Emulsion polymers for use as a urea formaldehyde resin modifier
AssigneeThe B. F. Goodrich Company
InventorsStephen F. Drews, Leo A. Tischer
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Abstract
Emulsion copolymers, for use as urea formaldehyde resin modifiers, are formed from vinyl chloride monomers, softening monomers, and functional monomers. The copolymer when blended with formaldehyde resins and used as a binder yields improved wet and dry tensile strength and better tear resistance. These binders are particularly useful as glass mat binders for the production of roofing shingles.
Claims17
A nonwoven glass mat binder for use in forming a roofing substrate formed from a blend of urea formaldehyde resin and a copolymer, said urea formaldehyde resin and said copolymer being present in a weight ratio of about 9:1 and said copolymer being made from at least:
- a) a vinyl chloride monomer;
- b) a functional monomer, for crosslinking the vinyl chloride polymer and/or reacting with the urea formaldehyde in an amount of from about 0.5 to about 8% by weight;
- and
- c) an effective amount of a softening monomer, selected from the group consisting essentially of acrylates, olefins and vinyl esters in an amount of from about 9.5 to about 70 percent by weight, to result in suitable wet and dry tensile strength and resulting in a mat having increased flexibility.
A nonwoven glass mat binder for use in forming a roofing substrate formed from a blend of urea formaldehyde resin and a copolymer made from at least:
- a) 35 to 70 percent by weight vinyl chloride monomer;
- b) a functional monomer, for crosslinking the vinyl chloride polymer and/or reacting with the urea formaldehyde in an amount of from about 0.5 to about 8 percent by weight;
- and
- c) an effective amount of a softening monomer, selected from the group consisting essentially of acrylates, olefins and vinyl esters in an amount of from bout 9.5 to 70 percent by weight, to result in suitable wet and dry tensile strength, and which results in a mat having increased flexibility.
A nonwoven glass mat binder for use in forming a roofing substrate formed from a blend of urea formaldehyde resin and a copolymer comprising:
- a) 45 to 55 percent by weight vinyl chloride monomer;
- b) a functional monomer, for crosslinking the vinyl chloride polymer and/or reacting with the urea formaldehyde in an amount of from about 0.5 to about 8 percent by weight;
- and
- c) an effective amount of a softening monomer, selected from the group consisting essentially of acrylates, olefins and vinyl esters in an amount of from bout 9.5 to 70 percent by weight, to result in suitable wet and dry tensile strength, and which results in a mat having increased flexibility.
Dependencies are inferred from the claim text.