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. Aqueous coating composition comprising, with respect to the total weight of the composition: between 20% and 45% by weight of 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 which is ?-(3,4-epoxycyclohexyl)ethyltrimethoxysilane or ?-(3,4-epoxycyclohexyl)ethylmethyldiethoxysilane or an organosilane chosen from the group consisting of 3-glycidopropyltrialkoxysilane, glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, and mixtures thereof; and between 40% and 75% by weight of water; wherein the mass ratio between the allergen denaturing agent and the compatibilising agent is between 15 and 70.

2. The composition according to claim 1, wherein the functional silane is ?-glycidoxypropyl trimethoxysilane, ?-glycidoxypropylmethyldiethoxysilane, ?-(3,4epoxycyclohexyl)ethyltrimethoxysilane or ?-(3,4-epoxycyclohexyl)ethylmethyldiethoxysilane.

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

4. The composition according to claim 1, further comprising an anti-foaming agent selected from the group consisting of mineral oil, silicone, alcohol, tributyl phosphate, triethyl phosphate, and mixtures thereof.

5. The composition according to claim 1, wherein the mass ratio between the allergen denaturing agent and the compatibilising agent is between 15 and 35.

6. The composition according to claim 1, comprising 45 and 70% of water, with respect to the total weight of the composition.

7. The composition according to claim 1, comprising between 20 and 35% by weight of allergen denaturing agent, with respect to the total weight of the composition.

8. Article on which the composition according to claim 1 is impregnated.

9. The article according to claim 8, wherein the article is an anti-allergen filter comprising at least one non-woven fibre filter layer on which the composition is impregnated.

10. The article according to claim 9, wherein the anti-allergen filter is a combined cabin filter for a motor vehicle.

11. The article according to claim 9, wherein the non-woven fibre filter layer has a fibre size between 5 and 30 Dtex per filament.

12. The article according to claim 11, wherein the non-woven fibre filter layer has a fibre size between 10 and 20 Dtex per filament.

13. 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 1.

14. The device according to claim 13, 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).

15. The device of claim 13, 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

(1) 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

(2) 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

(3) 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.

(4) 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.

(5) 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.

(6) 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

(7) 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%.

(8) 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.