Abstract: An ultraviolet curable resin composition having: a monomer and/or an oligomer having a polymerizable unsaturated double bond; a photopolymerization initiator; a polymerization inhibitor; and an acid having an acid dissociation constant (pKa1) in pure water of 4.0 or less.

Abstract: An ultraviolet curable resin composition containing: a monomer and/or an oligomer having a polymerizable unsaturated double bond; a photopolymerization initiator; and an acid having an acid dissociation constant (pKa1) in pure water of 4.0 or less.

Abstract: Provided is an adhesive tape having a base material layer and an adhesive layer disposed on the base material layer, wherein the adhesive layer contains a radical photoinitiator and polymer A having polymerizable carbon double bonds, and difference |R0-R1| between contact angle R0 of silicon wafer surface with respect to water and contact angle R1 of the silicon wafer surface with respect to water after the adhesive layer is attached to the silicon wafer, left to stand for 24 hours, then irradiated with ultraviolet ray, and peeled, is 20° or less.

Abstract: Provided is an adhesive tape having a base material layer and an adhesive layer disposed on the base material layer, wherein the adhesive layer contains a radical photoinitiator and polymer A having polymerizable carbon double bonds, a tensile modulus of elasticity of the adhesive layer after ultraviolet irradiation is 400 MPa or less, and an elongation at break of the adhesive layer after ultraviolet irradiation is 16% or more.

Abstract: A sheet for processing a wafer, including a substrate sheet that comes into contact with a main surface of the wafer, wherein the substrate sheet has an exponential coefficient in an exponential trendline for storage modulus E?30-80 at 30° C. to 80° C. of ?0.035 to ?0.070.

Abstract: An adhesive tape has superior mechanical properties, and can suppress occurrence of cracks after being exposed to high temperature conditions for a long period of time. The adhesive tape includes a substrate and an adhesive layer formed on one side of the substrate; wherein the substrate is made of a resin composition including 40 to 65 parts by mass of high boiling point plasticizer and 5 to 15 parts by mass of antimony trioxide with respect to 100 parts by mass of polyvinyl chloride resin.

Abstract: An adhesive sheet capable of bonding adhesive layers together at normal temperatures, with little stickiness of the adhesive layers due to a plasticizer seeping out from a substrate providing a protective material using the adhesive sheet and a wire harness. An adhesive sheet including: a substrate containing 20-100 parts by mass of a polyester-based plasticizer to 100 parts by mass of a vinyl halide-based resin; a primer layer; adhesive layers included amount of a tackifier is 0-250 parts by mass and the inorganic microparticles is 0-250 parts by mass to 100 parts by mass of an elastomer, and a total value of the included amounts of the tackifier and the inorganic microparticles is 0-350 parts by mass; wherein the adhesive layers probe tack of 7 N/cm2 or less with ASTM D 2979, and the adhesive force between the adhesive layers width of 15 mm is 1.5 N or more.

Abstract: The substrate for adhesive tape is thin in thickness and can also suppress repelling of a water-borne primer when the primer is being coated. The substrate for adhesive tape includes 25 to 75 parts by mass of a plasticizer and 5 to 40 parts by mass of an inorganic filler with respect to 100 parts by mass of polyvinyl chloride resin having a mean degree of polymerization of 1200 to 1800; wherein the inorganic filler has a mean particle size of 0.05 to 0.8 ?m; and the substrate has a thickness of 40 to 80 ?m.

Abstract: An adhesive sheet including a substrate and adhesive layers that are arranged on one surface of the substrate with a primer layer being interposed therebetween, wherein the adhesive layers include a natural rubber and a tackifier, the adhesive sheet has a volume resistivity of 1×1010? cm or more and a tensile modulus at 100% elongation of 50 MPa or less as determined in accordance with JIS K 6251, the adhesive layers have a probe tack of 10N/cm2 or less as determined in accordance with ASTM D 2979, the adhesive force between the adhesive layers having a width of 15 mm is 1.5 N or more, and the adhesive force between the substrate and the adhesive layers having a width of 15 mm is 1.5 N or less.

Abstract: An object of the present invention is to provide a primer composition for application between the base film and the adhesive layer of an adhesive tape that can improve the adhesion between the base film and the adhesive layer of the adhesive tape and an adhesive tape prepared by using the primer composition. A primer composition, comprising 100 parts by mass (as solid matter) of a graft polymer of a natural rubber graft-polymerized with 15 to 65 mass % of methyl methacrylate and 25 to 300 parts by mass of a carboxyl group-modified acrylonitrile butadiene rubber.

Abstract: An object of the present invention is to provide a primer composition for application between the base film and the adhesive layer of an adhesive tape that can improve the adhesion between the base film and the adhesive layer of the adhesive tape and an adhesive tape prepared by using the primer composition. A primer composition, comprising 100 parts by mass (as solid matter) of a graft polymer of a natural rubber graft-polymerized with 15 to 65 mass % of methyl methacrylate and 25 to 300 parts by mass of a carboxyl group-modified acrylonitrile butadiene rubber.

Abstract: An object of the invention is to provide a primer composition for application between the base film and the adhesive layer of an adhesive tape that can improve the adhesion between the base film and the adhesive layer of the adhesive tape and an adhesive tape prepared by using the primer composition. A primer composition, comprising 100 parts by mass (as solid matter) of a graft polymer of a natural rubber graft-polymerized with 15 to 65 mass % of methyl methacrylate and 25 to 300 parts by mass of a carboxyl group-modified acrylonitrile butadiene rubber.

Abstract: Provided is a polyvinylidene fluoride resin adhesive film that restores the transparency of a damaged transparent base material by smoothing the surface irregularity generated by damaging and has surface-protecting properties superior in weather fastness and stain resistance. A polyvinylidene fluoride resin adhesive film, comprising a resin composition layer containing a polyvinylidene fluoride resin in an amount of 0 to 50 mass % and a polymethacrylic ester resin in an amount of 100 to 50 mass % (100% in total) and additionally an ultraviolet absorbent in an amount of 0.1 to 15 mass % with respect to the resin components therein, a resin composition layer laminated on one face thereof, containing a polyvinylidene fluoride resin in an amount of 100 to 50 mass % and a polymethacrylic ester resin in an amount of 0 to 50 mass % (100% in total) and an acrylic adhesive layer formed on the other face thereof.

Abstract: An object of the present invention is to provide a primer composition for application between the base film and the adhesive layer of an adhesive tape that can improve the adhesion between the base film and the adhesive layer of the adhesive tape and an adhesive tape prepared by using the primer composition. A primer composition, comprising 100 parts by mass (as solid matter) of a graft polymer of a natural rubber graft-polymerized with 15 to 65 mass % of methyl methacrylate and 25 to 300 parts by mass of a carboxyl group-modified acrylonitrile butadiene rubber.

Abstract: Provided are a tape substrate having excellent oil resistance as well as balanced properties of flexibility, a hand cutting property and heat resistance, and an adhesive tape using the tape substrate. The tape substrate contains an ethylene-aromatic vinyl compound copolymer with an isotactic stereoregularity. Furthermore, the ethylene-aromatic vinyl compound copolymer is one having an alternating structure of ethylene and the aromatic vinyl compound represented by the formula (1) below, and an isotactic diad index m of Ph (an aromatic group) in the structure of the copolymer being more than 0.75: where Ph is an aromatic group and xa is the number of repeating units and an integer of at least 2.