Modifier and Preparation Method Thereof, and Modified Acrylic Resin and Preparation Method and Use Thereof

A modified acrylic resin, comprising the following raw materials in parts by mass:

• 100 parts of acrylic acid, 5 parts to 60 parts of a modifier, 1 part to 30 parts of a crosslinking agent, 1 part to 30 parts of an initiator, and 200 parts to 600 parts of water;
• wherein
• the modifier comprises an acylate and/or a hyperbranched esterified polymer;
• wherein
• raw materials of the acylate comprise a first hydroxyl organic amine and maleic anhydride;
• and
• raw materials of the hyperbranched esterified polymer comprise a second hydroxyl organic amine, the maleic anhydride, and an acidic catalyst;
• the first hydroxyl organic amine and the second hydroxyl organic amine independently are one or more selected from the group consisting of N-(2-hydroxyethyl)ethylenediamine, N,N-bis(2-hydroxyethyl)ethylenediamine, N,N′-bis(2-hydroxyethyl)ethylenediamine, and N,N,N′, N′-tetrahydroxyethylethylenediamine;
• a preparation process of the acylate comprises the following steps:
• mixing the first hydroxyl organic amine with the maleic anhydride to allow first acylation to obtain the acylate;
• and
• a preparation process of the hyperbranched esterified polymer comprises the following steps:
• subjecting the second hydroxyl organic amine and the maleic anhydride to second acylation to obtain the acylate;
• and
• mixing the acylate with the acidic catalyst to allow esterification to obtain the hyperbranched esterified polymer.