Adhesive composition for an optical film

C - Chemistry – Metallurgy – 09 – J

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C09J 153/00 (2006.01) C09J 7/02 (2006.01) C09J 11/06 (2006.01) C09J 133/08 (2006.01) G02B 5/30 (2006.01) G02F 1/1335 (2006.01)

Patent

CA 2741804

A pressure-sensitive adhesive composition for optical film, which comprises an acrylic triblock copolymer (I) and an isocyanate compound. The triblock copolymer (1) is represented by the formula: A1-B-A2, wherein alkyl methacrylate polymer blocks (A1) and (A2) having a Tg of 100°C or higher are bonded to an alkyl acrylate polymer block (B) having a Tg of -20°C or lower. Further, the triblock copolymer (1) has a content of the block (B) of 40 to 95mass%, an Mw of 50,000 to 300,000, and a molecular weight distribution of 1.0 to 1.5, and is free from NCO-reactive functional groups. In the pressure-sensitive adhesive composition, the content of the triblock copolymer (1) is 60mass% or higher, and the content of the isocyanate compound is 0.0015mass% or higher and below 0.35mass% in terms of NCO content, each percentage being relative to the mass of the solid matter contained in the composition.

La présente invention concerne une composition d'adhésif autocollant pour film comprenant un copolymère tribloc acrylique (I) et un composé isocyanate. Le copolymère tribloc acrylique (1) est représenté par la formule: A1-B-A2 dans laquelle des blocs polymères méthacrylate (A1) et (A2) présentant un Tg d'au moins 100°C sont liés à un bloc polymère alkyle-acrylate (B) présentant un Tg maximal de -20°C. De plus, le copolymère tribloc (1), qui présente une teneur en blocs (B) de 40 à 95 % en masse, un Mw de 50.000 à 300.000, et une distribution des poids moléculaires de 1,0 à 1,5, est exempt de groupes fonctionnels réagissant avec NCO. Dans la composition d'adhésif autocollant, la teneur du copolymère tribloc (1) est d'au moins 60 % en masse, alors que la teneur du composé isocyanate est d'au moins 0,0015 % en masse tout en restant en dessous de 0,35% en masse de la teneur en NCO, chaque pourcentage étant relatif à la masse de matière solide contenue dans la composition.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Adhesive composition for an optical film does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adhesive composition for an optical film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adhesive composition for an optical film will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1938210

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.