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US 8,945,706 B2Granted
Polymeric composition for cellulosic material binding and modifications
OwnerYin Wanginventor
Life of this patent
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Abstract
A polymer composition suitable for wood treatment or binding comprises a reaction product of at least a polyol and at least a crosslinking agent. The crosslinking agent has at least 2 carboxylic acid groups per molecule. A wood product comprising a wood substrate and a polymer composition as well as a wood treatment process are also disclosed.
Claims15
A polymer composition suitable for wood treatment or binding consists essentially of a reaction product of at least a polyol and at least a crosslinking agent and a solvent;
- said crosslinking agent having at least 2 carboxylic acid groups per molecule and said polyol consists of a maltodextrin or a derivative of maltodextrin which have a dextrose equivalent value between 2 and 12, wherein said crosslinking agent is cis- or trans-butenedioic acid, EDTA (ethylenediamine-tetraacetic acid), citric acid, citraconic acid, butanetetracarboxylic acid (BTCA), tartaric acid, succinic acid, maleic acid, maleic anhydride, mesaconic acid, fatty acids, unsaturated fatty acid, itaconic acid, or any mixtures thereof.
A wood product comprises:
- a wood substrate having voids and a polymer composition disposed at least partially inside said voids;
- said polymer composition consisting essentially of a reaction product of at least a polyol comprising maltodextrin having a dextrose equivalent value between 2 and 12 and at least a crosslinking agent having at least 2 carboxylic acid groups per molecule and optionally sorbic acid or boric acid, optionally a metal compound selected from the group consisting of zinc acetate, zinc citrate, calcium formate, calcium acetate, magnesium acetate, magnesium citrate, magnesium formate, and zirconium carbonate, and optionally at least one of ammonium phosphate, aluminum oxide, magnesium oxide, melamine, dicyanodiamide, and urea;
- wherein said crosslinking agent is cis- or trans-butenedioic acid, EDTA, citric acid, citraconic acid, butanetetracarboxylic acid (BTCA), maleic acid, maleic anhydride, tartaric acid, succinic acid, mesaconic acid, unsaturated fatty acid, itaconic acid or any mixtures thereof;
- and wherein said wood substrate has been impregnated with said polyol and said crosslinking agent, and said polymer composition is formed from the polyol and the crosslinking agent after the impregnation.
1 more element
Dependencies are inferred from the claim text.