Pressure-sensitive adhesive composition and optical filter

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 133/00 (2006.01) G02B 1/10 (2006.01) G02B 1/11 (2006.01) G02B 5/22 (2006.01)

Patent

CA 2594511

A pressure-sensitive adhesive composition which, when a sample having a copper mesh bonded thereto is subjected to a moisture resistance test, is prevented from discoloring or fading. Also provided is an optical filter having excellent moisture resistance and prevented from discoloring or fading. The pressure-sensitive adhesive composition (first pressure-sensitive adhesive (14)), which is used for bonding a copper mesh (12) to an adherend (antireflection film (11)), comprises an acrylic pressure-sensitive adhesive having an acid value of 7 mg-KOH/g or lower and a dye having neither a hydroxy group nor an amino group. In the pressure-sensitive adhesive composition, the dye preferably is at least one member selected from the group consisting of anthraquinone dyes and porphyrin dyes. The optical filter (10) comprises an adherend (antireflection film (11)) and a copper mesh (12) bonded thereto through the pressure-sensitive adhesive composition (first pressure-sensitive adhesive (14)).

L'invention concerne une composition d'adhésif autocollant laquelle, lorsqu'un échantillon ayant une tresse en fil de cuivre collée à celui-ci est soumis à un test de résistance à l'humidité, ne subit pas d'altération de la couleur ou de diminution de l'intensité de la couleur. L'invention concerne également un filtre optique ayant une excellente résistance à l'humidité et ne subissant pas d'altération de la couleur ou de diminution de l'intensité de la couleur. La composition d'adhésif autocollant (premier adhésif autocollant (14)), laquelle est utilisée pour coller une tresse en fil de cuivre (12) à un support de collage (film antireflet (11)), comprend un adhésif autocollant acrylique ayant un indice d'acidité inférieur ou égal à 7 mg de KOH/g et un colorant n'ayant ni un groupe hydroxy ni un groupe amino. Dans la composition d'adhésif autocollant, le colorant est de préférence au moins un élément sélectionné dans le groupe constitué de colorants de type anthraquinones et de colorants de type porphyrines. Le filtre optique (10) comprend un support de collage (film antireflet (11)) et une tresse en fil de cuivre (12) collée à celui-ci grâce à la composition d'adhésif autocollant (premier adhésif autocollant (14)).

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