×

PRESSURE-SENSITIVE ADHESIVE COMPOSITION FOR OPTICAL FILMS AND PRESSURE-SENSITIVE ADHESION TYPE OPTICAL FILM

  • US 20130079468A1
  • Filed: 06/03/2011
  • Published: 03/28/2013
  • Est. Priority Date: 06/04/2010
  • Status: Active Grant
First Claim
Patent Images

1. A pressure-sensitive adhesive composition comprising:

  • (I) an acrylic diblock copolymer of formula (1);


    A-B 



    (1),wherein;

    A is a methacrylic acid alkyl ester polymer block; and

    B is an acrylic acid alkyl ester polymer block,wherein the content of the polymer block B is 10 to 55% by mass, based on a total mass of the acrylic diblock copolymer (I), andwherein the acrylic diblock copolymer (I) has a weight-average molecular weight (Mw) in a range from 9,000 to 300,000, and a molecular weight distribution (Mw/Mn) in a range from 1.0 to 1.5; and

    (II) an acrylic triblock copolymer of formula (2);


    C1-D-C2 



    (2),wherein;

    C1 and C2 are each independently a methacrylic acid alkyl ester polymer block having a glass transition temperature of not lower than 100°

    C.; and

    D is an acrylic acid alkyl ester polymer block having a glass transition temperature of not higher than −

    20°

    C.,wherein the content of the polymer block D is 82 to 95% by mass, based on a total mass of the acrylic triblock copolymer (II), andwherein the acrylic triblock copolymer (I) has a weight-average molecular weight (Mw) in a range from 50,000 to 300,000, and a molecular weight distribution (Mw/Mn) in a range from 1.0 to 1.5,wherein a mass ratio of the acrylic diblock copolymer (I) to the acrylic triblock copolymer (II), (I)/(II), is in the range of 70/30 to 20/80.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×