Shingle and mat tensile strength with urea formaldehyde resin modifier
AssigneeBuilding Materials Investment Corporation
InventorQinyun Peng
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Abstract
A composite sheet, and a process of making the same, including cured modified urea formaldehyde reinforced by glass fibers. The modifier is an acrylonitrile-butadiene-styrene copolymer. A roofing shingle, formed by coating the composite sheet with filled asphalt, represents a major application of the composite sheet.
Claims19
A composite sheet material comprising a cured urea formaldehyde mat reinforced by glass fibers wherein said urea formaldehyde is modified by an acrylonitrile-butadiene-styrene copolymer prior to curing.
A process of making a composite sheet comprising the steps of:
- dispersing glass fibers in an aqueous dispersant;
- screening said glass fiber dispersion whereby said dispersed glass fibers form a mat;
- contacting said mat with a urea formaldehyde resin modified with an acrylonitrile-butadiene-styrene copolymer;
- and
- curing said modified urea formaldehyde resin.
A process of making a roofing shingle comprising the steps of:
- dispersing glass fibers in an aqueous dispersant;
- screening said glass fiber dispersion whereby said dispersed glass fibers form a mat;
- contacting said mat with a urea formaldehyde resin modified with an acrylonitrile-butadiene-styrene copolymer;
- curing said modified urea formaldehyde resin, whereby a cured urea formaldehyde mat reinforced with glass fibers is formed;
- and
- coating said cured mat with filled asphalt.
Dependencies are inferred from the claim text.