US4287034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protecting metal substrates from corrosion
Assignee: Raychem Corp
•
Filing: 1979-11-09
•
Granted: 1981-09-01
•
Expires: 1999-11-09
Abstract
Abstract A protective coating adhered to the surface of a metal substrate such as a pipe using an adhesive composition containing an adhesive component and a polyhydroxy compound protects the substrate from corrosion. The adhesive has improved resistance to cathodic disbonding which generally weakens the adhesive bond between the protective coating and the substrate when a current is impressed through the substrate causing it to function as a cathode. The electric current inhibits loss of metal ions from the substrate to the environment thus reducing corrosion of the substrate.
Inventors
- 👤 George Pieslak
- 👤 Kathleen A. Erbes-Mrsny
- 👤 Elena C. Fritchle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:00
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C09; C09J; C09J5/00; F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; Y; Y10; Y10S; Y10S138/00; Y10S138/01; Y10S138/06; Y10S174/00; Y10S174/08; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1352; Y10T428/1355; Y10T428/1359; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2852; Y10T428/2878; Y10T428/2891; Y10T428/2896; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31938
Claims Analysis
Total Claims: 79
Claim 1
Independent Claim
72 words
An article of a heat shrinkable material having coated on at least a part of the surface thereof an adhesive composition comprising an adhesive component and an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least 50 percent of the aliphatic carbon atoms in an amount sufficient to impart improved resistance to cathodic disbondment to the adhesive composition, said adhesive component being a hot melt adhesive or a mastic.
Claim 2
Dependent Claim
72 words
An article of a heat shrinkable material having coated on at least a part of the surface thereof an adhesive composition comprising an adhesive component and an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least 50 percent of the aliphatic carbon atoms in an amount sufficient to impart improved resistance to cathodic disbondment to the adhesive composition, said adhesive component being a hot melt adhesive or a mastic.
Claim 3
Dependent Claim
13 words
An article in accordance with claim 1 wherein said article is a sheet.
Claim 4
Dependent Claim
13 words
An article in accordance with claim 1 wherein said article is a tape.
Claim 5
Dependent Claim
13 words
An article in accordance with claim 1 wherein said article is a sleeve.
Claim 6
Dependent Claim
16 words
An article in accordance with claim 1 wherein said heat shrinkable material is a polymeric material.
Claim 7
Dependent Claim
13 words
An article in accordance with claim 5 wherein said polymeric material is polyethylene.
Claim 8
Dependent Claim
14 words
An article in accordance with claim 5 wherein said polymeric material is cross-linked polyethylene.
Claim 9
Dependent Claim
16 words
An article in accordance with claim 1 wherein said adhesive component is a hot melt adhesive.
Claim 10
Dependent Claim
20 words
An article in accordance with claim 8 wherein said hot melt adhesive comprises an ethylene-ethyl acrylate copolymer hot melt adhesive.
Claim 11
Dependent Claim
20 words
An article in accordance with claim 8 wherein said hot melt adhesive comprises an ethylene-vinyl acetate copolymer hot melt adhesive.
Claim 12
Dependent Claim
13 words
An article in accordance with claim 1 wherein said polyhydroxy compound is glucose.
Claim 13
Dependent Claim
13 words
An article in accordance with claim 1 wherein said polyhydroxy compound is sorbitol.
Claim 14
Dependent Claim
13 words
An article in accordance with claim 1 wherein said polyhydroxy compound is mannitol.
Claim 15
Dependent Claim
14 words
An article in accordance with claim 1 wherein said polyhydroxy compound is polyvinyl alcohol.
Claim 16
Dependent Claim
13 words
An article in accordance with claim 1 wherein said polyhydroxy compound is pentaerythritol.
Claim 17
Dependent Claim
77 words
A pipe having bonded to the surface thereof a polymeric coating, said coating being bonded to said pipe with an adhesive composition comprising an adhesive component and from about 0.01 to about 30 percent by weight, based on the total weight of the adhesive composition, of an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least 50 percent of the aliphatic carbon atoms, said adhesive component being a hot melt adhesive or a mastic.
Claim 18
Dependent Claim
77 words
A pipe having bonded to the surface thereof a polymeric coating, said coating being bonded to said pipe with an adhesive composition comprising an adhesive component and from about 0.01 to about 30 percent by weight, based on the total weight of the adhesive composition, of an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least 50 percent of the aliphatic carbon atoms, said adhesive component being a hot melt adhesive or a mastic.
Claim 19
Dependent Claim
13 words
A pipe in accordance with claim 16 wherein said pipe is of steel.
Claim 20
Dependent Claim
13 words
A pipe in accordance with claim 16 wherein said polymeric coating is polyethylene.
Claim 21
Dependent Claim
14 words
A pipe in accordance with claim 18 wherein said polymeric coating is cross-linked polyethylene.
Claim 22
Dependent Claim
16 words
A pipe in accordance with claim 16 wherein said adhesive component is a hot melt adhesive.
Claim 23
Dependent Claim
20 words
A pipe in accordance with claim 20 wherein said hot melt adhesive is an ethylene-ethyl acrylate copolymer hot melt adhesive.
Claim 24
Dependent Claim
20 words
A pipe in accordance with claim 20 wherein said hot melt adhesive comprises an ethylene-vinyl acetate copolymer hot melt adhesive.
Claim 25
Dependent Claim
13 words
A pipe in accordance with claim 16 wherein said polyhydroxy compound is glucose.
Claim 26
Dependent Claim
13 words
A pipe in accordance with claim 16 wherein said polyhydroxy compound is sorbitol.
Claim 27
Dependent Claim
13 words
A pipe in accordance with claim 16 wherein said polyhydroxy compound is mannitol.
Claim 28
Dependent Claim
14 words
A pipe in accordance with claim 16 wherein said polyhydroxy compound is polyvinyl alcohol.
Claim 29
Dependent Claim
13 words
A pipe in accordance with claim 16 wherein said polyhydroxy compound is pentacrythritol.
Claim 30
Dependent Claim
88 words
A metal pipe which is connected in an electric circuit such that said pipe forms a cathode; said pipe having bonded to the surface thereof a polymeric coating with an intermediate layer of an adhesive comprising an adhesive component and from about 0.01 to about 30 percent by weight, based on the total weight of the composition of an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least 50 percent of the carbon atoms, said adhesive component being a hot melt adhesive or a mastic.
Claim 31
Dependent Claim
88 words
A metal pipe which is connected in an electric circuit such that said pipe forms a cathode; said pipe having bonded to the surface thereof a polymeric coating with an intermediate layer of an adhesive comprising an adhesive component and from about 0.01 to about 30 percent by weight, based on the total weight of the composition of an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least 50 percent of the carbon atoms, said adhesive component being a hot melt adhesive or a mastic.
Claim 32
Dependent Claim
13 words
A pipe in accordance with claim 28 wherein said pipe is of steel.
Claim 33
Dependent Claim
13 words
A pipe in accordance with claim 28 wherein said polymeric coating is polyethylene.
Claim 34
Dependent Claim
14 words
A pipe in accordance with claim 30 wherein said polymeric coating is cross-linked polyethylene.
Claim 35
Dependent Claim
16 words
A pipe in accordance with claim 28 wherein said adhesive component is a hot melt adhesive.
Claim 36
Dependent Claim
20 words
A pipe in accordance with claim 32 wherein said hot melt adhesive is an ethylene-ethyl acrylate copolymer hot melt adhesive.
Claim 37
Dependent Claim
20 words
A pipe in accordance with claim 32 wherein said hot melt adhesive comprises an ethylene-vinyl acetate copolymer hot melt adhesive.
Claim 38
Dependent Claim
13 words
A pipe in accordance with claim 28 wherein said polyhydroxy compound is glucose.
Claim 39
Dependent Claim
13 words
A pipe in accordance with claim 28 wherein said polyhydroxy compound is sorbitol.
Claim 40
Dependent Claim
13 words
A pipe in accordance with claim 28 wherein said polyhydroxy compound is mannitol.
Claim 41
Dependent Claim
14 words
A pipe in accordance with claim 28 wherein said polyhydroxy compound is polyvinyl alcohol.
Claim 42
Dependent Claim
13 words
A pipe in accordance with claim 28 wherein said polyhydroxy compound is pentaerythritol.
Claim 43
Dependent Claim
51 words
An adhesive composition comprising an ethylene-ethyl acrylate copolymer hot melt adhesive and from about 0.01 to about 30 percent by weight, based on the total weight of the adhesive composition, of an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least 50 percent of the aliphatic carbon atoms.
Claim 44
Dependent Claim
51 words
An adhesive composition comprising an ethylene-ethyl acrylate copolymer hot melt adhesive and from about 0.01 to about 30 percent by weight, based on the total weight of the adhesive composition, of an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least 50 percent of the aliphatic carbon atoms.
Claim 45
Dependent Claim
14 words
An adhesive composition in accordance with claim 40 wherein said polyhydroxy compound is glucose.
Claim 46
Dependent Claim
14 words
An adhesive composition in accordance with claim 40 wherein said polyhydroxy compound is sorbitol.
Claim 47
Dependent Claim
14 words
An adhesive composition in accordance with claim 40 wherein said polyhydroxy compound is mannitol.
Claim 48
Dependent Claim
15 words
An adhesive composition in accordance with claim 40 wherein said polyhydroxy compound is polyvinyl alcohol.
Claim 49
Dependent Claim
14 words
An adhesive composition in accordance with claim 40 wherein said polyhydroxy compound is pentaerythritol.
Claim 50
Dependent Claim
51 words
An adhesive composition comprising an ethylene-vinyl acetate copolymer hot melt adhesive and from about 0.01 to about 30 percent by weight, based on the total weight of the adhesive composition, of an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least 50 percent of the aliphatic carbon atoms.
Claim 51
Dependent Claim
51 words
An adhesive composition comprising an ethylene-vinyl acetate copolymer hot melt adhesive and from about 0.01 to about 30 percent by weight, based on the total weight of the adhesive composition, of an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least 50 percent of the aliphatic carbon atoms.
Claim 52
Dependent Claim
14 words
An adhesive composition in accordance with claim 46 wherein said polyhydroxy compound is glucose.
Claim 53
Dependent Claim
14 words
An adhesive composition in accordance with claim 46 wherein said polyhydroxy compound is sorbitol.
Claim 54
Dependent Claim
14 words
An adhesive composition in accordance with claim 46 wherein said polyhydroxy compound is mannitol.
Claim 55
Dependent Claim
15 words
An adhesive composition in accordance with claim 50 wherein said polyhydroxy compound is polyvinyl alcohol.
Claim 56
Dependent Claim
14 words
An adhesive composition in accordance with claim 46 wherein said polyhydroxy compound is pentaerythritol.
Claim 57
Independent Claim
62 words
A method of improving the resistance to cathodic disbondment of an adhesive which comprises incorporating into a hot melt adhesive or a mastic from about 0.01 to about 30 percent by weight, based on the total weight of the adhesive composition, of an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least 50 percent of the aliphatic carbon atoms.
Claim 58
Independent Claim
62 words
A method of improving the resistance to cathodic disbondment of an adhesive which comprises incorporating into a hot melt adhesive or a mastic from about 0.01 to about 30 percent by weight, based on the total weight of the adhesive composition, of an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least 50 percent of the aliphatic carbon atoms.
Claim 59
Dependent Claim
15 words
A method in accordance with claim 32 wherein said adhesive is a hot melt adhesive.
Claim 60
Dependent Claim
20 words
A method in accordance with claim 53 wherein said hot melt adhesive is an ethylene-ethyl acrylate copolymer hot melt adhesive.
Claim 61
Dependent Claim
20 words
A method in accordance with claim 53 wherein said hot melt adhesive is an ethylene-vinyl acetate copolymer hot melt adhesive.
Claim 62
Dependent Claim
13 words
A method in accordance with claim 52 wherein said polyhydroxy compound is glucose.
Claim 63
Dependent Claim
13 words
A method in accordance with claim 52 wherein said polyhydroxy compound is sorbitol.
Claim 64
Dependent Claim
13 words
A method in accordance with claim 52 wherein said polyhydroxy compound is mannitol.
Claim 65
Dependent Claim
14 words
A method in accordance with claim 52 wherein said polyhydroxy compound is polyvinyl alcohol.
Claim 66
Dependent Claim
13 words
A method in accordance with claim 52 wherein said polyhydroxy compound is pentaerythritol.
Claim 67
Independent Claim
98 words
A method of protecting a metal substrate from corrosion which comprises impressing an electrical current through said substrate such that said substrate forms a cathode, and bonding to the surface of said substrate a protective coating by means of an adhesive composition comprising an adhesive component and from about 0.01 to about 30 percent by weight, based on the total weight of the adhesive composition, of an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least about 50 percent of the aliphatic carbon atoms, said adhesive component being a hot melt adhesive or a mastic.
Claim 68
Independent Claim
98 words
A method of protecting a metal substrate from corrosion which comprises impressing an electrical current through said substrate such that said substrate forms a cathode, and bonding to the surface of said substrate a protective coating by means of an adhesive composition comprising an adhesive component and from about 0.01 to about 30 percent by weight, based on the total weight of the adhesive composition, of an aliphatic polyhydroxy compound in which hydroxyl groups are bonded to at least about 50 percent of the aliphatic carbon atoms, said adhesive component being a hot melt adhesive or a mastic.
Claim 69
Dependent Claim
15 words
A method in accordance with claim 61 wherein said protective coating is a polymeric material.
Claim 70
Dependent Claim
13 words
A method in accordance with claim 62 wherein said polymeric material is polyethylene.
Claim 71
Dependent Claim
14 words
A method in accordance with claim 62 wherein said polymeric material is cross-linked polyethylene.
Claim 72
Dependent Claim
15 words
A method in accordance with claim 61 wherein said adhesive is a hot melt adhesive.
Claim 73
Dependent Claim
20 words
A method in accordance with claim 61 wherein said hot melt adhesive is an ethylene-ethyl acrylate copolymer hot melt adhesive.
Claim 74
Dependent Claim
20 words
A method in accordance with claim 61 wherein said hot melt adhesive is an ethylene-vinyl acetate copolymer hot melt adhesive.
Claim 75
Dependent Claim
13 words
A method in accordance with claim 61 wherein said polyhydroxy compound is glucose.
Claim 76
Dependent Claim
13 words
A method in accordance with claim 61 wherein said polyhydroxy compound is sorbitol.
Claim 77
Dependent Claim
13 words
A method in accordance with claim 61 wherein said polyhydroxy compound is mannitol.
Claim 78
Dependent Claim
14 words
A method in accordance with claim 61 wherein said polyhydroxy compound is polyvinyl alcohol.
Claim 79
Dependent Claim
13 words
A method in accordance with claim 61 wherein said polyhydroxy compound is pentaerythritol.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |