摘要:
This invention provides a pressure-sensitive adhesive composition that exhibits excellent pressure-sensitive adhesive properties after crosslinking treatment, does not cause lifting or lifting upon heat treatment or treatment under high-humidity conditions particularly even in the case of a pressure-sensitive adhesive layer having a reduced layer thickness, and has excellent durability. A pressure-sensitive adhesive layer formed using the pressure-sensitive adhesive composition, and a process for producing the same are also provided. Further, an optical member with pressure-sensitive adhesive comprising the pressure-sensitive adhesive layer and an image display using the same are provided. The pressure-sensitive adhesive composition is characterized by comprising 100 parts by weight of an (meth)acrylic polymer and 0.02 to 2 parts by weight of a peroxide, and 0.02 to 2 parts by weight of an isocyanate crosslinking agent, the (meth)acrylic polymer comprising as monomer units 50 to 98% by weight of an (meth)acrylic monomer represented by general formula CH2═C(R1)COOR2, wherein R1 represents hydrogen or a methyl group and R2 represents an alkyl group having 2 to 14 carbon atoms, and 0.1 to 35% by weight of a nitrogen-containing monomer.
摘要:
An object of the present invention is to provide a pressure sensitive adhesive composition for an optical member, which is excellent in coating property because of low viscosity, can reduce an amount of an organic solvent used, and can form a pressure sensitive adhesive layer excellent in durability and having high surface uniformity. The present invention relates to a pressure sensitive adhesive composition for an optical member, which comprises a (meth)acrylic polymer, a C6 to C9 hydrocarbon-based solvent (A), and a high-boiling highly solubilizing solvent (B) having a boiling point higher than that of the above hydrocarbon-based solvent and having a higher ability to solubilize the (meth)acrylic polymer than that of the above hydrocarbon-based solvent, wherein a content of the hydrocarbon-based solvent (A) is 20 to 60 wt % based on the total amount of the solvents, and a ratio of the content (wt %) of the hydrocarbon-based solvent (A) to the content (wt %) of the high-boiling highly solubilizing solvent (B) (high-boiling highly solubilizing solvent (B)/hydrocarbon-based solvent (A)) is 0.05 to 4.
摘要:
Provided are a pressure sensitive adhesive composition for optical members and a pressure sensitive adhesive composition for optical members. The pressure sensitive adhesive composition for optical members according to the present invention comprises 100 parts by weight of an acrylic polymer (A) having a weight-average molecular weight of 500,000 or more, containing at least 50 wt % alkyl (meth)acrylate having an alkyl group with 5 or more carbon atoms and 0.2 to 2 wt % unsaturated carboxylic acid as the monomer unit, 0.1 to 4 parts by weight of an acrylic polymer (B) having a weight-average molecular weight of 2,000 to 50,000, containing at least 70 wt % alkyl (meth)acrylate and 1 to 7 wt % unsaturated carboxylic acid as the monomer unit and having a higher carboxylic acid equivalent than that of the acrylic polymer (A), 0.01 to 1 part by weight of a silane coupling agent, and a crosslinking agent.
摘要:
To provide a pressure-sensitive adhesive sheet, which is used in processing an article such as a semiconductor wafer, the pressure-sensitive adhesive sheet has a base, an intermediate layer and a pressure-sensitive adhesive layer in this order, wherein the intermediate layer has an elastic modulus in tension at 23° C. of 10 MPa or more and 100 Mpa or less, the intermediate layer includes an acrylic-based polymer obtained by polymerization of a mixture containing 70 to 99 parts by weight of a (meth)acrylate monomer and 1 to 30 parts by weight of an unsaturated carboxylic acid based on 100 parts by weight of total monomers, and the base includes at least one film having an elastic modulus in tension at 23° C. of 0.6 GPa or more.
摘要:
The present invention provides a pressure sensitive adhesive composition for optical members, which is excellent in durability, re-releasability and stress relaxation, as well as a pressure sensitive adhesive composition for optical members, which hardly increases adhesion after storage for a long time and does not leave a residual adhesive on glass upon disposal or repair. The pressure sensitive adhesive composition for optical members according to the present invention comprises 100 parts by weight of an acrylic polymer (A) having a weight-average molecular weight of 500,000 or more, containing at least 50 wt % alkyl (meth)acrylate having an alkyl group with 5 or more carbon atoms and 0.2 to 2 wt % unsaturated carboxylic acid as the monomer unit, 0.1 to 4 parts by weight of an acrylic polymer (B) having a weight-average molecular weight of 2,000 to 50,000, containing at least 70 wt % alkyl(meth)acrylate and 1 to 7 wt % unsaturated carboxylic acid as the monomer unit and having a higher carboxylic acid equivalent than that of the acrylic polymer (A), 0.01 to 1 part by weight of a silane coupling agent, and a crosslinking agent.
摘要:
An optical pressure-sensitive adhesive that is for use in pressure-sensitive adhesive attached optical films, includes an acrylic copolymer and is less likely to cause display unevenness in the peripheral portion of a display screen. An optical pressure-sensitive adhesive, comprising: an acrylic copolymer containing alkyl (meth)acrylate (a1) and N-(2-hydroxyethyl)(meth)acrylamide (a2) as a monomer unit.
摘要:
To provide a pellicle having a an adhesive, wherein adhesive residue is decreased at the time of peeling the pellicle from a mask after lithographic exposure and outgassing from the adhesive is suppressed The pellicle according to the present invention is a pellicle comprising a pellicle frame, a tensioned pellicle film placed on one end surface of the pellicle frame and an adhesive applied to the other end surface thereof, in which the adhesive contains a (meth)acrylic alkyl ester copolymer and a silane compound, and the (meth)acrylic alkyl ester copolymer is a copolymer of a (meth)acrylic alkyl ester having an alkyl group of 4 to 14 carbon atoms and a monomer having a functional group reactive to at least either one of an isocyanate group or an epoxy group.
摘要:
A pressure-sensitive adhesive optical film of the present invention comprises: an optical film comprising a transparent base film and a discotic liquid crystal layer on one side of the transparent base film; and a pressure-sensitive adhesive layer that is provided on the discotic liquid crystal layer, wherein the pressure-sensitive adhesive layer is made from a pressure-sensitive adhesive containing an acrylic polymer comprising an alkyl(meth)acrylate (a1) and a ring structure-containing (meth)acrylate (a2) as monomer units and having a weight average molecular weight of 1,000,000 to 3,000,000, and a crosslinking agent. The pressure-sensitive adhesive optical film has durability and can be prevented from causing display unevenness in a peripheral portion of a display screen.
摘要:
There is provided a method for manufacturing a liquid crystal panel comprises the steps of:(Step A1) manufacturing a polarizing film including a laminate composed of a first base film and a polarizing thin layer, the step including: applying a vinyl alcohol-based polymer on a surface of the first base film to form a vinyl alcohol-based polymer thin layer; and wet dyeing the vinyl alcohol-based polymer thin layer after stretching the thin layer together with the first base film to obtain a polarizing thin layer, and(Step B1) adhering the polarizing film without an adhesion layer during storage and transportation at least to one surface of a liquid crystal cell through an adhesion layer in a liquid crystal panel manufacturing process.
摘要:
To provide a pressure-sensitive adhesive sheet used during processing articles such as semiconductor wafers and laminate sheet used for such a pressure-sensitive adhesive sheet, which does not contaminate or break the semiconductor wafers during the processing and can minimize the curl of the articles due to residual stress of the pressure-sensitive adhesive sheet, a multi-layer sheet includes a composite film containing a urethane polymer and a vinyl-based polymer as effective components and a first film made of a material different from that of the composite film, wherein the urethane polymer is formed from a polyolefin diol and a polyisocyanate. A pressure-sensitive adhesive sheet is obtained by providing a pressure-sensitive adhesive layer on at least one side of the multi-layer sheet.