An object of the present invention is to provide a binder resin for a conductive paste, which can be used to obtain a conductive paste having a high conductive powder dispersibility, an ability to form high-aspect-ratio lines, and a low residual carbon content after firing. Further objects of the invention are to provide a conductive paste and a solar cell element produced using such a binder resin for a conductive paste.
The invention provides a binder resin for a conductive paste, which includes a polymer having a main chain composed of a segment derived from a (meth)acrylate monomer and having also a phosphoric acid-based component represented by general formula (1) below at an ω position thereon.
In general formula (1), X is an oxygen atom or a sulfur atom, and R1 and R2 are each a hydrogen atom, a hydrocarbon group having 1 to 13 carbon atoms, a hydroxyl group-containing group having 1 to 13 carbon atoms or an ester bond-containing group having 1 to 13 carbon atoms.
本发明的目的是提供一种用于导电浆料的粘结剂
树脂,它可用于获得导电浆料,该浆料具有较高的导电粉分散性、形成高宽比线的能力以及烧制后较低的残碳含量。本发明的进一步目的是提供一种导电浆料和一种使用这种导电浆料粘结剂
树脂生产的太阳能电池元件。
本发明提供了一种用于导电浆料的粘合剂
树脂,它包括一种聚合物,该聚合物的主链由从(甲基)
丙烯酸酯单体中提取的一段组成,并且在其ω位上还具有以下通式(1)所代表的
磷酸基成分。
在通式(1)中,X 是氧原子或
硫原子,R1 和 R2 分别是氢原子、具有 1 至 13 个碳原子的烃基、具有 1 至 13 个碳原子的含羟基的基团或具有 1 至 13 个碳原子的含酯键的基团。