Adhesive tape and adhesive composition
AssigneeSekisui Chemical Co., Ltd.
InventorsYudai OGATA, Nagisa TSUJI, Akira SHIMOJITOSHO
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Abstract
The present invention aims to provide an adhesive tape achieving both excellent adhesion and excellent holding power and an adhesive composition used for the adhesive tape. Provided is an adhesive tape including an adhesive layer, the adhesive layer having a shear storage modulus at 100° C. of 4.0×104 Pa or greater and 1.0×106 Pa or less as measured using a dynamic viscoelasticity measuring device at a measurement frequency of 1 Hz, and an elongation at break at 25° C. of 800% or greater as measured using a tensile tester at a tensile speed of 300 mm/min.
Claims27
An adhesive tape comprising an adhesive layer, the adhesive layer having a shear storage modulus at 100° C. of 4.0×104 Pa or greater and 1.0×106 Pa or less as measured using a dynamic viscoelasticity measuring device at a measurement frequency of 1 Hz, and an elongation at break at 25° C. of 800% or greater as measured using a tensile tester at a tensile speed of 300 mm/min.
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An adhesive composition comprising an acrylic copolymer containing a structure derived from an alkyl (meth)acrylate and a structure derived from an olefinic polymer having a polymerizable unsaturated double bond at an end,
- the acrylic copolymer having glass transition temperatures in a range from −100° C. to 200° C. in differential scanning calorimetry,
- all the glass transition temperatures being −20° C. or lower.
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Dependencies are inferred from the claim text.