US4396658A
Expired / Lapsed
US
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Polymer alloy coating for metal substrate
Assignee: YUBOSCOPE Inc
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Filing: 1982-03-05
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Granted: 1983-08-02
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Expires: 2002-03-05
Abstract
Abstract A novel polymer alloy coating is provided consisting essentially of polyphenylene sulfide and an amount of polyimide. The polyimide is produced by the crosslinking and curing of an acetylene terminated aromatic polyimide oligomer resin. The amount of polyimide utilized is sufficient to enhance the adhesiveness of the polyphenylene sulfide to a metal substrate without substantially changing the melt flow properties, chemical resistance and thermal stability of the polyphenylene sulfide. A polymer alloy resin composition is also provided for application to the metal substrate to produce the polymer alloy coating. The novel polymer alloy coating is particularly suitable for coating pipes, particularly pipe couplings for oil and gas well production pipes which are exposed to extreme temperatures, pressures and corrosive environments.
Inventors
- 👤 Hal J. Mettes
- 👤 Barnard P. E. Goodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:18
CPC Classifications
C; C09; C09D; C09D181/00; C09D181/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
61 words
A polymer alloy coating consisting essentially of polyphenylene sulfide and an amount of polyimide sufficient to enhance the adhesiveness of the polyphenylene sulfide to a metal substrate without substantially changing the melt flow properties, chemical resistance and thermal stability of the polyphenylene sulfide, wherein the polyimide is produced by the crosslinking and curing of an acetylene terminated aromatic polyimide oligomer resin.
Claim 2
Dependent Claim
61 words
A polymer alloy coating consisting essentially of polyphenylene sulfide and an amount of polyimide sufficient to enhance the adhesiveness of the polyphenylene sulfide to a metal substrate without substantially changing the melt flow properties, chemical resistance and thermal stability of the polyphenylene sulfide, wherein the polyimide is produced by the crosslinking and curing of an acetylene terminated aromatic polyimide oligomer resin.
Claim 3
Dependent Claim
72 words
A polymer alloy coating consisting essentially of a polyphenylene sulfide and an amount of a polyimide sufficient to enhance the adhesivness of the polyphenylene sulfide to a metal substrate without substantially changing the melt flow properties, chemical resistance and thermal stability of the polyphenylene sulfide, wherein the polyimide is produced by the crosslinking and curing of a polyimide oligomer of the formula: ##STR5## wherein n is from about 1 to about 2.
Claim 4
Dependent Claim
72 words
A polymer alloy coating consisting essentially of a polyphenylene sulfide and an amount of a polyimide sufficient to enhance the adhesivness of the polyphenylene sulfide to a metal substrate without substantially changing the melt flow properties, chemical resistance and thermal stability of the polyphenylene sulfide, wherein the polyimide is produced by the crosslinking and curing of a polyimide oligomer of the formula: ##STR5## wherein n is from about 1 to about 2.
Claim 5
Dependent Claim
38 words
The alloy of claim 1 or 2, wherein the polyphenylene sulfide has the general formula: ##STR6## wherein m is a positive integer selected to result in a polyphenylene sulfide polymer which is thermally stable above about 200° C.
Claim 6
Dependent Claim
22 words
The alloy coating of claim 3, wherein the amount of polyimide is less than about 15% by weight of the alloy coating.
Claim 7
Dependent Claim
59 words
A polymer alloy resin composition consisting essentially of a polyphenylene sulfide resin and an acetylene terminated aromatic polyimide oligomer resin, the amount of polyimide resin, when crosslinked and cured, being sufficient to enhance the adhesiveness of the polyphenylene sulfide to a metal substrate without substantially changing the melt flow properties chemical resistance and thermal stability of the polyphenylene sulfide.
Claim 8
Dependent Claim
59 words
A polymer alloy resin composition consisting essentially of a polyphenylene sulfide resin and an acetylene terminated aromatic polyimide oligomer resin, the amount of polyimide resin, when crosslinked and cured, being sufficient to enhance the adhesiveness of the polyphenylene sulfide to a metal substrate without substantially changing the melt flow properties chemical resistance and thermal stability of the polyphenylene sulfide.
Claim 9
Dependent Claim
75 words
A polymer alloy resin composition consisting essentially of a polyphenylene sulfide resin and a polyimide oligomer resin, the amount of polyimide resin, when crosslinked and cured, being sufficient to enhance the adhesivness of the polyphenylene sulfide to a metal substrate without substantially changing the melt flow properties, chemical resistance and thermal stability of the polyphenylene sulfide, wherein the polyimide oligomer resin is of the formula: ##STR7## wherein n is from about 1 to about 2.
Claim 10
Dependent Claim
75 words
A polymer alloy resin composition consisting essentially of a polyphenylene sulfide resin and a polyimide oligomer resin, the amount of polyimide resin, when crosslinked and cured, being sufficient to enhance the adhesivness of the polyphenylene sulfide to a metal substrate without substantially changing the melt flow properties, chemical resistance and thermal stability of the polyphenylene sulfide, wherein the polyimide oligomer resin is of the formula: ##STR7## wherein n is from about 1 to about 2.
Claim 11
Dependent Claim
39 words
The resin composition of claim 5 or 6, wherein the polyphenylene sulfide has the general formula: ##STR8## wherein m is a positive integer selected to result in a polyphenylene sulfide polymer which is thermally stable above about 200° C.
Claim 12
Dependent Claim
26 words
The resin composition of claim 5 or 6, wherein the amount of polyimide oligomer resin is less than about 15% by weight of the resin composition.
Claim 13
Dependent Claim
22 words
The resin composition of claim 5 or 6, wherein the resin composition is a powder which passes through a 60 Tyler mesh.
Claim 14
Dependent Claim
19 words
A process for coating a metal substrate comprising applying to the substrate the polymer alloy composition of claim 1.
Claim 15
Dependent Claim
68 words
A process for coating a metal substrate comprising: (a) heating the substrate to a predetermined temperature; (b) contacting the substrate with a sufficient amount of the polymer alloy resin composition of claim 5 or 6 to coat the substrate; and (c) curing the coated substrate at a curing temperature for the resin composition, wherein the predetermined temperature is at least the melt flow temperature of the resin composition.
Claim 16
Dependent Claim
38 words
The process of claim 10 or 11, wherein the polyphenylene sulfide has the general formula: ##STR9## wherein m is a positive integer selected to result in a polyphenylene sulfide polymer which is thermally stable above about 200° C.
Claim 17
Dependent Claim
21 words
The process of claim 11, wherein the predetermined temperature and curing temperature are from about 280° C. to about 345° C.
Claim 18
Dependent Claim
23 words
The process of claim 11, wherein the amount of polyimide oligomer resin is less than about 15% by weight of the resin composition.
Claim 19
Dependent Claim
15 words
The process of claim 10 or 11, wherein the metal substrate is a pipe coupling.
Claim 20
Dependent Claim
22 words
The process of claim 10 or 11, wherein the metal substrate is a pipe coupling for oil and gas well production pipe.
Claim 21
Dependent Claim
14 words
A metal substrate coated with the polymer alloy coating of claim 1 or 2.
Claim 22
Dependent Claim
15 words
A metal pipe coupling coated with the polymer alloy coating of claim 1 or 2.
Claim 23
Dependent Claim
22 words
A metal pipe coupling for oil and gas well production pipe coated with the polymer alloy coating of claim 1 or 2.
Claim 24
Independent Claim
51 words
A method of enhancing the adhesiveness of a polyphenylene sulfide resin to a metal substrate without substantially changing the melt flow properties, chemical resistance and thermal stability of the polyphenylene sulfide comprising adding to the resin an effective amount to achieve such enhancement of an acetylene terminated aromatic polyimide oligomer resin.
Claim 25
Independent Claim
51 words
A method of enhancing the adhesiveness of a polyphenylene sulfide resin to a metal substrate without substantially changing the melt flow properties, chemical resistance and thermal stability of the polyphenylene sulfide comprising adding to the resin an effective amount to achieve such enhancement of an acetylene terminated aromatic polyimide oligomer resin.
Claim 26
Independent Claim
61 words
A method of enhancing the adhesiveness of a polyphenylene sulfide resin to a metal substrate without substantially changing the melt flow properties, chemical resistance and thermal stability of the polyphenylene sulfide comprising adding to the resin an effective amount to achieve such enhancement, of a polyimide oligomer resin having the formula: ##STR10## wherein n is from about 1 to about 2.
Claim 27
Independent Claim
61 words
A method of enhancing the adhesiveness of a polyphenylene sulfide resin to a metal substrate without substantially changing the melt flow properties, chemical resistance and thermal stability of the polyphenylene sulfide comprising adding to the resin an effective amount to achieve such enhancement, of a polyimide oligomer resin having the formula: ##STR10## wherein n is from about 1 to about 2.
Claim 28
Dependent Claim
39 words
The method of claim 20 or 21, wherein the polyphenylene sulfide resin has the general formula: ##STR11## wherein m is a positive integer selected to result in a polyphenylene sulfide polymer which is thermally stable above about 200° C.
Claim 29
Dependent Claim
26 words
The method of claim 20 or 21, wherein the amount of polyimide oligomer resin is less than about 15% by weight of the total resin composition.
Claim 30
Dependent Claim
49 words
A process for coating a metal substrate comprising: (a) applying to the substrate a coating of a polyimide produced by the crosslinking and curing of an acetylene terminated aromatic polyimide oligomer to produce a polyimide primed substrate; and (b) applying to the primed substrate a coating of polyphenylene sulfide.
Claim 31
Dependent Claim
49 words
A process for coating a metal substrate comprising: (a) applying to the substrate a coating of a polyimide produced by the crosslinking and curing of an acetylene terminated aromatic polyimide oligomer to produce a polyimide primed substrate; and (b) applying to the primed substrate a coating of polyphenylene sulfide.
Claim 32
Dependent Claim
36 words
The process of claim 24, wherein the polyphenylene sulfide has the general formula: ##STR12## wherein m is a positive integer selected to result in a polyphenylene sulfide polymer which is thermally stable above about 200° C.
Claim 33
Dependent Claim
24 words
The process of claim 24, wherein the polyimide oligomer resin is of the formula: ##STR13## wherein n is from about 1 to about 2.
Claim 34
Dependent Claim
16 words
The process of claim 24, 25 or 26, wherein the metal substrate is a pipe coupling.
Claim 35
Dependent Claim
22 words
The process of claim 24, 25 or 26, wherein the substrate is a pipe coupling for oil and gas well production pipe.
References Cited (Backward Citations)
US3179634A
Cited
US3179633A
Cited
US3354129A
Cited
US3454445A
Cited
US3562223A
Cited
US3505277A
Cited
US3582458A
Cited
US3712932A
Cited
US3658938A
Cited
US3744530A
Cited
US3708458A
Cited
US3801379A
Cited
US3819407A
Cited
US3845018A
Cited
US3879349A
Cited
US3864309A
Cited
US4064303A
Cited
US4054704A
Cited
US4054705A
Cited
US4017555A
Cited
US4139576A
Cited
US4156049A
Cited
US4307220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |