BINDER FOR FORMATION OF CERAMIC OR FOR USE IN CONDUCTIVE PASTE, AND USE OF SAME

摘要

A binder which is to be used either in the formation of ceramic or in a conductive paste and which contains a polyvinyl acetal that has a degree of acetalization of 50 to 85mol%, a content of vinyl ester monomer units of 0.1 to 20mol%, and a viscosity -average polymerization degree of 200 to 5000, wherein, when the polyvinyl acetal is heated at 230ºC for 3 hours and then subjected to gel permeation chromatography, the peak top molecular weight (A) measured by a differential refractive index detector and the peak top molecular weight (B) measured by an absorptiometric detector (measurement wavelength: 280nm) satisfy the relationship (1) ((A-B)/A < 0.60), and the absorbance at the peak top molecular weight (B) is 0.50×10-3 to 1.00×10-2.