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
  • D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
  • D06M15/6436—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain containing amino groups
• • 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
  • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/356—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of other unsaturated compounds containing nitrogen, sulfur, silicon or phosphorus atoms
  • D06M15/3568—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of other unsaturated compounds containing nitrogen, sulfur, silicon or phosphorus atoms containing silicon

Definitions

• R is a monovalent hydrocarbon radical containing from 1 to 18 carbon atoms and n is a mean value of from 1.9 to 2.1, the relative viscosity of which silicone rubber emulsion in a toluene solution at 25 C. is at least 1.8, the textile materials are provided with excellent flexibility and springiness, and what is more, when the silicone rubber emulsion is applied to textile materials together with known resin-finishing agents heretofore employed for the purpose ofimproving the properties of the textile materials, it will serve to prevent the reduction of the strength of the textile materials which is one of the disadvantages ofthe known textile-material treating agents.
• This invention relates to a process of treating textile materials, especially for the purpose of providing them with flexibility and springiness.
• Textile materials on the market are usually treated with resin so that they may be creaseand shrinkage-resistant, but such fabrics are apt to feel hard and have inferior physical properties due to their reduced strength.
• silicone oil or others are employed as a softener together with the treating agents, but a comparatively large amount of resin has to be employed under a severe condition when carrying out the permanent press which has become very popular these days. Therefore the use of the softener mentioned above often fails to maintain the desired strength and flexibility of the fabrics.
• silicone oil provides cellulosic fabrics with comparatively good flexibility, but when the textile materials are of synthetic fibers such as polyester, polyamide or a mixture of polyester and cotton, no sufficient flexibility can be expected to be imparted by the silicone oil.
• the present invention relates to a method of treating textile materials which is free from the above disadvantages.
• the primary object of the invention is to provide a process for treating textile materials which gives them excellent flexibility and springiness in order to improve their touch, and another object is to provide a process of treating textile materials in which emulsions, easy to handle and having excellent stability, are employed to give the above-mentioned effect. Still another object is to provide a process, which, even when employed in combination with known processes comprising the treatment with resin substances, gives superior touch to the textile materials, besides improving their tear resistance.
• the present invention is characterized by treating textile materials with a silicone rubber emulsion containing, as its principal component, organopolysiloxane, prepared by emulsion-polymerization of organosilane or organosiloxane, which is represented by the unit formula:
• RuSiO in which R is a monovalent hydrocarbon radical containing from one to 18 carbon atoms and n is a mean value offrom 1.9 to 2.1 whose relative viscosity in a toluene solution (I g./100 cc.) at 25 C. is at least 1.8.
• the silicone rubber emulsion prepared by emulsion-polymerization of organosilane or organosiloxane is an emulsion consisting of corpuscles smaller than I micron, so that it can stand a long storage. and when textile materials are treated with this silicone rubber emulsion, better flexibility and springiness than those provided by the heretofore employed treating agents are obtained, and especially when the emulsion is employed together with the known resin-finishing agents, not only the flexibility and springiness and other physical properties of textiles are improved but also entire or partial reduction of their strength is prevented, which is apt to be brought about by the resin-finishing agents.
• the silicone rubber emulsion employed in the process of the invention is prepared by emulsion polymerization of organosilanes such as alkoxysilanes, or of cyclic or low-molecular straight-chained organosiloxanes.
• organosilanes such as alkoxysilanes, or of cyclic or low-molecular straight-chained organosiloxanes.
• it is prepared from octamethyl tetracyclosiloxane which is emulsified in an acid-type anionic emulsifier such as alkyl sulfonate or alkylsulfate, and is polymerized until the desired polymerization degree is obtained, and subsequently neutralized with alkali.
• Organopolysiloxane contained in said emulsion which is represented by the above-mentioned unit formula, must not be of too small polymerization degree.
• the relative viscosity, 177, of the polysiloxane, when measured at 25 C. in a toluene solution (1 g. of polysiloxane/100 cc. of toluene), must be 1.8 or above. If it is below 1.8, the textile materials treated with the emulsion will not acquire the desired excellent flexibility and other physical properties.
• the organic radical (R) contained in said organopolysiloxane is a hydrocarbon radical containing from one to 18 carbon atoms as mentioned before, and it is exemplified by saturated or unsaturated hydrocarbon groups such as methyl, ethyl, vinyl and allyl, and aromatic hydrocarbon groups such as phenyl.
• R/Si n saturated or unsaturated hydrocarbon groups such as methyl, ethyl, vinyl and allyl, and aromatic hydrocarbon groups such as phenyl.
• the ratio of said organic radical to silicon atoms given by R/Si n is smaller than 1.9 the textile materials treated with the emulsion will become hard and possess no excellent flexibility, so that the value ofn is defined to be between 1.9 and 2.1.
• the process of the present invention for the treatment of textile materials, is carried out very easily in the manner in which the known resin-finishing method is practiced.
• the silicone rubber emulsion prepared by emulsionpolymerization of organosilane or organosiloxane is diluted with water until the solid content of the solution becomes 0.1-5 percent by weight, then a textile material is dipped in the aqueous solution thus prepared and squeezed on a mangle so that the solution content of the textile material may be 30-200 percent.
• the solution-impregnated textile material is then dried at -l00 C. and further heated for 30 seconds 5 minutes at l20l80 C.
• the treated textile material may be subjected to soaping, washing with hot and/or cold water, and then dried.
• roller coating can be employed in order to apply the silicone rubber emulsion to the textile.
• the ratio of the silicone rubber component applied to the textile is generally 01-10 percent by weight of the textile.
• the compatibility of the silicone rubber emulsion with inorganic salts can be improved by the addition of nonionic, anionic or cationic emulsifier or high molecular materials, such as polyoxyethylene alkylphenol ether, polyoxyethylene alkyl ether, or block copolymer of polyoxyethylene and polyoxypropylene, and said silicone rubber emulsion can be employed in conjunction with resin-finishing agents such as methylol melamine, methylol urea or methylol melamine urea, the amount of the resin-finishing agent added to the emulsion being preferably less than 300 g./l.
• a hardening agent selected from the group consisting of zinc nitrate, magnesium chloride and an organic amine salt, in an amount of 5-30 percent of the resin contained in the emulsion.
• various finishing agents containing as a principal component, polyethylene, silicone oil, polyacrylic ester, polyvinyl alcohol, polyvinyl acetate or fluorine-containing resin may be used together with the silicone rubber emulsion.
• the process of the invention may be applicable to every kind of textile made of natural, semisynthetic or synthetic fibers, as well as to mixed or blended fabrics, giving an excellent effect.
• a test piece was subjected to 50 percent elongation either lengthwise or breadthwise for 1 minute, and 5 seconds after its length (1,) was measured, and the resilience recovery rate was and the value of the relative viscosity, 17r, is the viscosity mea- 5 calculated by the following equation: sured at 25 C. of the toluene solution of poiysiloxane prepared by dissolving l g. of polysiloxane in 100 cc. of 2l l 100 toluene.
• the values of the physical properties of the textile l materials given by the treatment of the present invention were obtained as follows:
• Te i t where 1, is the original length of the test piece.
• Emulsions E-O whose composmons are given in table l-h opening angle of the test piece was measured with a Monsanto were prepared by the method of emulsion-polymerization, crease-recovery tester, and the crease-recovery rate was cal- WM] 1
• a D d f Culated by the following equation: e emu sions were prepare or compara Ive purposes by adding an emuls1fier.a diluent and water in the ratios given a.
• EXAMPLE 1 Test pieces of cotton poplin (408') were each dipped into the treating solutions Nos. 1-16, mangled to the state containing percent of the solution in relation to the weight of the cloth (weight of silicone component/weight of cloth: 0.36 percent), subjected to the preliminary heating at 100 C. for 3 minutes, then to the heat treatment at 160 C. for 3 minutes, followed by soaping, hot-water washing, cold-water washing and drying.
• the tear resistance, the crease recovery rate, the value obtained by means of the Handle-O-Meter, and the touch of the test pieces thus treated are given in table 3.
• test pieces of cotton poplin (408) were treated with treating solutions Nos. H 23, and the tear resistance, the crease-recovery rate, the value obtained by means of the Handle-O-Meter and the touch of the test pieces thus treated proved to be as given in table 4. It is clear from the table that the test pieces treated with emulsion J of the invention gave better softness. springiness and recovery of crease than those treated with hitherto employed emulsion A consisting of silicone oil.
• EXAMPLE 3 Just as in example 1, test pieces of broadcloth (8OS' blend spun yarn) of 65 percent polyester fiber and 35 percent cotton were treated with treating solutions Nos. 24-30; and the tear resistance, the crease-recovery rate, the value obtained by means of Handle-O-Meter and the touch of the test pieces thus treated proved to be as given in table 5. It was found, as in example 2, that the treating solution, emulsion J, of the invention served to improve the physical properties of the textile materials better than emulsion A consisting ofsilicone oil.
• EXAMPLE 4 4 parts of emulsion A and emulsion J were each diluted with 96 parts of water, obtaining treating solution Nos. 31 and 32. Test pieces of tricot l00 percent polyester fiber) were dipped into either of the treating solutions, mangled and dried at 100? C. for 4 minutes. The test pieces thus treated proved to have l.2 percent by weight of silicone per 100 percent by weight of the textile material. The values obtained the Handle-O-Meter and the resilience recovery rates of the test pieces were as given in table 6.
• Test ieces of 'erse of 100 ercent acr lonitrile fiber TA P l y P Y Resilience recovery 2 5 were dipped into either of them, mangled, and dried at 100 C. value obtained rate, percent for 5 minutes.
• the test pieces thus treated proved to have 1.8 Treatin b means of Solutions HandiyOWIeter Length Breadth percent by weight of silicone per 100 percent by weight of the wise wise Remarks textile material.
• Tests described in exam le 4 were conducted Number (Slit. mm.), g P
• EXAMPLE 6 5 parts of emulsion A and emulsion F were each diluted melamine urea and dimethylol dihydroxyethylene urea, in the amount of less than 300 g./l. of said emulsion, in the presence ofa 50 weight percent solution ofa hardening agent selected from the group consisting of zinc nitrate, magnesium chloride and organic amine salt, in an amount of 5-30 percent by weight ofthe resin contained in the emulsion.
• a hardening agent selected from the group consisting of zinc nitrate, magnesium chloride and organic amine salt
• a process of treating textile materials which is characterized by dipping them in a silicone rubber emulsion, containing as its principal component, organopolysiloxane, prepared by emulsionpolymerization of organosilicone compounds selected from organosilane and organosiloxane, which is represented by a unit formula:
• R is a monovalent hydrocarbon radical, containing from I to 18 carbon atoms and n is a mean value of from 1.9 to 2.1, whose relative viscosity in a toluene solution at 25 C. is at least 1.8, then mangling them to the state of containing from 30 to 200 percent of the solution in relation to the weight of the textile materials, drying them at 80-l00 C. and further heating them for 30 seconds5 minutes at l-l 80 C.

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

Applications Claiming Priority (1)

Publications (1)

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Cited By (9)

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Citations (5)

• 1968
  • 1968-06-04 JP JP43038200A patent/JPS4832991B1/ja active Pending
• 1969
  • 1969-05-21 US US826723A patent/US3619278A/en not_active Expired - Lifetime
  • 1969-05-28 GB GB26932/69A patent/GB1261784A/en not_active Expired

Patent Citations (5)

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