Classifications

• • 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
  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/02—Emulsion paints including aerosols
  • C09D5/024—Emulsion paints including aerosols characterised by the additives
• • 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
  • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
  • C09D7/40—Additives
  • C09D7/65—Additives macromolecular
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
  • B01D46/0028—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
  • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
  • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
  • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
• • 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
  • C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
  • C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
  • C09D131/04—Homopolymers or copolymers of vinyl acetate
• • 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
  • C09D199/00—Coating compositions based on natural macromolecular compounds or on derivatives thereof, not provided for in groups C09D101/00 - C09D107/00 or C09D189/00 - C09D197/00
• • 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
  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
• • 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
  • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
  • C09D7/40—Additives
  • C09D7/60—Additives non-macromolecular
  • C09D7/63—Additives non-macromolecular organic
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2201/00—Details relating to filtering apparatus
  • B01D2201/26—Transport systems for filtering devices
  • B01D2201/265—Transport systems for filtering devices mounted on vehicles
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/54—Silicon-containing compounds
  • C08K5/541—Silicon-containing compounds containing oxygen
  • C08K5/5435—Silicon-containing compounds containing oxygen containing oxygen in a ring
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
  • C08L29/02—Homopolymers or copolymers of unsaturated alcohols
  • C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L31/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid; Compositions of derivatives of such polymers
  • C08L31/02—Homopolymers or copolymers of esters of monocarboxylic acids
  • C08L31/04—Homopolymers or copolymers of vinyl acetate
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
  • C08L75/04—Polyurethanes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
  • C08L79/02—Polyamines

Definitions

• the present invention relates to an aqueous coating composition for a textile, in particular for a cabin filter, intended for a motor vehicle.
• respiratory allergies can be mainly responsible for allergic rhinitis, itchy nose, runny nose, frequent stagnation, loss of smell, etc.
• allergens are water-soluble proteins with a three-dimensional structure that uses specific amino acid sequences. The expression of the allergenic nature of these amino acid sequences is expressed through the appearance of antibody-antigen reactions.
• Respiratory allergens can cause sleep disturbances and discomfort for the individual suffering from such an allergy.
• the elimination of aliergenes in the body is a task recognized as complex in the medical field because it aims to break down the allergen to make it inactive.
• the denaturing agents of allergen can in particular be applied to filtration materials, tools or cleaning tools, or on textiles, and also in the form of spray.
• Document JP2008094906 discloses in particular an aqueous composition for air filters comprising a denaturing agent of ailergene which may be aluminum or zirconium salts optionally accompanied by tannic acid,
• JP2006193624 relates to a composition for filters which can comprise as denaturing agent a pyridinium salt with, for example poly (acrylic acid) or poly (vinyl alcohol).
• the document WO2014 / 019660 relates to a multi-layer cabin air filtration device, one of the layers of which is impregnated with a composition comprising a denaturing agent based on tannins, such as tannic acid.
• the object of the invention is therefore to provide a coating composition for a textile, in particular for a cabin filter, intended for a motor vehicle, which is easy to handle when it is applied to a material, for example a textile nonwoven fibers, and this while ensuring good applicability of the composition on the material to be impregnated.
• the aim is to provide a coating which has adequate flexibility for, for example forming a nonwoven fiber coating which has a durable anti-allergenic function.
• an aqueous coating composition for a textile, in particular for a motor vehicle interior filter comprising:
• AdA denaturing agent of allergen
• the compatibilizer dud 'rt at least one compatibilizing agent of said at least one AdA.
• AdA interacts favorably with the latter. Indeed, it has been found that the compatibilizing agent makes it possible to maintain a flexibility of the AdA such that the coating obtained by means of the composition according to the invention has an adequate flexibility.
• the denaturing agent is capable, as its name suggests, of denaturing the activity of the allergen by binding thereto in order to modify its three-dimensional structure so as to inhibit its activity.
• the AdA is a way that avoids having to remove the allergen by decomposition, when it reaches the body.
• the combination between the compatibilizing agent and the AdA makes it possible to provide a composition which has a suitable degree of flow, which greatly facilitates the application of the composition to a material, such as a nonwoven fabric, and this while ensuring a homogeneous impregnation thereof on the targeted material.
• the provision of homogeneous impregnation ultimately serves to provide a coating whose anti-allergenic property has a prolonged life, compared to what can provide a known composition.
• composition according to the present invention thus makes it possible to confer the anti-allergenic function on the coating of a material which can be used in many fields of application, for example, in the field of floor coverings, sprays, textiles, etc.
• the AdA according to the invention is an AdA comprising a compound based on polyphenols which may be part of the family of tannins and / or may preferably be selected from the group consisting of tannic acid, extracted from olive leaf consisting of oleuropein and mixtures thereof.
• AdA is an inorganic AdA selected from the group consisting of alkaline earth metal salts, rare earth salts, zirconium salts, aluminum salts and mixtures thereof.
• the AdA is a cationic AdA selected from the group consisting of quaternary ammonium salts, pyridinium salts and mixtures thereof.
• said compatibilizer is selected from the group consisting of hydrophilic polymers, cationic polyelectrolytes, polycationics, anionic dispersions, functional silanes and mixtures thereof.
• the compatibilizing agent is chosen from the group consisting of polyallylamine, diallyldimethylammonium polychure, polyetheramine epichlorohydrin resin, polyethyleneimine, a polyurethane dispersion. , a dispersion of acrylate, polyvinyl alcohol, polyvinyl acetate, functional silane, perfluoroalkyl acrylate and mixtures thereof.
• the functional silane may be of the organosilane family including organoalkoxysilanes and having the following structure:
• R 3 wherein Z is vinyl, allyl and any other group capable of reacting doubly bonded upon reaction of radical polymerization
• R 1, F3 ⁇ 4, and F3 ⁇ 4 are reactive groups, such as a methoxy, ethoxy group and any other alkoxy, amino, epoxy, ureido, and vinyl group, chloride or bromide halogens, esters, such as groups acetoxy, or -O-Si or non-reactive groups such as groups of alkyl hydrocarbons or aryl groups.
• Ri, F3 ⁇ 4, and (3 ⁇ 4 can all be identical or different in nature but at least one of the R groups must be preferably reactive in order to interact favorably with the AdA.
• Non-limiting and exemplary, organofunctional silanes may be chosen from the list consisting of vinyltrichlorosilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinylmethyldichlorosilane, vinylmethyldimethoxysilane, vinylmethyldiethoxysilane, 5-hexenyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane and 3-glycidoxypropyltriethoxysilane. 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3- (meth) acryloxypropyltrimethoxysilane,
• the functional silane is an organosilane, preferably selected from the group consisting of 3-glycidopropyltrialkoxysilane, glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, and mixtures thereof.
• the functional silane contains an epoxy group, such as ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropylmethyldiethoxysilane, ⁇ - (3,4-epoxycyclohexyl) ethyltrimethoxysilane, ⁇ - (3,4-epoxycyclohexyl) ethylmethyldiethoxysilane.
• the composition according to the present invention advantageously comprises an antifungal agent, preferably selected from the group consisting of 1,2-benzisothiazolin-3-one, zinc pyrithione, sodium sorbate, sodium benzoate and mixtures thereof.
• the composition according to the invention may comprise an anti-foaming agent, preferably chosen from the group consisting of mineral oil, silicone, alcohol, tributyl phosphate, triethyl phosphate, and their mixtures.
• an anti-foaming agent preferably chosen from the group consisting of mineral oil, silicone, alcohol, tributyl phosphate, triethyl phosphate, and their mixtures.
• the mass ratio between the AdA and the polymer is between 15 and 70, preferably between 15 and 35.
• the composition according to the invention comprises between 40 and 75% of water, preferably between 45 and 70% of water, relative to the total weight of the composition.
• the composition comprises between 20 and 45% by weight of AdA, preferably between 20 and 35% by weight, relative to the total weight of the composition.
• the invention also relates to an article on which the composition according to the present invention is impregnated.
• the invention also relates to a coating comprising a layer of nonwoven fibers (i) impregnated with the composition according to the present invention.
• the present invention relates to an anti-allergen filter comprising at least one non-woven fiber filter layer on which the composition according to the present invention is impregnated.
• said at least one filtering layer is folded accordion-shaped.
• the filter according to the invention is a combined passenger compartment filter for a motor vehicle.
• the subject of the present invention is furthermore a method of manufacturing the anti-allergenic filter according to the present invention, comprising the following steps:
• a filter layer of nonwoven fibers having a fiber size of between 5 and 30 Dtex per filament, preferably between 10 and 20 Dtex per filament,
• the present invention also relates to a device for purifying the air of the passenger compartment of a motor vehicle successively comprising:
• the device further comprises a support layer (iv), said filtering layer (ii) for capturing gaseous pollutants from a gaseous medium and said particulate filtering layer (iii) being mutually connected. to one another via said support layer (iv).
• the present invention also relates to a method of manufacturing the device for purifying the air of the passenger compartment of a motor vehicle comprising the steps of:
• spunbond should be understood to mean that nonwoven fibers can be obtained by means of a “spunbond”, which consists of applying the fibers to one another to the melted state. These spunbond nonwoven fibers provide the textile with adequate rigidity. Thus, when the nonwoven fiber textile constitutes one of the layers of a passenger compartment filter of a motor vehicle, the rigidity of the filter is conferred by the presence of this layer of nonwoven fibers.
• Dtex is the abbreviation of the term decitex, which is the international unit of fineness of textile fibers. It is therefore understood by 1 Dtex, the mass in grams of a fiber having a length of 10,000 meters.
• the term “meltblown” refers to a “meltblowing” process which makes it possible to provide non-woven microfibers.
• these microfibers have the ability to filter smaller particles, compared to the nonwoven fiber layer (i) which has a higher fiber fineness.
• the term "ELISA” is the abbreviation of "enzyme-linked immunosorbent assays” and refers to an enzyme-linked immunoassay method for detecting in a small amount the presence of allergens on a given product.
• the "ELISA" sandwich test can be used to determine the effectiveness of an article impregnated with the composition according to the invention in order to evaluate its anti-allergenic properties.
• the "ELISA" sandwich test consists in reacting an allergen with an antibody, which is fixed on a solid phase. Then an antibody-enzyme conjugate is used. The amount of the targeted allergen in the study is detected by staining by making use of the enzyme associated with the antibody.
• the term "combined filter” should be understood to mean a bi-functional filter in that it is both a particulate filter and a filter stopping harmful gases present in the surrounding air.
• composition according to the invention is preferably intended to be used in an air purification device for the passenger compartment of a motor vehicle and in the field of textiles, more particularly on a spunbond-type nonwoven fabric textile. ".
• composition according to the present invention can also be used in other fields, for example to provide sprays, to cover materials requiring a durable anti-allergenic function, in the field of medical equipment.
• composition according to the present invention requires at least the use of an AdA in combination with a compatibilizing polymer capable of maintaining sufficient AdA flexibility. Indeed, it provides a coating that has the flexibility required.
• the composition according to the invention comprises an AdA which comprises a compound based on polyphenols of the tannin family, for example tannic acid, a polymer, such as 3-glycidopropyltrialkoxysilane, an antifungal agent and a antifoam agent.
• AdA comprises a compound based on polyphenols of the tannin family, for example tannic acid, a polymer, such as 3-glycidopropyltrialkoxysilane, an antifungal agent and a antifoam agent.
• the composition may also comprise up to 10% by weight, relative to the total weight of the composition, an isopropyl alcohol to impart stability to the final product formed from the composition according to the invention, and also to further improving the impregnation of the composition on a textile, such as a nonwoven fiber textile, preferably of the "spunbond" type.
• the AdA may be inorganic or cationic in nature.
• composition according to the invention may also comprise between 0.5 and 2% by weight of polymer, relative to the total weight of the composition.
• glycerin in the composition provides a coating that has such flexibility that it can be folded and held in its pleated form.
• the process for producing the composition according to the invention is a process which consists in mixing the AdA and the compatibilizing polymer at room temperature.
• composition according to the invention can be applied by impregnation to a coating which comprises a layer of nonwoven fibers (i).
• the layer of nonwoven fibers (i), preferably of the "spunbond” type, can be impregnated with the composition according to the invention by applying it by vaporization, padding, or coating ( Dip coating), or by passing the layer of nonwoven fibers (i) in a bath containing the composition according to the present invention.
• compositions to the nonwoven fiber layer (i) can be carried out according to a continuous or discontinuous process ("batch").
• the layer of nonwoven fibers (i) thus impregnated with the composition according to the invention can serve to form at least one layer of a filter having the anti-allergenic function and being intended to be arranged in the passenger compartment of a vehicle automobile.
• the filter can be multifunctional in that it is arranged to treat the air and to inhibit the air transported by the surrounding air, which is particularly advantageous for the user.
• the nonwoven fiber layer can be folded accordion-shaped to increase the contact area between the filter media, formed by the nonwoven fiber layer, and the 'air.
• the method of manufacturing an anti-allergen filter according to the invention may comprise the following steps:
• a filter layer of nonwoven fibers having a fiber size of between 5 and 30 Dtex per filament, preferably between 10 and 20 Dtex per filament,
• the filter layer of nonwoven fibers is of the "spunbond” type, as indicated above.
• step of impregnating the composition according to the invention on the filter layer of nonwoven fibers can be carried out by impregnation techniques known to those skilled in the art, and are particularly those described above.
• composition according to the invention can be used to provide a device for purifying the air of the passenger compartment of a motor vehicle, said device having the particularity of being multifunctional, in that it makes it possible to purify the air filtering particles, harmful gases in the air and inhibiting respiratory allergens.
• Such a device comprises successively at least the following layers:
• a nonwoven fiber layer arranged to impart rigidity to the device,
• a filter layer for capturing gaseous pollutants from a gaseous medium and applied to said nonwoven fiber layer, and
• said nonwoven fiber layer (i) being impregnated with the composition according to the present invention.
• the nonwoven fiber layer (i) arranged to impart rigidity to the device is preferably made of spunbond nonwoven fibers.
• the raw material intended to produce this layer of spunbond nonwoven fibers may be chosen from the group consisting of polypropylene, polyester, polyethylene, polyamide, polyurethane, and mixtures thereof.
• the spunbond-type nonwoven fiber layer comprises fibers with an inner layer (core) of polyethylene terephthalate (PET) and an outer layer around the core of PET, polyamide or polypropylene (PP). ).
• core polyethylene terephthalate
• PP polypropylene
• This layer of nonwoven fibers (i) is located on the side of the arrival of the air to be filtered and may have a thickness of between 0.3 and 0.7 mm, preferably between 0.4 and 0.6 mm. .
• the filter layer (ii) for capturing gaseous pollutants from a gaseous medium comprises an adsorbent material, for example activated carbon.
• the particulate filter layer (iii) made of nonwoven microfibers is obtained by a "meltblowing" process, more commonly known as “meltblown” (in English).
• this layer comprises microfibers which make it possible to filter smaller particles with respect to the layer of nonwoven fibers (i).
• This can be made of polypropylene.
• the particulate filter layer (ii) made of nonwoven microfibers has a fiber size of between 1 and 8 Dtex.
• the filter layer (ii) may have a thickness of between 0.3 and 1.4 mm.
• a support layer (iv) to facilitate the integration of the particulate filter layer (iii) to the device according to the invention.
• this support layer can then be located between the filter layer (ii) and the microfiber filter layer (iii).
• the method of manufacturing the air purification device of the passenger compartment of a motor vehicle may comprise at least the steps of:
• a layer of nonwoven fibers (i) of the "spunbond" type can be provided in the form of a coil which is unwound and immersed in a bath containing the composition according to the invention.
• This step consists of impregnating the nonwoven fiber layer (i) with the composition according to the invention.
• Such impregnation of the composition on the layer of nonwoven fibers (i) of the "spunbond” type can be carried out according to techniques well known to those skilled in the art, in particular those mentioned above.
• this layer (i) is applied, preferably by gluing, to the filtering layer (ii) intended to capture gaseous pollutants from a gaseous medium which is optionally itself applied, preferably by gluing, to a support layer, for example made of polyester or polypropylene.
• a calendering step can be used to assemble the layers to each other to allow a good maintenance of the multi-layer structure.
• the particulate filter layer (ni) made of non-woven microfibers can then be applied by calendering to the carrier layer, which allows the filter layer (ii) for capturing gaseous pollutants from a gaseous medium to be bonded together and the layer particulate filter (iii).
• this assembly can also be performed in the absence of the support layer.
• the particulate filter layer (iii) is directly applied to the filter layer (ii) for capturing pollutant gases from a gaseous medium.
• a composition according to a first embodiment is obtained by mixing 67.275% by weight of water with 32.000% by weight of tannic acid, 0.600% by weight of 3-glycidopropyltrialkyloxysilane, 0.100% by weight of sodium benzoate and 0.025% by weight. weight of an anti-foam agent.
• Example 2 Coating
• a spunbond nonwoven fiber layer (PET core and polyamide body) is impregnated with the composition described in Example 1 by application of a pad impregnation method ( Padding, in English).
• the spunbond-type non-woven fiber layer comprising the anti-allergenic coating obtained in Example 2 is bonded to a filtering layer intended to capture the harmful gases originating from a gaseous medium, which is itself applied by gluing on a particulate filtering layer made of non-woven microfibres of "meltblown" type.
• a calendering step of this multi-layer system provides a layered structure in which all layers are sufficiently held together.
• This multilayer structure is then drawn accordion-shaped to increase the contact area between the different filter layers and the air to be treated.
• Such a device is a combined filter that has an anti-allergenic property and is intended to be buried in the passenger compartment of a motor vehicle in order to purify the air entering the air conditioning system.
• the combined filter described in Example 3 was subjected to the ELISA test, the result of which indicates that the filter has an efficiency of 50%.

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• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Dispersion Chemistry (AREA)
• Plant Pathology (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Filtering Materials (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

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• 2017
  • 2017-09-22 CN CN201780058350.5A patent/CN109790400B/zh active Active
  • 2017-09-22 WO PCT/EP2017/074115 patent/WO2018055127A1/fr unknown
  • 2017-09-22 US US16/335,139 patent/US11952510B2/en active Active
  • 2017-09-22 EP EP17772044.8A patent/EP3515996A1/de active Pending

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