Vent filter imparted with oil repellency

A filter and oil-repellent technology, applied in the field of breathable filters, can solve the problem of insufficient prevention of intrusion, and achieve the effect of excellent oil-repellent properties

Inactive Publication Date: 2015-05-06
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if a stretched porous PTFE membrane with excellent water repellency is used as a breathable filter, it cannot sufficiently prevent the intrusion of liquids with low surface tension

Method used

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  • Vent filter imparted with oil repellency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] As the polytetrafluoroethylene porous membrane, a fluorine-containing resin porous film "TEMISH (registered trademark) NTF1131" (thickness: 0.1 mm) manufactured by Nitto Denko Co., Ltd. was used. Diluted with a diluent (“FS Thinner” manufactured by Shin-Etsu Chemical Co., Ltd.) so as to contain 95 mol% of CH 2 =CHCOOCH 2 CH 2 C 6 f 13 As a monomer containing a straight-chain fluorine-containing hydrocarbon group and containing 5 mole % of 3-methacryloxypropyltriethoxysilane as a mixture of crosslinkable monomers is 3.0% by weight, Al chelate cross The oil-repellent treatment liquid was prepared by using a coupling agent ("DF-40" manufactured by Shin-Etsu Chemical Co., Ltd.) at 0.15% by weight. This oil-repellent treatment liquid was kept at 20° C., and NTF1131 was immersed in this oil-repellent treatment liquid for about 3 seconds while being fixed to a 20 cm square frame so as not to shrink. It was then left at 100°C for about 1 hour, thereby drying the solvent an...

Embodiment 2

[0055] Use the general formula CH 2 =C(CH 3 ) COOCH 2 CH 2 C 6 f 13 A gas-permeable filter was obtained in the same manner as in Example 1 except that the straight-chain fluorinated hydrocarbon group-containing monomer was used.

Embodiment 3

[0057] Use the general formula CH 2 =CHCOOCH 2 CH 2 C 8 f 17 A gas-permeable filter was obtained in the same manner as in Example 1 except that the straight-chain fluorinated hydrocarbon group-containing monomer was used.

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Abstract

A vent filter according to the present invention has a surface coated with an oil-repellent agent. The oil-repellent agent comprises a copolymer of a monomer containing a linear fluorinated hydrocarbon group and a crosslinkable monomer. The crosslinkable monomer comprises at least one monomer selected from a monomer containing an alkoxy group, a monomer containing a hydroxy group and a monomer containing a carboxyl group.

Description

technical field [0001] The present invention relates to an air-permeable filter provided with oil repellency. Background technique [0002] Automotive electrical / electronic components such as headlights, rear lights, fog lights, turn signals, motors, various pressure sensors, pressure switches, cameras, video cameras, mobile phones and other information terminals, electric shavers, electric toothbrushes, and outdoor applications In most cases, the housings of various equipment such as lamps are provided with ventilation holes. The main purpose of providing the ventilation hole is to avoid an excessive increase in internal pressure accompanying the temperature rise in the device casing due to the operation of the device by communicating the inside of the device with the outside. In addition, for the purpose of discharging the gas generated during the operation of the battery, vent holes are provided on the battery casing. [0003] In order to prevent the intrusion of water,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/36B01D39/16B32B5/18B32B27/30
CPCB01D67/0088B01D2323/02B01D2239/0421B01D46/0035B01D2279/35B01D2323/30B01D2323/32B01D2323/38B01D2325/22B01D46/543B01D46/62B01D46/0027
Inventor 池山佳树丸冈伸明增田良太小野原明日香
Owner NITTO DENKO CORP
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