Abstract: The invention provides a laminating acrylic thermoplastic polymer composition which is favorably laminated together with a layer including a plasticizer-containing polymer composition while ensuring that the migration of the plasticizer into the acrylic thermoplastic polymer composition layer is small and the resultant laminate attains excellent durability, and also provides a laminate obtained by laminating a layer including the laminating acrylic thermoplastic polymer composition onto one or both sides of a layer including the plasticizer-containing polymer composition. Further, the invention provides a polymer composition which, when the plasticizer-containing polymer described above is a vinyl chloride-based polymer, can keep sufficient adhesive force after being adhered to a layer including such a vinyl chloride-based polymer, and also provides an adhesive product using the composition.

Abstract: A laminate production method is provided which can sufficiently prevent the occurrence of blocking without causing deterioration in the outstanding characteristics of acrylic block copolymers such as adhesive performance, and can also ensure excellent processability during extrusion.

Abstract: A laminate is provided which includes a substrate and a structural body including a base portion and a through hole and which can concurrently satisfy stickiness and releasability and can be released with no or little adhesive residue. The laminate includes a substrate and a structural body disposed on the surface of at least one side of the substrate, the structural body including a base portion and a through hole. The base portion of the structural body includes an acrylic triblock copolymer (I) and no tackifier resins or includes an acrylic triblock copolymer (I) and a tackifier resin in a tackifier resin/(I) mass ratio of not more than 20/100. The acrylic triblock copolymer (I) includes two polymer blocks (A1) and (A2) each including methacrylic acid ester units and one polymer block (B) including acrylic acid ester units represented by the general formula CH2?CH—COOR1 (1) (wherein R1 denotes a C4-C12 organic group).

Abstract: A laminate is provided which includes a structural body including a base portion and a through hole and which can concurrently satisfy operability and stickiness during processes such as fitting, can be released with no or little adhesive residue, and also exhibits excellent adhesion to various adherends, especially metals. The laminate includes a substrate and a structural body disposed on the surface of at least one side of the substrate, the structural body including a base portion and a through hole. The base portion of the structural body includes an acrylic triblock copolymer (I) that includes two polymer blocks (A1) and (A2) each including methacrylic acid ester units and one polymer block (B) including acrylic acid ester units represented by the general formula CH2?CH—COOR1 (1) (wherein R1 denotes a C1-C3 organic group). The acrylic triblock copolymer (I) has an (A1)-(B)-(A2) block structure and a weight average molecular weight of 50,000 to 250,000.

Abstract: Sufficiently antiblock pellets are provided that include an acrylic block copolymer which has a polymer block including methyl acrylate units. A shaped article is provided from the pellets with high productivity while avoiding deterioration in the outstanding characteristics of the acrylic block copolymer. The pellets include an acrylic block copolymer (I) including at least one polymer block (A1) including methacrylic acid ester units, and at least one polymer block (B1) including acrylic acid ester units, and an acrylic polymer (II) containing 35 mass % or more methyl methacrylate units and having a melt flow rate (MFR) measured at 230° C. under 3.8 kg load of not less than 10 g/10 min. The acrylic acid ester units present in the polymer block (B1) of the acrylic block copolymer (I) consist solely of methyl acrylate units and acrylic acid ester (1) units represented by the general formula CH2?CH—COOR1 (1) (wherein R1 represents a C4-C12 organic group).

Abstract: The invention provides a laminating acrylic thermoplastic polymer composition which is favorably laminated together with a layer including a plasticizer-containing polymer composition while ensuring that the migration of the plasticizer into the acrylic thermoplastic polymer composition layer is small and the resultant laminate attains excellent durability, and also provides a laminate obtained by laminating a layer including the laminating acrylic thermoplastic polymer composition onto one or both sides of a layer including the plasticizer-containing polymer composition. Further, the invention provides a polymer composition which, when the plasticizer-containing polymer described above is a vinyl chloride-based polymer, can keep sufficient adhesive force after being adhered to a layer including such a vinyl chloride-based polymer, and also provides an adhesive product using the composition.

Abstract: The invention provides a laminating acrylic thermoplastic polymer composition which is favorably laminated together with a layer including a plasticizer-containing polymer composition while ensuring that the migration of the plasticizer into the acrylic thermoplastic polymer composition layer is small and the resultant laminate attains excellent durability, and also provides a laminate obtained by laminating a layer including the laminating acrylic thermoplastic polymer composition onto one or both sides of a layer including the plasticizer-containing polymer composition. Further, the invention provides a polymer composition which, when the plasticizer-containing polymer described above is a vinyl chloride-based polymer, can keep sufficient adhesive force after being adhered to a layer including such a vinyl chloride-based polymer, and also provides an adhesive product using the composition.

Abstract: Described herein is a pressure-sensitive adhesive composition containing an acrylic block copolymer (I) having a polymer block (A) containing methacrylic acid ester units and a polymer block (B) containing acrylic acid ester units which are derived from an acrylic acid ester (1) represented by the general formula CH2?CH—COOR1 (1) (wherein R1 is an organic group of 4 to 6 carbon atoms) and an acrylic acid ester (2) represented by the general formula CH2?CH—COOR2 (2) (wherein R2 is an organic group of 7 to 12 carbon atoms), the mass ratio (1)/(2) of said acrylic acid ester (1) to said acrylic acid ester (2) being 65/35 to 20/80. The tan ? value of viscoelasticity of the acrylic block copolymer (I), as measured at a frequency of 1 Hz, is 1×10?2 to 1×10?1 in the range of 50 to 100° C.

Abstract: [Object] To provide an acrylic block copolymer which can be used in an adhesive composition to give an excellent adhesive force, cohesive force, holding power, tack, and hot-melt coatability; and also to provide an adhesive composition containing such a block copolymer. [Solution] An acrylic block copolymer (I) contains at least two polymer blocks (A) containing methacrylic acid ester units and at least one polymer block (B) containing acrylic acid ester units, wherein the acrylic block copolymer (I) has structure of blocks (A)-(B)-(A), a weight average molecular weight (Mw) ranging from 30,000 to 100,000 and a melt viscosity of not more than 100,000 mPa·s, the melt viscosity being measured at 100° C. with a Brookfield viscometer.

Abstract: The invention provides adhesive compositions which can be hot-melt processed by being thermally melted at a relatively low temperature and which have excellent adhesion force, holding power and tack, and adhesive products including the adhesive compositions. A hot melt adhesive composition includes an acrylic block copolymer (I) including at least one polymer block (A) including methacrylate ester units, and at least one polymer block (B) including acrylate ester units, wherein the methacrylate ester units constituting the polymer block (A) include at least a methyl methacrylate (a1) unit and a methacrylate ester (a2) unit represented by the general formula CH2?C(CH3)—COOR1 (1) wherein R1 is a C2-16 organic group.

Abstract: The invention provides a laminating acrylic thermoplastic polymer composition which is favorably laminated together with a layer including a plasticizer-containing polymer composition while ensuring that the migration of the plasticizer into the acrylic thermoplastic polymer composition layer is small and the resultant laminate attains excellent durability, and also provides a laminate obtained by laminating a layer including the laminating acrylic thermoplastic polymer composition onto one or both sides of a layer including the plasticizer-containing polymer composition. Further, the invention provides a polymer composition which, when the plasticizer-containing polymer described above is a vinyl chloride-based polymer, can keep sufficient adhesive force after being adhered to a layer including such a vinyl chloride-based polymer, and also provides an adhesive product using the composition.

Abstract: Described herein is a pressure-sensitive adhesive composition containing an acrylic block copolymer (I) having a polymer block (A) containing methacrylic acid ester units and a polymer block (B) containing acrylic acid ester units which are derived from an acrylic acid ester (1) represented by the general formula CH2?CH—COOR1 (1) (wherein R1 is an organic group of 4 to 6 carbon atoms) and an acrylic acid ester (2) represented by the general formula CH2?CH—COOR2 (2) (wherein R2 is an organic group of 7 to 12 carbon atoms), the mass ratio (1)/(2) of said acrylic acid ester (1) to said acrylic acid ester (2) being 65/35 to 20/80. The tan? value of viscoelasticity of the acrylic block copolymer (I), as measured at a frequency of 1 Hz, is 1×10?2 to 1×10?1 in the range of 50 to 100° C.

Abstract: Provided are an adhesive composition suitable for a hot-melt adhesive which has a low tack and which after adhering to an adherend and through heat treatment comes to have sufficient adhesive force; and an adhesive product using the adhesive composition. The hot-melt adhesive composition includes an acrylic block copolymer (I) having at least one polymer block (A) including methacrylic acid ester units and at least one polymer block (B) including acrylic acid ester units, wherein the acrylic acid ester units constituting the polymer block (B) contain an acrylic acid ester (1) represented by CH2?CH—COOR1 (1) (wherein R1 is an organic group having 1 to 3 carbon atoms) and an acrylic acid ester (2) represented by CH2?CH—COOR2 (2) (wherein R2 is an organic group having 4 to 12 carbon atoms), and a mass ratio (1)/(2) of the acrylic acid ester (1) to the acrylic acid ester (2) is 90/10 to 25/75.

Abstract: There are provided a pressure-sensitive adhesive composition which is excellent in durability, whitening resistance, hot-melt processability, pressure-sensitive adhesion properties, holding power at high temperatures, heat resistance, weathering resistance, compatibility with tackifying resins, low-temperature properties and transparency, is excellent also in balance of these properties and rarely suffers adhesion acceleration, and pressure-sensitive adhesive products using the pressure-sensitive adhesive composition.

Abstract: [Object] To provide an acrylic block copolymer which can be used in an adhesive composition to give an excellent adhesive force, cohesive force, holding power, tack, and hot-melt coatability; and also to provide an adhesive composition containing such a block copolymer. [Solution] An acrylic block copolymer (I) contains at least two polymer blocks (A) containing methacrylic acid ester units and at least one polymer block (B) containing acrylic acid ester units, wherein the acrylic block copolymer (I) has structure of blocks (A)-(B)-(A), a weight average molecular weight (Mw) ranging from 30,000 to 100,000 and a melt viscosity of not more than 100,000 mPa·s, the melt viscosity being measured at 100° C. with a Brookfield viscometer.

Abstract: The present invention provides pressure-sensitive adhesive compositions which have excellent adhesion force, cohesion force, tack and holding power, and pressure-sensitive adhesive products including the pressure-sensitive adhesive compositions. The pressure-sensitive adhesive composition includes (i) 100 parts by mass of an acrylic block copolymer (I) including at least one polymer block (A) containing methacrylate ester units and at least one polymer block (B) containing acrylate ester units, the acrylic block copolymer (I) having a weight average molecular weight of 30,000 to 300,000, the acrylate ester units in the polymer block (B) including not less than 80 mass % of units from an acrylate ester (1) represented by the general formula (1): CH2?CH—COOR2 (wherein R2 is an organic group having 7 to 12 carbon atoms); (ii) 1 to 300 parts by mass of a tackifier resin; and (iii) 1 to 200 parts by mass of at least one plasticizer selected from process oils, and organic acid esters and oligomers thereof.

Abstract: An adhesive containing a block copolymer having at least one structure represented by formula: -[A1]-[B/A2]-, where [A1] represents a polymer block composed of a structural unit derived from a methacrylic acid ester (A1), [B/A2] represents a copolymer block composed of a structural unit derived from an acrylic acid ester (B) and a structural unit derived from a methacrylic acid ester (A2), and the copolymer block [B/A2] has a gradient copolymer block section in which a copolymerization ratio of the methacrylic acid ester (A2) continuously increases from a section connected to the polymer block [A1]. The block copolymer has a total content of the structural units derived from the methacrylic acid ester (A1) and the methacrylic acid ester (A2) of 5% to 60% by mass, a weight-average molecular weight (Mw) of 30,000 to 300,000, and a molecular weight distribution (Mw/Mn) of 1.0 to 1.5.

Abstract: Provided are an adhesive composition suitable for a hot-melt adhesive which has a low tack and which after adhering to an adherend and through heat treatment comes to have sufficient adhesive force; and an adhesive product using the adhesive composition. The hot-melt adhesive composition includes an acrylic block copolymer (I) having at least one polymer block (A) including methacrylic acid ester units and at least one polymer block (B) including acrylic acid ester units, wherein the acrylic acid ester units constituting the polymer block (B) contain an acrylic acid ester (1) represented by CH2?CH—COOR1 (1) (wherein R1 is an organic group having 1 to 3 carbon atoms) and an acrylic acid ester (2) represented by CH2?CH—COOR2 (2) (wherein R2 is an organic group having 4 to 12 carbon atoms), and a mass ratio (1)/(2) of the acrylic acid ester (1) to the acrylic acid ester (2) is 90/10 to 25/75.

Abstract: Provided are an acrylic hot-melt adhesive that has both good hot-melt processability and good holding power, that is suitable for applications to a hot-melt coating method in which coating is performed at a low temperature at a high speed, that has good transparency and good weather resistance, and that further has good adhesiveness at low temperatures, and a block copolymer suitable for use in the adhesive.

Abstract: There are provided a pressure-sensitive adhesive composition which is excellent in durability, whitening resistance, hot-melt processability, pressure-sensitive adhesion properties, holding power at high temperatures, heat resistance, weathering resistance, compatibility with tackifying resins, low-temperature properties and transparency, is excellent also in balance of these properties and rarely suffers adhesion acceleration, and pressure-sensitive adhesive products using the pressure-sensitive adhesive composition.