POLYVINYL ACETAL COMPOSITION CONTAINING MODIFIED POLYVINYL ACETATE, POLYVINYL ACETAL SHEET COMPRISED OF THE POLYVINYL ACETAL COMPOSITION, AND INTERLAYER FILM FOR LAMINATED GLASS COMPRISING THE POLYVINYL ACETAL COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a polyvinyl acetal composition that suffers from no optical strain and the like and exhibits excellent penetration resistance at low temperature when formed into a sheet, and a polyvinyl acetal sheet obtained by molding the polyvinyl acetal composition.;SOLUTION: The polyvinyl acetal composition includes at least polyvinyl acetal and a modified polyvinyl acetate having a carboxyl group in its side chain, where the modified polyvinyl acetate is contained in an amount of 0.1-50 pts.mass based on 100 pts.mass of the polyvinyl acetal.;COPYRIGHT: (C)2009,JPO&INPIT