| abstract |
The protective film composition which has the function of the protective film of high transparency and flatness, and also has the function of the alignment film of liquid crystal orientation is calculated | required, and also the reduction of the manufacturing cost of a liquid crystal display element is calculated | required. This invention is polyester which is polyester-polyamic acid (A1) obtained by using at least a polyhydric hydroxy compound (a1), a diamine (a2), and the compound (a3) which has two or more acid anhydride groups, and its imide. Provided is a protective film composition comprising at least one selected from the group consisting of polyimide (A2), and polyamic acid (B).n n n Protective film, color filter, liquid crystal, alignment, polyamide, polyimide |