Photosensitive alkali-soluble resin, method of preparing the same, and color photosensitive resist containing the same

A method of preparing a photosensitive alkali-soluble resin comprising:

• a) copolymerizing ethylene oxide with α-hydroxyalkyl phenyl ketone to obtain a first intermediate product;
• b) copolymerizing the first intermediate product with a copolymerization product of glycerin acrylate, styrene and maleic anhydride to obtain the second intermediate product;
• and
• c) oxidizing the second intermediate product to produce the photosensitive alkali-soluble resin, wherein the molar ratio of the ethylene oxide to the α-hydroxyalkyl phenyl ketone is 1:1 to 8:1;
• the molar ratio of the glycerin acrylate, the styrene and the maleic anhydride is (1-1.2):(1-1.2):(1-1.3);
• and molar ratio of the ethylene oxide to the glycerin acrylate is (0.5-6.1):1.