example, copolymers of ethylene and' vinyl acetate and similar copolymers wherein the ethylene content is a majority of more than 50% by weight,
- the sulfur curable. chlorosulfonated polyethylene (I-lypalon) elastomer phase which when joined with the peroxide curable ethylene-containing polymer phase together produce the distinctive interfacial characteristics and functions of this invention, may include minor amounts of an ehtylene-propylene copolymer or terpolymer rubber as a softening agent or plasticizer to render the chlorosulfonated polyethylene more tractable in compounding with the electroconductive filler and other ingredients and in processing and forming.
- the terpolymers of ethylene, propylene and a diene can be included in amounts of up to about 30 by weight of the blend with the chlorodulfonated polyethylene.
- the copolymers of ethylene and propylene which are not curable with sulfur systems, cannot be tolerated in proportions of more than about 20% by weight of the blend with the chlorosulfonated polyethylene elastomer.
- Terpolyme rs of ethylene-propylene include commercially available rubbers produced by the copolymerization of ethylene and propylene together with minor proportions of dienes such as ethylidiene norbornene, or dicyclopen- I Sulfur-bearing curing systems for the chlorosulfo.- nated polyethylene (Hypalon), and ethylene-propylene terpolymers, are conventional and well known in the art, for
- tetrainethylthiuram disultide (METHYL TUADS), tetraethylthiuram disulfide (ETHYL TUADS), dipentamethylene thiuram tetrasulfide (SULFADS), and the like commercial sulfur bearing curing agents.
- the sulfur curable chlorosulfonated polyethylene elastomer can be easily rendered electroconductive to any appropriate degree desired by the filling or inclusion therethroughout of a suitable amount of an electrical conductivity imparting agent, such as about to 75 parts of carbon black or metal particles by weight of the polymeric ingredients according to conventional practices.
- the chlorosulfonated polyethylene When aptly rendered electroconductive with a suitable amount of a conductive material, dispersed therethroughout, the chlorosulfonated polyethylene can fulfill the required electrical functions of a semiconducting material in electrical cable, and when combined with an ethylenecontaining polymer insulation and cured in accordance with requirements of this invention, it provides the unique interfacial properties which effectively eliminate the occurrence of intermediate void spaces between the interfaces of insulation and semiconductive materials and also enables an easy and clean separation of the semiconductive material from the insulation.
- the ethylene-containing polymeric material or phase of the combination of this invention is curable to a substantially thermoset condition by cross-linking with a free radical forming peroxide according to conventional practices such as described in U.S. Pat. Nos. 2,888,424 and 3,079,370, and subsequent relevant prior art.
- a preferred cross-linking curing system for the ethylene-containing polymeric material comprises the use of a tertiary peroxide curing agent such as a dicumyl peroxide.
- At least one of the polymeric bodies or phases either the peroxide curable ethylene-containing polymer or the sulfur curable chlorosulfonated polyethylene, undergoes curing while the surface thereof is in intimate physical contact with the surface of the other polymeric body or phase whereby the curing mechanism of one phase can effect the apparent bonds bridging the surfaces to adheringly unite the contacting surfaces of the interface.
- FIG. 1 a typical cable of mediumto-high voltage capacity of the type to which this invention is especially applicable and advantageous, is shown in perspective in FIG. 1, and a short portion of such a 'cable is also shown with the insulation and semiconductive layer in longitudinal cross section about the conductor in FIG. 2.
- the overall cable product 10 primarily comprises a metallic conductor 12, a relatively thick first body ofa peroxide cured ethylene-containing polymeric insulation 14 surrounding the conductor; and overlying the insulation is a second body or layer of a sulfur cured chlorosulfonated polyethylene semiconductive material 16.
- Other components can be in cluded in the cable structure following known designs,
- the following comprise specific examples of suitable and preferred polymeric materials for the application of this invention in the construction of high-voltage cable comprising a body of peroxide curable polyethylene insulation combined with an overlying body of semiconductive material of a polymeric carrier or matrix comprising sulfur curable chlorosulfonated polyethylene elastomer filled with particulate conductive material.
- the ethylene-containing polymer composition comprising the insulation, or one phase or polymeric body of the combination of this invention, consisted of the following typical commercial insulating formula:
- di 0:- cumyl peroxide These ingredients were compounded in a suitable mixer comprising a roll mill, until substantially homogeneously dispersed. However, pursuant to conventional practices, all ingredients, except for the peroxide, were first admixed at elevated temperatures of about 250F, or within a range of about 200F to 300F, to flux the polymer and expedite the mixing. Thereafter the mix was cooled to below the decomposition temperature of the particular peroxide curing agent, in this case down to below about 220F, whereupon the peroxide curing agent was added and dispersed through the mix. The compound was then ready for forming to a given shape and curing by the application of heat.
- the following comprises examples of the sulfurcured chlorosulfonated polyethylene elastomer, which as a body or layer in combination with a body or layer of peroxide-cured ethylene-containing polymer, produces the unique interface characteristics of this invention.
- the sulfur curable chlorosulfonated polyethylene component is filled with an electrically conductive carbon black for the purpose of pereach of the specimens were found to separate clean and free of any residue.
- Agerite Resin D N,N'-m-phenylenedimaleimide duPont HVA-2 0.5 0.6 0.5 0.5 Curing agent-dipentamethylene thiuram hexasulfide- 0.6 0.6 0.6 0.6 0.6
- An insulated metallic electrical conductor having a covering thereon comprising, a combination of polymeric compositions including a composite of an electrically-insulating body of a peroxide-cured product ofan ethylene-containing polymer with a surface adheringly joined to a contacting surface of an easily and cleanly strippable overlying semi-conductive body of a sulfurcured product of an elastomer of chlorosulfonated polyethylene, with said contacting surfaces of the insulating body and overlying semiconductive body being adheringly joined to each other as a result of at least one of said polymeric materials having been cured while the said surfaces of each of the bodies are in adjoining physical contact with each other.
- the insulated metallic electrical conductor of claim 1, wherein the semiconductive body of a sulfurcured product of an elastomer of chlorosulfonated polyethylene includes up to about 30% by weight of an ethylenepropylene terpolymer.
- the semiconductive body of a sulfurcured product of an elastomer of chlorosulfonated polyethylene includes up to about 20% by weight of an ethylene-propylene copolymer.
- An insulated metallic electrical conductor having a covering thereon comprising, a combination of polymeric compositions including a composite of an electrically insulating body of a peroxide-cured product of polyethylene and an organic tertiary peroxide curing agent, with a surface thereof adheringly joined to a contacting surface of an easily and cleanly strippable overlying semiconductive body of a sulfur-cured product of an elastomer of chlorosulfonated polyethylene and a sulfur-containing curing agent having an electrically conductive filler dispersed therethroughout in an amount of about to about 75% by weight of the clastomer, said contacting surfaces of the insulating body ylene and propylene.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Organic Insulating Materials (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Insulated Conductors (AREA)
- Conductive Materials (AREA)
Priority Applications (16)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US422326A US3909507A (en) | 1973-12-06 | 1973-12-06 | Electrical conductors with strippable polymeric materials |
ZA00747417A ZA747417B (en) | 1973-12-06 | 1974-11-19 | Strippable composite of polymeric materials for use in insulated electrical conductors and products thereof and method of rpoducing same |
AU75600/74A AU7560074A (en) | 1973-12-06 | 1974-11-21 | Strippable composite of polymeric materials |
CA214,540A CA1013441A (en) | 1973-12-06 | 1974-11-25 | Strippable composite of polymeric materials for use in insulated electrical conductors, and products thereof and method of producing same |
NL7415794A NL7415794A (nl) | 1973-12-06 | 1974-12-04 | Samengesteld produkt met een afneembare laag uit polymere materialen voor gebruik bij geiso- leerde elektrische geleiders, produkten die dit samengestelde produkt bevatten, alsmede werk- wijze voor de vervaardiging daarvan. |
ES432617A ES432617A1 (es) | 1973-12-06 | 1974-12-05 | Perfeccionamientos introducidos en conductores electricos metalicos aislados. |
IT30211/74A IT1026812B (it) | 1973-12-06 | 1974-12-05 | Composizione strappabile di materiali plimerici per l impiego in conduttori elettrici isolati e procedimento per la produzione di detti conduttori |
SE7415274A SE7415274L (xx) | 1973-12-06 | 1974-12-05 | |
DK632674A DK632674A (xx) | 1973-12-06 | 1974-12-05 | |
DE19742457402 DE2457402A1 (de) | 1973-12-06 | 1974-12-05 | Ausziehbarer verbundstoff aus polymeren materialien zum gebrauch bei isolierten elektrischen leitern sowie verfahren zu dessen herstellung |
JP49138914A JPS5090680A (xx) | 1973-12-06 | 1974-12-05 | |
NO744396A NO744396L (xx) | 1973-12-06 | 1974-12-05 | |
FR7439852A FR2253622B1 (xx) | 1973-12-06 | 1974-12-05 | |
BE151268A BE823074A (fr) | 1973-12-06 | 1974-12-06 | Composite facilement pelable a base de polymere d'ethylene durci au peroxyde et de polyethylene chlorosulfone durci au soufre |
BR10262/74A BR7410262A (pt) | 1973-12-06 | 1974-12-09 | Peca composta separavel de materiais polimericos para uso em condutores eletricos isolados e seus produtos e processo de producao dos mesmos |
ES451607A ES451607A1 (es) | 1973-12-06 | 1976-09-16 | Metodo de producir un conductor electrico aislado y blindadoelectricamente. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US422326A US3909507A (en) | 1973-12-06 | 1973-12-06 | Electrical conductors with strippable polymeric materials |
Publications (1)
Publication Number | Publication Date |
---|---|
US3909507A true US3909507A (en) | 1975-09-30 |
Family
ID=23674390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US422326A Expired - Lifetime US3909507A (en) | 1973-12-06 | 1973-12-06 | Electrical conductors with strippable polymeric materials |
Country Status (15)
Country | Link |
---|---|
US (1) | US3909507A (xx) |
JP (1) | JPS5090680A (xx) |
AU (1) | AU7560074A (xx) |
BE (1) | BE823074A (xx) |
BR (1) | BR7410262A (xx) |
CA (1) | CA1013441A (xx) |
DE (1) | DE2457402A1 (xx) |
DK (1) | DK632674A (xx) |
ES (2) | ES432617A1 (xx) |
FR (1) | FR2253622B1 (xx) |
IT (1) | IT1026812B (xx) |
NL (1) | NL7415794A (xx) |
NO (1) | NO744396L (xx) |
SE (1) | SE7415274L (xx) |
ZA (1) | ZA747417B (xx) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4075421A (en) * | 1975-12-23 | 1978-02-21 | General Electric Company | Direct current cable with resistivity graded insulation, and a method of transmitting direct current electrical energy |
US4140818A (en) * | 1977-09-19 | 1979-02-20 | United States Steel Corporation | Freely strippable electrical cable insulation composition and method |
US4275319A (en) * | 1979-06-01 | 1981-06-23 | Trw Inc. | Oil-filled submergible electric pump motor with improved stator winding insulation |
US4454709A (en) * | 1982-03-12 | 1984-06-19 | General Electric Company | Method of forming concentric cable layer and article formed |
US5225635A (en) * | 1991-11-08 | 1993-07-06 | Cooper Industries, Inc. | Hermetic lead wire |
US5506060A (en) * | 1981-11-13 | 1996-04-09 | The Boeing Company | Method for making multidimensional ether or ester oligomers |
US5554769A (en) * | 1987-09-03 | 1996-09-10 | The Boeing Company | Extended end cap monomer for making advanced composites |
US5573854A (en) * | 1981-11-13 | 1996-11-12 | The Boeing Company | Composites made from multidimensional oligomers |
US5587105A (en) * | 1988-03-15 | 1996-12-24 | Sheppard; Clyde H. | Methods for making liquid molding compounds using diamines and dicyanates |
US5602226A (en) * | 1985-04-23 | 1997-02-11 | The Boeing Company | Method of making multidimensional polyesters |
US5610317A (en) * | 1985-09-05 | 1997-03-11 | The Boeing Company | Multiple chemically functional end cap monomers |
US5705574A (en) * | 1983-09-27 | 1998-01-06 | The Boeing Company | Method for making a polyimide blend |
US5739256A (en) * | 1985-04-23 | 1998-04-14 | The Boeing Company | Method for making multidimensional polyester oligomers |
US5817744A (en) * | 1988-03-14 | 1998-10-06 | The Boeing Company | Phenylethynyl capped imides |
US5969079A (en) * | 1985-09-05 | 1999-10-19 | The Boeing Company | Oligomers with multiple chemically functional end caps |
GB2385055B (en) * | 2000-10-11 | 2005-06-29 | Therm O Disc Inc | Conductive polymer compositions containing n-n-m-phenylenedimaleimide and devices |
WO2011152969A1 (en) * | 2010-06-03 | 2011-12-08 | Dow Global Technologies Llc | Strippable insulation shield for cables |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4990231A (en) * | 1981-06-12 | 1991-02-05 | Raychem Corporation | Corrosion protection system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3571490A (en) * | 1970-01-16 | 1971-03-16 | Anaconda Wire & Cable Co | Flame resistant electric cable |
US3646248A (en) * | 1971-02-22 | 1972-02-29 | Anaconda Wire & Cable Co | Electric cable |
US3793476A (en) * | 1973-02-26 | 1974-02-19 | Gen Electric | Insulated conductor with a strippable layer |
-
1973
- 1973-12-06 US US422326A patent/US3909507A/en not_active Expired - Lifetime
-
1974
- 1974-11-19 ZA ZA00747417A patent/ZA747417B/xx unknown
- 1974-11-21 AU AU75600/74A patent/AU7560074A/en not_active Expired
- 1974-11-25 CA CA214,540A patent/CA1013441A/en not_active Expired
- 1974-12-04 NL NL7415794A patent/NL7415794A/xx unknown
- 1974-12-05 ES ES432617A patent/ES432617A1/es not_active Expired
- 1974-12-05 JP JP49138914A patent/JPS5090680A/ja active Pending
- 1974-12-05 SE SE7415274A patent/SE7415274L/xx unknown
- 1974-12-05 DE DE19742457402 patent/DE2457402A1/de active Pending
- 1974-12-05 FR FR7439852A patent/FR2253622B1/fr not_active Expired
- 1974-12-05 NO NO744396A patent/NO744396L/no unknown
- 1974-12-05 DK DK632674A patent/DK632674A/da unknown
- 1974-12-05 IT IT30211/74A patent/IT1026812B/it active
- 1974-12-06 BE BE151268A patent/BE823074A/xx unknown
- 1974-12-09 BR BR10262/74A patent/BR7410262A/pt unknown
-
1976
- 1976-09-16 ES ES451607A patent/ES451607A1/es not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3571490A (en) * | 1970-01-16 | 1971-03-16 | Anaconda Wire & Cable Co | Flame resistant electric cable |
US3646248A (en) * | 1971-02-22 | 1972-02-29 | Anaconda Wire & Cable Co | Electric cable |
US3793476A (en) * | 1973-02-26 | 1974-02-19 | Gen Electric | Insulated conductor with a strippable layer |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4075421A (en) * | 1975-12-23 | 1978-02-21 | General Electric Company | Direct current cable with resistivity graded insulation, and a method of transmitting direct current electrical energy |
US4140818A (en) * | 1977-09-19 | 1979-02-20 | United States Steel Corporation | Freely strippable electrical cable insulation composition and method |
US4275319A (en) * | 1979-06-01 | 1981-06-23 | Trw Inc. | Oil-filled submergible electric pump motor with improved stator winding insulation |
US5506060A (en) * | 1981-11-13 | 1996-04-09 | The Boeing Company | Method for making multidimensional ether or ester oligomers |
US5573854A (en) * | 1981-11-13 | 1996-11-12 | The Boeing Company | Composites made from multidimensional oligomers |
US5714566A (en) * | 1981-11-13 | 1998-02-03 | The Boeing Company | Method for making multiple chemically functional oligomers |
US4454709A (en) * | 1982-03-12 | 1984-06-19 | General Electric Company | Method of forming concentric cable layer and article formed |
US5705574A (en) * | 1983-09-27 | 1998-01-06 | The Boeing Company | Method for making a polyimide blend |
US6583255B1 (en) | 1985-04-23 | 2003-06-24 | The Boeing Company | Polyester oligomer |
US5739256A (en) * | 1985-04-23 | 1998-04-14 | The Boeing Company | Method for making multidimensional polyester oligomers |
US5602226A (en) * | 1985-04-23 | 1997-02-11 | The Boeing Company | Method of making multidimensional polyesters |
US5618907A (en) * | 1985-04-23 | 1997-04-08 | The Boeing Company | Thallium catalyzed multidimensional ester oligomers |
US5610317A (en) * | 1985-09-05 | 1997-03-11 | The Boeing Company | Multiple chemically functional end cap monomers |
US5756597A (en) * | 1985-09-05 | 1998-05-26 | The Boeing Company | Multiple chemically functional oligomer blends |
US5969079A (en) * | 1985-09-05 | 1999-10-19 | The Boeing Company | Oligomers with multiple chemically functional end caps |
US5554769A (en) * | 1987-09-03 | 1996-09-10 | The Boeing Company | Extended end cap monomer for making advanced composites |
US5817744A (en) * | 1988-03-14 | 1998-10-06 | The Boeing Company | Phenylethynyl capped imides |
US5587105A (en) * | 1988-03-15 | 1996-12-24 | Sheppard; Clyde H. | Methods for making liquid molding compounds using diamines and dicyanates |
US5225635A (en) * | 1991-11-08 | 1993-07-06 | Cooper Industries, Inc. | Hermetic lead wire |
GB2385055B (en) * | 2000-10-11 | 2005-06-29 | Therm O Disc Inc | Conductive polymer compositions containing n-n-m-phenylenedimaleimide and devices |
WO2011152969A1 (en) * | 2010-06-03 | 2011-12-08 | Dow Global Technologies Llc | Strippable insulation shield for cables |
US8889992B2 (en) | 2010-06-03 | 2014-11-18 | Dow Global Technologies Llc | Strippable insulation shield for cables |
Also Published As
Publication number | Publication date |
---|---|
SE7415274L (xx) | 1975-06-09 |
JPS5090680A (xx) | 1975-07-19 |
BR7410262A (pt) | 1976-06-29 |
BE823074A (fr) | 1975-04-01 |
DK632674A (xx) | 1975-07-21 |
NL7415794A (nl) | 1975-06-10 |
DE2457402A1 (de) | 1975-06-12 |
ZA747417B (en) | 1975-12-31 |
IT1026812B (it) | 1978-10-20 |
ES432617A1 (es) | 1977-03-01 |
ES451607A1 (es) | 1977-08-01 |
FR2253622B1 (xx) | 1979-06-15 |
AU7560074A (en) | 1976-05-27 |
FR2253622A1 (xx) | 1975-07-04 |
CA1013441A (en) | 1977-07-05 |
NO744396L (xx) | 1975-06-30 |
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