The present invention aims to provide a polyvinyl acetal resin composition that is excellent in thermal stability and moldable by an extrusion method and can exhibit a high storage modulus even under high temperature, an adhesive sheet prepared from the polyvinyl acetal resin composition, an interlayer filling material for a touch panel prepared from the polyvinyl acetal resin composition, and a laminate produced using the interlayer filling material for a touch panel. The present invention relates to a polyvinyl acetal resin composition containing: a polyvinyl acetal; a photoradical polymerization initiator; and a monomer or oligomer having a radical polymerizable double bond.

The present invention provides a preparing method of a polymer which is low-toxic, environmental-friendly, highly controllable, and low cost to obtain a polymer with high molecular weight. The preparing method comprises conducting a controlled radical polymerization process of monomer (Y). In the controlled radical polymerization process, organic compound (A) which has the formula (I) and radical initiator (B) are existing in a mole ratio (B/A) ranged from 0.5 to 25,

##STR00001## wherein R.sup.1 is a hydrogen atom, alkyl group, aryl group, or hydroxyl group, the alkyl group can be alkyl having substituents or alkyl substituent, and the aryl group can be aryl having substituents or aryl substituent.

The present invention provides a preparing method of a polymer which is low-toxic, environmental-friendly, highly controllable, and low cost to obtain a polymer with high molecular weight. The preparing method comprises conducting a controlled radical polymerization process of monomer (Y). In the controlled radical polymerization process, organic compound (A) which has the formula (I) and radical initiator (B) are existing in a mole ratio (B/A) ranged from 0.5 to 25,

##STR00001## wherein R.sup.1 is a hydrogen atom, alkyl group, aryl group, or hydroxyl group, the alkyl group can be alkyl having substituents or alkyl substituent, and the aryl group can be aryl having substituents or aryl substituent.

An object of the present invention is to provide a piezoelectric polymer film having excellent piezoelectric characteristics. The object is achieved by providing a piezoelectric polymer film including a piezoelectric layer containing lead zirconate titanate particles in a matrix that contains a polymer material, and an electrode layer provided on each of both surfaces of the piezoelectric layer, in which a Raman shift of a maximum peak present in a range of 190 to 215 cm.sup.−1 in a Raman spectrum of the piezoelectric layer is 205 cm.sup.−1 or less.

An object of the present invention is to provide a piezoelectric polymer film having excellent piezoelectric characteristics. The object is achieved by providing a piezoelectric polymer film including a piezoelectric layer containing lead zirconate titanate particles in a matrix that contains a polymer material, and an electrode layer provided on each of both surfaces of the piezoelectric layer, in which a Raman shift of a maximum peak present in a range of 190 to 215 cm.sup.−1 in a Raman spectrum of the piezoelectric layer is 205 cm.sup.−1 or less.

Compositions that include a polymer and an aldaric acid, such as glucaric acid, are disclosed. The compositions may include polyvinyl alcohol and glucaric acid. The compositions may also include polyacrylonitrile and glucaric acid. In addition, the compositions may further include lignin. Also disclosed are fibers including the compositions, methods of making the fibers, and uses of the fibers.

Compositions that include a polymer and an aldaric acid, such as glucaric acid, are disclosed. The compositions may include polyvinyl alcohol and glucaric acid. The compositions may also include polyacrylonitrile and glucaric acid. In addition, the compositions may further include lignin. Also disclosed are fibers including the compositions, methods of making the fibers, and uses of the fibers.

Provided are: a radical polymerization initiator which has excellent sensitivity and solubility in water; a composition containing the same; a cured product of the composition; a method of producing the cured product; and a compound. The radical polymerization initiator contains a compound represented by Formula (A) below (wherein Z.sup.1 represents a direct bond or the like; Z.sup.2 represents —C(R.sup.102).sub.2— or the like; R.sup.1 to R.sup.8 each represent a hydrogen atom or the like, or a group containing a salt-forming group, which is represented by Formula (B1) below (wherein L.sub.1 represents a direct bond or the like, B represents an acidic group salt or the like, b represents 1 to 10, and the asterisk (*) represents a binding site), at least one of R.sup.1 to R.sup.8 is the group containing a salt-forming group; R.sup.101 and the like each represent a hydrogen atom or the like; one or more hydrogen atoms in the alkyl group and the like used as R.sup.1 to R.sup.8 and the like are optionally substituted with an ethylenically unsaturated group or the like; one or more methylene groups in R.sup.1 to R.sup.8 and the like are optionally substituted with a double bond or the like; adjacent groups such as R.sup.1 and R.sup.2 are optionally bound together to, form a ring and optionally form a fused ring with a benzene ring in Formula (A); and represents a hydrogen atom or the like). ##STR00001##

Provided are: a radical polymerization initiator which has excellent sensitivity and solubility in water; a composition containing the same; a cured product of the composition; a method of producing the cured product; and a compound. The radical polymerization initiator contains a compound represented by Formula (A) below (wherein Z.sup.1 represents a direct bond or the like; Z.sup.2 represents —C(R.sup.102).sub.2— or the like; R.sup.1 to R.sup.8 each represent a hydrogen atom or the like, or a group containing a salt-forming group, which is represented by Formula (B1) below (wherein L.sub.1 represents a direct bond or the like, B represents an acidic group salt or the like, b represents 1 to 10, and the asterisk (*) represents a binding site), at least one of R.sup.1 to R.sup.8 is the group containing a salt-forming group; R.sup.101 and the like each represent a hydrogen atom or the like; one or more hydrogen atoms in the alkyl group and the like used as R.sup.1 to R.sup.8 and the like are optionally substituted with an ethylenically unsaturated group or the like; one or more methylene groups in R.sup.1 to R.sup.8 and the like are optionally substituted with a double bond or the like; adjacent groups such as R.sup.1 and R.sup.2 are optionally bound together to, form a ring and optionally form a fused ring with a benzene ring in Formula (A); and represents a hydrogen atom or the like). ##STR00001##

Release paper base paper includes a substrate; and a coating agent containing a modified polyvinyl alcohol (A) and sodium acetate, the substrate coated with the coating agent, wherein the modified polyvinyl alcohol (A) has 0.005 mol % or more and less than 10 mol % of double bonds derived from unsaturated carboxylic acid or a derivative thereof (B) in side chains, has 1.4 mol % or more and 2.0 mol % or less of 1,2-glycol bond, units, and is water soluble, and a content of the sodium acetate relative to the modified polyvinyl alcohol (A) is 0.01 mass % or more and 10 mass % or less. The release paper base paper of the present invention is excellent in sealing properties for silicone. Use of the release paper base paper allows acceleration of curing of silicone in a release layer and improvement in adhesion between the substrate and the release layer.