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
  • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
  • D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
  • D06M10/08—Organic compounds
  • D06M10/10—Macromolecular compounds
• • 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
  • C08G77/12—Polysiloxanes containing silicon bound to hydrogen
• • 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
  • C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
• • 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
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D183/00—Coating compositions based on 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; Coating compositions based on derivatives of such polymers
  • C09D183/04—Polysiloxanes
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B21/10—Open-work fabrics
  • D04B21/12—Open-work fabrics characterised by thread material
• • 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
  • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
  • D06M10/001—Treatment with visible light, infrared or ultraviolet, X-rays
• • 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
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
  • D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
• • 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
  • D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
  • D06M14/18—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation
• • 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
• • A—HUMAN NECESSITIES
  • A41—WEARING APPAREL
  • A41B—SHIRTS; UNDERWEAR; BABY LINEN; HANDKERCHIEFS
  • A41B2400/00—Functions or special features of shirts, underwear, baby linen or handkerchiefs not provided for in other groups of this subclass
  • A41B2400/80—Friction or grip reinforcement
  • A41B2400/82—Friction or grip reinforcement with the body of the user
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2403/00—Details of fabric structure established in the fabric forming process
  • D10B2403/01—Surface features
  • D10B2403/011—Dissimilar front and back faces
  • D10B2403/0112—One smooth surface, e.g. laminated or coated

Definitions

• TITLE PROCESS FOR COATING A TEXTILE SUPPORT
• the present invention relates to a process for coating an openwork or elastic textile support with a crosslinkable silicone composition by polyaddition reactions by irradiation with UV radiation, the source of which is a UV-LED lamp.
• silicone compositions for coating textile materials to obtain properties of adhesion to the skin and of non-slip, in particular for certain clothing, hygiene articles and medical devices.
• the textiles thus obtained, as such or transformed into textile articles, can be used in many applications, such as, for example, in the field of clothing, in particular lingerie such as lace for stocking tops or bras. , hygiene articles, and medical devices, such as compression bandages or dressings.
• Patent applications WO 2007/112982 and WO 2010/139868 describe processes for coating a textile surface with an elastomeric silicone composition crosslinkable by polyaddition.
• the purpose of said silicone compositions is to give the textile an anti-slip property.
• the silicone coating is obtained by coating the fibrous support then hardening resulting from the polyaddition of unsaturated groups, typically alkenyl groups, of a polyorganosiloxane on hydrogens of the same or another polyorganosiloxane.
• unsaturated groups typically alkenyl groups
• a polyorganosiloxane on hydrogens of the same or another polyorganosiloxane.
• liquid silicone compositions crosslinking by condensation reactions retain significant appeal in this type of application. They offer the possibility of cross-linking at room temperature when exposed to humidity in the air. Mention may be made, for example, of patent applications WO 2010/146249, WO 2010/146250 and WO 2015/158967 which describe coating processes on a flexible support, in particular a textile, with a silicone elastomer composition crosslinkable by polycondensation.
• WO 2010/146249, WO 2010/146250 and WO 2015/158967 which describe coating processes on a flexible support, in particular a textile, with a silicone elastomer composition crosslinkable by polycondensation.
• RTV-1 technologies cold vulcanizable elastomer technologies, or "Room Temperature Vulcanising" according to the Anglo-Saxon terminology, packaged in a single package
• these compositions generate volatile organic compounds such as alcohol or acetic acid, which can be a prohibitive drawback.
• silicone formulations crosslinked under UV by polyaddition are described in the literature. Mention may be made, for example, of Japanese patent JP 06-531724 B2, which describes a process for manufacturing an airbag textile coated with a UV-curable silicone elastomer. This process consists of depositing a silicone composition on the textile material and then irradiating the coated surface with UV.
• a method and the silicone composition used were developed to address the problem of the adhesion of the silicone coating to the textile for the airbag and the problem of the formation of wrinkles on the surface of the coating.
• the final properties sought for the coating of an airbag fabric are completely different from the properties of adhesion to the skin and anti-slip sought for a clothing or hygiene fabric.
• One objective of the present invention is to provide a process for coating a silicone composition suitable for a textile support that is fragile in the face of a rise in temperature. Another objective is to propose a coating process whose coating rate is high, which makes it possible to achieve better productivity. In addition, it is desirable for this process to consume little energy, for a better production cost and a reduced environmental impact. Moreover, it is desired that the textile support thus coated with the silicone elastomer has good properties in terms of end use, in particular of adhesion to the skin and of anti-slip. Care must also be taken that, after coating and crosslinking of the silicone composition on the textile, there are no phenomena of release of oily substances which could stain the textile and/or its packaging. This silicone composition must also be non-toxic and odorless. It is also desirable for the coating to be able to resist washing and rubbing, and for it to have good resistance to elongation when the textile material is handled.
• the subject of the present invention is therefore a process for coating a crosslinkable silicone composition X by polyaddition reactions to form a silicone elastomer on an openwork and/or elastic textile support S comprising steps a), b) and c) following steps: a) a crosslinkable silicone composition X is provided by polyaddition reactions comprising:
• At least one organopolysiloxane A having, per molecule, at least two C2-C6 alkenyl groups bonded to silicon
• said silicone composition X is deposited continuously or discontinuously on at least one face of said textile support S, and c) one proceeds to the crosslinking of said silicone composition X by irradiation with UV radiation, the source of which is a UV-LED lamp.
• the textile support S coated on at least one side with a silicone elastomer obtainable by the method as defined above is also an object of the present invention.
• another object of the invention is the use of said coated textile support S in the field of clothing, in particular lingerie such as lace for tops, stockings or bras and sportswear, articles hygiene products, and medical devices, such as compression bandages or dressings.
• UV means ultra-violet.
• Ultraviolet radiation is defined as electromagnetic radiation whose wavelength is between about 100 nm and about 400 nm, ie below the visible light spectrum.
• LED is the abbreviation well known to those skilled in the art for “electroluminescent diode” (also DEL in French).
• the subject of the present invention is therefore a process for coating a crosslinkable silicone composition X by polyaddition reactions to form a silicone elastomer on an openwork and/or elastic textile support S.
• textile is a generic term encompassing all textile structures. Textiles can be made of yarns, fibers, filaments and/or other materials. They include in particular flexible fabrics, whether woven, glued, knitted, braided, felt, needled, sewn, or made by another method of manufacture.
• yarn we mean for example a continuous multifilament object, a continuous yarn obtained by assembling several yarns or a continuous yarn of fibers, obtained from a single type of fiber, or from a mixture of fibers.
• fiber is meant, for example, a short or long fiber, a fiber intended to be worked in spinning or for the manufacture of nonwoven articles or a tow intended to be cut to form short fibers.
• the textile may well consist of yarns, fibers and/or filaments having undergone one or more treatment steps before the production of the textile surface, such as, for example, texturing, stretching, stretching-texturing, sizing, relaxation, heat setting, twisting, setting, crimping, washing and/or dyeing.
• any type of textile support can be used.
• textiles of plant origin such as cotton, linen, hemp, jute, coconut, cellulosic fibers from paper
• textiles of animal origin such as wool, hair, leather and silks
• - artificial textiles such as: cellulosic textiles, such as cellulose or its derivatives; and protein textiles of animal or vegetable origin; and
• Synthetic textiles obtained by polymerization or polycondensation may in particular comprise in their matrix different types of additives, such as pigments, delustrants, matifying agents, catalysts, heat and/or light stabilizers, antistatic agents, flame retardants, antibacterial, anti-fungal and/or anti-mite agents.
• additives such as pigments, delustrants, matifying agents, catalysts, heat and/or light stabilizers, antistatic agents, flame retardants, antibacterial, anti-fungal and/or anti-mite agents.
• type of textile surfaces mention may in particular be made of surfaces obtained by rectilinear interlacing of yarns or fabrics, surfaces obtained by curvilinear interlacing of yarns or knits, mixed or tulle surfaces, nonwoven surfaces and composite surfaces.
• the textile support used in the method of the present invention may consist of one or more textiles, identical or different, assembled in various ways.
• the textile can be mono- or multi-layer(s).
• the textile support can for example consist of a multilayer structure that can be produced by different assembly means, such as mechanical means such as sewing, welding, or point or continuous bonding.
• the textile support can, in addition to the coating process according to the present invention, undergo one or more other subsequent treatments, also called finishing or finishing treatment. These other treatments can be carried out before, after and/or during said coating process of the invention.
• Other subsequent treatments include: dyeing, printing, laminating, coating, assembly with other materials or textile surfaces, washing, degreasing, preforming or fixing.
• the textile support S according to the present invention is an openwork and/or elastic textile support.
• the textile support according to the invention is perforated and elastic.
• a textile is said to be "openwork" when it includes free spaces not made up of textile.
• Said free spaces (which may be designated as pores, voids, cells, holes, interstices or orifices) may be evenly distributed or not on the textile. These free spaces can be created in particular during the development of the textile.
• the smallest of the dimensions of these free spaces it is preferable for the smallest of the dimensions of these free spaces to be less than 5 mm, in particular less than 1 mm.
• a textile is said to be "elastic" when it has an elasticity rate greater than 5%, preferably greater than 15%.
• the elasticity rate of a textile can typically go up to 500%.
• the elasticity rate represents the percentage of elongation of the textile when it is stretched to the maximum. Elongation can be longitudinal only, transverse only, or longitudinal and transverse.
• the textile support is a lace or an elastic band.
• a crosslinkable silicone composition X is provided by polyaddition reactions comprising:
• the organopolysiloxane A having, per molecule, at least two C2-C6 alkenyl groups bonded to the silicon, can in particular be formed:
• Y is C2-C6 alkenyl, preferably vinyl
• R 1 groups may be identical to or different from each other.
• organopolysiloxanes A may have a linear structure, essentially consisting of "D" siloxyl units chosen from the group consisting of the Y2S1O2 / 2, YR 1 Si0 2/2 and R ⁇ SÎOM siloxyl units, and of terminal "M” siloxyl units chosen from the group consisting of the siloxyl units YR ⁇ SiOi ⁇ , Y2R 1 SiOi/2 and R'; S i 01 2.
• the symbols Y and R 1 are as described above.
• terminal “M” units mention may be made of the trimethylsiloxy, dimethylphenylsiloxy, dimethylvinylsiloxy or dimethylhexenylsiloxy groups.
• D units mention may be made of the dimethylsiloxy, methylphenylsiloxy, diphenylsiloxy, methylvinylsiloxy, methylbutenylsiloxy, methylhexenylsiloxy, methyldecenylsiloxy or methyldecadienylsiloxy groups.
• linear organopolysiloxanes which can be organopolysiloxanes A according to the invention are:
• the organopolysiloxane A contains terminal dimethylvinylsilyl units and even more preferably the organopolysiloxane A is a poly(dimethylsiloxane) with dimethylvinylsilyl ends.
• a silicone oil generally has a viscosity between 1 mPa.s and 2,000,000 mPa.s.
• said organopolysiloxanes A are oils with a dynamic viscosity of between 20 mPa.s and 300,000 mPa.s, preferably between 100 mPa.s and 200,000 mPa.s at 25° C., and more preferably between 600 mPa.s and 150,000 mPa.s.
• the organopolysiloxanes A may additionally contain “T” (R′SiOs) siloxyl units and/or “Q” (S1O4 / 2) siloxyl units.
• R 1 are as described above.
• the organopolysiloxanes A then have a branched structure. Examples of branched organopolysiloxanes which can be organopolysiloxanes A according to the invention are:
• the silicone composition X does not comprise branched organopolysiloxanes or resins comprising C2-C6 alkenyl units.
• the organopolysiloxane compound A has a mass content of alkenyl unit of between 0.001% and 30%, preferably between 0.01% and 10%, preferably between 0.02 and 5%.
• the silicone composition X preferably comprises from 50% to 90% of organopolysiloxane A, more preferably from 60% to 87% by weight of organopolysiloxane A, and even more preferably from 70% to 85% by weight of organopolysiloxane A per relative to the total weight of the silicone composition X.
• the silicone composition X may comprise a single organopolysiloxane A or a mixture of several organopolysiloxanes A having, for example, different viscosities and/or different structures.
• the silicone composition X may comprise a mixture:
• organopolysiloxane compound A having, per molecule, at least two C2-C6 alkenyl groups bonded to silicon, as described above;
• organopolysiloxane compound A′ having, per molecule, a single C2-C6 alkenyl group bonded to silicon.
• the presence of a monoalkenyl polyorganosiloxane in the silicone composition X can advantageously improve the level of adhesion to the skin of the coated textile according to the invention.
• monoalkenyl organopolysiloxanes which can be organopolysiloxanes A′ according to the invention are:
• the silicone composition X preferably comprises from 4% to 20% of monoalkenyl organopolysiloxane A', more preferentially from 8% to 18% by weight of monoalkenyl organopolysiloxane A', and even more preferentially from 10% to 15% by weight of monoalkenyl organopolysiloxane A′ relative to the total weight of the silicone composition X.
• Organopolysiloxane B is an organohydrogenpolysiloxane compound comprising per molecule at least two, and preferably at least three, hydrogenosilyl functions or Si—H units.
• the organohydrogenpolysiloxane B can advantageously be an organopolysiloxane comprising at least two, preferably at least three, siloxyl units of the following formula: in which :
• R 2 radicals which are identical or different, represent a monovalent radical having from 1 to 12 carbon atoms
• R 2 f SiO (4-f)/2 in which R 2 has the same meaning as above, and f 0, 1, 2, or 3.
• R 2 can represent a monovalent radical chosen from the group consisting of alkyl groups having 1 to 8 carbon atoms, optionally substituted by at least one halogen atom such as chlorine or fluorine, the cycloalkyl groups having from 3 to 8 carbon atoms and aryl groups having 6 to 12 carbon atoms.
• R 2 can advantageously be chosen from the group consisting of methyl, ethyl, propyl, 3,3,3-trifluoropropyl, xylyl, tolyl and phenyl.
• the organohydrogenpolysiloxane B can have a linear, branched or cyclic structure.
• the degree of polymerization is preferably greater than or equal to 2. Generally, it is less than 5000.
• linear polymers these consist essentially of siloxyl units chosen from the following formulae units D: RLSiCf or D': R 2 HSi0 2/2 , and of terminal siloxyl units chosen from the units of following formulas M: R 2 3 SiOi/2 or M': R 2 2HSiOi/2 where R 2 has the same meaning as above.
• organohydrogenpolysiloxanes which may be organopolysiloxanes B according to the invention comprising at least two hydrogen atoms bonded to a silicon atom are:
• organohydrogenpolysiloxane B has a branched structure
• it is preferably chosen from the group consisting of the silicone resins of the following formulas:
• T siloxyl unit of formula R 2 ;SiO 12 and Q: siloxyl unit of formula S1O4/2 where R 2 has the same meaning as above.
• the organohydrogenpolysiloxane compound B has a mass content of hydrogenosilyl Si—H functions of between 0.2% and 91%, more preferably between 3% and 80%.
• the molar ratio of the hydrogenosilyl Si-H functions to the alkene functions can advantageously be between 0.2 and 20, preferably between 0.5 and 15, more preferably between 0.5 and 10, and even more preferably between 0.5 and 5.
• the viscosity of the organohydrogenpolysiloxane B is between 1 mPa.s and 5000 mPa.s, more preferably between 1 mPa.s and 2000 mPa.s and even more preferably between 5 mPa.s and 1000 mPa.s.
• the silicone composition X preferably comprises from 0.1% to 10% of organohydrogenpolysiloxane B, and more preferably from 0.5% to 5% by weight, relative to the total weight of the silicone composition X.
• the silicone composition X can comprise a single organohydrogenpolysiloxane B or a mixture of several organohydrogenpolysiloxanes B having, for example, different viscosities and/or different structures.
• the silicone composition X may comprise a mixture:
• At least one organohydrogenpolysiloxane B as described above comprises two SiH functions per molecule
• At least one organohydrogenpolysiloxane B as described above comprises at least three SiH functions per molecule.
• Organohydrogenpolysiloxane B comprising two SiH functions per molecule acts as an extender.
• Organohydrogenpolysiloxane B comprising at least three SiH functions per molecule acts as a crosslinker.
• the hydrosilylation catalyst C has the particularity of being activatable by UV irradiation. It is an essentially inactive compound in the absence of irradiation. When subjected to UV irradiation, preferably at a wavelength between 200 nm and 400 nm, it activates and becomes a hydrosilylation catalyst, which allows the reaction between the alkenyl groups of the organopolysiloxane A and the hydrogenosilyl functions of the organopolysiloxane B.
• the hydrosilylation catalyst C according to the present invention is preferably a platinum compound. It may in particular be chosen from platinum b-diketonate complexes, h-5-cyclopentadienyl-trialkyl platinum complexes, or their derivatives.
• the hydrosilylation catalyst C can be chosen from platinum (II) bis- (acetylacetonate), platinum (IV) trimethyl-(methylcyclopentadienyl), platinum (IV) trimethyl-(trimethylsilyl-cyclopentadienyl) ( IV) and mixtures thereof.
• the hydrosilylation catalyst C is preferably used previously below in a suitable solvent. Nevertheless, it is not excluded to use it in solid form.
• the catalytically effective quantity of catalyst C is generally between 2 ppm and 400 ppm by mass, preferably between 5 ppm and 200 ppm by mass, calculated by weight of metal, based on the total weight of the silicone composition X.
• the presence of an additional hydrosilylation catalyst conventionally thermally activatable is not essential in the silicone composition X.
• the silicone composition X according to the invention does not contain any catalyst. thermally activatable hydrosilylation. In particular, it does not contain Karstedt's platinum catalyst.
• the silicone composition X according to the present invention may optionally comprise a photosensitizer.
• a photosensitizer can be chosen from molecules that absorb different wavelengths from those absorbed by catalyst C in order to extend its spectral sensitivity.
• photosensitizers well known to those skilled in the art. Mention may be made of: anthracene, pyrene, phenothiazine, Michler's ketone, xanthones, thioxanthones, benzophenone, acetophenone, carbazole derivatives, fluorenone, anthraquinone, camphorquinone or oxides of acylphosphine.
• the photosensitizer when it is present in the composition can be added at a level of 0.05% to 10%, preferably between 0.1 and 2%, by weight relative to the total weight of the silicone composition X.
• the presence of a photosensitizer is not essential in the silicone composition X.
• the silicone composition X according to the invention does not contain a photosensitizer.
• the silicone composition X according to the present invention may optionally comprise other components.
• the silicone composition X according to the present invention may optionally comprise a filler D, preferably a reinforcing filler or a filler.
• the reinforcing fillers are preferably combustion silicas or precipitation silicas.
• Mineral fillers of silica type preferably have a specific surface, measured according to BET methods, of at least 50 m 2 /g, in particular between 50 m 2 /g and 400 m 2 /g, preferably greater than 70 m 2 / g, an average dimension of the primary particles of less than 0.1 ⁇ m (micrometer) and an apparent density of less than 200 g/litre.
• Mineral fillers of silica type can be incorporated as such in the silicone composition or optionally be treated with a compatibilizer.
• these silicas can optionally be treated with one or more organosilicon compounds, for example organosilane or organosilazane, usually used for this use.
• These compounds include methylpolysiloxanes such as hexamethyldisiloxane, octamethylcyclo-tetrasiloxane, methylpolysilazanes such as hexamethyldisilazane, hexamethylcyclotrisilazane, tetramethyldivinyldisilazane, chlorosilanes such as dimethyl-dichlorosilane, trimethylchlorosilane, methylvinyldichlorosilane, dimethylvinylchlorosilane, alkoxysilanes such as dimethyldimethoxysilane, dimethylvinylethoxysilane, trimethylmethoxysilane. These compounds can be used alone or as a mixture.
• the silica can optionally be predispersed in a silicone oil, so as to obtain a suspension. It is particularly preferred to use a suspension of fumed silica treated, in particular with hexamethyldisilazane, in a polyorganosiloxane oil, in particular vinyl-coated.
• the silicone composition X preferably comprises from 5% to 20% of filler D, and more preferably from 8% to 18% by weight of filler D, relative to the total weight of the silicone composition X.
• filler D it is also possible to add in the silicone composition X other types of fillers, in particular fillers, such as, for example, crushed quartz, diatomaceous earth, calcium carbonate and/or kaolin. .
• the silicone composition X according to the present invention may optionally comprise at least one non-reactive polyorganosiloxane compound E, in particular in the form of an oil or resin, generally to adjust the viscosity of the composition or to act as a diluent .
• This polyorganosiloxane compound E does not comprise reactive groups of the alkenylsilyl and/or hydrogenosilyl type.
• the polyorganosiloxane compound E can advantageously be an organopolysiloxane comprising:
• the non-reactive polyorganosiloxane compound E is a dimethylpolysiloxane oil with trimethylsilyl ends.
• the silicone composition X according to the present invention may optionally comprise other additives traditionally used in this technical field by those skilled in the art, for example dyes, pigments, fire resistance agents, bactericides, mineral or organic pigments, etc.
• a crosslinking inhibitor is present in silicone compositions crosslinking by polyaddition.
• the function of the cross-linking inhibitor is to slow down the hydrosilylation reaction. Mention may be made, by way of examples, of the following products which are commercially available: 1-ethynyl-l-cyclohexanol, methyl-3-dodecyne-l-ol-3, trimethyl-3,7,ll-dodecyne- l-ol-3, diphenyl-l,l-propyne-2-ol-l, ethyl-3-ethyl-6-nonyne-l-ol-3 and methyl-3-pentadecyne-l-ol- 3.
• the presence of a crosslinking inhibitor is not essential in the silicone composition X according to the present invention insofar as the hydrosilylation catalyst C is activated by UV irradiation.
• the silicone composition X according to the invention does not contain any crosslinking inhibitor. In particular, it does not contain 1-ethynyl-l-cyclohexanol (ECH).
• an adhesion promoter compound may be present in the silicone compositions when these are intended to be used as a coating on smooth and dense surfaces.
• An adhesion promoter can be an organosilicon compound comprising an adhesion promoter functional group.
• it may be an organosilicon compound comprising:
• VTMO vinyltrimethoxysilane
• GLYMO 3-glycidoxypropyl-trimethoxysilane
• MEMO methacryloxypropyltrimethoxysilane
• the silicone composition X according to the present invention does not contain any adhesion-promoting compound.
• the silicone composition X according to the present invention preferably does not contain any of the adhesion-promoting compounds mentioned individually above.
• the silicone composition X according to the invention comprises, based on the total weight of the silicone composition X:
• organopolysiloxane A having, per molecule, at least two C2-C6 alkenyl groups bonded to silicon
• organopolysiloxane B having, per molecule, at least two SiH units
• a filler D preferably of silica optionally treated with a compatibilizer.
• the silicone composition X further comprises:
• the percentages and ppm are mass percentages and ppm.
• the quantity by weight of catalyst C is calculated by weight of platinum metal.
• the silicone composition X has a dynamic viscosity of between 50,000 mPa.s and 300,000 mPa.s, more preferably of between 80,000 mPa.s and 200,000 mPa.s.
• the silicone composition X can be prepared by mixing all of the different components as described above.
• the silicone composition X according to the invention can be prepared from a two-component system characterized in that it comes in two separate parts intended to be mixed to form said silicone composition X, and in that one of the parts comprises the catalyst C and does not comprise the organopolysiloxane B, while the other part comprises the organopolysiloxane B and does not comprise the catalyst C.
• the silicone composition X according to the invention can be a single-component system.
• said silicone composition X is deposited continuously or discontinuously on at least one face of said textile support S.
• the deposition can be done typically by transfer, by lick roll or by spraying using a nozzle, a doctor blade, a rotating frame or a reverse roll (or "reverse roll” according to English terminology). -Saxon).
• the thickness of the layer of silicone composition X deposited on the textile can be between 0.1 mm and 0.8 mm, preferably between 0.3 mm and 0.6 mm and even more preferably between 0.4 mm and 0.5mm.
• the deposition of the silicone composition X on at least one side of said textile support S can be done by printing, typically using a printer.
• a person skilled in the art may use any type of printer technology suitable for depositing a silicone composition. Mention may be made, for example, of inkjet printing techniques as described in application WO 2020/249694. Alternatively, extrusion printing technology can be used.
• the techniques and devices described for the 3D printing of silicone composition are applicable to the deposition of silicone composition according to the present invention, insofar as only a single layer or a small layer is deposited. number of layers. It is possible to repeat the deposition (b) and crosslinking (c) steps of the process that is the subject of the present invention several times if necessary to obtain the desired shape and thickness of deposit.
• said silicone composition X is crosslinked by irradiation with UV radiation, the source of which is a UV-LED lamp.
• Said UV-LED lamp can emit radiation of wavelength 365 nm, 385 nm, 395 nm or 405 nm.
• the UV-LED lamp is a lamp emitting at 365 nm.
• the power of the UV-LED lamp is preferably between 2 W/cm 2 and 20 W/cm 2 , more preferably between 5 W/cm 2 and 15 W/cm 2 .
• the irradiation of the silicone composition X is carried out continuously, by scrolling the textile support S under the UV-LED lamp.
• the running speed and the number of passages can be defined so that the total irradiation of the silicone composition takes place for a period of between 1 s and 60 s, more preferably between 2 s and 40 s, and so even more preferred between 3 s and 15 s.
• the energy received by the silicone composition X by irradiation is preferably between 100 mJ/cm 2 and 5000 mJ/cm 2 , more preferably between 500 mJ/cm 2 and 3500 mJ/cm 2 , and even more preferably between 1200 mJ/cm 2 and 2500 mJ/cm 2 .
• step (c) of crosslinking is implemented without inerting. However, it is not excluded to proceed under an inert atmosphere, for example under nitrogen, under argon or under oxygen-depleted air.
• Crosslinking step (c) is carried out at a temperature between 15°C and 60°C, more preferably between 20°C and 40°C, and even more preferably at room temperature, i.e. typically about 25°C.
• coated textile supports thus obtained, as such or transformed into textile articles, can be used in many applications, such as, for example, in the field of clothing, in particular lingerie such as lace for tops, stockings or support bra, and sportswear, and hygiene items, such as compression bandages or bandages.
• DI fumed silica treated with a mixture of hexamethyldisilazane and divinyl-tetramethyl-disilazane
• Cross-linking inhibitor 1-ethynyl-l-cyclohexanol (ECH).
• compositions were prepared according to Table 1 below: [Table 1] The compositions have been formatted:
• compositions thus shaped were subjected at ambient temperature (approximately 25° C.) to UV irradiation on a UV bench from the company IST (operating conditions: speed: 4 m/min; Lamp: 365 nm LED; manufacturer power: 12 W/cm 2 , no inerting of the product; approximately 5 to 10 passages under the lamp). Curing took place for 5 to 10 s under the UV-LED lamp.
• Hardness The property of hardness was measured on a Bareiss BS61 durometer according to ISO 868
• Blocking is an application test to determine the force to unstick a coated lace folded back on itself. This test is indicative of the completion of the crosslinking. The blocking was evaluated by lace tensile test with a Zwick dynamometer.
• Adhesion test is carried out by a lace elongation test. A length of 100 mm is pulled with a Zwick dynamometer with a force of 70N and returned to the initial state. The cycle is repeated 25 times and a macroscopic observation is carried out to evaluate the grip of the silicone on the lace.
• the results obtained with catalyst C2 are identical to the results obtained with a traditional catalyst C3 (Comparative Examples 1 and 2).
• the crosslinking took place for 5 to 10 s under the UV-LED lamp in examples 2 and 4, against 1 min at 130° C. in comparative examples 1 and 2, which constitutes a significant advantage in terms of productivity.
• Examples 1 and 3 show somewhat higher blocking values, but nevertheless still acceptable for the desired application, and could be improved by longer irradiation.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Polymers & Plastics (AREA)
• Medicinal Chemistry (AREA)
• Materials Engineering (AREA)
• Wood Science & Technology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Toxicology (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Paints Or Removers (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=74758826

Family Applications (1)

Country Status (6)

Family Cites Families (24)

• 2021
  • 2021-07-26 JP JP2023506132A patent/JP7523666B2/ja active Active
  • 2021-07-26 KR KR1020237006506A patent/KR20230041074A/ko unknown
  • 2021-07-26 WO PCT/FR2021/000081 patent/WO2022023622A1/fr unknown
  • 2021-07-26 EP EP21755799.0A patent/EP4189155A1/de active Pending
  • 2021-07-26 CN CN202180061519.9A patent/CN116075244A/zh active Pending
  • 2021-07-26 US US18/007,010 patent/US20230295869A1/en active Pending

Also Published As

Similar Documents

Legal Events