US5087154A — Coatings and process affording corrosion protecti…

Claim 1

Independent Claim 56 words

A protective coating on a corrosion susceptible item adapted for use in a marine environment comprising at least two uninterrupted encapsulating and superposed layers of a marine resistant epoxy composition applied onto a select surface portion of the item and a thin layer of reinforcing composition extendign contiguously intervening between the superposed of said epoxy layers.

Claim 2

Dependent Claim 56 words

A protective coating on a corrosion susceptible item adapted for use in a marine environment comprising at least two uninterrupted encapsulating and superposed layers of a marine resistant epoxy composition applied onto a select surface portion of the item and a thin layer of reinforcing composition extendign contiguously intervening between the superposed of said epoxy layers.

Claim 3

Dependent Claim 43 words

A coating in accordance with claim 1 in which the said at least two superposed layes of expoxy comprise a plurality of such layers in a quantity greater than two and said reinforcing composition is disposed intervening between each of said superposed layers.

Claim 4

Dependent Claim 32 words

A coating in accordance with claim 1 in which said reinforcing composition comprises an epoxy permeable fibrous material in which the epoxy of at least one of said superposed layers has permeated.

Claim 5

Dependent Claim 16 words

A coating in accordance with claim 3 in which said reinforcing composition comprising a vitrified cloth.

Claim 6

Dependent Claim 36 words

A coating in accordance with claim 3 in which said reinforcing composition comprises a vitrified cloth of about 0.012 inches in thickness and having a breaking strength of at least 400 plus 380 pounds per inch.

Claim 7

Dependent Claim 25 words

A coating in accordance with claim 3 in which said reinforcing composition intervenes in a compressive wrap relation about the innermost of the superposed layers.

Claim 8

Dependent Claim 36 words

A coating in accordance with 1 in which said epoxy composition comprises a two-part mixture in substantially equal proportions of a polyamine converter and an epoxy resin operative to adhesively secure to said select surface portion.

Claim 9

Dependent Claim 36 words

A coating in accordance with 1 in which said epoxy composition comprises a two-part mixture in substantially equal proportions of a polyamine converter and an epoxy resin operative to adhesively secure to said select surface portion.

Claim 10

Dependent Claim 64 words

A coating in accordance with 7 in which said epoxy resin is comprised in percent by volume of Bisphenol-F epoxy resin (about 80-95%); fumed silica (about 5-10%); and coloring matter (about less than 5%); and said converter is comprised in percent by volume of polyamine compound (about 80-95%); alkyl substituted amino-phenol (about 5.15%); barium sulphate (about 5-10%); and organic acid (less than about 5%).

Claim 11

Dependent Claim 64 words

A coating in accordance with 7 in which said epoxy resin is comprised in percent by volume of Bisphenol-F epoxy resin (about 80-95%); fumed silica (about 5-10%); and coloring matter (about less than 5%); and said converter is comprised in percent by volume of polyamine compound (about 80-95%); alkyl substituted amino-phenol (about 5.15%); barium sulphate (about 5-10%); and organic acid (less than about 5%).

Claim 12

Dependent Claim 20 words

A corrosion resistant coating composition formed when mixed of an epoxy resin in substantially equal proportions with a polyamine converter.

Claim 13

Dependent Claim 20 words

A corrosion resistant coating composition formed when mixed of an epoxy resin in substantially equal proportions with a polyamine converter.

Claim 14

Dependent Claim 65 words

A coating in accordance with claim 9 in which said epoxy resin is comprised in percent by volume of Bisphenol-F epoxy resin (about 80-95%); fumed silica (about 5.10%); and coloring matter (about less than 5%); and said converter is comprised in percent by volume of poylamine compound (about 80-95%); alkyl substituted amino-phenol (about 5-15%); barium sulphate (about 5-10%); and organic acid (less than about 5%).

Claim 15

Independent Claim 114 words

A method of applying a protectvie coating onto a corrosion susceptible item adapted for use in a marine environment comprising the sequential steps of: a. applying a first uninterrupted layer of a marine resistant epoxy composition in encapsulating relation onto a potentially corrosive/erosive susceptible surface of said item; b. applying a first layer of a fibrous reinforcing composition overlying said first epoxy layer while the epoxy thereon is still uncured; c. applying a second uninterrupted layer of a marine resistant epoxy composition in encapsulating relation and superposed to said first applied epoxy layer and the previously applied reinforcing composition; and d. permitting said first and second epoxy layers to cure to a predetermined hardness.

Claim 16

Independent Claim 114 words

A method of applying a protectvie coating onto a corrosion susceptible item adapted for use in a marine environment comprising the sequential steps of: a. applying a first uninterrupted layer of a marine resistant epoxy composition in encapsulating relation onto a potentially corrosive/erosive susceptible surface of said item; b. applying a first layer of a fibrous reinforcing composition overlying said first epoxy layer while the epoxy thereon is still uncured; c. applying a second uninterrupted layer of a marine resistant epoxy composition in encapsulating relation and superposed to said first applied epoxy layer and the previously applied reinforcing composition; and d. permitting said first and second epoxy layers to cure to a predetermined hardness.

Claim 17

Dependent Claim 29 words

The method in accordance with claim 11 in which the step of applying said fibrous composition comprises spiral wrapping a strip of said composition onto said first epoxy layer.

Claim 18

Dependent Claim 43 words

The method in accordance with claim 12 including the additional uninterrupted superposed steps of applying additional layers of epoxy composition by alternately applying said fibrous composition onto each preceding epoxy layer and applying an epoxy layer over each preceding layer of said composition.

Claim 19

Dependent Claim 16 words

The method in accordance with claim 12 in which said fibrous composition comprises a vitrified cloth.

Claim 20

Dependent Claim 53 words

The method in accordance with claim 11 in which said coating is to be applied for restoration of an item existing in a marine environment and said coating application steps are preceded by the step of cleaning existing corrosion from the surface of the item onto which the coating is to be applied.

Claim 21

Dependent Claim 18 words

The method in accordance with claim 12 in which said corrosion cleaning step comprises abrasive blasting the surface.

Claim 22

Dependent Claim 36 words

The method in accordance with claim 16 in which said coating application steps are conducted at least partially underwater against an underwater section of said item and said epoxy layers are characterized by underwater curign capability.

Claim 23

Dependent Claim 42 words

The method in accordance with claim 17 in which the water of said marine use comprises sea water and said coating is applied to at least a section of said item standing in the splash or tidal zones of said sea water.

Claim 24

Dependent Claim 40 words

The method in accordance with claim 18 in which said item comprises a riser on an offshore platform for transmitting oil recovery and said riser extends from near the sea bottom to an above water level location on said platform.

Claim 25

Dependent Claim 28 words

The method in accordance with claim 11 in which said epoxy composition comprises a two-part mixture in substantially equal proportions of a polyamine converter and an epoxy resin.

Claim 26

Dependent Claim 64 words

The method in accordance with claim 20 in which said epoxy resin is comprised in percent by volume of Bisphenol-F resin (about 80-95%); fumed silica (about 5.10%); and coloring matter (about less than 5%); and said converter is comprised in percent by volume of poylamine compound (about 80-95%); alkyl substituted amino-phenol (about 5-15%); barium sulphate (about 5-10%); and organic acid (less than about 5%).

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1995-02-10	1995-08-12	1996-02-11	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1999-02-10	1999-08-12	2000-02-11	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2003-02-10	2003-08-12	2004-02-11	$7700.00	Window Closed / Lapsed

Coatings and process affording corrosion protection for marine structures

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