US3725330A
Expired / Lapsed
US
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Self-adhesive insulating composition
Assignee: SWCC Corp
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Filing: 1970-04-02
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Granted: 1973-04-03
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Expires: 1990-04-02
Abstract
Abstract A self-adhesive insulating tape excellent in electrical properties and weather resistance can be prepared by shaping into a sheet a novel composition comprising (A) an ethylene-propylenediene terpolymer, (B) an ethylene-propylene copolymer, (C) a tackifier selected from the group consisting of low molecular weight polyisobutylenes, terpene resins, coumarone-indene resins and novolak type phenol resins, (D) an inorganic filler and (E) a vulcanizing agent capable of vulcanizing only the ethylenepropylene-diene terpolymer in this composition, vulcanizing the sheet and then cutting it to a given width. Said self-adhesive insulating tape is extremely suitable for forming insulating layers in connecting high voltage cables or in treating terminals.
Inventors
- 👤 S Seizo
- 👤 A Shirato
- 👤 N Hitoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:59
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C; C08; C08K; C08K5/00; C08K5/04; C08K5/14; C08L; C08L23/00; C08L23/02; C08L23/16; C08L23/18; C08L23/20; C08L23/22; C08L45/00; C08L45/02; C08L57/00; C08L57/02; C08L2203/00; C08L2203/20; C08L2203/202; C08L2205/00; C08L2205/02; C08L2205/025; C08L2205/03; C08L2312/00; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
42 words
A composition according to claim 1, wherein the Alpha -olefin polymer (B) is an ethylene-propylene copolymer which is composed of ethylene and propylene in an ethylene:propylene molar ratio of 60:40 to 40:60 and which has a Mooney viscosity of 20 to 120.
Claim 2
Dependent Claim
24 words
A composition according to claim 1, wherein the Alpha -olefin polymer (B) is a polyisobutylene having an average molecular weight of 50,000 to 110,000.
Claim 3
Dependent Claim
57 words
A composition according to claim 1, wherein the tackifier is a polyisobutylene having an average molecular weight of 300 to 10,000 or a terpene resin having an average molecular weight of 300 to 3,000 and the amount thereof contained in the composition is 30 to 50 parts by weight per 100 parts by weight of the terpolymer.
Claim 4
Dependent Claim
14 words
A composition according to claim 4, which is in the form of a tape.
Claim 5
Dependent Claim
207 words
A self-adhesive insulating composition comprising: A. 100 parts by weight of an ethylene-propylene-diene terpolymer which is composed of ethylene and propylene in an ethylene: propylene molar ratio of 40:60 to 80:20 and a diene component in an amount of 0.5 - 10 mole percent based on the total amount of ethylene and propylene and which has a Mooney viscosity (ML1 4, 100*C.) of 20 - 120, B. 90 - 110 parts by weight of an Alpha -olefin polymer selected from the group consisting of ethylene-propylene copolymers which are composed of ethylene and propylene in an ethylene:propylene molar ratio of 60:40 to 40:60 and which have a Mooney viscosity (ML1 4, 100*C.) of 20 - 120 and polyisobutylene having an average molecular weight of 50,000 -110,000, C. 30 - 50 parts by weight of a tackifier selected from the group consisting of polyisobutylenes having an average molecular weight of 300 - 10,000 and terpene resins having an average molecular weight of 300 - 3,000, D. 50 - 200 parts by weight of an inorganic filler having an average particle diameter of 0.5 - 50 Mu , and E. 1 - 20 parts by weight of a vulcanizing agent capable of vulcanizing only the ethylene-propylene-diene terpolymer in this composition.
Claim 6
Dependent Claim
79 words
The self-adhesive and self-fusing electrical insulating tape according to claim 1, wherein said Alpha -olefin polymer is an ethylene-propylene copolymer which is composed of ethylene and propylene in an ethylene:propylene molar ratio of 60:40 to 40:60 and which has a Mooney viscosity (ML1 4100*C) of 20-120 and said vulcanizing agent is selected from the group consisting of sulfur and a vulcanizing accelerator, p-quinone dioxime, p''-benzoyl quinone dioxime, a phenolic resin type vulcanizing agent and stannic chloride, and combinations thereof.
Claim 7
Dependent Claim
27 words
The self-adhesive and self-fusing electrical insulating tape according to claim 7, wherein said vulcanizing accelerator is selected from the group consisting of mercaptobenzothiazole, dimercaptobenzothiazole, and tetramethylthiuram monosulfide.
Claim 8
Dependent Claim
46 words
The self-adhesive and self-fusing electrical insulating tape according to claim 3, wherein said vulcanizing agent is selected from the group consisting of sulfur and a vulcanizing accelerator, p-quinone dioxime, p''-benzoyl quinone dioxime, a phenolic resin type vulcanizing agent and stannic chloride, a peroxide and combinations thereof.
Claim 9
Dependent Claim
26 words
The self-adhesive and self-fusing electrical insulating tape according to claim 9, wherein said peroxide is selected from the group consisting of dicumyl peroxide or t-butyl peroxide.
Claim 10
Dependent Claim
53 words
The self-adhesive and self-fusing electrical insulating tape according to claim 1, wherein said vulcanizing agent is a combination of sulfur with a vulcanizing accelerator in an amount of 0.1-3 parts by weight of sulfur and 0.5-3.5 parts by weight of said vulcanization accelerator, based on 100 parts by weight of said ethylene-propylene-diene terpolymer.
Claim 11
Dependent Claim
50 words
The self-adhesive and self-fusing electrical insulating tape according to claim 1, wherein said vulcanizing agent is selected from the group consisting of p-quinone dioxime and p,p''-benzoyl quinone dioxime and the amount of said vulcanizing agent is 3-7 parts by weight based on 100 parts by weight of the ethylene-propylene-diene terpolymer.
Claim 12
Dependent Claim
57 words
THe self-adhesive and self-fusing electrical insulating tape according to claim 1, wherein said vulcanizing agent is a combination of a phenolic resin type vulcanizing agent with stannic chloride and said vulcanizing agent is used in an amount of 7-12 parts by weight of said resin type vulcanizing agent and 3-7 parts by weight of said stannic chloride.
Claim 13
Dependent Claim
25 words
The self-adhesive and self-fusing electrical insulating tape according to claim 13, wherein said resin type vulcanizing agent is a phenol resin type bromomethyl phenol-aldehyde resin.
Claim 14
Dependent Claim
56 words
The self-adhesive and self-fusing electrical insulating tape according to claim 1, wherein said vulcanizing agent is a peroxide and said Alpha -olefin polymer is a polyisobutylene having a average molecular weight of 50,000 to 110,000, said peroxide being used in an amount of 2-4 parts by weight, based on 100 parts by weight of ethylene-propylene-diene terpolymer.
Claim 15
Dependent Claim
37 words
The self-adhesive and self-fusing electrical insulating tape according to claim 1, wherein a metal oxide in an amount of 2-20 parts weight per 100 parts by weight of the ethylene-propylene-diene terpolymer is used as a vulcanization adjuvant.
Claim 16
Dependent Claim
28 words
The self-adhesive and self-fusing electrical insulating tape according to claim 16, wherein said metal oxide is selected from the group consisting of ZnO, PbO, Pb3O4, MgO, and CdO.
Claim 17
Dependent Claim
16 words
The self-adhesive and self-fusing electrical insulating tape according to claim 1, wherein an antioxidant is present.
Claim 18
Dependent Claim
16 words
The self-adhesive and self-fusing electrical insulating tape according to claim 1, wherein a pigment is present.
Claim 19
Dependent Claim
16 words
The self-adhesive and self-fusing electrical insulating tape according to claim 1, wherein a softener is present.
Claim 20
Dependent Claim
77 words
The self-adhesive insulating composition according to claim 6, wherein said Alpha -olefin polymer is an ethylene-propylene copolymer which is composed of ethylene and propylene in an ethylene:propylene molar ratio of 60:40 to 40:60 and which was a Mooney viscosity (ML1 14, 100*C) of 20-120 and said vulcanizing agent is selected from the group consisting of sulfur and a vulcanizing accelerator, p-quinone dioxime, p''-benzoyl quinone dioxime, a phenolic resin type vulcanizing agent and stannic chloride, and combinations thereof.
Claim 21
Dependent Claim
24 words
The self-adhesive insulating composition according to claim 21, wherein said vulcanizing accelerator is selected from the group consisting of mercaptobenzothiazole, dimercaptobenzothiazole, and tetramethylthiraum monosulfide.
Claim 22
Dependent Claim
50 words
The self-adhesive insulating composition according to claim 6, wherein said Alpha -olefin is the polyisobutylene and said vulcanizing agent is selected from the group consisting of sulfur and a vulcanizing accelerator, p-quinone dioxime, p''-benzoyl quinone dioxime, a phenolic resin type vulcanizing agent and stannic chloride, a peroxide and combinations thereof.
Claim 23
Dependent Claim
23 words
The self-adhesive insulating composition according to claim 23, wherein said peroxide is selected from the group consisting of dicumyl peroxide and t-butyl peroxide.
Claim 24
Dependent Claim
50 words
The self-adhesive insulating composition according to claim 6, wherein said vulcanizing agent is a combination of sulfur with a vulcanizing accelerator in an amount of 0.1-3 parts by weight of sulfur and 0.5-3.5 parts by weight of said vulcanization accelerator, based on 100 parts by weight of said ethylene-propylene-diene terpolymer.
Claim 25
Dependent Claim
47 words
The self-adhesive insulating composition according to claim 6, wherein said vulcanizing agent is selected from the group consisting of p-quinone dioxime and p,p''-benzoyl quinone dioxime and the amount of said vulcanizing agent is 3.7 parts by weight based on 100 parts by weight of the ethylene-propylene-diene terpolymer.
Claim 26
Dependent Claim
53 words
The self-adhesive insulating composition according to claim 6, wherein said vulcanizing agent is combination of a phenolic resin type vulcanizing agent with sTannic chloride and said vulcanizing agent is used in an amount of 7-12 parts by weight of said resin type vulcanizing agent and 3-7 parts by weight of said stannic chloride.
Claim 27
Dependent Claim
22 words
The self-adhesive insulating composition according to claim 27, wherein said resin type vulcanizing agent is a phenol resin type bromomethyl phenol-aldehyde resin.
Claim 28
Dependent Claim
52 words
The self-adhesive insulating composition according to claim 6, wherein said vulcanizing agent is a peroxide and said Alpha -olefin polymer is a polyisobutylene having an average molecular weight of 50,000 to 110,000 said peroxide being used in an amount of 2-4 parts by weight, based on 100 parts by weight of ethylene-propylene-diene-terpolymer.
Claim 29
Dependent Claim
35 words
The self-adhesive insulating composition according to claim 6, wherein a metal oxide in an amount of 2-20 parts by weight per 100 parts by weight of the ethylene-propylene-diene terpolymer is used as a vulcanization adjuvant.
Claim 30
Dependent Claim
25 words
The self-adhesive insulating composition according to claim 30, wherein said metal oxide is selected from the group consisting of ZnO, PbO, Pb3O4, MgO, and CdO.
Claim 31
Dependent Claim
13 words
The self-adhesive insulating composition according to claim 6, wherein an antioxidant is present.
Claim 32
Dependent Claim
13 words
The self-adhesive insulating composition according to claim 6, wherein a pigment is used.
Claim 33
Dependent Claim
13 words
The self-adhesive insulating composition according to claim 6, wherein a softener is used.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |