Binder composition comprising condensed tannin and furfuryl...

Details Binder composition comprising condensed tannin and furfuryl... Binder composition comprising condensed tannin and furfuryl...

2007-03-01

2008-08-05

Brunsman, David M (Department: 1793)

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

C106S287200, C523S144000

Reexamination Certificate

active

07407543

ABSTRACT:
This invention relates to a binder composition comprising condensed tannin and furfuryl alcohol. The composition can be used to prepare foundry mixes. The foundry mixes are prepared by mixing the composition with an acid or salt of an acid. The foundry mixes are then shaped into molds or cores and cured by heating or by the no-bake process with stronger acid curing catalysts. The molds and cores are used in casting metal articles.

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Natural Tannin-Based Adhesives for Wood Composite Products of Low or No Formaldehyde Emission:, FAIR, http://www.blomatnet.org/secure/Fair/F340.htm, (Jan. 1999).
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