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Dokumentenidentifikation EP0399198 07.07.1994
EP-Veröffentlichungsnummer 0399198
Titel Behandlung von Textilmaterial aus Wolle.
Anmelder BIP Chemicals Ltd., Manchester, GB
Erfinder Heywood, Derek Wallwork, Cheadle Hulme, Cheshire, GB;
Howarth, Stuart Belton, Cannock, Staffordshire WS11 1HJ, GB
Vertreter Deufel, P., Dipl.-Wirtsch.-Ing.Dr.rer.nat.; Hertel, W., Dipl.-Phys.; Rutetzki, A., Dipl.-Ing.Univ.; Rucker, E., Dipl.-Chem. Univ. Dr.rer.nat.; Huber, B., Dipl.-Biol. Dr.rer.nat.; Becker, E., Dr.rer.nat.; Steil, C., Dipl.-Ing.; Kurig, T., Dipl.-Phys., Pat.-Anwälte, 80331 München
DE-Aktenzeichen 69009293
Vertragsstaaten AT, BE, CH, DE, DK, ES, FR, GR, IT, LI, LU, NL, SE
Sprache des Dokument En
EP-Anmeldetag 11.04.1990
EP-Aktenzeichen 901070052
EP-Offenlegungsdatum 28.11.1990
EP date of grant 01.06.1994
Veröffentlichungstag im Patentblatt 07.07.1994
IPC-Hauptklasse D06M 15/572
IPC-Nebenklasse D06M 15/55   D06M 15/59   D06N 3/14   

Beschreibung[en]

This invention relates to the treatment of woollen textile material, which may be in the form of yarn or in other form, such as wool tops, woollen piece goods or woollen garments, and is concerned with treatment to reduce shrinkage and felting and improve resistance to abrasion.

For the purposes just referred to it is common to treat woollen textile material with an aqueous solution of the resin reaction product of epichlorhydrin with a polyamide whose repeating unit contains basic -NH- or -NH&sub2; groups, as distinct from the non-basic -NH- group of the amide linkage -NH.CO-. Such a resin is for example that obtained by the reaction of epichlorhydrin with the condensation product of diethylene triamine (H&sub2;NCH&sub2;CH&sub2;NHCH&sub2;CH&sub2;NH&sub2;) and adipic acid (HO&sub2;C(CH&sub2;)&sub4;CO&sub2;H).

We have now found that the reduction of shrinkage and felting, and the resistance to abrasion, of woollen textile material can be even further improved by depositing a polyurethane from aqueous dispersion onto woollen textile material already treated with a polyamide-epichlorhydrin resin. The deposition very probably occurs because the polyurethane is weakly anionic, whereas the previously deposited epichlorhyrdin resin is cationic.

The polyurethane is preferably a polyester-based aliphatic polyurethane containing salt-form acid groups, particularly carboxylate groups, eg -CO&sub2;Na or -CO&sub2;NH(C&sub2;H&sub5;)&sub3;. Aqueous dispersions of such polyurethanes are commercially available for the finishing of leather requiring outstanding resistance to abrasion.

Woollen textile material to be treated, especially when in the form of yarn, may comprise wool admixed with other (particularly synthetic) fibre, such as fibres of viscose, polyesters, and especially polyamides, such as nylon. Fabrics made up from such treated yarn, eg carpets, have very good resistance to abrasion.

The invention is further illustrated by the following Examples.

Example 1

Hanks of woollen yarn freshly withdrawn from the dyebath were immersed in an aqueous solution (2% solids by weight) obtained by diluting with water the cationic polyamide-epichlorhydrin resin solution sold under the name BEETLE BT 747, pH about 3 and solids content 12.5% by weight. (BEETLE is a registered trade mark).

The resin-exhausted liquid was drained from the treatment vessel, which was then filled with aqueous polyurethane dispersion to cover the woollen hanks, onto which about 2% of their weight of polyamide-epichlorhydrin resin had become deposited as a result of the previous treatment. The polyurethane dispersion employed was one containing 2% by weight of the product, pH about 8, commercially available under the name BEETLE BT 9010, containing 35% by weight of a polyester-based aliphatic polyurethane containing carboxylate groups in salt form at intervals along the polymer chain.

After standing for 2 minutes, the exhausted polyurethane dispersion was run off and the hanks were washed with water. Finally, the treated hanks were drained, and dried in air at about 130° C.

The above procedure can equally well be applied to hanks during (as distinct from after) the dyeing operation.

In the continuous treatment of yarn, the yarn is drawn first through a bath of the polyamide-epichlorhydrin resin, then through a bath of the polyurethane dispersion, and finally (after a water-rinse) through a drying unit.

Example 2

Hanks of carpet yarn, composed of wool (80% by weight) and nylon (20% by weight), freshly withdrawn from the dyebath were immersed in an aqueous solution (2% solids by weight) of cationic polyamide-epichlorhydrin resin solution as in the previous Example.

The resin-exhausted liquid was drained from the treatment vessel, which was then filled with aqueous polyurethane dispersion to cover the wool/nylon hanks, onto which about 2% of their weight of polyamide-epichlorhydrin resin had become deposited as a result of the previous treatment. The polyurethane dispersion employed was as in Example 1.

After standing for 2 minutes, the exhausted polyurethane dispersion was run off and the hanks were washed with water. The treated hanks were drained, dried in air at 130° C and then woven to form a carpet by entirely conventional means (a loop pile weaving machine). The carpet was conditioned for 24 hours in a standard atmosphere (65% ± 2% relative humidity at 20° ± 20° C), and then tested for abrasion-resistance in that atmosphere.

Results were: Rubs to end point Carpet woven from untreated 80:20 wool/nylon yarn 59,000 Carpet woven from the yarn treated as described 70,000


Anspruch[de]
  1. Verfahren zur Behandlung von Textilmaterial aus Wolle zur Verminderung des Schrumpfens und Filzens und zur Verbesserung der Beständigkeit gegen Abrieb durch Abscheidung eines Polyamid-Epichlorhydrinharzes darauf aus einem kationischen Bad, dadurch gekennzeichnet, daß danach ein Polyurethan auf das Material aus einer anionischen wäßrigen Polyurethandispersion abgeschieden wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Polyurethan ein aliphatisches Polyurethan auf Polyesterbasis ist, das Säuregruppen in Salzform enthält.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß diese Gruppen Carboxylatgruppen sind.
  4. Verfahren nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Wolltextilmaterial in Form von Garn vorliegt.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß das Garn aus Wolle in Mischung mit synthetischer Faser ist.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß die synthetische Faser ein Polyamid ist.
  7. Textilmaterial aus Wolle, hergestellt aus Garn, das gemäß irgendeinem der Ansprüche 1 bis 6 behandelt ist.
  8. Teppich, hergestellt aus Garn, das nach irgendeinem der Ansprüche 1 bis 6 behandelt ist.
Anspruch[en]
  1. A process for the treatment of woollen textile material to reduce shrinkage and felting and improve resistance to abrasion, by depositing a polyamide-epichlorhydrin resin thereon, from a cationic bath, characterised in that a polyurethane is subsequently deposited onto the material from an anionic aqueous-polyurethane dispersion.
  2. A process according to claim 1, in which the polyurethane is a polyester-based aliphatic polyurethane containing salt-form acid groups.
  3. A process according to claim 2, in which said groups are carboxylate groups.
  4. A process according to any of claims 1 - 3, in which the woollen textile material is in the form of yarn.
  5. A process according to claim 4, in which the yarn is of wool admixed with synthetic fibre.
  6. A process according to claim 5, in which the synthetic fibre is a polyamide.
  7. Woollen textile fabric made from yarn treated according to any of claims 1 - 6.
  8. Carpet made from yarn treated according to any of claims 1 - 6.
Anspruch[fr]
  1. Un procédé pour le traitement de matériau textile de laine pour réduire le rétrécissement et le feutrage et pour améliorer la résistance au frottement, en y déposant dessus une résine de polyamide - épichlorhydrine, à partir d'un bain cationique, caractérisé par le fait qu'un polyuréthane est par la suite déposé sur le matériau à partir d'une dispersion anionique de polyuréthane aqueux.
  2. Un procédé selon la revendication 1, où le polyuréthane est un polyuréthane aliphatique à base de polyester contenant des groupes sursels.
  3. Un procédé selon la revendication 2, où les dits groupes sont des groupes carboxylates.
  4. Un procédé selon une quelconque des revendications 1 - 3, où le matériau textile de laine est sous la forme de fil.
  5. Un procédé selon la revendication 4, où le fil est de la laine incorporée à de la fibre synthétique.
  6. Un procédé selon la revendication 5, où la fibre synthétique est un polyamide.
  7. Tissu de textile de laine fabriqué avec du fil traité selon une quelconque des revendications 1 - 6.
  8. Tapis fabriqué avec du fil traité selon une quelconque des revendications 1 - 6.






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

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