A multiblock copolymer, obtainable by copolymerization of a conjugated diene compound and a non-conjugated olefin, wherein: a structure of the multiblock copolymer includes A-(B-A).sub.x and/or B-(A-B).sub.x, wherein A represents a block portion constituted of monomer units of a non-conjugated olefin, B represents a block portion constituted of monomer units of a conjugated diene compound, and x represents an integer 1; content of the non-conjugated olefin portion is 30 mass %; and storage modulus G at 130 C., measured by rubber process analysis using a rubber process analyzer, i.e. RPA, according to ASTM D6204, is 20 kPa. It is possible to obtain vulcanized rubber and thus a tire having high fracture resistance and high weather resistance from the multiblock copolymer and a rubber composition derived therefrom.

A multiblock copolymer, obtainable by copolymerization of a conjugated diene compound and a non-conjugated olefin, wherein: a structure of the multiblock copolymer includes A-(B-A).sub.x and/or B-(A-B).sub.x, wherein A represents a block portion constituted of monomer units of a non-conjugated olefin, B represents a block portion constituted of monomer units of a conjugated diene compound, and x represents an integer 1; content of the non-conjugated olefin portion is 30 mass %; and storage modulus G at 130 C., measured by rubber process analysis using a rubber process analyzer, i.e. RPA, according to ASTM D6204, is 20 kPa. It is possible to obtain vulcanized rubber and thus a tire having high fracture resistance and high weather resistance from the multiblock copolymer and a rubber composition derived therefrom.

A multiblock copolymer, obtainable by copolymerization of a conjugated diene compound and a non-conjugated olefin, is characterized in that: a structure of the multiblock copolymer includes A-(B-A).sub.x and/or B-(A-B).sub.x, wherein A represents a block portion constituted of monomer units of a non-conjugated olefin, B represents a block portion constituted of monomer units of a conjugated diene compound, and x represents an integer 1; content of the non-conjugated olefin portion is 50 mol %; 0 mol % <crystal content of the non-conjugated olefin portion 20 mol %; and 0% <degree of crystallinity of the non-conjugated olefin portion 40%. Vulcanized rubber having high fracture resistance and high crack resistance (thus a rubber composition and a tire each using the vulcanized rubber and having such excellent physical properties) can be manufactured from the multiblock polymer.

Disclosed is a vinyl alcohol-based block copolymer that is a block copolymer composed of a vinyl alcohol-based polymer block (B-b) and a copolymer block (B-c) comprising a vinyl alcohol-based monomer unit and an acrylic acid-based monomer unit, wherein a content (Z) of the acrylic acid-based monomer unit relative to all monomer units is 0.05 to 20.0 mol %, the block copolymer has a saponification degree of 80 to 99.99 mol %, the block copolymer has a number-average molecular weight (Mn.sub.a) of 20,000 to 440,000, the block copolymer has a molecular weight distribution (Mw.sub.a/Mn.sub.a) of 1.05 to 1.95, and a ratio (DP.sub.b/DP.sub.a) of a number-average polymerization degree (DP.sub.b) of the vinyl alcohol-based polymer block (B-b) to the number-average polymerization degree (DP.sub.a) of the block copolymer is 0.010 to 0.999. The copolymer has a fine balance derived from the copolymer block (B-c) of having a superior solubility in water while being unlikely to undergo thickening or gelation due to pH fluctuation, and also has high mechanic strength derived from the vinyl alcohol-based polymer block (B-b).

Disclosed is a vinyl alcohol-based block copolymer that is a block copolymer composed of a vinyl alcohol-based polymer block (B-b) and a copolymer block (B-c) comprising a vinyl alcohol-based monomer unit and an acrylic acid-based monomer unit, wherein a content (Z) of the acrylic acid-based monomer unit relative to all monomer units is 0.05 to 20.0 mol %, the block copolymer has a saponification degree of 80 to 99.99 mol %, the block copolymer has a number-average molecular weight (Mn.sub.a) of 20,000 to 440,000, the block copolymer has a molecular weight distribution (Mw.sub.a/Mn.sub.a) of 1.05 to 1.95, and a ratio (DP.sub.b/DP.sub.a) of a number-average polymerization degree (DP.sub.b) of the vinyl alcohol-based polymer block (B-b) to the number-average polymerization degree (DP.sub.a) of the block copolymer is 0.010 to 0.999. The copolymer has a fine balance derived from the copolymer block (B-c) of having a superior solubility in water while being unlikely to undergo thickening or gelation due to pH fluctuation, and also has high mechanic strength derived from the vinyl alcohol-based polymer block (B-b).

Polymeric compositions obtainable by free-radical polymerization of at least two different alkyl (meth)acrylates in the presence of at least one ethylene-vinyl ester copolymer, the alkyl (meth)acrylates used being a mixture comprising alkyl (meth)acrylates having linear C.sub.12- to C.sub.60-alkyl radicals and different alkyl (meth)acrylates having linear C.sub.1- to C.sub.11-alkyl radicals and/or branched C.sub.4- to C.sub.60-alkyl radicals and/or cyclic C.sub.5- to C.sub.20-alkyl radicals. The use of such polymeric compositions as pour point depressants for crude oils, mineral oils or mineral oil products.

Polymeric compositions obtainable by free-radical polymerization of at least two different alkyl (meth)acrylates in the presence of at least one ethylene-vinyl ester copolymer, the alkyl (meth)acrylates used being a mixture comprising alkyl (meth)acrylates having linear C.sub.12- to C.sub.60-alkyl radicals and different alkyl (meth)acrylates having linear C.sub.1- to C.sub.11-alkyl radicals and/or branched C.sub.4- to C.sub.60-alkyl radicals and/or cyclic C.sub.5- to C.sub.20-alkyl radicals. The use of such polymeric compositions as pour point depressants for crude oils, mineral oils or mineral oil products.

A nanoporous film formed from a series of vinyl addition block polymers derived from functionalized norbornene monomers are disclosed and claimed. The nanoporous films as disclosed herein are useful as pervaporation membranes and antireflective coatings among various other uses. Also disclosed herein are the fabrication of nanoporous films into pervaporation membranes which exhibit unique separation properties, and their use in the separation of organic volatiles from biomass and/or organic waste, including butanol, phenol, and the like. The fabrication of nanoporous films into antireflective coatings are also disclosed.

A display film includes a transparent cross-linked polyurethane acrylate layer. The transparent cross-linked polyurethane acrylate layer having a glass transition temperature of 10 degrees Celsius or less and a Tan Delta peak value of 0.5 or greater.

A display film includes a transparent cross-linked polyurethane acrylate layer. The transparent cross-linked polyurethane acrylate layer having a glass transition temperature of 10 degrees Celsius or less and a Tan Delta peak value of 0.5 or greater.