| abstract |
PROBLEM TO BE SOLVED: To provide a protective film composition having a protective film function of high transparency and flatness, and further having a hard coating film function of liquid crystal orientation. Moreover, reduction of the manufacturing cost of a liquid crystal display element was calculated | required. A polyester-polyamic acid (A1) obtained by using at least a polyvalent hydroxy compound (a1), a diamine (a2), and a compound (a3) having two or more acid anhydride groups, and an imidized product thereof. The composition for protective films containing 1 or more chosen from the group which consists of a certain polyester-polyimide (A2), and a polyamic acid (B). [Selection figure] None |