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US 6,084,021 AGranted
Modified urea-formaldehyde binder for making fiber mats
AssigneeGeorgia-Pacific Resins, Inc.
InventorsShau-Gan Chang, Larry R. Graves, Charles R. Hunter, Stacey L. Wertz
Life of this patent
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Abstract
An aqueous binder composition containing a urea-formaldehyde resin modified with a water-soluble styrene-maleic anhydride copolymer is used in the preparation of fiber mats.
Claims8
A method of making a fiber mat comprising:
- dispersing fibers in an aqueous medium to form a slurry, forming the slurry into a wet fiber mat, applying an aqueous binder composition comprising as a major component a urea-formaldehyde resin and as a minor component a water-soluble styrene-maleic anhydride copolymer to said wet fiber mat, and curing the binder composition at an elevated temperature.
A fiber mat having good tensile properties comprising said fibers bound together with a cured binder, said binder comprising as a major component a urea-formaldehyde resin and as a minor component a styrene-maleic anhydride copolymer.
A method of making a fiber mat comprising:
- dispersing fibers in an aqueous medium to form a slurry, forming the slurry into a wet fiber mat, applying an aqueous binder composition comprising as a major component a urea-formaldehyde resin and as a minor component a water-soluble styrene-maleic anhydride copolymer to said wet fiber mat, and curing the binder composition at an elevated temperature, wherein a weight to weight ratio of said urea-formaldehyde resin to said styrene-maleic anhydride copolymer is from about 99.9:0.1 to about 70:30, and wherein said elevated temperature is from about 135.degree. C. to about 300.degree. C.
Dependencies are inferred from the claim text.