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
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
  • C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
  • C08L61/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
  • C08L61/24—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with urea or thiourea
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2369—Coating or impregnation improves elasticity, bendability, resiliency, flexibility, or shape retention of the fabric
  • Y10T442/2393—Coating or impregnation provides crease-resistance or wash and wear characteristics

Definitions

• This invention relates to improvements in the treatment of fabrics or other textile materials of the kind known to be susceptible to treatment for the production of crease-resisting products by the aid of resinous condensation-products, hereafter termed resins for brevity.
• the objects of the invention are to provide improved processes of preparing the impregnating agents, and improved processes of eflecting the impregnation, and finalcondensation. Other objects will appear later.
• the scope of the invention is defined in the appended claims.
• the textile material is impregnated with a containing a potentially acid substance.
• ammonium ethyl sulphate ammonium oleyl sulphate or sulphonate
• compounds of similar bases such as monomethylamine, dimethyla-mine, the ethanolamines, the hydrazines, the cyclohexylamines, etc.
• the amino type of compounds appear to liberate acid by reaction between the salt compound and the methylol compounds of the urea-like substances and/or free formaldehyde which may be present or produced.
• the invention also includes broadly a process of producing crease-resisting textile materials in which final heating to insolubilize the resinous material is eilected by direct contact with steam.
• the viscosity should-be about 3 to 5 centlpoises.
• condensates consist mainly of monomethylol and/or dimethylol urea.
• free acid and particularly strong acid causes precipitation of a further condensation product, whereas if the acid is replaced by the corresponding ammonium salt a relatively stabilizing effect is obtained.
• the potentially acid substance appears to liberate acid during the drying process and/or heating process. It is thus possible to add such quantities of the potentially acid substance as will, on heating, liberate larger quantities of acid than could be added as such-to the solution, or alternatively to use a salt of a stronger acid than could be added as such to the solution.
• the final heating necessary to insolubillze the resin can thus be completed in a shorter time or at a lower temperature than when using free acid in the smaller quantities which cannot be exceeded since otherwise the solution would be unstable.
• the condensation of the resinous material should be allowed to proceed to a certain extent before impregnation, otherwise undue loss of formaldehyde will occur during drying, which loss is undesirable technically and economically.
• the, quantity of the potentially acid substance is preferably suflicient to cause insolubilization of the greater part of the resinous material under the chosen conditions of final heating.
• solutions at 60 to 90% concentration mentioned above instead of being allowed to stand in the cold may be raised to say IO--80 C. and then cooled immediately. 7
• the heated fabric is washed in 0.5% warm soap solution for 5 minutes, well rinsed with water and dried in the usual manner.
• the crystalline product from the neutral reaction mixture gives a dimethylol urea of high solubility which is important since wecan prepare powders suitable for use in making solutions for impregnation.
• the material may be washed or finished according to desired known methods, either mechanical or chemical, e. g. the product may be treated with swelling agents or with substances which react with either or both the cellulose and condensation product.
• the mixture is then diluted to 50 to 60% and a suitable catalyst added, he. 1.5% tartaric acid or from 2 to 3% ammonium dihydrogen phosphate 'or ammonium tartrate, calculated on the concentrated mixture.
• a suitable catalyst added, he. 1.5% tartaric acid or from 2 to 3% ammonium dihydrogen phosphate 'or ammonium tartrate, calculated on the concentrated mixture.
• the cloth is impregnated, squeezed and thoroughly dried ata temperature preferably not exceeding 110 0., until, in the case of potentially acid substances, the necessary acidity which we prefer to be pH 4.5 has developed.
• the goods are then heated for 2 minutes at 170 C. in the case .of tartrate and either 1- min. at.
• the heating may be accomplished by passing the material through a chamber containing steam under similar conditionsof time and temperature. After heating, the goods are washed. dried and finished according to known means.
• Cotton goods may also be treated in the above manner but with less advantage than in the case of rayon, both as' filament and as staple fibre. This treatment is applicable broadly e. g. when using substances such as tartaric acid instead of potentially acid substances.
• Example 4 commenced to separate. Further cooling of the liquor produced a total yield of of monomethylol urea of melting point C.
• Process of improving the crease-resistance of textile fabrics which comprises impregnating the fabric with a solution of a reaction product of urea and formaldehyde consisting mainly of a methylol urea and containing a potentially acid ammonium salt and then heating the impregnated fabric to insolubilize the resin.
• Process of improving the crease-resistance of textile materials which consists in impregnating the material with a solution of a partial condensate of urea and formaldehyde containing an ammonium salt in quantity from 1 to 15 per cent of the amount of urea, and heating the impregnated material to insolubilize the resin and produce a crease-resisting product.
• Patent dated July 27, 1937. Disclaimer filed Nov. 25, 1946, by the assignee, Tootal Broadhurst Lee Oompagiy Limited.
• Process of improving the crease-resistance of textile fabrics which comprises impregnating the fabric with a solution of a reaction product of urea and formaldehyde consisting mainly of a methylol urea and containing a potentially acid ammonium salt and then heating the impregnated fabric to insolubilize the resin.
• Process of improving the crease-resistance of textile materials which consists in impregnating the material with a solution of a partial condensate of urea and formaldehyde containing an ammonium salt in quantity from 1 to 15 per cent of the amount of urea, and heating the impregnated material to insolubilize the resin and produce a crease-resisting product.
• Patent dated July 27, 1937. Disclaimer filed Nov. 25, 1946, by the assignee, Tootal Broadhurst Lee Oompagiy Limited.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Treatment Of Fiber Materials (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=10250617

Family Applications (1)

Country Status (5)

Cited By (31)

Families Citing this family (3)

• 0
  • BE BE411328D patent/BE411328A/xx unknown
  • NL NL43314D patent/NL43314C/xx active
• 1934
  • 1934-09-19 GB GB2687734A patent/GB449243A/en not_active Expired
• 1935
  • 1935-09-13 FR FR810347D patent/FR810347A/fr not_active Expired
  • 1935-09-16 US US4078635 patent/US2088227A/en not_active Expired - Lifetime

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