Cleaning and liquid contact with solids – Processes – Using sequentially applied treating agents
Patent
1983-04-07
1985-04-23
Caroff, Marc L.
Cleaning and liquid contact with solids
Processes
Using sequentially applied treating agents
134 42, 156668, 427308, 427325, B08B 308, B29C 1708
Patent
active
045128138
ABSTRACT:
The monourea adduct of sulfuric acid, when combined with water, has the unique ability to ablate the surface of wooden articles without charring or otherwise disfiguring the surface of the wooden article. Thus, wooden articles can be treated to accomplish a variety of purposes by contacting the surface to be treated with a composition containing the monourea adduct of sulfuric acid. Such compositions comprise mixtures of urea and sulfuric acid in which the molar ratio of urea to sulfuric acid is within the range of 1/4 to about 7/4 so that at least about 25 percent of the sulfuric acid is present as the monourea adduct. Such treatment can be employed to modify the dimensions of the article surface, remove stains, mars or other markings, accentuate the hard grain of the article surface, emboss the surface with a predetermined pattern, or accomplish other objectives that result from generally or selectively ablating the article's surface.
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Caroff Marc L.
Laird Michael H.
Sandford Dean
Union Oil Company of California
Wirzbicki Gregory F.
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