COMPOSITION HAVING EXCELLENT TRANSPARENCY

摘要

To provide a laminated product of a layer including a polyvinyl acetal and a layer including a hydrocarbon-based polymer, having excellent adhesion between the layers.;A composition including, with respect to 100 parts by mass of a polyvinyl acetal satisfying definition 1 and/or definition 2, 30 to 70 parts by mass of a plasticizer including 0.5 to 100% by mass of a plasticizer containing a polar group and 0 to 99.5% of a plasticizer containing no polar group.;Definition 1: When 1 g of a polyvinyl acetal is dissolved in 100 g of methanol, an undissolved content is 2.5 to 90% by mass.;Definition 2: When 1 g of a polyvinyl acetal is dissolved in 100 g of chloroform, an undissolved content is 5 to 70% by mass.

主权项

1. A composition comprising:
a polyvinyl acetal satisfying at least one of definition 1 and definition 2; Definition 1: When 1 g of the polyvinyl acetal is dissolved in 100 g of methanol, an undissolved content of the polyvinyl acetal is 2.5 to 90% by mass with respect to 100 parts by mass of the polyvinyl acetal; Definition 2: When 1 g of the polyvinyl acetal is dissolved in 100 g of chloroform, an undissolved content of the polyvinyl acetal is 5% to 70% by mass with respect to 100 parts by mass of the polyvinyl acetal; and 30 parts to 70 parts by mass of a plasticizer mixture, the plasticizer mixture comprising 0.5% to 100% by mass of a plasticizer comprising a polar group and 0% to 99.5% by mass of a plasticizer comprising no polar group; wherein the plasticizer comprising a polar group comprises a polar group selected from the group consisting of a hydroxyl group, a polyethyleneoxide group having a polymerization degree of 10 or more, a polypropylene oxide group having a polymerization degree of 10 or more, a carboxyl group and an amino group.