Thermal transfer printing
AssigneeBASF SE
InventorsRuediger Sens, Karl-Heinz Etzbach
Life of this patent
Estimating the term…
Abstract
Anthraquinone dyes I useful for thermal transfer printing have the formula ##STR1## where R is alkyl, alkoxyalkyl, aryloxyalkyl, alkanoyloxyalkyl, alkoxycarbonyloxyalkyl or alkoxycarbonylalkyl, which may each contain up to 20 carbon atoms and whose carbon chains may be interrupted by form one to four oxygen atoms in ether function, or is C.sub.5 -C.sub.8 -cycloalkyl or phenyl which may each be substituted by C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy.
Claims3
In a process for thermotransfer printing, wherein the improvement comprises using as the transfer dye an anthraquinone dye of the formula I ##STR5## where R is alkyl, alkoxyalkyl, aryloxyalkyl, alkanoyloxyalkyl, alkoxycarbonyloxyalkyl or alkoxycarbonylalkyl, which may each contain up to 20 carbon atoms and whose carbon chains may be interrupted by from one to four oxygen atoms in ether function, or is C.sub.5 -C.sub.8 -cycloalkyl or phenyl which may each be substituted by C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy.
Dependencies are inferred from the claim text.