The invention provides an olefin-olefinic alcohol copolymer and a preparation method thereof, said copolymer comprising a spherical and/or spherical-like polymer. The copolymer provided by the invention exhibits a good morphology and has good prospects in industrial use.

The invention provides an olefin-olefinic alcohol copolymer and a preparation method thereof, said copolymer comprising a spherical and/or spherical-like polymer. The copolymer provided by the invention exhibits a good morphology and has good prospects in industrial use.

The present invention concerns a process for the preparation of a copolymer comprising the steps of copolymerizing under suitable reaction conditions at least one first type of olefin monomer and at least one second type of functionalized olefin monomer using a catalyst system to obtain a polyolefin main chain having one or multiple functionalized short chain branches, the catalyst system comprising: i) a single-site catalyst or catalyst precursor comprising a metal selected from Ti3+ or Cr3+; ii) a co-catalyst; iii) optionally a scavenger.

The present invention concerns a process for the preparation of a copolymer comprising the steps of copolymerizing under suitable reaction conditions at least one first type of olefin monomer and at least one second type of functionalized olefin monomer using a catalyst system to obtain a polyolefin main chain having one or multiple functionalized short chain branches, the catalyst system comprising: i) a single-site catalyst or catalyst precursor comprising a metal selected from Ti3+ or Cr3+; ii) a co-catalyst; iii) optionally a scavenger.

Provided is a binder composition for a secondary battery with which it is possible to produce a slurry composition for a secondary battery electrode that has excellent preservation stability and can produce an electrode having excellent peel strength. The binder composition for a secondary battery contains a water-soluble polymer and polyvalent metal ions. The water-soluble polymer includes a vinyl alcohol structural unit and a carboxy group-containing monomer unit. The content of the polyvalent metal ions is not less than 0.1 mass ppm and not more than 10,000 mass ppm relative to the water-soluble polymer.

Provided is a binder composition for a secondary battery with which it is possible to produce a slurry composition for a secondary battery electrode that has excellent preservation stability and can produce an electrode having excellent peel strength. The binder composition for a secondary battery contains a water-soluble polymer and polyvalent metal ions. The water-soluble polymer includes a vinyl alcohol structural unit and a carboxy group-containing monomer unit. The content of the polyvalent metal ions is not less than 0.1 mass ppm and not more than 10,000 mass ppm relative to the water-soluble polymer.

A modified EVOH resin having a primary hydroxyl group in its side chain. In the modified EVOH resin, the proportion of an ethylene structural unit is 1 to 16.5 mol %, and the proportion of a structural unit containing the side-chain primary hydroxyl group is not less than 2.5 mol %.

A modified EVOH resin having a primary hydroxyl group in its side chain. In the modified EVOH resin, the proportion of an ethylene structural unit is 1 to 16.5 mol %, and the proportion of a structural unit containing the side-chain primary hydroxyl group is not less than 2.5 mol %.

A diverting agent of the present invention contains a polyvinyl alcohol-based resin, wherein when the diverting agent is added to a 0.48 mass % aqueous solution of guar gum to prepare a mixed solution having a concentration of 12 mass %, a dispersion liquid obtained by dispersing the mixed solution at 30° C. for 60 minutes is pressurized and dehydrated at a pressure of 1 MPa using a pressure dehydration device including a drainage part having a slit having a width of 2 mm, and a regression line represented by an equation (A): y=ax+b (in the equation (A), y is a cumulative dehydration amount (g), x is a square root of a time (minutes) elapsed from start of pressurization, a and b are a slope and an intercept of the regression line, respectively, and 0<x≤2) is calculated by a least squares method from a scatter diagram plotted on a graph in which the square root x of the time is plotted on a horizontal axis and the cumulative dehydration amount y is plotted on a vertical axis, a slope a of the equation (A) satisfies a condition (B): a≤80.

A diverting agent of the present invention contains a polyvinyl alcohol-based resin, wherein when the diverting agent is added to a 0.48 mass % aqueous solution of guar gum to prepare a mixed solution having a concentration of 12 mass %, a dispersion liquid obtained by dispersing the mixed solution at 30° C. for 60 minutes is pressurized and dehydrated at a pressure of 1 MPa using a pressure dehydration device including a drainage part having a slit having a width of 2 mm, and a regression line represented by an equation (A): y=ax+b (in the equation (A), y is a cumulative dehydration amount (g), x is a square root of a time (minutes) elapsed from start of pressurization, a and b are a slope and an intercept of the regression line, respectively, and 0<x≤2) is calculated by a least squares method from a scatter diagram plotted on a graph in which the square root x of the time is plotted on a horizontal axis and the cumulative dehydration amount y is plotted on a vertical axis, a slope a of the equation (A) satisfies a condition (B): a≤80.