Classifications

• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
  • D02G3/46—Sewing-cottons or the like
• • 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
  • C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
  • C08G64/18—Block or graft polymers
  • C08G64/186—Block or graft polymers containing polysiloxane sequences
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
  • C08L83/04—Polysiloxanes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
  • C08L83/10—Block- or graft-copolymers containing polysiloxane sequences
• • 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
  • D06M15/507—Polyesters
  • D06M15/513—Polycarbonates
• • 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
• • 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
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/04—Polysiloxanes
  • C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
  • C08G77/24—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen halogen-containing groups
• • 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
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/42—Block-or graft-polymers containing polysiloxane sequences
  • C08G77/445—Block-or graft-polymers containing polysiloxane sequences containing polyester sequences
  • C08G77/448—Block-or graft-polymers containing polysiloxane sequences containing polyester sequences containing polycarbonate sequences
• • 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
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/70—Siloxanes defined by use of the MDTQ nomenclature
• • 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
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber
  • Y10T428/2933—Coated or with bond, impregnation or core
  • Y10T428/2962—Silane, silicone or siloxane in coating
• • 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
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber
  • Y10T428/2933—Coated or with bond, impregnation or core
  • Y10T428/2964—Artificial fiber or filament
  • Y10T428/2967—Synthetic resin or polymer
  • Y10T428/2969—Polyamide, polyimide or polyester
• • 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
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31507—Of polycarbonate
• • 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
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31652—Of asbestos
  • Y10T428/31663—As siloxane, silicone or silane
• • 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
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31786—Of polyester [e.g., alkyd, etc.]

Definitions

• This invention relates to a process for the dressing of sewing thread, in particular polyester thread, for the purpose of reducing its friction produced when sewing.
• Dressing agents of this kind are already known and the substances used may be e.g., polydiorganosiloxane oils or a mixture of these oils and polyethylene waxes. Hydrocarbon-siloxane copolyners are also known to reduce friction.
• n is an integer of about to 90 with an a,w-dihydroxypolycarbonate of the following formula
• These finishes are preferably applied to the threads from aqueous emulsions or as a mixture of siloxane and waxes which are free from silicon.
• eachR independently is a halogen atom or an alkyl radical having one to four carbon atoms
• p is an integer of from 1 to 7, and
• a is zero or an integer of from 1 to 4, and about 65 to 92 percent by weight of polydimethylsiloxane segments having an average chain length of about 15 to 90 dimethylsiloxane units, the individual segments being linked via aryl-O-Si bonds (Component B), which solution or emulsion may also contain polydiorganosiloxanes having a viscosity of about 500 to 20,000 cP, preferably about 1000 to 10,000 cPat 20C (Component A).
• the polycarbonate-polydimethylsiloxane block copolymers may be prepared by reacting an a,w-dichloropolydimethylsiloxane of the formula R! R a O C Sl a an. I II J I C R in the presence of a tertiary amine.
• the process is carried out by reacting 1 mole of the a,w-dihydroxypolycarbonate dissolved in an inert organic solvent with about 0.5 to 5 moles of the a,w-dichloropolydimethylsiloxane in the presence of a quantity of tertiary amine which is stoichiometrically equivalent to the chlorine content of the a,w-dichloropolydimethylsiloxane and then heating the reaction mixture to a temperature of about 60C to 100C and isolating the reaction product by filtering off the amine salt and removing the solvent.
• the polycarbonates with terminal hydroxyl groups to be used according to the invention preferably have a chain length of about 2 to 5 diphenylalkane units and may be derived from any bis-phenols.
• R may represent e.g., a methyl, ethyl, propyl, isopropyl, butyl, isobutyl or tertiary butyl radical or a chlorine, bromine or iodine atom;
• R which may include inert substituents, is preferably a hydrocarbon radical such as an alkyl radical, e.g., methyl, ethyl, propyl or butyl, an alkenyl radical, e.g., vinyl, a cycloalkyl or haloalkyl radical, e.g., chlorobutyl or cyclohexyLa substituted or unsubstituted aryl radical, e.g., phenyl, chlorophenyl,
• Block copolymers obtained by the process according to US. Pat. No. 3,189,662, for example, are also suitable for the process according to the invention.
• the polydiorganosiloxanes (Component A) which are optionally added to the solution or emulsion may be obtained by known methods.
• Suitable polydiorganosiloxanes are e.g., polydialkylsiloxanes or also polydiorganosiloxanes which contain dialkylsiloxy groups and diarylsiloxy groups statistically distributed. Polydimethylsiloxane is preferred.
• the quantity of polydiorganosiloxanes added may vary within a wide range. Preferably, about parts by weight of A are added to 5 to 50 parts by weight of Component B.
• the polycarbonatepolydimethylsiloxane block copolymers are applied to the thread from a solution or emulsion. If the block copolymer is to be applied from solution, a 3 to 40 percent by weight solution is prepared to which varying v quantities of Component A may be added.
• about 150 to 180 g of A are used for every 26 to 32 g of B, together with the amount of solvent needed to produce a 16 to 20 percent solution.
• the solvent used for example, may be trichloroethylene, perchloroethylene, methyl chloroform, chlorobenzene or a mixture thereof.
• a solution of component B or of components A and B in a non-polar solvent such as toluene, xylene, petroleum hydrocarbons or mixtures of such solvents with trichloroethylene or perchloroethylene is first prepared.
• This solution is then emulsi fied in water in the usual manner with the addition of a conventional stabilizing agent, preferably a commercial partly hydrolyzed polyvinyl acetate, hereinafter briefly referred to as polyvinyl alcohol, and optionally with the addition of an ethoxylated alcohol.
• a conventional stabilizing agent preferably a commercial partly hydrolyzed polyvinyl acetate, hereinafter briefly referred to as polyvinyl alcohol, and optionally with the addition of an ethoxylated alcohol.
• the proportions of the different components are so chosen that the emulsion contains about 30 to 40 percent by weight of B or of A B.
• a B a mixture of A B is used, it has been found preferable to use the components in proportions, by weight. of about 25 to 30 parts of A, about 7 to 11 parts of B, about 2 to 3 parts of polyvinyl alcohol, about 21 to 24 parts of solvent and about 35 to 40 parts of water.
• the sewing threads are dressed by the process according to the invention e.g., by bringing them into contact with the emulsion or solution of component B or of a mixture of A B by a rewinding process using a drive roller and then drying them by heating to about 80 to 100C.
• Sewing threads which have been dressed by the process according to the invention in particular polyester sewing threads, have the advantage over sewing threads dressed by known methods that they have lower coefficients of friction, which are a measure of the friction produced.
• the dressings are more evenly distributed over the surface of the thread, as determined by the range of scatter of the coefficient of friction. Sewing can therefore be carried at higher speeds with such threads.
• the essential properties which determine the sliding of a sewing thread namely its coefficient of friction, and the scatter range of friction, are determined by means of a friction measuring device called F meter and made by Rothschild, Zurich, at 20C/65 percent relative humidity applying a preliminary tension of g (see e.g. Melliand Textilberichte 42 1961 374-3 79).
• the quantity of dressing applied is preferably from about 1 to 7 percent, especially about 3 to 5 percent by weight, based on the sewing thread although quantities above or below this range may be used.
• EXAMPLE 1 An emulsion is prepared by first mixing 68.4 g of a with this emulsion has a coefficient of friction of 1.0
• the 24 g of polycarbonate-polysiloxane block copolymers used in the above example are replaced by the corresponding quantity of polydimethylsiloxane having a viscosity of 10,000 cP at 20C, i.e., if the process is carried out without the block copolymer B, the sewing threads obtained have a coefficient of friction of 3.0 and a range of scatter of between 40 and 75.
• EXAMPLE 2 This example demonstrates the relationship between the sliding properties of sewing threads and the quantity of components B when the total quantity of (A B) in the emulsion is kept constant, the composition of the emulsion being otherwise the same as in Example 1. The results given in Example 1 have been repeated here for clarity.
• polyester fibers employed in the foregoing examfjg g ff g g f l gf f ples were polyethylene terephthalate but other polyesg g friction A g ters falling within the definition of that term as set forth in the Rules promulgated under the Textile Fibers iden- 33 if; tification Act can be similarly treated with similar effect.
• the yarns may be 100 percent polyester or blends thereof with other natural and/or man-made fibers, ei-
• EXAMPLE 5 ther in staple or filament form. While polyesters are This Example was carried Out using n emulsion preferred, the invention is also applicable to polyesterwhich contained only a polycarbonate-polysiloxane l 5 free yams uch 35 nylon, acrylics, and the like,
• p is an integer from i to 7 and 40 a is an integer from 0 to 4,
• siloxane segments having an average chain length of A polyester filament yarn dressed with a trichloroethabout to 90 dlmethylslloxane unitsylene solution which contained 165 g of a siloxane A (viscosity 20,000 cP/2 0C) in addition to 29 g of the 7% of solids by weight. block copolymefr mennoned m Example 5 and m much 3.
• the thread of claim 2 wherein the solids include zoncegtratlon i 9 g g g a polydiorganosiloxane having a viscosity of about 500 to f CO6 Clem O a to 20,000 cP at 20C, about5 to parts by weight of gg g ig gs igg gi x 9 and 23 50 said block copolymer being present per 100 parts of z l l l
• the block copolymer B is replaced gzgigtiz gi gifi wherein is methyl p is i r 1 1 1 9 1 by the corresponding quanitiy of a paraffin wax and the about 2 to 5, a is O, and the polydiorganosfloxane is same sewin threads are dressed with this emulsion, the threads are found to have a coefficient of friction of 2.8 polydimethylslloxane having a vlscoslty of about

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Knitting Of Fabric (AREA)
• Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)

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Citations (5)

• 0
  • BE BE792727D patent/BE792727A/xx unknown
• 1972
  • 1972-12-07 US US00313075A patent/US3844826A/en not_active Expired - Lifetime
  • 1972-12-13 IL IL41071A patent/IL41071A/xx unknown
  • 1972-12-14 CA CA158,873A patent/CA988262A/en not_active Expired
  • 1972-12-14 AT AT1068072A patent/AT326606B/de not_active IP Right Cessation
  • 1972-12-14 IT IT54701/72A patent/IT974062B/it active
  • 1972-12-15 JP JP47125326A patent/JPS4864298A/ja active Pending
  • 1972-12-15 FR FR7244820A patent/FR2163699B1/fr not_active Expired
  • 1972-12-15 CH CH1834972D patent/CH1834972A4/xx unknown
  • 1972-12-15 GB GB5797872A patent/GB1359798A/en not_active Expired
  • 1972-12-15 ES ES409635A patent/ES409635A1/es not_active Expired
  • 1972-12-15 CH CH1834972A patent/CH555930A/xx unknown
  • 1972-12-15 NL NL7217110A patent/NL7217110A/xx unknown

Patent Citations (5)

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