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US4295849A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for the preparation of dyestuff formulations

Assignee: Individual
•
Filing: 1977-03-09
•
Granted: 1981-10-20
•
Expires: 1997-03-09
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Abstract

Abstract The invention relates to the preparation of pulverulent formulations of transfer printing dyestuffs. The process is characterized in that the aqueous dispersions of these dyestuffs are mixed with compounds of the formula R--Z wherein R denotes a hydrophobic radical with at least 5 C atoms and Z denotes the groups --COOH, --NH 2 , --O(C 2 H 4 O) n H, --NX 1 X 2 or --NH(CH 2 ) m NX 1 X 2 , in which n is 0, 1 or 2, m is 2-6 and X 1 /X 2 is H or C 1 -C 4 -alkyl, with the proviso that R represents a non-cyclic aliphatic radical when Z represents COOH, and the aqueous mixtures are converted into dry pulverulent form in a manner which is in itself known. The preparation can easily be dispersed in organic media, for example in organic solvents such as those customary in the preparation of printing pastes, and are outstandingly suitable for the preparation of printing inks for printing temporary supports for heat transfer printing.

Inventors

  • 👤 Konrad Nonn
  • 👤 Karlheinz Wolf
  • 👤 Artur Haus
  • 👤 Reinhold Hornle

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 23:52
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0092; D; D06; D06P; D06P5/00; D06P5/003; D06P5/004

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 97 words
Process for the preparation of pulverulent formulations suitable for use in transfer printing, which can be dispersed easily in organic media, of dyestuffs which are sublimable at 100°-230° C., wherein aqueous dispersions of said dyestuffs or aqueous solutions or dispersions of precursors of said dyestuffs are mixed with compounds of the formula R--Z wherein R is C 10 -C 20 -alkyl, and Z is NH 2 , NH(CH 2 ) 3 --NH 2 or OH, converting any of said precursors into the corresponding dyestuffs, and drying the resulting aqueous solution or dispersion into a dry pulverulent product.
Claim 2
Dependent Claim 97 words
Process for the preparation of pulverulent formulations suitable for use in transfer printing, which can be dispersed easily in organic media, of dyestuffs which are sublimable at 100°-230° C., wherein aqueous dispersions of said dyestuffs or aqueous solutions or dispersions of precursors of said dyestuffs are mixed with compounds of the formula R--Z wherein R is C 10 -C 20 -alkyl, and Z is NH 2 , NH(CH 2 ) 3 --NH 2 or OH, converting any of said precursors into the corresponding dyestuffs, and drying the resulting aqueous solution or dispersion into a dry pulverulent product.
Claim 3
Dependent Claim 9 words
Process according to claim 1, wherein Z represents OH.
Claim 4
Dependent Claim 27 words
Process according to claim 1, wherein said dyestuffs or said precursors are mixed with compounds which, under the influence of acids or alkali, are split into R--Z.
Claim 5
Dependent Claim 33 words
Process according to claim 3, wherein R--Z is RO--A--O--X wherein R is C 10 -C 20 alkyl; A represents the radical of a polyfunctional, polybasic acid and X represents H or a cation.
Claim 6
Dependent Claim 44 words
Process according to claim 4, wherein A is --SO 2 --, --PO(OH)--, --PO(OR)--, --SO 2 --B--SO 2 --, --SO 2 --B--CO--, or --CO--B--CO, wherein B is a lower alkylene radical or arylene radical which is unsubstituted or substituted by carboxyl, ester or sulphonic acid.
Claim 7
Dependent Claim 72 words
Process according to claim 3, wherein R--Z is ##STR3## wherein R has the meaning indicated in claim 3; Y is O or NH, and V is --(CH 2 ) p --SO 3 X, --(CH 2 --CH 2 --O) q --H, or --CH 2 --CH 2 --N(CH 2 --CH 2 OH) 2 , p is an integer from 2-4, q is an integer greater than 3, and X is H or a cation.
Claim 8
Dependent Claim 6 words
Formulations obtained according to claim 1.

References Cited (Backward Citations)

US2828180A Cited
US2768054A Cited
US3390947A Cited
US3652198A Cited
US3925007A Cited
GB1368385A Cited
US3960486A Cited
US3977828A Cited
US4235597A Cited
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-10-19 1985-04-20 1985-10-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-10-19 1989-04-20 1989-10-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-10-19 1993-04-20 1993-10-20 $7700.00 Window Closed / Lapsed

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