Formaldehyde-free protein-containing binder compositions

摘要

A wood-containing composite are described that may include a lignocellulosic material, and a formaldehyde-free binder in contact with at least a portion of the lignocellulose material. The binder is formed from a binder composition that includes a soy flour, a polymer, and a crosslinking agent, at least a portion of each of which are covalently crosslinked to each other in the binder. Also described are methods of making wood-containing composites by providing a pre-mixed, one-part binder composition of at least 60 wt. % soy flour, a polymer, and a crosslinking agent. The binder composition is applied to lignocellulosic material, and the combination may be heated at a temperature of about 100° C. or more to cure the binder composition into a binder. The cured binder has the soy protein, polymer, and crosslinking agent covalently bonded to each other.

主权项

1. A wood-containing composite comprising:
a lignocellulosic material; and a formaldehyde-free binder in contact with at least a portion of the lignocellulose material, wherein the formaldehyde-free binder is formed from an aqueous mixture comprising soy flour dispersed in an aqueous solution of a solution polymer of styrene and maleic anhydride, and a crosslinking agent, wherein the aqueous solution does not include an emulsion of the solution polymer or the crosslinking agent, and wherein at least a portion of each of the soy flour, the solution polymer, and the crosslinking agent are covalently bonded to each other in the binder.