US4407893A
Expired / Lapsed
US
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Polyolefin coating containing an ionomer for metal substrates
Assignee: WALTER INDUSTRIES Inc
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Filing: 1981-12-03
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Granted: 1983-10-04
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Expires: 2001-12-03
Abstract
Abstract A method for coating a metal surface by depositing a mixture comprising a polyolefin and an ionomer on the metal surface, which is at a temperature sufficient to fuse the mixture to the metal surface, and thereafter cooling the resulting coated surface; and the coated article produced by the method. The method is especially useful in coating a ferrous metal surface, such as, for example, the interior surface of a pipe.
Inventors
- 👤 Andrew B. Malizio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:45
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/16; B05D3/00; B05D3/02; B05D3/0218; B05D7/22; B05D7/222; Y; Y10; Y10S; Y10S411/00; Y10S411/90; Y10S411/901; Y10S411/902; Y10S411/903; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
133 words
A method of coating a metal surface which comprises the steps of: (a) providing a mixture comprising a polyolefin and an ionomer, said polyolefin being a member selected from the group consisting of polyethylene, polypropylene, an ethylene-vinyl acetate copolymer, an ethylene-unsaturated carboxylic acid copolymer, and an ethylene-unsaturated carboxylic acid ester copolymer, (b) grinding or grit-blasting said metal surface to form an anchor pattern thereon, (c) depositing said mixture on said anchor pattern of said metal surface, said metal surface being at a temperature sufficient to (1) cause said mixture to flow into said anchor pattern and (2) fuse said mixture to said metal surface, whereby said mixture melts to form a coating on said metal surface, and (d) cooling the coated surface to effect the bonding of said coating to said metal surface.
Claim 2
Independent Claim
133 words
A method of coating a metal surface which comprises the steps of: (a) providing a mixture comprising a polyolefin and an ionomer, said polyolefin being a member selected from the group consisting of polyethylene, polypropylene, an ethylene-vinyl acetate copolymer, an ethylene-unsaturated carboxylic acid copolymer, and an ethylene-unsaturated carboxylic acid ester copolymer, (b) grinding or grit-blasting said metal surface to form an anchor pattern thereon, (c) depositing said mixture on said anchor pattern of said metal surface, said metal surface being at a temperature sufficient to (1) cause said mixture to flow into said anchor pattern and (2) fuse said mixture to said metal surface, whereby said mixture melts to form a coating on said metal surface, and (d) cooling the coated surface to effect the bonding of said coating to said metal surface.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein said metal surface is a member selected from the group consisting of aluminum, copper, iron and steel.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein said metal surface is a ferrous metal.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein said metal surface is a member selected from the group consisting of cast iron and ductile iron.
Claim 6
Dependent Claim
10 words
The method of claim 3 wherein said polyolefin is polyethylene.
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein said polyolefin is a blend of high density polyethylene and low density polyethylene.
Claim 8
Dependent Claim
28 words
The method of claim 6 wherein the weight ratio of said high density polyethylene to said low density polyethylene in said blend is from about 1:1 to 1:3.
Claim 9
Dependent Claim
12 words
The method of claim 5 wherein said mixture additionally includes a filler.
Claim 10
Dependent Claim
10 words
The method of claim 8 wherein said filler is sand.
Claim 11
Dependent Claim
18 words
The method of claim 5 wherein said ionomer has a melt index of from about 14 to 100.
Claim 12
Dependent Claim
112 words
The method of claim 1 which comprises the steps of: (a) providing a mixture comprising a powdery blend of high density polyethylene, low density polyethylene, and an ionomer, (b) grinding or grit-blasting a ferrous metal surface to form an anchor pattern thereon, (c) depositing said mixture on said anchor pattern of said ferrous metal surface, said metal surface being at a temperature sufficient to (1) cause said mixture to flow into said anchor pattern and (2) fuse said mixture to said metal surface, whereby said mixture melts to form a coating on said metal surface, and (d) cooling the coated surface to effect the bonding of said coating to said metal surface.
Claim 13
Dependent Claim
55 words
The method of claim 11 wherein: (a) the weight ratio of said high density polyethylene to said low density polyethylene in said blend is from about 1:1 to 1:3, and (b) said ionomer has a melt index of from about 14 to 100 and comprises about 4 to 60 percent by weight of said blend.
Claim 14
Independent Claim
14 words
The method of claims 11 or 12 wherein said mixture additionally includes a filler.
Claim 15
Dependent Claim
10 words
The method of claim 13 wherein said filler is sand.
Claim 16
Dependent Claim
35 words
The method of claim 12 wherein said mixture comprises about 20 to 48% by weight low density polyethylene, about 20 to 48% by weight high density polyethylene, and about 60 to 4% by weight ionomer.
Claim 17
Dependent Claim
25 words
The method of claim 15 wherein the weight ratio of said high density polyethylene to said low density polyethylene in said blend is about 1:1.
Claim 18
Dependent Claim
40 words
The method of claim 13 wherein said mixture comprises about 331/3% by weight filler, about 22 to 30% by weight low density polyethylene, about 22 to 30% by weight high density polyethylene, and about 22 to 7% by weight ionomer.
Claim 19
Dependent Claim
10 words
The method of claim 17 wherein said filler is sand.
Claim 20
Dependent Claim
25 words
The method of claim 18 wherein the weight ratio of said high density polyethylene to said low density polyethylene in said blend is about 1:1.
Claim 21
Dependent Claim
73 words
The method of claim 12 wherein the deposition of said mixture on said ferrous metal surface is accomplished by entraining said mixture in an air stream and directing the air stream and entrained mixture onto said ferrous metal surface, said surface being at 500° to 700° F., and the resulting coating is kept at a temperature of about 400° to 600° F. for a period of about 5 to 15 minutes before cooling.
Claim 22
Dependent Claim
12 words
The method of claim 20 wherein said mixture additionally includes a filler.
Claim 23
Dependent Claim
24 words
The method of claim 20 wherein said mixture is deposited on said ferrous metal surface in a thickness of about 15 to 65 mils.
Claim 24
Dependent Claim
18 words
The method of claim 11 wherein said ionomer has a melt index of from about 14 to 100.
Claim 25
Dependent Claim
64 words
A composite article comprising a ferrous metal substrate having an anchor pattern on a surface thereof, and a coating adhered to said anchor pattern, said coating comprising a mixture of a polyolefin and an ionomer, said polyolefin being a member selected from the group consisting of polyethylene, polypropylene, an ethylene-vinyl acetate copolymer, an ethylene-unsaturated carboxylic acid copolymer, and an ethylene-unsaturated carboxylic acid ester copolymer.
Claim 26
Dependent Claim
64 words
A composite article comprising a ferrous metal substrate having an anchor pattern on a surface thereof, and a coating adhered to said anchor pattern, said coating comprising a mixture of a polyolefin and an ionomer, said polyolefin being a member selected from the group consisting of polyethylene, polypropylene, an ethylene-vinyl acetate copolymer, an ethylene-unsaturated carboxylic acid copolymer, and an ethylene-unsaturated carboxylic acid ester copolymer.
Claim 27
Dependent Claim
23 words
The article of claim 24 wherein said metal substrate is a member selected from the group consisting of cast iron and ductile iron.
Claim 28
Dependent Claim
10 words
The article of claim 24 wherein said polyolefin is polyethylene.
Claim 29
Dependent Claim
12 words
The article of claim 26 wherein said mixture additionally includes a filler.
Claim 30
Dependent Claim
17 words
The article of claim 26 wherein said ionomer has a melt index of from 5 to 100.
Claim 31
Dependent Claim
18 words
The article of claim 26 wherein said ionomer has a melt index of from about 14 to 100.
Claim 32
Dependent Claim
19 words
The article of claim 24 wherein said polyolefin is a blend of high density polyethylene and low density polyethylene.
Claim 33
Dependent Claim
25 words
A coating mixture for application to a surface of a metal substrate comprising a blend of high density polyethylene, low density polyethylene and an ionomer.
Claim 34
Dependent Claim
25 words
A coating mixture for application to a surface of a metal substrate comprising a blend of high density polyethylene, low density polyethylene and an ionomer.
Claim 35
Dependent Claim
10 words
The mixture of claim 31 which additionally includes a filler.
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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) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |