Heat-curable tannin-based binding agents
AssigneeRutgerswerke Aktiengesellschaft
InventorsAntonio Pizzi, Willi Roll, Berthold Dombo
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Abstract
A heat-curable, formaldehyde-free binding agent comprising a polyflavonoid type tannin and as a curing catalyst, a compound having a weak acid reaction curable at relatively high temperatures and compatible with cellulose containing materials such as wood chips for the production of particle boards.
Claims9
A heat-curable, formaldehyde-free binding agent comprising at least one polyflavonoid tannin selected from the group consisting of tannins of pecan nut, pinus radiata, acacia mearnsii (mimosa), schinopsis and balansae (quebracho) and as a curing catalyst, a compound having a weak acid reaction.
A process for the production of cellulose-containing product of claim 9 comprising mixing a cellulose-containing material with a heat-curable binding agent based on at least one polyflavonoid tannin selected from the group consisting of tannins of pecan nut, pinus radiata, acacia mearnsii (mimosa), schinopsis and balansae (quebracho) and a curing catalyst having weak acid reactions, placing the resulting mixture in a mold and heating the mixture in the mold at 150.degree. to 210.degree. C. at a pressure of 0.1 to 4 MPa/mm.sup.2.
Dependencies are inferred from the claim text.