Modified aspartate resin and aqueous dispersion
AssigneeShenzhen Feiyang Protech Corp., Ltd
InventorsPoli Zhao, Jiang Wu, Linna Che, Xiaoyong Qiu, Shankai Luo, Longhui Zhu
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Abstract
Disclosed are a modified aspartate resin and an aqueous dispersion, which relate to the technical field of aqueous emulsion. The modified aspartate resin is obtained by reacting a hydrophilic aspartate resin with a polyisocyanate compound, followed by reaction with a hydrophobic aspartate resin. The modified aspartate resin exhibits moderate hydrophilicity, enabling self-emulsifying dispersion in water to form an aqueous dispersion. The film formed from the aqueous dispersion after curing shows good water resistance.
Claims8
A method for preparing a modified aspartate resin, comprising the following steps:
- S1:
- reacting a hydrophilic aspartate resin with a polyisocyanate compound to obtain a first resin containing NCO groups, wherein the hydrophilic aspartate resin contains a polyethylene glycol segment and a structure of the hydrophilic aspartate resin in the step S1 is as shown in formula (1),
- wherein X is selected from non-ionic m-valent organic groups having a number-average molecular weight of 50-5000 and containing no more than two heteroatoms, which are reaction-inert with isocyanate groups at 100° C., at least one of R1 and R2 contains the polyethylene glycol segment, and m is 2, 3, or 4;
- and
- S2:
- reacting the first resin obtained in the step S1 with a hydrophobic aspartate to obtain the modified resin.
Dependencies are inferred from the claim text.