TEXTILE COATING COMPOSITION

Abstract

The present invention relates to an aqueous coating composition for textiles, in particular for the cabin air filter of a motor vehicle, comprising at least one allergen denaturing agent and at least one compatibilizing agent for the at least one allergen denaturing agent.

Claims

1-19. (canceled)

20. Aqueous coating composition comprising: at least one allergen denaturing agent comprising a polyphenols-based compound selected from the group consisting of tannic acid, olive leaf extract consisting of oleuropein, and mixtures thereof, and at least one compatibilising agent of said at least one allergen denaturing agent selected from the group consisting of polyallylamine, poly diallyl dimethyl ammonium chloride, polyether amine epichlorohydrin resin, polyethyleneimine, a polyurethane dispersion, an acrylate dispersion, polyvinyl alcohol, polyvinyl acetate, functional silane, and mixtures thereof.

21. Composition according to claim 20, wherein the functional silane is from the family of organosilanes including organoalkoxysilanes and having the following structure: ##STR00002## where Z represents a vinyl, allyl group or any other doubly bonded group capable of reacting during a radical polymerisation reaction, where R.sub.1, R.sub.2, and R.sub.3 are reactive groups.

22. Composition according to claim 21, wherein R.sub.1, R.sub.2, and R.sub.3 are a methoxy, ethoxy group, other alkoxy, amino, epoxy, ureido, vinyl group, chloride or bromide halogens or esters.

23. Composition according to claim 20, wherein the functional silane is an organosilane.

24. Composition according to claim 23, wherein the organosilane is chosen from the group consisting of 3-glycidopropyltrialkoxysilane, glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, and mixtures thereof.

25. Composition according to claim 20, wherein the functional silane contains an epoxy group.

26. Composition according to claim 25, wherein the functional silan is ?-glycidoxypropyl trimethoxysilane, ?-glycidoxypropylmethyldiethoxysilane, ?-(3,4epoxycyclohexyl)ethyltrimethoxysilane or ?-(3,4-epoxycyclohexyl)ethylmethyldiethoxysilane.

27. Composition according to claim 20, comprising an antifungal agent selected from the group consisting of 1,2-benzisothiazoline-3-one, zinc pyrithione, sodium sorbate, sodium benzoate, and mixtures thereof.

28. Composition according to claim 20, comprising an anti-foaming agent selected from the group consisting of mineral oil, silicone, alcohol, tributyl phosphate, triethyl phosphate, and mixtures thereof.

29. Composition according to claim 20, wherein the mass ratio between the allergen denaturing agent and the compatibilising agent is between 15 and 70.

30. Composition according to claim 29, wherein the mass ratio between the allergen denaturing agent and the compatibilising agent is between 15 and 35.

31. Composition according to claim 20, comprising between 40 and 75% of water, with respect to the total weight of the composition.

32. Composition according to claim 31, comprising 45 and 70% of water, with respect to the total weight of the composition.

33. Composition according to claim 20, comprising between 20 and 45% by weight of allergen denaturing agent, with respect to the total weight of the composition.

34. Composition according to claim 33, comprising between 20 and 35% by weight of allergen denaturing agent, with respect to the total weight of the composition.

35. Article on which the composition according to claim 20 is impregnated.

36. Article according to claim 35, wherein the article is an anti-allergen filter comprising at least one non-woven fibre filter layer on which the composition is impregnated.

37. Article according to claim 36, wherein the anti-allergen filter is a combined cabin filter for a motor vehicle.

38. Article according to claim 36, wherein the non-woven fibre filter layer has a fibre size between 5 and 30 Dtex per filament.

39. Article according to claim 38, wherein the non-woven fibre filter layer has a fibre size between 10 and 20 Dtex per filament.

40. Device for purifying the air of the cabin of a motor vehicle comprising successively: (i) a non-woven fibre layer arranged to confer rigidity to the device, (ii) a filter layer intended to capture gaseous pollutants coming from a gaseous medium and applied on said non-woven fibre layer, and (iii) a particle filter layer made of non-woven microfibres, applied on said filter layer intended to capture gaseous pollutants coming from a gaseous medium, said non-woven fibre layer (i) being impregnated with a composition according to claim 20.

41. Device according to claim 40, further comprising a support layer (iv), said filter layer (ii) intended to capture gaseous pollutants coming from a gaseous medium and said particle filter layer (iii) being mutually connected to one another by way of said support layer (iv).

42. The device of claim 40, made by the method comprising steps of: providing the non-woven fibre layer (i), impregnating the composition on said non-woven fibre filter layer (i), mounting a multilayer structure that successively comprises said non-woven fibre layer (i) and the filter layer (ii) intended to capture the gaseous pollutants coming from the gaseous medium, and applying the multilayer structure on the particle filter layer (iii) made of non-woven microfibers.

Description

EXAMPLE 1COMPOSITION

[0121] 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 of an anti-foaming agent.

EXAMPLE 2COATING

[0122] According to a second embodiment, a non-woven fibre layer of the spunbond type (core made of PET and body made from polyamide) is impregnated with the composition included in the example 1 by application of a method of impregnation via padding.

EXAMPLE 3PLEATED COMBINED FILTER

[0123] According to a third embodiment, the non-woven fibre layer of the spunbond type comprising the anti-allergen coating obtained in the example 2 is glued on a filter layer intended to capture the harmful gases coming from a gaseous medium, which itself is applied by gluing on a particle filter layer made of non-woven microfibres of the meltblown type.

[0124] A step of calendering of this multilayer system makes it possible to provide a stratified structure wherein all of the layers are sufficiently maintained to one another.

[0125] This multilayer structure is then pleated in the form of an accordion to increase the contact surface between the various filter layers and the air to be treated.

[0126] Such a device is a combined filter that has an anti-allergen property and is intended to be fitted in the cabin of a motor vehicle in order to purify the air entering the air-conditioning system.

EXAMPLE 4ELISA TEST

[0127] According to a fourth embodiment, the combined filter included in the example 3 was subjected to the ELISA test the result of which indicates that the filter has an efficacy of 50%.

[0128] It is of course understood that the present invention is in no way limited to the embodiments described hereinabove and that many modifications can be made thereto without leaving the scope of the appended claims.