US3536626A - Compositions for filling electrical connectors of mineral oil,polyethylene,petroleum resin and dioctyl sebacate - Google Patents
Compositions for filling electrical connectors of mineral oil,polyethylene,petroleum resin and dioctyl sebacate Download PDFInfo
- Publication number
- US3536626A US3536626A US705322A US3536626DA US3536626A US 3536626 A US3536626 A US 3536626A US 705322 A US705322 A US 705322A US 3536626D A US3536626D A US 3536626DA US 3536626 A US3536626 A US 3536626A
- Authority
- US
- United States
- Prior art keywords
- composition
- polyethylene
- parts
- mineral oil
- conductors
- 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
Links
- 239000000203 mixture Substances 0.000 title description 42
- 239000004698 Polyethylene Substances 0.000 title description 13
- 229920000573 polyethylene Polymers 0.000 title description 13
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 title description 6
- 239000002480 mineral oil Substances 0.000 title description 6
- 235000010446 mineral oil Nutrition 0.000 title description 6
- 239000003208 petroleum Substances 0.000 title description 5
- 239000011347 resin Substances 0.000 title description 5
- 229920005989 resin Polymers 0.000 title description 5
- 239000004020 conductor Substances 0.000 description 19
- -1 polyethylene Polymers 0.000 description 13
- 238000006116 polymerization reaction Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 3
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 3
- 229910052794 bromium Inorganic materials 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 229910052740 iodine Inorganic materials 0.000 description 3
- 239000011630 iodine Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 229940112822 chewing gum Drugs 0.000 description 1
- 235000015218 chewing gum Nutrition 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000012262 resinous product Substances 0.000 description 1
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical group [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- H01B3/441—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 alkenes
Definitions
- the invention relates to dielectric compositions useful for filling electrical connectors, principally for the purpose of excluding moisture.
- the connectors containing the present composition have particular application for splicing the conductors of telephone cables. In use, the ends of telephone conductors are inserted into a plastic tube containing our composition.
- An example of a connector of the type for which our composition is useful is described in DAscoli Pat. 2,906,810, issued in 1959. This patent describes a splice where the conductors are bared and twisted together. More recently, however, connectors have been developed, such as that described in Smith Pat.
- our composition contain 5 to 15, and preferably 8 to 12, parts by weight of dioctyl sebacate, and that it shall pour freely at 190 F. but be free from flow at 140 F.
- a composition was prepared by heating 45 parts of Sun XX mineral oil, which is available from the Sun Oil Company, to 250 F.
- Sun XX oil has a specific gravity, at 60 F., of .922 to .934, a flash point of 460 to 470 R, an SU viscosity, at 210 F., of 104 to 132 seconds, a maximum pour point of 15 F.; and an aromatic content of 38 to 51%.
- the mineral oil in our composition is used as a solvent for the polyethylene moiety and its selection is not critical so long as it has a Saybolt Universal (SU) viscosity at 210 F. between 55 and 135 seconds and a pour point between 5 and 20 F., and is present to a weight percent between 30 and 55 and preferably between 42 and 46, of the composition.
- SU Saybolt Universal
- the Piccopale 100 is available from Pennsylvania Industrial Chemical Corporation and is obtained by the Catalytic polymerization of a mixture of monomers derived from deep cracking petroleum.
- the monomers have a. molecular weight of approximating 90, and are com posed essentially of dienes and reactive olefins.
- the resin has a ball and ring softening point of about 100 C., a specific gravity at 25 C. of .970 to .975, a refractive index at 20 C. of 1.5116, an acid number less than 1.0, a Wijs iodine value of about 120, a bromine number of about 7.3, and a molecular weight of about 1100.
- the weight percent of Piccopale may include as few as 20 and as many as 40 parts of this resin.
- composition of the example was found to have a Gardner viscosity, at 212 F., of 312 centipoises and was tested as follows:
- Corrosion test -Cpper and aluminum conductors and brass and tinned bronze connector parts were coated with the composition of the example and maintained at 150 F. for 14 days. Thereafter the metal parts were examined and found to be free from any signs of corrosion.
- a homogeneous composition for filling electrical connectors consisting essentially of:
- composition of claim 1 wherein the parts by weight of said polyethylene are 12 to 16, the parts by weight of said resinous polymerization product are 28 to 33, and the parts by weight of said dioctyl se bacate are 8 to 12.
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Organic Insulating Materials (AREA)
Description
United States Patent.
US. Cl. 252-64 2 Claims ABSTRACT OF THE DISCLOSURE A composition of mineral oil, polyethylene, petroleum resin and dioctyl sebacate is used to fill electrical connectors.
BACKGROUND OF THE INVENTION Our invention relates to dielectric compositions useful for filling electrical connectors, principally for the purpose of excluding moisture. The connectors containing the present composition have particular application for splicing the conductors of telephone cables. In use, the ends of telephone conductors are inserted into a plastic tube containing our composition. An example of a connector of the type for which our composition is useful is described in DAscoli Pat. 2,906,810, issued in 1959. This patent describes a splice where the conductors are bared and twisted together. More recently, however, connectors have been developed, such as that described in Smith Pat. 3,265,807, where the ends of the conductors are not stripped and twisted together, but merely inserted into the connector tube and electrical connection is made by compressing a pronged metal sleeve over both conductors. The prongs pierce the insulation of both conductors when the entire connector is pressed between the jaws of an appropriate tool.
In Pat. 2,914,501, DAscoli, one of the inventors of the present composition, described a composition suitable for filling connectors of the type where the conductors are twisted together. This composition, which is described in the patent as having the body of chewed chewing gum, has the deficiency that, when it is attempted to insert small telephone conductors, such as number 26 AWG copper telephone conductors into a connector, the conductors buckle rather than penetrate the stiff composition. This is particularly troublesome where the conductors are inserted parallel, rather than being twisted together, since the twisted conductors for which the stifier composition was intended, have, of course, a much greater rigidity than two conductors laid parallel. In the practical use of our invention many hundreds of splices are required to be made by high-cost labor within a short time and any delays caused by difficulties in inserting conductors into the connectors will be fatal to the commercial success of a splice or splicing method. At the same time it is required that the connector composition should wet the surface of metal conductors, particularly copper and aluminum and also wet the surface of polyethylene and other plastics such as polyvinyl chloride. Polyethylene, particularly, has been hard to wet with compounds of known composition.
It was, therefore, required to discover a softer composition with excellent moisture resistance and wetting properties, but at the same time it was necessary that this compound should not flow from the connectors in which it was used even at temperatures of 140 F. and as high as 158 F. On the other hand the composition was required to flow freely into the connectors at temperatures lower than the softening point of the compound from which the connector, itself, was fabricated.
SUMMARY We have invented a new composition for filling electrical connectors consisting essentially of 30 to 55, and preferably 42 to 46, parts by weight of mineral oil with a viscosity at 210 F. of 50-150 seconds; 5 to 20, and preferably 12 to 16, parts by weight of polyethylene having a molecular weight of 5,000 to 10,000; and 20 to 40, and preferably 28 to 33, parts by weight of a resinous polymerization product obtained by the catalytic polymerization of a mixture of unsaturated monomers derived from deep cracking petroleum. This resinous product has a ball and ring softening point of about C., a specific gravity at 25 C. of .970 to .975, a refractive index at 20 C. of about 1.5116, an acid number less than 1.0, a Wijs iodine value of about 120, a bromine number of about 73 and a molecular weight of about 1100. In addition, it is essential that our composition contain 5 to 15, and preferably 8 to 12, parts by weight of dioctyl sebacate, and that it shall pour freely at 190 F. but be free from flow at 140 F.
EXAMPLE Description of preferred embodiments A composition was prepared by heating 45 parts of Sun XX mineral oil, which is available from the Sun Oil Company, to 250 F. Sun XX oil has a specific gravity, at 60 F., of .922 to .934, a flash point of 460 to 470 R, an SU viscosity, at 210 F., of 104 to 132 seconds, a maximum pour point of 15 F.; and an aromatic content of 38 to 51%. The mineral oil in our composition is used as a solvent for the polyethylene moiety and its selection is not critical so long as it has a Saybolt Universal (SU) viscosity at 210 F. between 55 and 135 seconds and a pour point between 5 and 20 F., and is present to a weight percent between 30 and 55 and preferably between 42 and 46, of the composition.
In the further preparation of the composition of the Example 15 parts of Union Carbide DYGT polyethylene was added and dissolved in the hot oil. The molecular weight of this polyethylene is about 7,000 but we believe that polyethylene with molecular weight between 5,000 and 10,000 can be employed for the preparation of our composition. Following the dissolution of the polyethylene, 10 parts of dioctyl sebacate and 30 parts of Piccopale 100 were added to the warm solution. We prefer to maintain the dioctyl sebacate content between 8 and 12 parts but additions as loW as 5 parts and as great as 15 parts can be useful for making connector filling composition according to our invention.
The Piccopale 100 is available from Pennsylvania Industrial Chemical Corporation and is obtained by the Catalytic polymerization of a mixture of monomers derived from deep cracking petroleum. The monomers have a. molecular weight of approximating 90, and are com posed essentially of dienes and reactive olefins. The resin has a ball and ring softening point of about 100 C., a specific gravity at 25 C. of .970 to .975, a refractive index at 20 C. of 1.5116, an acid number less than 1.0, a Wijs iodine value of about 120, a bromine number of about 7.3, and a molecular weight of about 1100. Although we prefer to keep the weight percent of Piccopale between 2 8 and 33 useful compositions may include as few as 20 and as many as 40 parts of this resin.
The above-formulated composition of the example was found to have a Gardner viscosity, at 212 F., of 312 centipoises and was tested as follows:
Environmental stress test-Polyethylene and polypropylene insulated telephone wires, size 24 AWG, were wrapped around their own diameters, coated with our composition, and maintained for 14 days at F. Polyethylene connector sleeves were coated with composition 3 and also held for 14 days at 140 F. Examination under magnification failed to disclose any stress cracking or other deleterious effect on either the conductors or the sleeves.
Corrosion test.-Cpper and aluminum conductors and brass and tinned bronze connector parts were coated with the composition of the example and maintained at 150 F. for 14 days. Thereafter the metal parts were examined and found to be free from any signs of corrosion.
Flow tests.-A one-gram globule of composition was set on a 45 inclined plane, and connectors, filled with composition, were inverted and all held for 72 hours at 158 F. No flow of the composition from the connectors or on the inclined plane was found to have occurred.
Penetration tests.A commercial B-connector was filled with the composition of the example and held for 4 hours at 20 F. Without warming, an AWG 26 insulated telephone wire was inserted into the compound. No buckling of the wire occurred whereas when the same test was made with the composition of Pat. 2,914,501 the same type and size of wire 'buckled upon attempted insertion.
Water immersion test at room temperature.96 2- or 3-conductor splices in AWG 22 and 24 were made with compression type B-connectors filled with the composition of the example. These were immersed in water and tested for resistance between the conductors and water with a standard 600 volt megger. After 48 hours 96% of the specimens showed infinite resistance and after 72 hours 70% of the specimens showed infinite resistance. These results qualify connectors employing our composition for use where water-resistant connectors are required.
We have invented a new and useful composition of which the foregoing description has been exemplary rather than definitive and for which we desire an award of Letters Patent as defined in the following claims.
We claim:
1. A homogeneous composition for filling electrical connectors consisting essentially of:
(A) 30 to parts by weight of mineral oil having a S.U. viscosity at 210 F. of 50-150 seconds,
(B) 5 to 20 parts by weight of polyethylene having a molecular weight of 5,000 to 10,000,
(C) 2.0 to 40 parts by weight of a resinous polymerization product obtained by the catalytic polymerization of a mixture of unsaturated monomers derived from deep cracking petroleum, said resin having a ball and ring. softening point of about C., a specific gravity at 25 C. of .970 to .975, a refractive index at 20 C. of about 1.5116, an acid number less than 1.0, a Wijs iodine value of about a bromine number of about 7.3 and a molecular weight of about 1100, and
(D) 5 to 15 parts by weight of dioctyl sebacate, said composition pouring freely at 190 F. and being free from flow at F.
2. The composition of claim 1 wherein the parts by weight of said polyethylene are 12 to 16, the parts by weight of said resinous polymerization product are 28 to 33, and the parts by weight of said dioctyl se bacate are 8 to 12.
References Cited UNITED STATES PATENTS 2,906,810 9/1959 DAscoli 17487 2,914,501 11/1959 DAscoli 260-33.6 3,265,807 8/1966 Smith 17487 JOHN T. GOOLKASIAN, Primary Examiner M. E. McCAMISH, Assistant Examiner US. Cl. X.R. 260-31.8, 33.6
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70532268A | 1968-02-14 | 1968-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3536626A true US3536626A (en) | 1970-10-27 |
Family
ID=24832952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US705322A Expired - Lifetime US3536626A (en) | 1968-02-14 | 1968-02-14 | Compositions for filling electrical connectors of mineral oil,polyethylene,petroleum resin and dioctyl sebacate |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3536626A (en) |
| GB (1) | GB1168399A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5354210A (en) * | 1991-08-23 | 1994-10-11 | The Whitaker Corporation | Sealant compositions and sealed electrical connectors |
| US5360350A (en) * | 1991-08-23 | 1994-11-01 | The Whitaker Corporation | Sealant compositions and sealed electrical connectors |
| US5844021A (en) * | 1991-08-23 | 1998-12-01 | The Whitaker Corporation | Sealant compositions and sealed electrical connectors |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2906810A (en) * | 1956-02-15 | 1959-09-29 | Anaconda Wire & Cable Co | Insulated electric conductor splice |
| US2914501A (en) * | 1955-12-01 | 1959-11-24 | Anaconda Wire & Cable Co | Reaction product of mineral oil polyisobutylene, polyethylene and resinous petroleum polymerization product |
| US3265807A (en) * | 1964-07-24 | 1966-08-09 | Bell Telephone Labor Inc | Connector for insulated conductors |
-
1968
- 1968-02-14 US US705322A patent/US3536626A/en not_active Expired - Lifetime
- 1968-10-01 GB GB46574/68A patent/GB1168399A/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2914501A (en) * | 1955-12-01 | 1959-11-24 | Anaconda Wire & Cable Co | Reaction product of mineral oil polyisobutylene, polyethylene and resinous petroleum polymerization product |
| US2906810A (en) * | 1956-02-15 | 1959-09-29 | Anaconda Wire & Cable Co | Insulated electric conductor splice |
| US3265807A (en) * | 1964-07-24 | 1966-08-09 | Bell Telephone Labor Inc | Connector for insulated conductors |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5354210A (en) * | 1991-08-23 | 1994-10-11 | The Whitaker Corporation | Sealant compositions and sealed electrical connectors |
| US5360350A (en) * | 1991-08-23 | 1994-11-01 | The Whitaker Corporation | Sealant compositions and sealed electrical connectors |
| US5580265A (en) * | 1991-08-23 | 1996-12-03 | The Whitaker Corporation | Sealant compositions and sealed electrical connectors |
| US5691399A (en) * | 1991-08-23 | 1997-11-25 | The Whitaker Corporation | Sealant composition and sealed electrical connectors |
| US5741843A (en) * | 1991-08-23 | 1998-04-21 | The Whitaker Corporation | Sealant compositions and sealed electrical connectors |
| US5844021A (en) * | 1991-08-23 | 1998-12-01 | The Whitaker Corporation | Sealant compositions and sealed electrical connectors |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1168399A (en) | 1969-10-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: ANACONDA-ERICSSON INC., A CORP. OF DE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ANACONDA COMPANY, THE A CORP. OF DE;REEL/FRAME:003846/0822 Effective date: 19800728 Owner name: ANACONDA-ERICSSON INC., A CORP. OF, DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ANACONDA COMPANY, THE A CORP. OF DE;REEL/FRAME:003846/0822 Effective date: 19800728 |
|
| AS | Assignment |
Owner name: ALCATEL NA, INC., A CORP OF DE., NORTH CAROLINA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ERICSSON, INC.;REEL/FRAME:004923/0892 Effective date: 19880412 Owner name: ALCATEL NA, INC., 100 PENNY ROAD, CLAREMONT, NC., Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ERICSSON, INC.;REEL/FRAME:004923/0892 Effective date: 19880412 |