| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an adhesive excellent in oxygen barrier properties and lamination operability, composed mainly of a polyester widely used for food packaging; and an oxygen barrier film using the adhesive. <P>SOLUTION: This adhesive comprises a polyol expressed by general formula (1) and whose number-average molecular weight is in a range of 1,000-15,000, and a curing agent reactive with the polyol. The oxygen barrier film uses the adhesive. In the formula (1), A represents a partial structure excluding hydroxy groups of polyesterpolyol having hydroxy groups at both terminals, composed of a polycarboxylic acid component containing at least one kind of ortho-phthalic acid and its anhydride, and a polyhydric alcohol, where the content of the ortho-phthalic acid and its anhydride to the whole polycarboxylic acid component is 70-100%; B represents a partial structure excluding isocyanate groups of diisocyanate compound; and n represents an average degree of polymerization. <P>COPYRIGHT: (C)2012,JPO&INPIT |
