Fire resistant wood products
AssigneeWeyerhaeuser NR Company
InventorsJack G. Winterowd, Glen Robak
Life of this patent
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Abstract
The present disclosure is directed generally towards fire-resistant wood products and formulations for fire-resistant coatings. In some embodiments, the disclosure includes a fire-resistant coating comprising an aromatic isocyanate (present in a quantity ranging from about 15% to about 39%), castor oil (present in a quantity ranging from about 37% to about 65%), and intumescent particles (present in a quantity ranging from about 1% to about 40%). Further aspects are directed towards materials such as wood products coated with fire-resistant coatings according to embodiments of the disclosure.
Claims21
A fire-resistant coating for a wood product, the fire-resistant coating being a formulation comprising:
- a polyurethane matrix comprising:
- an aromatic isocyanate, the aromatic isocyanate being present in a quantity ranging from 24% to 39% by weight of the formulation;
- and
- castor oil, the castor oil being present in a quantity ranging from 37% to 65% by weight of the formulation;
- and
- intumescent particles embedded in the polyurethane matrix.
A fire-resistant wood product comprising:
- a wood element having one or more surfaces;
- a fire-resistant coating disposed on at least a portion of the one or more surfaces, the fire resistant coating comprising:
- an aromatic isocyanate present in a quantity ranging from 24% to 39% by weight of the coating;
- and
- castor oil present in a quantity ranging from 37% to 65% by weight of the coating;
- and
- intumescent particles present in a quantity ranging from 1% to 40% by weight of the coating.
A fire-resistant wood product comprising:
- a top flange;
- a bottom flange;
- and
- one or more webstock members connecting the top flange to the bottom flange;
- wherein at least a portion of the I-joist is coated in a fire-resistant coating, the fire resistant coating comprising:
- an aromatic isocyanate present in a quantity ranging from 24% to 39% by weight of the coating;
- and
- castor oil present in a quantity ranging from 37% to 65% by weight of the coating;
- and
- intumescent particles present in a quantity ranging from 1% to 40% by weight of the coating.
Dependencies are inferred from the claim text.