Abstract:
PROBLEM TO BE SOLVED: To provide a polyolefin-based resin foam excellent in shock absorbability.SOLUTION: A foam according to the present invention is formed by crosslinking a foam composition which contains a 4-methyl-1-pentene-α-olefin copolymer (A) composed of 20-75 mol% of a constitutional unit (A1) derived from 4-methyl-1-pentene and 80-25 mol% of a constitutional unit (A2) derived from a 2-20C α-olefin other than 4-methyl-1-pentene and has a forming rate of 1.1-50 cc/g. The 4-methyl-1-pentene-α-olefin copolymer (A) has intrinsic viscosity [η] of 0.01-5.0 dL/g, Mw/Mn of 1.0-3.5, and a maximum tan δ value of 1.0-3.5.
Abstract:
PROBLEM TO BE SOLVED: To provide a surface protecting film excellent in heat resistance, a low temperature molding property, and a property of being unreeled from a roll.SOLUTION: A 4-methyl-1-pentene copolymer which satisfies the following requirements (i)-(iv) is included in a part of a surface layer (A) of a multi-layer film to solve the problem: (i) a constituting unit derived from 4-methyl-1-pentene is 80-99 mol%, and a constituting unit derived from propylene is 1-20 mol%; (ii) limiting viscosity [η] measured in decalin at 135°C is 0.5-5.0 (dl/g); (iii) a melting point (Tm) measured with a DSC is within a range of 160-240°C; and (iv) the density is 820-850 (kg/m).
Abstract:
PROBLEM TO BE SOLVED: To provide an adhesive which exerts necessary initial adhesive force, and hardly contaminates, when stuck to various adherends, the adherends, and a laminated body having a substrate layer and an adhesive layer.SOLUTION: An adhesive contains a 4-methyl-1-pentene/α-olefin copolymer (A) which satisfies the following requirements (a), (b), (c) and (d). (a) The polymer is composed of a structural unit (i) derived from 15-75 mole% of 4-methyl-1-pentene and a structural unit (ii) derived from 25-85 mole% of α-olefin. (b) It has a limiting viscosity [η] in the range of 0.1-5.0 dL/g, when measured in decalin at 135°C. (c) It has a molecular weight distribution (Mw/Mn) in the range of 1.0-3.5. (d) It has a density in the range of 880-810 kg/m.
Abstract:
PROBLEM TO BE SOLVED: To provide a 4-methyl-1-pentene (co)polymer in which injection blow molding is possible, and which gives a molding which excels in transparency and heat resistance, and further which is excellent in mechanical properties.SOLUTION: The 4-methyl-1-pentene (co)polymer satisfies the following requirements (a)-(d). (a) A constituent unit derived from 4-methyl-1-pentene is 100 mol%-80 mol%, and a constituent unit derived from at least one chosen from a 2-20C α-olefin (excluding 4-methyl-1-pentene) is 0 mol%-20 mol%; (b) an intrinsic viscosity [η] (dl/g) measured in decalin at 135°C is 0.5-5.0; (c) a melting point (Tm) measured by DSC is in a range of 165°C-250°C; and (d) a density is 820-850 (kg/m).
Abstract:
PROBLEM TO BE SOLVED: To provide a material for manufacturing a grip which does not stick, and is excellent in unevenness following, stress absorbance and flexibility; and to provide the grip having such characteristics.SOLUTION: The material for the grip includes at least a 4-methyl-1-pentene propylene copolymer (A) which satisfies the following requirements (a), (b) and (c): (a) the copolymer is made of a constituent unit (i) derived from 4-methyl-1-pentene of 15 to 75 mol% and a constituent unit (ii) derived from propylene of 25 to 85 mol%; (b) intrinsic viscosity (η) measured at 135°C in Decalin is in the range of 0.1 to 5.0 dL/g; and (c) a molecular weight distribution (Mw/Mn) is in the range of 1.0 to 3.5.