Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
  • C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
  • C08G12/04—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
  • C08G12/10—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with acyclic compounds having the moiety X=C(—N<)2 in which X is O, S or —N
  • C08G12/12—Ureas; Thioureas
• • 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
• • 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

• the first applications of this method were made with resins obtained by condensation of phenols with formaldehyde, by utilizing the so-called 10 bakelization process.
• This process is chiefly intended to fix the filling ma- 15 terial's on the fabrics but it'produces, as the Gunther process, a permanent stiffening matter which resists washing and rumpling.
• this process has the disadvantage of being somewhat expensive, due to the utilization of thiourea.
• Fabrics treated according to the processes above mentioned have more or less different 40 qualities according to the nature of the resins that are utilized, the concentration of the resin solutions, etc., but they are permanently stiffened or dressed, that is to say they are capable of 45 resisting washing and rumpling.
• ammonium sulphide can combine with formaldehyde without disengagement of sulphuretted hydrogen so as to give com-.
• the resins above referred to are prepared in the state of aqueous solutions only little condensed (for instance by causing the reagents to act on one anotherin the cold state) and diluted in such manner as to obtain a suitable concentration, which varies with the nature of the fabrics to be treated and of the final-effect to be obtained.
• This concentration may range between 10 and 30 per cent.
• Colouring materials, fillers, plastifiers or softening matters may be eventually added to the solutions, and the fabric is. immersed into the bath while suitably stirring it.
• the final polymerization of the resin with which the fabric has been treated is performed through the action of heat at a tem- 15 perature which may range between 70 and 160 C., for instance by causing the fabric to pm over heated cylinders.
• the same degree of polymerization is fabric thus obtained has a very good feel and resists rumpling.
• Example II A fabric is impregnated with a solution containing 500 parts of formaldehyde of 30% in weight, 150 parts of urea, 300 parts of ammonium sulphide of 30% and 2000 parts of water. The fabric is freed from the excess of water and then dried for ten minutes at a temperature of 150 C.
• Example [IL-A viscose fabric is impregnated in a solution containing 900 parts of formaldehyde of 30%, 300 parts of urea, 150 parts of ammonium sulphide of 30%, 1000 parts of water, parts of sulphonated cetyl alcohol, 50 parts of ammonium suiphocyanide, and 20 parts of pure azol blue. The fabric is then treated as in Example II.
• Example IV The fabric is impregnated as in Examples I and II, then freed from the excess of water and dried. It is then caused to pass over smooth cylinders heatedat a temperature of 100 C., Finally polymerization of the resin is completed by causing the fabric to pass on engraved cylinders heated at a temperature of 150 C.
• the dressed and goifered fabric thus obtained is capable of resisting flattening and rumpling actions.
• creasing and rumpling while retaining their flexibilit'y which comprises the steps of impregnating such fabric in aqueous solution in the cold state, with a soluble condensation product resuiting from the reaction of formaldehyde with a sulphur containing ammonium salt of the group consisting of ammonium sulphides and ammonium sulphocyanide in the presence of urea, and then polymerizing the condensation product impregnated in the fabric by heating the impregnated fabric to a temperature of between C. to 150 C. for a period'of not over ten minutes.
• the continuous process of treating woven or knitted cellulosic textile fabrics to enable them to resist creasing and rumpling while retaining their flexibility which comprises passing the fab ric in the cold state through a bath which consists of a substantially neutral aqueous solution of a soluble condensation product resulting from the reaction of formaldehyde with a sulphur containing ammonium salt of the group consisting l of ammonium sulphides and ammonium sulphocyanide in the presence of urea, removing excess liquid from the fabric, drying it, and polymerizing the condensation product impregnated in the fabric by continuously subjecting successive- 20 sive portions of the impregnated fabric to a temperature of from approximately C. to C. for from approximately 1 to 2 minutes.

Landscapes

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

Applications Claiming Priority (1)

Publications (1)

Family

ID=9162704

Family Applications (1)

Country Status (4)

Cited By (10)

Families Citing this family (2)

• 0
  • BE BE402238D patent/BE402238A/xx unknown
• 1933
  • 1933-03-31 FR FR753559D patent/FR753559A/fr not_active Expired
• 1934
  • 1934-03-27 US US71768134 patent/US2049217A/en not_active Expired - Lifetime
  • 1934-03-28 GB GB973434A patent/GB424535A/en not_active Expired

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