Compositions: coating or plastic – Coating or plastic compositions – Heterocyclic
Reexamination Certificate
2007-04-17
2007-04-17
Brunsman, David M. (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Heterocyclic
C501S090000, C501S094000, C501S099000, C501S100000, C501S101000, C501S109000, C501S127000, C501S128000, C501S133000, C264S029100, C264S030000, C264S331110, C264S667000, C523S140000, C523S141000, C523S144000
Reexamination Certificate
active
11247987
ABSTRACT:
This invention relates to refractory mixes produced by mixing a refractory material with an organic binder and heating to a temperature of typically from about 50° C. to about 100° C. to form a stable composite granulate. The refractor mixes comprise a major amount of a refractory material and a minor amount of a binder composition comprising (a) condensed tannin and (b) furfuryl alcohol. The refractory mixes are used to prepare shaped (e.g. bricks) and unshaped (e.g. blast furnace tap holes, troughs, and tundish liners) refractory products. The invention also relates to a process for preparing the refractory products using the refractory mixes.
REFERENCES:
patent: 4357194 (1982-11-01), Stofko
patent: 2004/0115455 (2004-06-01), Quist et al.
“Natural Tannin-Based Adhesives for Wood Products of Low or No Formaldehyde Emission”, FAIR, www.biomatnet.org/secure/Fair/F340.htm, Jan. 1999.
Foo et al, “Condensed Tannins: Reactions of Model Compounds with Furfuryl Alcohol and Furfuraldehyde”, Journal of Wood Chemistry and Technology, 5(1), pp. 135-158, 1985, no month available>.
Trosa et al, “Industrial hardboard and other panels binder from tannin/furfuryl alcohol in absence of formaldehyde”, Holz Als Roh- und Werkstoff, 56, pp. 213-214, 1998, no month available.
Ashland Licensing and Intellectual Property LLC
Brunsman David M.
Hedden David L.
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