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US4097444A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for the dyeing of water-insoluble thermoplastic polymers and polycondensates in the mass

Assignee: Hoechst AG
•
Filing: 1977-02-28
•
Granted: 1978-06-27
•
Expires: 1997-02-28
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Abstract

Abstract Process for the dyeing of a water-insoluble thermoplastic polymer or polycondensate in mass, which comprises adding to the said thermoplastic material before the final molding thereof, an azlactone dyestuff of the formula (1) ##STR1## in which A and B each represents phenyl, lower alkyl-phenyl, lower alkoxy-phenyl, chlorophenyl, nitrophenyl, cyanophenyl, ##STR2## METHYLENE-DIOXY-PHENYLENE OR NAPHTHYL, A and B being identical or different, D represents phenylene, lower alkyl-phenylene, di-lower alkoxy-phenylene, monochlorophenylene, dichlorophenylene, biphenylene or naphthylene, and n represents the integer 0 or 1, or a mixture of dyestuffs of the said formula (1), the dyeings so obtained representing brilliant yellow dyeings of high tinctorial strength being distinguished by very good fastness to light, rubbing and ironing, and, particularly, by an outstanding stability toward heat.

Inventors

  • 👤 Wolfgang Teige
  • 👤 Rudolf Schickfluss

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 03:20
CPC Classifications
C; C09; C09B; C09B57/00; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/35; C09B23/00; C09B23/0075; C09B23/02; C09B23/06

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 92 words
Process for the dyeing of a water-insoluble thermoplastic polymer or polycondensate in mass, which comprises adding to the said thermoplastic material before the final molding thereof with an azlactone dyestuff of the formula (1) ##STR14## in which A and B each represents phenyl, lower alkylphenyl, lower alkoxy-phenyl, chlorophenyl, nitrophenyl, cyanophenyl, ##STR15## methylene-dioxy-phenylene or naphthyl, A and B being identical or different, E represents phenylene, lower alkyl-phenylene, di-lower alkoxy-phenylene, monochlorophenylene, dichlorophenylene, biphenylene or naphthylene, and n represents the integer 0 to 1, or with a mixture of dyestuffs of the said formula (1).
Claim 2
Dependent Claim 92 words
Process for the dyeing of a water-insoluble thermoplastic polymer or polycondensate in mass, which comprises adding to the said thermoplastic material before the final molding thereof with an azlactone dyestuff of the formula (1) ##STR14## in which A and B each represents phenyl, lower alkylphenyl, lower alkoxy-phenyl, chlorophenyl, nitrophenyl, cyanophenyl, ##STR15## methylene-dioxy-phenylene or naphthyl, A and B being identical or different, E represents phenylene, lower alkyl-phenylene, di-lower alkoxy-phenylene, monochlorophenylene, dichlorophenylene, biphenylene or naphthylene, and n represents the integer 0 to 1, or with a mixture of dyestuffs of the said formula (1).
Claim 3
Dependent Claim 29 words
The process as claimed in claim 1, wherein the dyestuffs of the said formula (1) are added to the starting materials used for the condensation reaction before the condensation.
Claim 4
Dependent Claim 29 words
The process as claimed in claim 1, wherein the dyestuffs of the said formula (1) are added to bis-(β-hydroxyethyl)-terephthalate as starting material for the condensation reaction to yield polyethyleneterephthalate.
Claim 5
Dependent Claim 33 words
The process as claimed in claim 1, wherein the said dyestuffs are applied to a ready-made polymer of polycondensate which is subsequently subjected to a melting process to attain final mixing and molding.
Claim 6
Dependent Claim 19 words
The process as claimed in claim 1, wherein polystyrene, polyamide, polymethacrylate or polyvinylchloride is dyed as a thermoplastic polymer.
Claim 7
Dependent Claim 15 words
The process as claimed in claim 1, wherein polyethyleneterephthalate is dyed as a thermoplastic polycondensate.

References Cited (Backward Citations)

US2571319A Cited
US3489713A Cited
US3793341A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-06-26 1981-12-26 1982-06-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-06-26 1985-12-26 1986-06-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-06-26 1989-12-26 1990-06-27 $7700.00 Window Closed / Lapsed

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