Abstract: An aim of the prevention invention is to provide a water dispersion type acryl-based pressure-sensitive adhesive composition for re-peeling, which can prevent electrification of an adherend at the time of peeling (peeling antistatic properties) and which can form a pressure-sensitive adhesive layer excellent in adherability and re-peelable properties, and also to provide a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition. The re-peelable water dispersion type acryl-based pressure-sensitive adhesive composition of the present invention contains an acrylic emulsion-based polymer composed of a (meth)acrylic acid alkyl ester and a carboxyl-containing unsaturated monomer as raw material monomers, a perfluoroalkyl-containing oligomer, and an ionic compound.

Abstract: An object of the invention to provide a water-dispersible acrylic pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer that can prevent static build-up on adherends when peeled off (antistatic properties) and is superior not only in removability and the ability to prevent an increase in peel strength (adhesive strength) over time but also in less-staining properties on adherends and, especially, the ability to prevent white staining on adherends in a high-humidity environment (the ability to prevent white staining). The invention is directed to a removable water-dispersible acrylic pressure-sensitive adhesive composition, including: an acrylic emulsion polymer including units derived from raw material monomers including (i) 70 to 99.5% by weight of an alkyl(meth)acrylate and (ii) 0.5 to 10% by weight of a carboxyl group-containing unsaturated monomer; a non-water-soluble crosslinking agent; and an ionic compound.

Abstract: Provided is a removable water-dispersible acrylic pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer that is superior in antistatic properties (resistance to peeling-induced static build-up), removability, adhesion (adhesive properties), and the ability to prevent an increase in peel strength (adhesive strength) over time and also superior in less-staining properties on adherends, particularly, the ability to prevent white staining on adherends in a high-humidity environment. Also provided is a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer made from such a pressure-sensitive adhesive composition. The removable water-dispersible acrylic pressure-sensitive adhesive composition contains an acrylic emulsion polymer including units derived from raw material monomers including at least (A) an alkyl (meth)acrylate and (B) 0.

Abstract: Provided is a water-dispersible acrylic pressure-sensitive adhesive composition which can form a pressure-sensitive adhesive layer excellent in antistatic property, repeeling property (light peeling property), and appearance property. The repeelable water-dispersible acrylic pressure-sensitive adhesive composition of the present invention contains an acrylic emulsion-based polymer composed of 70 to 99.5% by weight of a (meth)acrylic acid alkyl ester and 0.5 to 10% by weight of a carboxyl group-containing unsaturated monomer as monomer components, a crosslinking agent, an ionic compound, and a nonionic surfactant with an HLB value of 6 or more.

Abstract: Provided is a water-dispersible acrylic pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer that can prevent static build-up at the time of peeling (antistatic properties), is superior in removability, in the ability to prevent an increase in peel strength (adhesive strength) over time among the adhesive properties, as well as in appearance properties (decrease of appearance defects due to dents or the like), and also in less-staining properties on adherends, particularly, in the ability to prevent white staining on adherends in high-humidity environments (the ability to prevent white staining).

Abstract: Provided is a water-dispersible acrylic pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer that is superior in adhesive properties, antistatic properties, removability, the ability to prevent an increase in peel strength (adhesive strength) over time, and superior in less-staining properties on adherends, particularly, in the ability to prevent white staining on adherends in a high-humidity environment (the ability to prevent white staining), and also superior in appearance properties. The invention is directed to a water-dispersible acrylic pressure-sensitive adhesive composition, including: an acrylic emulsion polymer including 70 to 99.5% by weight of a monomer unit derived from an alkyl (meth)acrylate and 0.

Abstract: Provided is a removable water-dispersible acrylic pressure-sensitive adhesive composition with which it is possible to form a pressure-sensitive adhesive layer that has excellent antistatic properties, adhesive properties, removability, removal stability, and the ability to prevent an increase in adhesive strength over time, less-staining properties on adherends, especially, the ability to prevent white staining on adherends in a high-humidity environment (the ability to prevent white staining), and appearance properties. The present invention is directed to a removable water-dispersible acrylic pressure-sensitive adhesive composition, including: an acrylic emulsion polymer including 70 to 99.5% by weight of a monomer unit derived from an alkyl(meth)acrylate and 0.5 to 10% by weight of a monomer unit derived from a carboxyl group-containing unsaturated monomer; an ionic compound; and a polyether antifoamer represented by formula (I) below.

Abstract: The present invention provides an acrylic water-dispersible pressure-sensitive adhesive composition that can prepare a removable adhesive layer having low contamination of an adherent. The acrylic water-dispersible pressure-sensitive removable adhesive composition according to the present invention comprises an acrylic emulsion polymer (A) comprising an alkyl (meth)acrylate ester and a carboxyl group-containing unsaturated monomer as essential raw material constitutive monomers and prepared by polymerization with a reactive surfactant containing no oxyalkylene group.

Abstract: Disclosed is a pressure-sensitive adhesive sheet having a transparent film substrate and, on at least one side thereof, an acrylic pressure-sensitive adhesive layer. The transparent film substrate has a top coat layer having a specific configuration with an average thickness and a thickness variation being controlled. The acrylic pressure-sensitive adhesive layer is formed from a water-dispersible acrylic pressure-sensitive adhesive composition. The composition contains, as components, an acrylic emulsion polymer derived from constitutive monomers in a specific formulation; and a polypropylene glycol (PPG)/polyethylene glycol (PEG) block copolymer having a specific structure, or a derivative of the copolymer. The pressure-sensitive adhesive sheet is found to be highly resistant to scratches and static electrification and to have superior visual quality and satisfactory resistance to adhesive strength increase.

Abstract: The pressure-sensitive adhesive sheet includes a transparent film substrate; and, on at least one side thereof, an acrylic pressure-sensitive adhesive layer. The transparent film substrate includes a base layer including a resinous material and a top coat layer on a first face of the base layer. The top coat layer is formed from a polythiophene, an acrylic resin, and a melamine crosslinking agent and has an average thickness Dave of 2 to 50 nm and a thickness variation ?D of 40% or less. The acrylic pressure-sensitive adhesive layer is formed from a water-dispersible removable acrylic pressure-sensitive adhesive composition including an acrylic emulsion polymer.

Abstract: Disclosed is a pressure-sensitive adhesive sheet that has a transparent film substrate and, on at least one side thereof, an acrylic pressure-sensitive adhesive layer. The transparent film substrate has a top coat layer having a specific configuration with an average thickness and a thickness variation being controlled. The acrylic pressure-sensitive adhesive layer is formed from a water-dispersible acrylic pressure-sensitive adhesive composition. The composition includes, as components, an acrylic emulsion polymer derived from constitutive monomers in a specific formulation; a polyether compound having a specific structure; and a specific acetylenic diol. The pressure-sensitive adhesive sheet is found to be highly resistant to scratches and static electrification, to have superior visual quality and satisfactory resistance to adhesive strength increase, and to less cause stains.

Abstract: An aim of the prevention invention is to provide a water dispersion type acryl-based pressure-sensitive adhesive composition for re-peeling, which can prevent electrification of an adherend at the time of peeling (peeling antistatic properties) and which can form a pressure-sensitive adhesive layer excellent in adherability and re-peelable properties, and also to provide a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition. The re-peelable water dispersion type acryl-based pressure-sensitive adhesive composition of the present invention contains an acrylic emulsion-based polymer composed of a (meth)acrylic acid alkyl ester and a carboxyl-containing unsaturated monomer as raw material monomers, a perfluoroalkyl-containing oligomer, and an ionic compound.

Abstract: Provided is a water-dispersible acrylic pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer which is resistant to increase in adhesive strength with time, has a good appearance, and less stains an adherend. The water-dispersible acrylic pressure-sensitive adhesive composition includes an acrylic emulsion polymer; and a water-insoluble crosslinking agent having two or more carboxyl-reactive functional groups per molecule. The acrylic emulsion polymer is formed from constitutive monomers essentially including a (meth)acrylic alkyl ester (A), a carboxyl-containing unsaturated monomer (B), and at least one monomer (C) selected from methyl methacrylate, vinyl acetate, and diethylacrylamide and has a solvent-insoluble content of 70 percent by weight or more. When the acrylic pressure-sensitive adhesive composition is applied so as to have a dry thickness of 50 ?m, dried at 120° C. for 2 minutes, and aged at 50° C.

Abstract: Provided is a water-dispersible acrylic pressure-sensitive adhesive composition capable of forming a removable pressure-sensitive adhesive layer which has satisfactory resistance to increase in adhesive strength and a good appearance and less causes staining on an adherend. The removable water-dispersible acrylic pressure-sensitive adhesive composition includes an acrylic emulsion polymer (A) formed from constitutive monomers essentially including 70 to 99.5 percent by weight of a (meth)acrylic alkyl ester and 0.5 to 10 percent by weight of a carboxyl-containing unsaturated monomer based on the total amount of the constitutive monomers; a water-insoluble crosslinking agent (B); an acetylenic diol compound (C); and a specific polyether defoaming agent (D). The acetylenic diol compound (C) has an HLB of less than 13, and the polyether defoaming agent (D) has a PO in a content of from 70 to 100 percent by weight and a number-average molecular weight of from 1200 to 4000.

Abstract: Provided are a water-dispersible acrylic pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer which has excellent resistance to increase in adhesive strength and a good appearance and less causes staining; and a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition. The water-dispersible acrylic pressure-sensitive adhesive composition includes an acrylic emulsion polymer (A) formed from constitutive monomers essentially containing 70 to 99.5 percent by weight of a (meth)acrylic alkyl ester and 0.

Abstract: A removable water-dispersible acrylic pressure-sensitive adhesive composition according to the present invention includes an acrylic emulsion polymer (A) including, as essential constitutive monomers, a (meth)acrylic alkyl ester in a content of 70 to 99.5 percent by weight, and a carboxyl-containing unsaturated monomer in a content of 0.5 to 10 percent by weight, each based on the total amount of constitutive monomers; a water-insoluble crosslinking agent (B); an acetylenic diol compound (C); and a compound (D) represented by chemical formula [RaO—(PO)1-(EO)m—(PO)n—Rb]. The acetylenic diol compound (C) has a HLB value of less than 13.

Abstract: A removable water-dispersible acrylic pressure-sensitive adhesive composition according to the present invention includes an acrylic emulsion polymer (A), a water-insoluble crosslinking agent (B), and a carboxylic-acid-containing acrylic polymer (C). The polymer (A) includes a (meth) acrylic alkyl ester and a carboxyl-containing unsaturated monomer as essential constitutive monomers and has a content of the (meth) acrylic alkyl ester of 70 to 99.5 percent by weight and a content of the carboxyl-containing unsaturated monomer of 0.5 to 10 percent by weight, each based on the total amount of constitutive monomers. The polymer (C) includes (meth) acrylic acid as an essential constitutive monomer and has a total content of acrylic acid and methacrylic acid of 11 percent by weight or more based on the total amount of constitutive monomers.