Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-06-10
1977-01-25
Woodberry, Edward M.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
21 7, 260 69R, 427440, C08L 500
Patent
active
040050394
ABSTRACT:
Compositions suitable for use in bulking timber, and method for bulking timber comprising impregnating timber with said compositions, drying the treated timber, and curing the bulking compositions by heating, are provided. The composition comprises at least one modified polyol in which at least two of the free hydroxyl groups have been converted to -0-3-alkylenamido ether groups; an amino resin precursor containing reactive N-hydroxymethyl groups; a curing catayst for catalyzing the curing of the composition when heated; and a polar solvent capable of swelling wood. The starting polyol is preferably sucrose, and the amino resin is preferably ureaformaldehyde precursor. The compositions remain stable for prolonged periods of time at ambient temperatures, and timber bulked with the compositions in accordance with the method have excellent dimensional stability.
REFERENCES:
patent: 3460979 (1969-08-01), Giese et al.
patent: 3493417 (1970-03-01), Moren et al.
patent: 3769143 (1973-10-01), Kulesza
Chem. Absts., vol. 65: 15660f, Aktiebolag, "Wood-Impregnation with Polyalcohol Ethers or Esters."
Research Corporation
Woodberry Edward M.
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