DE2042258A1 - Keratin fibres esp wool - set by impregnation with methylol sulphonic acid salt solns and wetting agent - Google Patents

Abstract

The fibre is impregnated with a soln. of an HOCH2SO3H salt under addn. of a wetting agent and set to desired shape or crease formation under applied pressure at raised temp. Pref. treatment bath contains 30 - 90 g/l, esp. 60 g/l, of 35 - 40% aq. soln. of e.g. HOCH2SO3Na, and 0.5 - 3 g/l wetting agent.

Description

Process for equipping and fixing keratin-containing materials to retain their shape Fiber material Wetatin-containing fiber material, in particular wool, is available in a wide variety of ways Fixed in a way, i.e. brought into a dimensionally stable state. Older procedures work z.ß. with sodium bisulfite or pyrosulfite, which is the very large one Disadvantage? that in the usual processes of textile finishing sulfur dioxide escapes, so that a considerable odor nuisance arises-> itt. Also can Bisulfite is oxidized to bisulfate, an undesirable and often disturbing phenomenon.

When working with sulphides, there are also unpleasant odors. Formaldehyde sulfoxylate, mercaptan compounds such as thioglycolic acid, Thioglycerin, etc. can be used. Since such compounds, however, reactions enter with metal salts, they are rarely used in practice.

The International Wool Secretariat (IWS) recommends such Carry out fixations with monoethanolamine sulfite. This procedure will though often used because it is a prerequisite for using the Wollsiefrel; it has however, the great disadvantage that monoethanolamine sulfite on the textile machines used has a very strong corrosive effect and e.g. attacks the rubber blanket of the Konticrab and destroyed.

It has now been found that all of these disadvantages can be avoided if to fix keratin-containing fiber material salts of i'tethylolsulfonsäure can be used together with a wetting agent. Aqueous solutions of the above Salts are completely odorless, do not damage the keratin fibers, affect them These fibers are not colored, do not tend to promote corrosion and therefore form also no parb complexes with heavy metals, such as

thioglycolic acid. The wetting agent becomes better and faster Added wetting of the goods. Anionic, non-ionic ones are used for this and amphoteric wetting agents. E.g. it is trademarked "Nekal BX", a sodium salt of diisobutylnaphthalene sulfonic acid and good as a wetting agent suitable.

The preparation of the salts of methylolsulfonic acid is simple. she takes place by mixing aqueous solutions of equimolecular solutions of bisulfites (e.g. sodium bisulfite) and formaldehyde.

The mechanism by which keratinous fiber material is fixed is well known. Reduction becomes the disulfide bridge of the cystine component split in the keratin: Rl-CH2-S-S-CH2-R2 + H2 - R1-CH2-SH + R2-OH2SH with sulphurous Acid, sulfites and bisulfites result in the following reaction: R1-CH2-S-S-CH2-R2 + H2S °) R1-CH2-SH + R2-CF -5-SO 3H In a corresponding way, the reaction can be carried out with the salts of methylolsulfonic acid: R1-CH2-S-S-CH2-R2 + HOCH2SO3NA - R1-CH2-S-CH2OH + R2-CH2-S-SO3Na In all cases the disulfia bridge is formed by oxidation wloder receded, whereby the fiber through the formation of these cross bridges is fixed in its new shape (folds) (pleated blinds, etc.).

The treatment of the keratin-containing fiber material for fi :: ation takes place in such a way that the fiber material Lit a liquor which is about 30 to 90 g / l, preferably OD g / l of a 35-40% aqueous solution, e.g.

methylolsulfonic acid sodium and approx. 0.5 - 3.0 g / l, to be added 1.5 g / l of a suitable wetting agent contains, soaks, to about 60-100% liquor pick-up squeezed and then with steam or by ironing, pressing, etc.

fixed.

zinc variant with the possibility of fixation results from this, that the fiber material is dried at temperatures below 100 ° C after impregnation can be and only after processing after moistening by ironing or steaming is fixed. Furthermore, the aqueous solution of the salt of methylolsulfonic acid, together with the wetting agent, also applied by spraying and then applied Ironing, e.g. with a household iron.

The following examples are intended to illustrate the application and benefits of the Illustrate the method, but without thereby the breadth of application in any Restrict form.

Example 1 A wool gabardine - 100% wool - is washed after washing of the oil on a burning stand (fixing machine) with 50 g / l of the above approx 35% solution of metaylolsulfonic acid with the addition of Q, 7 g / l of one under the protected name "Nekal BX" known wetting agent, during 20 Min. Fixed at 90-9500, then drawn off with cold water and at 1000C dried. The piece comes with non-fixed pieces or only with water on the Brennbock treated pieces in a reel vat (liquor 1: 4o) with metal complex dyes Dyed at the boil for 3 hours at pH 6-7, then drained and dried. The pre-fixed piece does not show any, but the customary pre-treated pieces significant cooking lines. The piece fixed with the agent according to the invention was Equal to the other pieces in terms of color depth and equality.

Example 2 A wool knitted fabric is made of the above on a 50 g padder mentioned about 35% own solution of methylolsulfonsaurem sodium with the addition of 0.5 g / l nonionic wetting agent impregnated and squeezed off to approx. 90% liquor pick-up.

The knitted fabric is then dried at 1000C and then at 100 - 11000 fixed for 3 minutes on a conventional detaching machine. The on this Goods that have been fixed in this way show shrinkage values between 2 and 4% when washed on delicates (35 ° C) compared to the non-fixed goods from 8 - 12/0.

The fixed goods dries more smoothly than the unfixed goods. An impairment of the dyeing produced with acidic wool dyes the fixative does not occur.

Example 3 in wool fresco (10 0% wool) is made with a solution of 1 g / l anion-active wetting agent (based on succinic acid ester) and 60 g / 2 of the inventive sprayed about 35% solution of sodium methylolsulfonsaurem, so that a liquor pick-up of about 40 G% 3 arises. Then the tissue laid in the old one is 1100C steamed under pressure.

b- arise wrinkles against mechanical influences, as well as against prolonged (12 hours) immersion in aqueous media are resistant. Analog folds, where only with water - i.e. without the addition of the wetting and fixing agent - sprayed are significantly less permanent. A review of the wet crease angles showed that in the case of the fixed goods, higher values could be demonstrated.

Example 4 in wool gabardine - yarn-dyed - is after washing by a solution containing 50 g / l of the 35% solution of nethylolsulfonsaurem Sodium and 1.5 g / l of a nonionic wetting agent, passed through, squeezed off and on a continuous fixer machine, consisting of a stainless steel cylinder and an endless rubber blanket, fixed. The fabric has an improved dimensional stability against steaming and washing, as well as against emitters. Neither the blanket nor the stainless steel cylinders are - even with longer work - with the inventive Solution attacked.

Claims (3)

P a t e n t a n s check 1. Process for equipping and fixing keratin-containing materials to retain their shape Fiber material, characterized in that the keratin-containing fiber material with a solution of a salt of methylolsulfonic acid with the addition of a wetting agent soaked and with the desired shape or folds under pressure is fixed at an elevated temperature. 2. The method according to claim 1, characterized in that the concentration the treatment liquor 30-90 g / l of an aqueous solution of a salt of methylolsulfonic acid and 0.5-3.0 g / l of a wetting agent. 3. The method according to claim 1 and 2, characterized in that the keratin-containing fiber material after impregnation at temperatures below 100 ° C dried, assembled and only then fixed accordingly after moistening.