Producing spinnable and dyeable polyester fibers
AssigneeBASF SE
InventorsPia Baum, Klaus Scheuermann
Life of this patent
Estimating the term…
Abstract
The present invention relates to a process for producing dyed polyester fibers (C) from a terephthalate polyester (A), at least one polyester-containing additive (B) and optionally at least one component (G). The polyester-containing additive is obtainable by condensation of the monomers of an aliphatic 1,ω-diol, of an aliphatic 1,ω-dicarboxylic acid and of an aromatic 1,ω-dicarboxylic acid. Optionally, chain extenders (V) are also used in the production of the polyester-containing additive (B). For fiber production, the components (A), (B) and optionally (G) are mixed, melted in an extruder and extruded through spinneret dies. These polyester fibers (C) are preferably used in the production of dyed textile fabrics (F).
Claims17
A process for producing dyed polyester fibers (C), dyed yarn (E) and/or dyed textile fabric (F) from the components
- a) 80% to 99% by weight, based on the sum total of all the constituents of the fibers, of at least one terephthalate polyester (A),
- b) 1% to 20% by weight, based on the sum total of all the constituents of the fibers, of at least one polyester-containing additive (B) obtainable from the monomers m
- m1) aliphatic 1,ω-diol,
- m2) aliphatic 1,ω-dicarboxylic acid,
- m3) aromatic 1,ω-dicarboxylic acid, and
- at least one chain extender (V) selected from the group consisting of tartaric acid, citric acid, malic acid, trimethylolpropane, trimethylolethane, pentaerythritol, polyether triols, glycerol, trimesic acid, trimellitic acid, trimellitic anhydride, pyromellitic acid, pyromellitic dianhydride, hydroxyisophthalic acid and 1,6-hexamethylene diisocyanate,
- wherein the glass transition temperature of the polyester-containing additive (B) is between 40° C. and −20° C. and
- c) optionally at least one component (G)
- comprising the steps of
- I) mixing the components (A), (B) and, if used, one or more components (G),
- II) producing polyester fibers (C) from the mixture obtained in step I),
- III) optionally further processing the polyester fibers (C) into yarn (E) and/or textile fabric (F), and
- IV) dyeing the polyester fibers (C), the yarn (E) and/or the textile fabric (F) at a temperature of <130° C.,
- wherein the at least one terephthalate polyester (A) is a polyethylene terephthalate and wherein the aliphatic 1,ω-diol (m1) is 1,4-butandiole and the aliphatic 1,ω-dicarboxylic acid (m2) is adipic acid and the aromatic 1,ω-dicarboxylic acid (m3) is terephthalate acid and
- wherein the at least one component (G) is selected from the group consisting of processing assistants, additives, UV stabilizers, photostabilizers, thermal stabilizers, dyes, pigments, flame retardants, antioxidants, plasticizers, metal oxides, optical brighteners and fillers.
A process for producing dyed polyester fibers (C), dyed yarn (E) and/or dyed textile fabric (F) from the components
- a) 80% to 99% by weight, based on the sum total of all the constituents of the fibers, of at least one terephthalate polyester (A), wherein the terephthalate polyester (A) is a polyethylene terephthalate,
- b) 1% to 20% by weight, based on the sum total of all the constituents of the fibers, of at least one polyester-containing additive (B) obtainable from the monomers m
- m1) aliphatic 1, ω-diol, which is 1,4-butanediol,
- m2) aliphatic 1, ω-dicarboxylic acid, which is adipic acid,
- m3) aromatic 1, ω-dicarboxylic acid which is terephthalic acid, and
- at least one chain extender (V) selected from the group consisting of tartaric acid, citric acid, malic acid, trimethylolpropane, trimethylolethane, pentaerythritol, polyether triols, glycerol, trimesic acid, trimellitic acid, trimellitic anhydride, pyromellitic acid, pyromellitic dianhydride, hydroxyisophthalic acid and 1,6-hexamethylene diisocyanate,
- wherein the glass transition temperature of the polyester-containing additive (B) is between −40° C. and −20° C., and
- c) optionally at least one component (G)
- comprising the steps of
- I) mixing the components (A), (B) and, if used, one or more components (G),
- II) producing polyester fibers (C) from the mixture obtained in step I),
- III) optionally further processing the polyester fibers (C) into yarn (E) and/or textile fabric (F), and
- IV) dyeing the polyester fibers (C), the yarn (E) and/or the textile fabric (F) at a temperature of <130° C.,
- wherein the at least one component (G) is elected form the group consisting of processing assistants, additives, UV stabilizers, photostabilizers, thermal stabilizers, dyes and pigments, flame retardants, antioxidants, plasticizers, metal oxides, optical brighteners and fillers,
- wherein the dye in step IV) is elected from the group consisting of azo dyes, anthraquinone dyes, quinophthalone dyes, naphthalimide dyes, napthoquinone dyes, nitro dyes and mixtures thereof.
Dependencies are inferred from the claim text.