Transfer printing process
AssigneeBayer Aktiengesellschaft
InventorsGerhard Wolfrum, Werner Kuhnel, Erich Klauke, Gerhard Buttner
Life of this patent
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Abstract
The invention relates to the transfer printing hydrophobic fibre materials using paper supports which are printed with azo dyestuffs of the formula ##STR1## wherein X.sub.1 and X.sub.2 represent hydrogen or alkyl or cycloalkyl radicals and n represents 1-3, and wherein the benzene ring A can contain non-ionic substituents and the benzene ring B can contain customary non-polar substituents.
Claims8
In a process for printing hydrophobic fiber materials selected from the group consisting of polyesters and polyamides by the sublimation transfer printing process, the improvement which comprises employing sublimable azo dyestuffs which have the formula ##STR208## wherein X.sub.1 and X.sub.2 are hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl, substituted C.sub.1 -C.sub.4 -alkyl, or substituted C.sub.5 -C.sub.7 -cycloalkyl, wherein the substituents are C.sub.1 -C.sub.2 -alkoxy, halogen, or phenyl;
- n is a number from 1 to 3;
- A is substituted as shown in the above formula or is further substituted by NO.sub.2, CN, halogen, SO.sub.2 CH.sub.3, SO.sub.2 C.sub.2 H.sub.5, C.sub.1 -C.sub.4 -alkyl, or C.sub.1 -C.sub.4 -alkoxy;
- and
- B is as shown in the formula or is further substituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, halogen, benzyloxy, phenoxy, C.sub.1 -C.sub.4 -alkylcarbonylamino, formylamino, halo, (C.sub.1 -C.sub.4 -alkyl) carbonylamino, or haloformylamino.
Dependencies are inferred from the claim text.