Polyester adhesive composition

摘要

The present invention has an object to provide a solvent-free polyester-based adhesive composition having good coatability and capable of forming an adhesive that shows good adhesion performance. The present invention provides a polyester-based adhesive composition containing a polyester having Mw of from 1×103 to 20×103 as a main component and a trifunctional or more polyepoxy compound as a crosslinking agent, and containing substantially no organic solvent. The molar number, mOH, of hydroxyl group contained in a polyalcohol component constituting the polyester is from 0.5 to 0.98 times of the molar number, mCOOH, of carboxyl group contained in a polycarboxylic acid component. The composition has a viscosity at 23° C. of at most 80 Pa·s.

主权项

1. An adhesive composition containing substantially no organic solvent,
wherein the composition is a polyester-based adhesive composition comprising a polyester having a weight-average molecular weight of from 1.0×103 to 20×103 as a main component thereof and a trifunctional or more polyepoxy compound as a crosslinking agent, wherein, when the molar number, mcooH, of carboxyl group contained in a polycarboxylic acid component constituting the polyester is taken as 1, the molar number, mOH, of hydroxyl group contained in a polyalcohol component constituting the polyester is from 0.5 to 0.98, wherein the composition has a viscosity at 23° C. of at most 80 Pa·s, and wherein at least one polycarboxylic acid of the polycarboxylic acid component constituting the polyester is an aliphatic dicarboxylic acid having a dimerized structure of an unsaturated fatty acid.