Binder composition for manufacture of fiberboard
AssigneeJim Walter Research Corp.
InventorMichael G. Israel
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Abstract
A binder for use in the preparation of a synthetic board from cellulosic and/or lignocellulosic material comprising an organic polyisocyanate and a mixture of reactive hydrogen-containing compounds having an average of more than one reactive hydrogen atom per molecule, the mixture containing an ester and/or an amide having a hydrocarbon content sufficient to bring about enhanced board release in the board-forming process and to contribute to superior moisture resistance in the finished board.
Claims22
A synthetic board comprising cellulosic material bonded together with a binder comprising an organic polyisocyanate and a mixture of reactive hydrogen-containing compounds containing an average of more than one reactive hydrogen atom per molecule, said mixture comprising a member selected from the group consisting of
- (a) a blend of (i) an aromatic polyester polyol and (ii) a reaction product of at least one fatty acid and at least one polyol,
- (b) a reaction product of at least one polyol and at least two coreactants selected from the group consisting of carboxylic acids, carboxylic acid anhydrides, carboxylic acid esters and mixtures thereof, the coreactants including at least one fatty acid and at least one aromatic compound selected from the group consisting of o-phthalic acids, isophthalic acids and terephthalic acids or the corresponding acid anhydrides or acid esters, and
- (c) mixtures thereof, wherein each fatty acid contains from 10 to 54 carbon atoms.
Dependencies are inferred from the claim text.