# US 7,608,343 B2 · Composition for the protection of a shaped article against corrosion

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- Number: US 7,608,343 B2
- Document ID: US7608343B2
- Status: Granted
- Kind: B2
- Application number: 10/564,516
- Filed: 2004-07-14
- Published: 2006-08-10
- Granted: 2009-10-27
- Earliest claimed: 2003-07-14
- Assignees: Frans Nooren Afdichtingssystetmen B.V.
- Inventors: Frans Nooren
- Web page: https://patentgrep.com/patent/US7608343B2

## CPC

- B32B 27/08: of synthetic resin
- B32B 27/20: using fillers, pigments, thixotroping agents
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- C08K 5/005: {Stabilisers against oxidation, heat, light, ozone}
- B32B 2307/714: Inert, i.e. inert to chemical degradation, corrosion
- B32B 2323/00: Polyalkenes
- B32B 2323/04: Polyethylene
- B32B 2327/00: Polyvinylhalogenides
- B32B 2331/04: Polymers of vinyl acetate, e.g. PVA
- B32B 2571/00: Protective equipment
- Y10T 428/269: including synthetic resin or polymer layer or component
- Y10T 428/31855: Of addition polymer from unsaturated monomers
- Y10T 428/31909: Next to second addition polymer from unsaturated monomers
- Y10T 428/31913: Monoolefin polymer
- Y10T 428/31917: Next to polyene polymer
- Y10T 428/31946: Next to second aldehyde or ketone condensation product
- Y10T 442/10: Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
- Y10T 442/102: Woven scrim
- Y10T 442/162: Including a natural or synthetic rubber layer
- Y10T 442/169: Polyolefin film or sheet
- Y10T 442/183: Synthetic polymeric fiber
- Y10T 442/3886: Olefin polymer or copolymer sheet or film [e.g., polypropylene, polyethylene, ethylene-butylene copolymer, etc.]
- Y10T 442/40: Knit fabric [i.e., knit strand or strip material]
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The invention relates to a composition for the protection of a shaped article against corrosion, said composition (comprising (a) a polyisobutene having a glass transition temperature of less than −20° C. and surface tension of less than 40 mM/m at a temperature above the glass transition temperature of said polyisobutene, (b) a filler material and (c) an anti-oxidant composition. The anti-oxidant composition comprises a primary and/or a secondary anti-oxidant, the primary anti-oxidant being selected from the group consisting of sterically hindered phenol compounds. The invention further relates to a wrapping tape comprising said composition for the protection of a shaped article, a process for the manufacture of said wrapping tape and a process for covering a shaped article with said wrapping tape.

## Claims

### Claim 1

A shaped article having protection from corrosion comprising a shaped article having a surface and a wrapping tape covering at least a portion of the surface of the shaped article, wherein the wrapping tape comprises:
(a) a first layer comprising a film, said film comprising a polymer or a copolymer of one or more α-olefins and/or diolefins, and
(b) a second layer comprising a composition comprising:
(i) a polyisobutene having a glass transition temperature of less than −20° C. and surface tension of less than 40 mM/in at a temperature above the glass transition temperature of said polyisobutene,
(ii) a filler material, and
(iii) an anti-oxidant composition, wherein said anti-oxidant composition comprises a primary and a secondary anti-oxidant, the primary anti-oxidant being selected from the group consisting of sterically hindered phenol compounds, provided that the sterically hindered phenol compound is not 2,6-di-t-butyl-4-methylphenol.

### Claim 2 (depends on 1)

The shaped article according to claim 1 wherein the shaped article is an oil line, gas line, or pipe.

### Claim 3

A method for the protection of a shaped article against corrosion comprising:
(A)providing a shaped article having a surface; and
(B)covering at least a portion of the surface of the shaped article with a first layer of wrapping tape, wherein the wrapping tape comprises:
(i) a first layer comprising a film, said film comprising a polymer or a copolymer of one or more α-olefins and/or diolefins, and
(ii) a second layer a comprising a composition comprising:
(a) a polyisobutene having a glass transition temperature of less than −20° C. and surface tension of less than 40 mM/in at a temperature above the glass transition temperature of said polyisobutene,
(b) a filler material, and
(c) an anti-oxidant composition, wherein said anti-oxidant composition comprises a primary and a secondary anti-oxidant, the primary anti-oxidant being selected from the group consisting of sterically hindered phenol compounds, provided that the sterically hindered phenol compound is not 2,6-di-t-butyl-4-methylphenol.

### Claim 4 (depends on 3)

The method according to claim 3, further comprising cleaning the surface of the shaped article to a St-w level according to NEN-EN-ISO Standard 8501-1 prior to covering with the wrapping tape.

### Claim 5 (depends on 3)

The method according to claim 3 comprising overlapping the first layer of wrapping tape around the shaped article with another layer of the wrapping tape.

### Claim 6 (depends on 3)

The method according to claim 3, further comprising wrapping an outerwrap film around the shaped article.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the outerwrap film comprises one or more polyolefins.

### Claim 8 (depends on 7)

The method according to claim 7, wherein the polyolefin is selected from the group consisting of ethylene homopolymers, ethylene copolymers, ethylene vinylchloride copolymers, and ethylene vinylacetate copolymers.

### Claim 9 (depends on 1)

The shaped article according to claim 1, wherein the sterically hindered phenol compound comprises at least two sterically hindered phenol groups.

### Claim 10 (depends on 1)

The shaped article according to claim 1, wherein the secondary anti-oxidant is selected from the group consisting of phosphites and thioesters.

### Claim 11 (depends on 1)

The shaped article according to claim 1, wherein the anti-oxidant composition further comprises a lactone.