A polyvinyl alcohol-based resin composition including a modified vinyl alcohol-based polymer (A) in which a polyoxyalkylene unit represented by a general formula (I) is bonded to a polyvinyl alcohol chain and a modified vinyl alcohol-based polymer (B) having a double bond in a polyvinyl alcohol chain.

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(In which: R.sub.1 and R.sub.2 are independently, a methyl group, an ethyl group or a hydrogen atom, and R.sub.3 is an alkyl group or a hydrogen atom. N represents a number of repeating units and is an integer of 5≤n≤70.)

A polyvinyl alcohol-based resin composition including a modified vinyl alcohol-based polymer (A) in which a polyoxyalkylene unit represented by a general formula (I) is bonded to a polyvinyl alcohol chain and a modified vinyl alcohol-based polymer (B) having a double bond in a polyvinyl alcohol chain.

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(In which: R.sub.1 and R.sub.2 are independently, a methyl group, an ethyl group or a hydrogen atom, and R.sub.3 is an alkyl group or a hydrogen atom. N represents a number of repeating units and is an integer of 5≤n≤70.)

A method for discriminating a polyvinyl alcohol resin film containing a polyvinyl alcohol resin in which all or a part of carbon is derived from bio-derived ethylene from a polyvinyl alcohol resin film containing only a polyvinyl alcohol resin derived only from fossil fuel-derived ethylene by measuring an abundance ratio .sup.14C/C of carbon 14 (.sup.14C) in total carbon.

The present invention relates to a polyvinyl alcohol-based resin, in which a block character (A) is less than 0.4, and an absorbance (B) at 320 nm in an ultraviolet absorption spectrum in the case of making the polyvinyl alcohol-based resin into a 0.1 wt % aqueous solution is 0.2 or more.

The present invention relates to a polyvinyl alcohol-based resin, in which a block character (A) is less than 0.4, and an absorbance (B) at 320 nm in an ultraviolet absorption spectrum in the case of making the polyvinyl alcohol-based resin into a 0.1 wt % aqueous solution is 0.2 or more.

The present invention provides a slurry composition in which magnetic material powder has excellent dispersibility and excellent dispersion stability and which enables production of a sheet having high surface smoothness and high adhesiveness to substrates. Provided is a slurry composition containing: a polyvinyl acetal resin; magnetic material powder; and a Na ion, the slurry composition having a Na ion content of 1,000 to 3,000 μg/g relative to the polyvinyl acetal resin.

The present invention provides a slurry composition in which magnetic material powder has excellent dispersibility and excellent dispersion stability and which enables production of a sheet having high surface smoothness and high adhesiveness to substrates. Provided is a slurry composition containing: a polyvinyl acetal resin; magnetic material powder; and a Na ion, the slurry composition having a Na ion content of 1,000 to 3,000 μg/g relative to the polyvinyl acetal resin.

The present invention provides an epoxy resin composition that is provided with flexibility to combine impact resistance and mechanical strength, while maintaining epoxy resin-specific high elastic modulus, that reduces an increase in viscosity due to mixing, and that is excellent in heat resistance, storage stability, and solvent resistance. Provided is an epoxy resin composition containing: a modified polyvinyl acetal resin having a constitutional unit with an acid-modified group; a reactive diluent; and an epoxy resin, the epoxy resin composition having a sea-island phase separated structure after being cured.

The present invention provides an epoxy resin composition that is provided with flexibility to combine impact resistance and mechanical strength, while maintaining epoxy resin-specific high elastic modulus, that reduces an increase in viscosity due to mixing, and that is excellent in heat resistance, storage stability, and solvent resistance. Provided is an epoxy resin composition containing: a modified polyvinyl acetal resin having a constitutional unit with an acid-modified group; a reactive diluent; and an epoxy resin, the epoxy resin composition having a sea-island phase separated structure after being cured.

A water-soluble film for a liquid detergent-packaging capsule does not cause discoloration, can prevent precipitate of inorganic salts such as sulfites and sulfates contained in the packaging capsule or the liquid detergent, can prevent whitening due to precipitate, can maintain the haptics of the packaging capsule containing the liquid detergent and keep a good appearance over time. A liquid detergent is sealed in the water-soluble film. The film contains an anionic-group modified polyvinyl alcohol resin, a plasticizer including glycerin and sorbitol at a mass ratio of 1:2.1 to 5.3, and a sulfite, and is characterized in that the total contained amount of the glycerin and the sorbitol is 21-39 parts by mass, and the contained amount of the sulfite is 0.1-1.9 parts by mass, with respect to 100 parts by mass of the anionic-group modified polyvinyl alcohol resin.