US4732632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protecting elongated substrate with multiple-layer polymer covering
Assignee: Tyco International Ltd
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Filing: 1985-10-18
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Granted: 1988-03-22
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Expires: 2005-10-18
Abstract
Abstract The invention relates to a method for applying a protective coating to a substrate, such as metallic pipe, which comprises applying onto the substrate a liquid curable polymeric composition capable of curing to a substantial extent within about 24 hours at less than about 80 DEG C., then applying one or more polymeric layers, the innermost of which is capable of interacting with said curable composition, and permitting the composition to cure. In certain embodiments the polymeric layer is applied as a polymeric article, in other embodiments a multiple layer polymeric covering is applied over the curable composition.
Inventors
- 👤 George Pieslak
- 👤 Tony G. Alvernaz
- 👤 Robin John
- 👤 James A. Rinde
- 👤 Eric Van Zele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:53
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/36; B05D7/00; B05D7/14; B05D7/146; B05D7/50; B05D7/56; B05D7/58; B05D7/582; F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1054; B05D2202/00; B05D2254/00; B05D2254/02; B05D2301/00; B05D2301/50; B05D2504/00; B05D2505/00; B05D3/00; B05D3/02; B05D3/0218
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
155 words
A method of applying a protective covering to an elongated substrate which comprises: (a) applying to the substrate at a temperature of not more than about 80° C., a curable polymeric composition which is a liquid at about 20° C., is curable to a substantial extent within about 24 hours at a temperature of not more than about 80° C., and comprises (i) a resin component; (ii) a curing agent; (b) applying a multiple-layer polymeric covering, having an innermost layer and an outermost layer, the innermost layer comprising uncured polymeric heat activatable sealant capable of interacting with said curable composition, over the curable polymeric composition in a manner such that said innermost layer is in intimate contact with said composition; and (c) allowing the curable composition to cure while maintaining intimate contact between said innermost layer and said composition at a temperature at which the outermost layer of the covering does not melt or flow.
Claim 2
Independent Claim
155 words
A method of applying a protective covering to an elongated substrate which comprises: (a) applying to the substrate at a temperature of not more than about 80° C., a curable polymeric composition which is a liquid at about 20° C., is curable to a substantial extent within about 24 hours at a temperature of not more than about 80° C., and comprises (i) a resin component; (ii) a curing agent; (b) applying a multiple-layer polymeric covering, having an innermost layer and an outermost layer, the innermost layer comprising uncured polymeric heat activatable sealant capable of interacting with said curable composition, over the curable polymeric composition in a manner such that said innermost layer is in intimate contact with said composition; and (c) allowing the curable composition to cure while maintaining intimate contact between said innermost layer and said composition at a temperature at which the outermost layer of the covering does not melt or flow.
Claim 3
Dependent Claim
15 words
A method in accordance with claim 1, wherein said curing agent comprises a Bronsted base.
Claim 4
Dependent Claim
31 words
A method in accordance with claim 2, wherein said Bronsted base is present in an amount of 0.01 to about 2 moles in excess of that required to cure the composition.
Claim 5
Dependent Claim
14 words
A method in accordance with claim 3, wherein said Bronsted base is an amine.
Claim 6
Dependent Claim
24 words
A method in accordance with claim 1, wherein said curable polymeric composition comprises a Bisphenol A epoxy resin, a polyamide and a tertiary amine.
Claim 7
Dependent Claim
31 words
A method in accordance with claim 1, wherein said curable polymeric composition further comprises about 0.1 to about 10% by weight, based on the weight of the composition, of a silane.
Claim 8
Dependent Claim
28 words
A method in accordance with claim 1, wherein the curable composition contains less than about 5% by weight, based on the weight of the composition, of a solvent.
Claim 9
Dependent Claim
32 words
A method in accordance with claim 1, which further comprises the step of heating the substrate to a temperature of not more than about 80° C. prior to applying said curable composition.
Claim 10
Dependent Claim
23 words
A method in accordance with claim 1, wherein said curable composition is cured at a temperature of not more than about 80° C.
Claim 11
Dependent Claim
78 words
A method in accordance with claim 1, wherein step (b) comprises positioning a heat recoverable polymeric article around the substrate and applying heat to cause the article to recover into intimate contact with said curable composition, said heat recoverable article being coated on one surface thereof with a heat activatable sealant and said article being positioned around the substrate such that the heat activatable sealant is the innermost layer which comes into intimate contact with said curable composition.
Claim 12
Dependent Claim
22 words
A method in accordance with claim 10, wherein the heat activatable sealant comprises a polyamide or ethylene terpolymer based hot melt adhesive.
References Cited (Backward Citations)
US30006A
Cited
US3231443A
Cited
US3402742A
Cited
US3420277A
Cited
US3502492A
Cited
US3525656A
Cited
US3616006A
Cited
US3625259A
Cited
US3700520A
Cited
US3759751A
Cited
US3823045A
Cited
US3787452A
Cited
US3867322A
Cited
US3802908A
Cited
USRE30006E
Cited
US4142555A
Cited
US4079168A
Cited
US4192697A
Cited
GB1542333A
Cited
US4211595A
Cited
US4213486A
Cited
US4243718A
Cited
JPS55123626A
Cited
US4287034A
Cited
GB2076693A
Cited
US4345004A
Cited
US4507340A
Cited
US4331715A
Cited
EP0065838A1
Cited
US4455204A
Cited
US4427725A
Cited
US4421569A
Cited
US4510007A
Cited
US4521470A
Cited
US4481239A
Cited
JPS5952783A
Cited
US4477517A
Cited
US4510181A
Cited
US4574023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |