Bath for the electrochemical deposition of high-gloss white rhodium coatings and whitening agent for the same
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United States of America Patent
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Apr 12, 2005
Grant Date -
Jun 19, 2003
app pub date -
Oct 14, 2002
filing date -
Dec 23, 1999
priority date (Note) -
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Abstract
The invention concerns a bath for the electrochemical deposition of high-gloss white rhodium coatings and a whitening agent for the same. The brightness or degree of whiteness of the deposited coatings is significantly increased by means of compounds having the formula R--SO.sub.m --H, wherein m is the numbers 3 or 4 and R is a straight-chain or branched chain or cyclic alkyl group having up to 20 C atoms, as a whitening agent. The thickness of the coating that can be deposited without a bloom is also significantly increased.
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