Method of removing coating and restoring wood

Details Method of removing coating and restoring wood Method of removing coating and restoring wood

1987-02-17

1988-03-29

Willis, Prince E.

Cleaning and liquid contact with solids

Processes

Using sequentially applied treating agents

134 28, 134 29, 134 38, 134 40, 252156, 252158, 252159, 252DIG14, C11D 712, B08B 700

Patent

active

047341386

ABSTRACT:
Methods are disclosed for the removal of paints, stains, varnishes, resins, grease, wood pitch, urea and phenolic resins, creosote, fungi, algae, moss, pulp mill black liquor, and resin glue. Also disclosed are methods of restoring old, weather-beaten or water-stained wood. The methods generally comprise application of compositions consisting essentially of an aqueous solution of an alkali metal hydroxide, sodium bicarbonate, ethylene glycol, glycerol, and xanthan gum. Enhanced effectiveness of the compositions is obtained in some cases by further application of a weakly acidic oxalic acid solution. The compositions are applied to the surface having the coating desired to be removed by brushing, spraying, and the like, allowed to stand for a time, then either wiped off or washed off with water, except in the case of creosote removal, where the composition is allowed to dry and then removed by conventional methods.

REFERENCES:
patent: 2827439 (1958-03-01), Helper
patent: 3410805 (1968-11-01), Goldsmith et al.
patent: 3529999 (1970-09-01), Boeniger
patent: 4193886 (1980-03-01), Schoenholz et al.
patent: 4502891 (1985-03-01), Brocklehurst et al.
patent: 4537705 (1985-08-01), Mahoney et al.
patent: 4643840 (1987-02-01), Brocklehurst et al.

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