Abstract:
There is provided a binder for ceramic formation or a conductive paste, comprising polyvinyl acetal having a degree of acetalization of from 50 to 85 mol %, a content of vinyl ester monomer unit of from 0.1 to 20 mol %, and having a viscosity-average degree of polymerization of from 200 to 5000, wherein a peak-top molecular weight (A) as measured by a differential refractive index detector and a peak-top molecular weight (B) as measured by an absorptiometer (measurement wavelength: 280 nm) in gel permeation chromatographic measurement of the polyvinyl acetal heated at 230° C. for 3 hours satisfy a formula (1) (A−B)/A
Abstract translation:提供了一种用于陶瓷形成的粘合剂或导电性糊剂,其包含缩醛化度为50〜85摩尔%的聚乙烯醇缩醛,乙烯基酯单体单元的含量为0.1〜20摩尔%,粘度平均 聚合度为200至5000,其中通过差示折射率检测器测量的峰顶分子量(A)和通过吸光光度计(测量波长:280nm)测量的峰顶分子量(B)在 在230℃下加热3小时的聚乙烯醇缩醛的凝胶渗透色谱测定满足式(1)(A-B)/ A <0.60,聚乙烯醇缩醛的峰顶分子量(B) 从0.50×10-3到1.00×10-2。