# US 7,608,550 B2 · Fire retardant fiberglass mat

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- Number: US 7,608,550 B2
- Document ID: US7608550B2
- Status: Granted
- Kind: B2
- Application number: 11/267,346
- Filed: 2005-11-04
- Published: 2007-05-10
- Granted: 2009-10-27
- Earliest claimed: 2005-11-04
- Assignees: Johns Manville
- Inventors: Glenda Beth Bennett
- Web page: https://patentgrep.com/patent/US7608550B2

## CPC

- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- B32B 5/022: {Non-woven fabric}
- B32B 27/04: as impregnant, bonding, or embedding substance {(not used)}
- B32B 27/18: characterised by the use of special additives
- C09K 21/14: Macromolecular materials
- B32B 2262/101: Glass fibres
- B32B 2307/3065: Flame resistant or retardant, fire resistant or retardant
- Y10S 428/92: Fire or heat protection feature
- Y10S 428/921: Fire or flameproofing
- Y10T 442/2631: Coating or impregnation provides heat or fire protection
- Y10T 442/2672: Phosphorus containing
- Y10T 442/2721: Nitrogen containing
- Y10T 442/2926: Coated or impregnated inorganic fiber fabric
- Y10T 442/2992: Coated or impregnated glass fiber fabric
- Y10T 442/623: Microfiber is glass
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Dispersion of a fire retardant agent in a binder used to form a fire retardant fiberglass mat allows for easy and uniform incorporation of the fire retardant agent into the fire retardant fiberglass mat. The fire retardant fiberglass mat is bonded to a fiberglass insulation batt, providing fire retardant composite useful as duct board or equipment liner.

## Claims

### Claim 1

A fire retardant fiberglass mat comprising:
a) 50 to 95 weight percent glass fibers;
b) 5 to 50 weight percent binder; and
c) a fire retardant composition comprised of a metal hydroxide and carbon black dispersed in the binder.

### Claim 2 (depends on 1)

The fire retardant fiberglass mat of claim 1, wherein the fire retardant composition further comprises a halogen compound, a nitrogen compound or a phosphorus compound.

### Claim 3 (depends on 1)

The fire retardant fiberglass mat of claim 1, wherein the fire retardant composition further comprises a halogen compound.

### Claim 4 (depends on 3)

The fire retardant fiberglass mat of claim 3, wherein the halogen compound is a halogenated aliphatic carbon compound.

### Claim 5 (depends on 1)

The fire retardant fiberglass mat of claim 1, wherein the binder comprises one or more binders selected from the group consisting of acrylic binder, urea-formaldehyde binder, melamine formaldehyde binder, and combinations thereof.

### Claim 6 (depends on 1)

The fire retardant fiberglass mat of claim 1, wherein the binder comprises 10 to 30 weight percent of the fire retardant fiberglass mat and the glass fibers comprise 70 to 90 weight percent of the fire retardant fiberglass mat.

### Claim 7 (depends on 1)

The fire retardant fiberglass mat of claim 1, wherein the metal hydroxide comprises magnesium hydroxide or aluminum trihydroxide.

### Claim 8

Fire retardant fiberglass insulation comprising:
a) a fiberglass insulation batt; and
b) a fire retardant fiberglass facer mat bonded to the fiberglass insulation, the fire retardant fiberglass facer mat comprising:
i) 50 to 95 weight percent glass fibers;
ii) 5 to 50 weight percent binder; and
iii) a fire retardant composition comprised of a metal hydroxide and carbon black dispersed in the binder.

### Claim 9 (depends on 8)

The fire retardant fiberglass insulation of claim 8, wherein the fire retardant composition further comprises a halogen compound, a nitrogen compound or a phosphorus compound.

### Claim 10 (depends on 8)

The fire retardant fiberglass insulation of claim 8, wherein the fire retardant composition further comprises a halogen compound.

### Claim 11 (depends on 10)

The fire retardant fiberglass insulation of claim 10, wherein the halogen compound is a halogenated aliphatic carbon compound.

### Claim 12 (depends on 8)

The fire retardant fiberglass insulation of claim 8, wherein the binder comprises one or more binders selected from the group consisting of acrylic binder, urea-formaldehyde binder, melamine formaldehyde binder, and combinations thereof.

### Claim 13 (depends on 8)

The fire retardant fiberglass insulation of claim 8, wherein the binder comprises 10 to 30 weight percent of the fire retardant fiberglass facer mat and the glass fibers comprise 70 to 90 weight percent of the fire retardant fiberglass mat.

### Claim 14 (depends on 8)

The fire retardant fiberglass insulation of claim 8, wherein the metal hydroxide comprises magnesium hydroxide or aluminum trihydroxide.

### Claim 15 (depends on 8)

The fire retardant fiberglass insulation of claim 8, wherein the fiberglass insulation batt is fiberglass duct liner.

### Claim 16 (depends on 8)

The fire retardant fiberglass insulation of claim 8, wherein the fiberglass insulation batt is fiberglass equipment liner.

### Claim 17

A method of forming fire retardant fiberglass insulation comprising:
a) forming a fire retardant fiberglass facer mat comprising:
i)50 to 95 weight percent glass fibers;
ii)5 to 50 weight percent binder; and
iii) a fire retardant composition comprised of a metal hydroxide and carbon black dispersed in the binder; and
b) bonding the fire retardant fiberglass facer mat to a face of a fiberglass insulation batt.

### Claim 18 (depends on 17)

The method of claim 17, wherein the binder comprises 10 to 30 weight percent of the fire retardant fiberglass facer mat and the glass fibers comprise 70 to 90 weight percent of the fire retardant fiberglass mat.

### Claim 19 (depends on 17)

The method of claim 17, wherein the fire retardant composition further comprises a halogen compound, nitrogen compound or phosphorus compound.

### Claim 20 (depends on 17)

The method of claim 17, wherein the fiberglass insulation batt is fiberglass duct liner.

### Claim 21 (depends on 17)

The method of claim 17, wherein the fiberglass insulation batt is fiberglass equipment liner.