Process for producing dyed mixed fibres, dyed mixed fibre yarns and/or dyed mixed fibre textile fabrics

Patent metadata

Field	Value
Publication number	US-11913168-B2
Application number	US-202017761606-A
Country	US
Kind code	B2
Filing date	Sep 17, 2020
Priority date	Sep 20, 2019
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

The present invention relates to a process for producing dyed mixed fibres (D-MF), dyed mixed fibre yarns (D-MY) and/or dyed mixed fibre textile fabrics (D-MT) in which mixed fibres (MF), mixed fibre yarns (MY) and/or mixed fibre textile fabrics (MT) comprising at least one polyester fibre (PF) and at least one further fibre (FF) are simultaneously contacted with at least two different dyes (D1) and (D2) at a temperature TD<130° C. The at least one polyester fibre (PF) comprises 80 to 99.5% by weight of at least one terephthalate polyester (A), 0.5 to 20% by weight of at least one aliphatic-aromatic polyester (B) and 0 to 5% by weight of at least one additive (C), wherein the % by weight are based in each case on the total weight of components (A), (B) and optionally (C). Moreover, the present invention relates to the dyed mixed fibres (D-MF), the dyed mixed fibre yarns (D-MY) and/or the dyed mixed fibre textile fabrics (D-MT) obtained by this process.

First claim

The invention claimed is:

1. A process for producing dyed mixed fibers (D-MF), dyed mixed fiber yarns (D-MY) and/or dyed mixed fiber textile fabrics (D-MT) comprising the following steps a) to d)
a) providing at least one polyester fiber (PF) comprising 80 to 99.5% by weight of at least one terephthalate polyester (A), 0.5 to 20% by weight of at least one aliphatic-aromatic polyester (B) obtained by polymerization of at least the following monomers:
(m1) at least one aliphatic 1,ω-diol,
(m2) at least one aliphatic 1,ω-dicarboxylic acid compound and
(m3) at least one aromatic 1,ω-dicarboxylic acid compound, and
0 to 5% by weight of at least one additive (C),
wherein the % by weight are based in each case on the total weight of components (A), (B) and optionally (C),

b) providing at least one further fiber (FF) different from the at least one polyester fiber (PF),
c) processing the at least one polyester fiber (PF) and the at least one further fiber (FF) to obtain mixed fibers (MF), mixed fiber yarns (MY) and/or mixed fiber textile fabrics (MT), wherein the mixed fibers (MF), the mixed fiber yarns (MY) and the mixed fiber textile fabrics (MT) comprise the at least one polyester fiber (PF) and the at least one further fiber (FF), and
d) contacting the mixed fibers (MF), the mixed fiber yarns (MY) and/or the mixed fiber textile fabrics (MT) simultaneously with at least two different dyes (D1) and (D2) at a temperature TD D <130° C. to obtain dyed mixed fibers (D-MF), dyed mixed fiber yarns (D-MY) and/or dyed mixed fiber textile fabrics (D-MT).

2. The process according to claim 1 , wherein the at least two different dyes (D1) and (D2) are selected from anionic, cationic, vat and disperse dyes.

3. The process according to claim 1 , wherein the at least one terephthalate polyester (A) is at least one polyester selected from the group consisting of polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT) and polybutylene terephthalate (PBT).

4. The process according to claim 1 , wherein the at least one aliphatic 1,ω-diol (m1) is butane-1,4-diol.

5. The process according to claim 1 , wherein the at least one aliphatic 1,ω-dicarboxylic acid compound (m2) is selected from the group consisting of succinic acid, adipic acid and sebacic acid.

6. The process according to claim 1 , wherein the at least one aromatic 1,ω-dicarboxylic acid compound (m3) is terephthalic acid or dimethyl terephthalate.

7. The process according to claim 1 , wherein the at least one further fiber (FF) is selected from the group consisting of polyamide fibers, cotton fibers, wool fibers and viscose fibers.

8. The process according to claim 7 , wherein the viscose fibers, cotton fibers and wool fibers are staple fibers.

9. The process according to claim 1 , wherein in step a) 1 to 99% by weight of the at least one polyester fiber (PF) and in step b) 1 to 99% by weight of the at least one further fiber (FF) are provided, based in each case on the total weight of the at least one polyester fiber (PF) and the at least one further fiber (FF).

10. The process according to claim 1 , wherein the mixed fibers (MF), the mixed fiber yarns (MY) and/or the mixed fiber textile fabrics (MT) are simultaneously contacted with the at least two different dyes (D1) and (D2) at a temperature TD D <110° C.

11. The process according to claim 1 , wherein the mixed fibers (MF), the mixed fiber yarns (MY) and/or the mixed fiber textile fabrics (MT) are simultaneously contacted with the at least two different dyes (D1) and (D2) at a temperature TD D <100° C.

12. The process according to claim 1 , wherein the dye (D1) dyes the at least one polyester fiber (PF) and the dye (D2) dyes the at least one further fiber (FF) in the dyed mixed fibers (D-MF), the dyed mixed fiber yarns (D-MY) and/or the dyed mixed fiber textile fabrics (D-MT).

13. The process according to claim 1 , wherein component (C) is selected from the group consisting of lubricants, nucleating agents, compatibilizers, flame retardants, reinforcing agents, plasticizers, antioxidants, UV stabilizers, mineral fillers and pigments.

14. The process according to claim 1 , wherein the simultaneous contacting of the mixed fibers (MF), the mixed fiber yarns (MY) and/or the mixed fiber textile fabrics (MT) with the at least two different dyes (D1) and (D2) is carried out by immersing the mixed fibers (MF), the mixed fiber yarns (MY) and/or the mixed fiber textile fabrics (MT) at least once into a bath and wherein the bath comprises water and the at least two different dyes (D1) and (D2).

15. Dyed mixed fibers (D-MF), dyed mixed fiber yarns (D-MY) and/or dyed mixed fiber textile fabrics (D-MT) obtained by a process according to claim 1 .

Assignees

• Basf Se

Inventors

• Habraken Gijsbrecht Jacobus Maria
• Scheuermann Klaus
• Loeffler Achim

Classifications

• D06P1/16 Primary

  using dispersed, e.g. acetate, dyestuffs · CPC title

• D01F1/10

  Other agents for modifying properties · CPC title

• D01F6/92

  of polyesters · CPC title

• D06P3/143

  using dispersed dyes · CPC title

• D06P3/54

  using dispersed dyestuffs · CPC title