Wood treatment for dimensional stabilization
First Claim
1. A treated wood product comprising a composition consisting essentially of polypropylene glycol or a polypropylene glycol copolymer with an average molecular weight of between at least 500 and 100,000, wherein the treated wood product has a retention of at least 5 pounds per cubic foot (pcf) of the polypropylene glycol or a polypropylene glycol copolymer, and wherein the treated wood product has improved dimensional stability compared to an untreated wood product, and wherein the treated wood product is produced by a treatment process comprising pressure, vacuum, or microwave treatment.
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Abstract
A process is provided for treating wood products including lumber, plywood and other engineered wood products comprising the steps of contacting a composition comprising a polypropylene glycol, a high molecular weight polyethylene glycol, a polyether polyol having low solubility in water, or a polytetrahydrofuran, or hydrophobic polyether polyol, with the wood product. The invention also provides wood products comprising a polypropylene glycol, a high molecular weight polyethylene glycol, a polyether polyol having low solubility in water, or a polytetrahydrofuran, or hydrophobic polyether polyol, that have greater dimensional stability compared to an untreated wood product.
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Citations
57 Claims
- 1. A treated wood product comprising a composition consisting essentially of polypropylene glycol or a polypropylene glycol copolymer with an average molecular weight of between at least 500 and 100,000, wherein the treated wood product has a retention of at least 5 pounds per cubic foot (pcf) of the polypropylene glycol or a polypropylene glycol copolymer, and wherein the treated wood product has improved dimensional stability compared to an untreated wood product, and wherein the treated wood product is produced by a treatment process comprising pressure, vacuum, or microwave treatment.
- 27. A treated wood product comprising a composition consisting essentially of a polyether polyol having low solubility in water, wherein the treated wood product has a retention of at least 5 pounds per cubic foot (pcf) of the polyether polyol, and wherein the treated wood product has improved dimensional stability compared to an untreated wood product, and wherein the treated wood product is produced by a treatment process comprising pressure, vacuum, or microwave treatment.
- 28. A treated wood product comprising a composition consisting essentially of polypropylene glycol or a polypropylene glycol copolymer with an average molecular weight of between at least 500 and 100,000, wherein the treated wood product has a retention of at least 5 pounds per cubic foot (pcf) of the polypropylene glycol or a polypropylene glycol copolymer, and wherein the treated wood product has improved dimensional stability compared to an untreated wood product.
- 29. A treated wood product comprising a composition consisting essentially of a polyether polyol having low solubility in water, wherein the treated wood product has a retention of at least 5 pounds per cubic foot (pcf) of the polyether polyol, and wherein the treated wood product has improved dimensional stability compared to an untreated wood product.
Specification