Formaldehyde-free wood binder
AssigneeSestec Sp. z o.o.
InventorsHans-Joachim Edelmann, Oswald Sander
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Abstract
The formaldehyde-free binder for materials containing cellulose contains a hydroxy aldehyde resin polycondensed with an ammonium salt, the resin being obtained, in especially preferred embodiments, from glycerin, in situ, with the aid of hydrogen peroxide. A protein component consisting of animal blood is added. The binder is urea-free and can be used as a one-component or two-component binder. It binds materials such as wood, paper and other natural fibres to form high-quality composite material products.
Claims22
A binder for cellulose-containing materials, which comprises a hydroxyaldehyde resin which is condensed with an ammonium salt, wherein said hydroxyaldehyde resin is formed in situ from an at least difunctional hydroxy compound and an oxidizing agent comprising hydrogen peroxide in an amount between 1 and 10 weight percent, based on the total weight of said binder, wherein said binder further comprises at least a portion of said at least difunctional hydroxy compound and at least a portion of said oxidizing agent, wherein said ammonium salt is present in an amount of at least 15 weight percent, based on the total weight of said binder.
A process for binding cellulose-containing materials, said process comprising forming a hydroxyaldehyde with an at least difunctional hydroxy compound and an oxidizing agent comprising hydrogen peroxide and condensing at least a portion of said hydroxyaldehyde with an ammonium salt to form a binder in the presence of at least a portion of said at least difunctional hydroxy compound and at least a portion of said oxidizing agent, wherein said hydrogen peroxide is present in an amount between 1 and 10 weight percent, based on the total weight of the binder and said ammonium salt is present in an amount of at least 15 weight percent, based on the total weight of the binder.
Dependencies are inferred from the claim text.