US4133352A
Expired / Lapsed
US
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Pipe coating compositions
Assignee: Lion Oil Co
•
Filing: 1977-10-21
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Granted: 1979-01-09
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Expires: 1997-10-21
Abstract
Abstract A composition especially useful as a primer coating having improved hot line adhesion and cathodic disbonding resistance comprises a solution of chlorinated rubber and aromatic petroleum pitch in a solvent.
Inventors
- 👤 Russell E. Koons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:17
CPC Classifications
C; C09; C09D; C09D115/00; C09D115/02; C09D195/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1386; Y10T428/31504; Y10T428/31678; Y10T428/31717; Y10T428/31815
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
111 words
An article coated with a primer composition and an asphaltic coating, said primer composition being present in an amount sufficient to impart resistance to cathodic disbonding of said asphaltic coating from said article, said primer composition comprising chlorinated rubber, a 20% solution of the chlorinated rubber in toluene having a viscosity of from about 20 to about 300 centipoises at 25° C., and an aromatic petroleum pitch having a softening point of from about 104° F. to about 152° F. and a specific gravity at 60° F. of about 1.17, the weight ratio of chlorinated rubber to aromatic petroleum pitch being from about 0.8 to 1 to about 2 to 1.
Claim 2
Dependent Claim
111 words
An article coated with a primer composition and an asphaltic coating, said primer composition being present in an amount sufficient to impart resistance to cathodic disbonding of said asphaltic coating from said article, said primer composition comprising chlorinated rubber, a 20% solution of the chlorinated rubber in toluene having a viscosity of from about 20 to about 300 centipoises at 25° C., and an aromatic petroleum pitch having a softening point of from about 104° F. to about 152° F. and a specific gravity at 60° F. of about 1.17, the weight ratio of chlorinated rubber to aromatic petroleum pitch being from about 0.8 to 1 to about 2 to 1.
Claim 3
Dependent Claim
10 words
The article of claim 1 wherein the article is metallic.
Claim 4
Dependent Claim
11 words
The article of claim 2 wherein the metallic article is pipe.
Claim 5
Dependent Claim
11 words
The metallic pipe of claim 3 wherein the pipe is steel.
Claim 6
Dependent Claim
17 words
The article of claim 3 wherein the coated metallic pipe has at least one asphalt-based coating thereover.
Claim 7
Dependent Claim
20 words
The article of claim 1 wherein the weight ratio of the chlorinated rubber to aromatic petroleum pitch is about 1:1.
Claim 8
Dependent Claim
139 words
A primer composition for imparting resistance to cathodic disbonding of an asphaltic coating from an article coated therewith, said primer composition consisting essentially of at least one chlorinated rubber, a 20% solution of said chlorinated rubber in toluene having a viscosity of from about 20 to about 300 centipoises at 25° C, and at least one aromatic petroleum pitch, the components of the aromatic petroleum pitch being substantially aromatic and being obtained by heat cracking at at least 700° C a member selected from the group consisting of crude petroleum oil, heavy oil, naphtha, asphalt, and mixtures thereof, and distilling off the cracked fractions of 400° C and less, said chlorinated rubber and aromatic petroleum pitch being dissolved in at least one solvent therefor, the weight ratio of chlorinated rubber to aromatic petroleum pitch being at least about 0.8:1.
Claim 9
Dependent Claim
139 words
A primer composition for imparting resistance to cathodic disbonding of an asphaltic coating from an article coated therewith, said primer composition consisting essentially of at least one chlorinated rubber, a 20% solution of said chlorinated rubber in toluene having a viscosity of from about 20 to about 300 centipoises at 25° C, and at least one aromatic petroleum pitch, the components of the aromatic petroleum pitch being substantially aromatic and being obtained by heat cracking at at least 700° C a member selected from the group consisting of crude petroleum oil, heavy oil, naphtha, asphalt, and mixtures thereof, and distilling off the cracked fractions of 400° C and less, said chlorinated rubber and aromatic petroleum pitch being dissolved in at least one solvent therefor, the weight ratio of chlorinated rubber to aromatic petroleum pitch being at least about 0.8:1.
Claim 10
Dependent Claim
32 words
The composition of claim 7 wherein at least one solvent is aromatic, and the aromatic petroleum pitch has a softening point in the range of about 100° F. to about 150° F.
Claim 11
Dependent Claim
135 words
A primer for imparting resistance to cathodic disbonding of an asphaltic coating from a substrate coated therewith, said primer comprising a solution of (a) from about 8% to about 20% by weight of a chlorinated rubber, a 20% solution of the chlorinated rubber in toluene having a viscosity of from about 20 to about 300 centipoises at 25° C.; (b) from about 4% to about 25% by weight of an aromatic petroleum pitch having a softening point of from about 104° F. to about 152° F. and a specific gravity at 60° F. of about 1.17; and (c) from about 55% to about 88% by weight of an aromatic solvent for the chlorinated rubber and the aromatic petroleum pitch; the weight ratio of component (a) to component (b) being from about 0.8:1 to about 2:1.
Claim 12
Dependent Claim
135 words
A primer for imparting resistance to cathodic disbonding of an asphaltic coating from a substrate coated therewith, said primer comprising a solution of (a) from about 8% to about 20% by weight of a chlorinated rubber, a 20% solution of the chlorinated rubber in toluene having a viscosity of from about 20 to about 300 centipoises at 25° C.; (b) from about 4% to about 25% by weight of an aromatic petroleum pitch having a softening point of from about 104° F. to about 152° F. and a specific gravity at 60° F. of about 1.17; and (c) from about 55% to about 88% by weight of an aromatic solvent for the chlorinated rubber and the aromatic petroleum pitch; the weight ratio of component (a) to component (b) being from about 0.8:1 to about 2:1.
Claim 13
Dependent Claim
20 words
The primer as defined by claim 9 wherein the weight ratio of component (a) to component (b) is about 1:1.
Claim 14
Dependent Claim
13 words
The primer as defined by claim 9 wherein the aromatic solvent is xylene.
Claim 15
Dependent Claim
29 words
The primer as defined by claim 9 wherein the aromatic solvent is an aromatic naptha solvent having a boiling range of from about 311° F. to about 344° F.
Claim 16
Dependent Claim
27 words
The primer as defined by claim 9 which further comprises (d) from about 0.3% to about 0.8% by weight of a storage stabilizer for the chlorinated rubber.
Claim 17
Dependent Claim
12 words
The primer as defined by claim 13 wherein the stabilizer is epichlorohydrin.
Claim 18
Dependent Claim
104 words
A primer for imparting resistance to cathodic disbonding of an asphaltic pipe coating from a pipe coated therewith, said primer comprising a solution of (a) about 13% by weight of a chlorinated rubber, a 20% solution of the chlorinated rubber in toluene having a viscosity of about 300 centipoises at 25° C.; (b) about 13% by weight of an aromatic petroleum pitch having a softening point of from about 115° F. to about 135° F. and a specific gravity at 60° F. of about 1.17; and (c) about 74% by weight of an aromatic solvent for the chlorinated rubber and the aromatic petroleum pitch.
Claim 19
Dependent Claim
104 words
A primer for imparting resistance to cathodic disbonding of an asphaltic pipe coating from a pipe coated therewith, said primer comprising a solution of (a) about 13% by weight of a chlorinated rubber, a 20% solution of the chlorinated rubber in toluene having a viscosity of about 300 centipoises at 25° C.; (b) about 13% by weight of an aromatic petroleum pitch having a softening point of from about 115° F. to about 135° F. and a specific gravity at 60° F. of about 1.17; and (c) about 74% by weight of an aromatic solvent for the chlorinated rubber and the aromatic petroleum pitch.
Claim 20
Dependent Claim
13 words
The primer as defined by claim 15 wherein the aromatic solvent is xylene.
Claim 21
Dependent Claim
29 words
The primer as defined by claim 15 wherein the aromatic solvent is an aromatic naphtha solvent having a boiling range of from about 311° F. to about 344° F.
Claim 22
Dependent Claim
23 words
The primer as defined by claim 15 which further comprises (d) about 0.5% by weight of a storage stabilizer for the chlorinated rubber.
Claim 23
Dependent Claim
12 words
The primer as defined by claim 18 wherein the stabilizer is epichlorohydrin.
Claim 24
Independent Claim
153 words
A method for imparting resistance to cathodic disbonding of an asphalt coating from a substrate coated therewith which comprises coating said substrate, prior to coating said substrate with said asphaltic coating, with a primer composition consisting essentially of at least one chlorinated rubber, a 20% solution of said chlorinated rubber in toluene having a viscosity of from about 20 to about 300 centipoises at 25° C, and at least one aromatic petroleum pitch, the components of the aromatic petroleum pitch being substantially aromatic and being obtained by heat cracking at at least 700° C a member selected from the group consisting of crude petroleum oil, heavy oil, naphtha, asphalt, and mixtures thereof, and distilling off the cracked fractions of 400° C and less, said chlorinated rubber and aromatic petroleum pitch being dissolved in at last one solvent therefor, the weight ratio of chlorinated rubber to aromatic petroleum pitch being at least about 0.8:1.
Claim 25
Independent Claim
153 words
A method for imparting resistance to cathodic disbonding of an asphalt coating from a substrate coated therewith which comprises coating said substrate, prior to coating said substrate with said asphaltic coating, with a primer composition consisting essentially of at least one chlorinated rubber, a 20% solution of said chlorinated rubber in toluene having a viscosity of from about 20 to about 300 centipoises at 25° C, and at least one aromatic petroleum pitch, the components of the aromatic petroleum pitch being substantially aromatic and being obtained by heat cracking at at least 700° C a member selected from the group consisting of crude petroleum oil, heavy oil, naphtha, asphalt, and mixtures thereof, and distilling off the cracked fractions of 400° C and less, said chlorinated rubber and aromatic petroleum pitch being dissolved in at last one solvent therefor, the weight ratio of chlorinated rubber to aromatic petroleum pitch being at least about 0.8:1.
Claim 26
Dependent Claim
26 words
The method according to claim 20 wherein the aromatic petroleum pitch has a softening point in the range of about 100° F to about 150° F.
Claim 27
Dependent Claim
19 words
The method according to claim 20 wherein the solvent for the aromatic petroleum pitch and chlorinated rubber is aromatic.
Claim 28
Dependent Claim
12 words
The method according to claim 22 wherein the aromatic solvent is xylene.
Claim 29
Dependent Claim
27 words
The method according to claim 22 wherein the aromatic solvent is an aromatic naphtha solvent having a boiling range of from 311° F to about 344° F.
Claim 30
Dependent Claim
11 words
The method according to claim 20 wherein the substrate is metallic.
Claim 31
Dependent Claim
13 words
The method according to claim 25 wherein the metallic substrate is a pipe.
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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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |