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US 4,017,461 AGranted
Method for manufacturing liquid resinous furan-formaldehyde condensation products
AssigneeThe Quaker Oats Company
InventorsAndrew P. Dunlop, Rudy F. Macander
Life of this patent
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Abstract
Liquid resinous condensation products are produced by contacting furan and formaldehyde in the presence of an acid catalyst while maintaining an excess of furan during the contacting. The method produces liquid resinous condensation products which are useful as binders in the manufacture of composite articles, or as binder modifiers.
Claims31
A method for producing a liquid resin comprising:
- contacting formaldehyde and a furan of the formula:
- ##STR2## where R, and R' are hydrogen, halogen, alkyl, phenyl, halogen-substituted phenyl, alkyl-substituted phenyl, carboxy, hydroxy-alkyl, or carboxyalkyl, and in which the alkyl substituents have from 1 to 10 carbons, said contacting takes place in the presence of a catalytically effective amount of acid catalyst for a period of time sufficient to produce a liquid resinous material, said furan being present during said contacting in a quantity sufficient to provide more than 1.1 mole of said furan per mole of formaldehyde.
The method of producing a liquid resin comprising:
- contacting furan and formaldehyde in the presence of a catalytically effective amount of acid catalyst for a period of time sufficient to produce a liquid resin said furan being present during said contacting in a quantity sufficient to provide 1.1 or more moles of furan per mole of formaldehyde.
The method of producing a liquid resin comprising:
- contacting furan and formaldehyde in the presence of a catalytically effective amount of acid catalyst said contacting taking place at elevated temperature above 30.degree. C. and for a period of time sufficient to produce a resinous material, said furan being present during said contacting in a quantity sufficient to provide 1.1 or more moles of furan per mole of formaldehyde.
Dependencies are inferred from the claim text.