# US 5,580,648 A · Reinforcement system for mastic intumescent fire protection coatings

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- Number: US 5,580,648 A
- Document ID: US5580648A
- Status: Granted
- Kind: A
- Application number: 08/482,549
- Filed: 1995-06-07
- Granted: 1996-12-03
- Earliest claimed: 1992-12-01
- Assignees: Avco Corporation
- Inventors: George K. Castle; John J. Gaffney
- Web page: https://patentgrep.com/patent/US5580648A

## CPC

- E04B 1/944: {covered with fire-proofing material}
- D03D 15/513: heat-resistant or fireproof
- D10B 2331/021: aromatic polyamides, e.g. aramides
- Y10S 428/921: Fire or flameproofing
- Y10T 442/134: Including a carbon or carbonized fiber
- E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001})
- D03D: WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A reinforcement system for mastic intumescent fire protection coatings. Free floating carbon mesh embedded in the coating is used to reinforce the coating. Optionally, the carbon mesh may be used in conjunction with mechanically attached reinforcements.

## Claims

### Claim 1

A fire retardant coating system for retarding the effects of fire on the structural elements of a hydrocarbon processing facility comprising:
a. a substrate consisting of the outer surface of the structural element;
b. a first layer of an intumescent mastic material applied to the substrate;
c. a second layer of a carbon mesh material applied over the first layer without mechanical connection to the substrate, having a carbon content in excess of sixty percent to a weight in the range of 0.07 and 0.012 pounds per square yard, and further said material capable of maintaining its structural integrity at temperatures in excess of 900 degrees F., said mesh constructed with openings in the range of 1/16 to 1/2 inches; and
d. a third layer of the intumescent mastic material applied over the carbon mesh to fill the openings of the mesh and form a system in which the carbon mesh is imbedded in the mastic to provide structure to the coating system while allowing movement of the intumescent mastic as it expands to form a char when exposed to heat.

### Claim 2 (depends on 1)

A fire retardant coating system for retarding the effects of fire on the structural elements of a hydrocarbon processing facility as described in claim 1 wherein the carbon mesh has a carbon content in excess of ninety five percent and a weight in the range of 0.14 and 0.25 pounds per square yard.

### Claim 3 (depends on 1)

A fire retardant coating system for retarding the effects of fire on the structural elements of a hydrocarbon processing facility as described in claim 1 wherein the carbon mesh layer is pleated to provide a greater flexibility during expansion of the intumescent material to form a char when exposed to heat.