Binders containing an aldehyde-based resin and an isocyanate-based resin and methods for making composite lignocellulose products therefrom

A method for making a composite product, comprising:

• combining a plurality of lignocellulose substrates and a binder to produce a resinated furnish, wherein the binder comprises:
• about 30 wt % to about 40 wt % of solids comprising a urea-modified aldehyde-based resin;
• about 0.1 wt % to about 3 wt % of solids comprising an isocyanate-based resin;
• about 0.1 wt % to about 12 wt % of an extender;
• and
• about 50 wt % to about 62 wt % of a liquid medium, wherein all weight percent values are based on a total weight of the binder, and wherein the binder has a sodium hydroxide equivalent weight alkalinity of about 3 wt % to about 9 wt %;
• and
• heating the resinated furnish to a temperature of about 60° C. to about 300° C. to at least partially cure the binder to produce a composite lignocellulose product.

A method for making a binder, comprising:

• contacting solids comprising a urea-modified aldehyde-based resin, an isocyanate-based resin, an extender, and water to produce the binder, wherein the binder comprises:
• about 30 wt % to about 40 wt % of the solids comprising the urea-modified aldehyde-based resin;
• about 0.1 wt % to about 3 wt % of solids comprising the isocyanate-based resin;
• about 0.1 wt % to about 12 wt % of the extender;
• and
• about 50 wt % to about 62 wt % of the liquid medium, wherein all weight percent values are based on a total weight of the binder, and wherein the binder has a sodium hydroxide equivalent weight alkalinity of about 3 wt % to about 9 wt %.