EP0441421B1 - Traitement de la laine - Google Patents

Traitement de la laine Download PDF

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Publication number
EP0441421B1
EP0441421B1 EP91200072A EP91200072A EP0441421B1 EP 0441421 B1 EP0441421 B1 EP 0441421B1 EP 91200072 A EP91200072 A EP 91200072A EP 91200072 A EP91200072 A EP 91200072A EP 0441421 B1 EP0441421 B1 EP 0441421B1
Authority
EP
European Patent Office
Prior art keywords
treatment
wool
process according
resin
silicone polymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91200072A
Other languages
German (de)
English (en)
Other versions
EP0441421A1 (fr
Inventor
Derek Wallwork Heywood
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bip Chemicals Ltd
Original Assignee
Bip Chemicals Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bip Chemicals Ltd filed Critical Bip Chemicals Ltd
Publication of EP0441421A1 publication Critical patent/EP0441421A1/fr
Application granted granted Critical
Publication of EP0441421B1 publication Critical patent/EP0441421B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/39—Aldehyde resins; Ketone resins; Polyacetals
    • D06M15/423—Amino-aldehyde resins
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain

Definitions

  • This invention relates to the treatment of wool, and is particularly concerned with a process for improving its resistance to shrinkage.
  • a process very widely used for this purpose entails subjecting the wool to an oxidation treatment, usually a chlorination, as with free chlorine or a hypochlorite or dichloroisocyanurate salt; removing unreacted (and potentially very damaging) oxidising agent from the wool fibres, as by passage through a reducing medium such as sodium sulphite solution, followed by a water rinse; and then treating the wool with a synthetic resin to impart a resistance to shrinkage which supplements that given by the oxidation treatment.
  • an oxidation treatment usually a chlorination, as with free chlorine or a hypochlorite or dichloroisocyanurate salt
  • removing unreacted (and potentially very damaging) oxidising agent from the wool fibres as by passage through a reducing medium such as sodium sulphite solution, followed by a water rinse
  • a synthetic resin to impart a resistance to shrinkage which supplements that given by the oxidation treatment.
  • the wool is treated with a softening agent to soften the harsh handle which it would otherwise have as a result of the resin treatment; and in due course the treated wool is dried evenly at a moderate raised temperature to ensure that adequate curing of the resin has taken place.
  • the process just outlined can be applied to the treatment of wool tops (ie wool fibre before it is spun) as well as to the treatment of yarn and of woollen piece goods and garments.
  • the resins most used in the process are those obtained by reaction of epichlorhydrin (a compound having a reactive epoxy group attached to the radical -CH2C1) with a polyamide whose repeating unit contains basic -NH- or -NH2 groups, as distinct from the non-basic -NH- groups of the amide linkage -CO.NH-.
  • a resin is for example that obtained by the reaction of epichlorhydrin with the condensation product of a polyalkylene amine, eg diethylene triamine (H2NCH2CH2NHCH2CH2NH2) and adipic acid (HO2C.CH2CH2CH2CH2CO2H).
  • a treated wool product can be obtained with properties just as good as those that result when an epichlorhydrin resin is employed, by using a colloidal melamine resin as the resin to impart resistance to shrinkage.
  • Colloidal melamine resins are used in the treatment of paper to improve its wet strength, and are obtained by dissolving a partially condensed melamine formaldehyde resin in an acid such as hydrochloric, formic, acetic or lactic acid under controlled conditions, and further diluting with water. The solution becomes infinitely miscible with water, and on ageing develops a bluish haze. The solution contains positively charged colloidal particles of the melamine resin.
  • Such resins have also been used, in conjunction with a non-ionic silicone elastomer, in the treatment of silk, to improve crease resistance and stability to washing, as disclosed in GB-A-2217741-A.
  • a process for the treatment of wool to improve its resistance to shrinkage by subjecting it first to an oxidation treatment and then to a colloidal melamine resin treatment to supplement the shrink resistance imparted by the oxidation treatment, the resin treatment being accompanied or followed by treatment with a softening agent to soften the harsh handle associated with use of the resin, in which process the softening agent employed is a silicone polymer.
  • the silicone polymer is dispersed in the colloidal melamine resin,ie in the aqueous phase which constitutes the dispersion medium of that system.
  • EP-A-80272 is not, however, concerned to avoid effluent problems arising from the presence of -CH2Cl or like groups in the resin conventionally used for wool treatment; nor does it mention the use of a silicone polymer as softening agent, a use which we have found has the advantage over polyethylene softeners of producing in the wool better stabilisation against shrinkage and better non-felting properties during washing.
  • the silicone polymer employed as softening agent may be cationic, but is preferably non-ionic. In general the silicone polymer used shows no chemical reactivity towards the colloidal melamine resin.
  • An acidic melamine resin solution was produced by mixing the following ingredients in the following proportions by weight.
  • the mixture was allowed to stand for 2 hours to develop colloidal properties, and was then diluted with an equal volume of water to give a colloidal melamine resin having a shelf life of more than 6 months.
  • the diluted composition (1 part by weight) was further diluted with water (4 parts) and to this mixture was added an aqueous emulsion of a non-ionic polydimethylsiloxane (0.5 parts by weight; silicone content 35% by weight).
  • a non-ionic polydimethylsiloxane 0.5 parts by weight; silicone content 35% by weight.
  • BC330 silicone release agent sold by Basildon Chemicals under the designation BC330 is very suitable.
  • the mixed melamine resin/silicone polymer composition was then applied, from a bath adjusted with acetic acid to pH 5-6, to knitted wool garments which had been conventionally chlorinated with a dichloroisocyanurate salt, treated with antichlor, and rinsed.
  • the bath temperature was slowly raised from ambient to 40° C during 10 minutes, and held at that temperature for a further 10 minutes to exhaust the melamine resin and silicone polymer onto the wool. Weight gain was about 1.5% by dry weight of the wool.
  • the material was then removed from the bath, hydroextracted and tumble-dried at 60-80° C.
  • Example 1 For the treatment of wool tops the procedure of Example 1 was modified as follows.
  • the mixed melamine resin/silicone polymer was applied in the 4th bowl of a conventional 5-bowl unit to deposit about 1.5% of solid mixture onto the tops.
  • the treated tops were then passed to the 5th bowl, in which a cationic substituted stearamide had been included as additional softener.
  • the tops were finally dried at 70-80° C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Claims (9)

  1. Un procédé de traitement de la laine pour améliorer sa résistance au rétrécissement, en lui faisant subir d'abord un traitement d'oxydation et ensuite un traitement par une résine de mélamine colloïdale pour augmenter la résistance au rétrécissement conférée par le traitement d'oxydation, le traitement par la résine étant accompagné ou suivi de traitement par un agent d'adoucissage pour adoucir le toucher rêche associé à l'utilisation de la résine, caractérisé en ce que l'agent d'adoucissage est un polymère de silicone.
  2. Un procédé selon la revendication 1, dans lequel le polymère de silicone est dispersé dans la résine de mélamine colloïdale.
  3. Un procédé selon la revendication 1 ou 2, dans lequel le polymère de silicone est non ionique.
  4. Un procédé selon la revendication 3, dans lequel le polymère de silicone est un polydiméthylsiloxane.
  5. Un procédé selon l'une quelconque des revendications 1 à 4, dans lequel la résine de mélamine a au moins deux groupements -CH₂OR par noyau de mélamine, où R = H ou un groupement alkyle en C₁₋₄
  6. Un procédé selon l'une quelconque des revendications 1 à 5, dans lequel le traitement d'oxydation est une chloration.
  7. Un procédé selon la revendication 6, dans lequel la chloration utilise un sel de dichloroisocyanurate.
  8. Un procédé selon l'une quelconque des revendications 1 à 7, appliqué au traitement de voiles de laine.
  9. Un procédé selon l'une quelconque des revendications 1 à 7, appliqué au traitement de vêtements en laine tricotés.
EP91200072A 1990-02-07 1991-01-16 Traitement de la laine Expired - Lifetime EP0441421B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909002680A GB9002680D0 (en) 1990-02-07 1990-02-07 Treatment of wool
GB9002680 1990-02-07

Publications (2)

Publication Number Publication Date
EP0441421A1 EP0441421A1 (fr) 1991-08-14
EP0441421B1 true EP0441421B1 (fr) 1995-04-05

Family

ID=10670536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91200072A Expired - Lifetime EP0441421B1 (fr) 1990-02-07 1991-01-16 Traitement de la laine

Country Status (6)

Country Link
EP (1) EP0441421B1 (fr)
AU (1) AU630275B2 (fr)
DE (1) DE69108588T2 (fr)
GB (2) GB9002680D0 (fr)
NZ (1) NZ237014A (fr)
ZA (1) ZA91605B (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0080272A3 (fr) * 1981-10-28 1984-08-22 South African Inventions Development Corporation Traitement anti-rétrécissant de la laine
GB2217741B (en) * 1988-04-21 1991-07-31 Bip Chemicals Ltd Treatment of silk fabrics

Also Published As

Publication number Publication date
GB9002680D0 (en) 1990-04-04
GB2240790B (en) 1993-06-02
GB2240790A (en) 1991-08-14
DE69108588D1 (de) 1995-05-11
DE69108588T2 (de) 1995-10-05
EP0441421A1 (fr) 1991-08-14
AU630275B2 (en) 1992-10-22
ZA91605B (en) 1991-10-30
GB9101054D0 (en) 1991-02-27
AU7086691A (en) 1991-08-08
NZ237014A (en) 1992-09-25

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