Patent ID: 9637611
Date: 2017-05-02
CPC Classifications: C08K,Y10T

Claim:
1. A preparing method of a polyurea nanocapsule, the preparing method comprising: (a) polymerizing an amine based compound and an isocyanate based compound in a solvent to obtain a polyurea sol solution; and (b) adding the polyurea sol solution to an aqueous solution to prepare a polyurea nanocapsule, wherein the preparing method is performed below room temperature, the amine based compound and the isocyanate based compound are selected from the following compounds: {circle around (1)} (at least three functional amine selected from triamine, tetramine, and a mixture thereof) and (diisocyanate), {circle around (2)} (diamine) and (at least three functional isocyanate selected from triisocyanate, tetraisocyanate, and a mixture thereof), {circle around (3)} (at least three functional amine selected from triamine, tetraamine, and a mixture thereof) and (at least three functional isocyanate selected from triisocyanate, tetraisocyanate, and a mixture thereof), {circle around (4)} a mixture of at least two thereof, the solvent is selected from dimethylformamide (DMF), dimethyl sulfoxide (DMSO), N-methyl-2-pyrrolidone(NMP), dimethylacetamide(DMAC) or a mixture of at least two thereof, and the aqueous solution is an aqueous solution containing a surfactant selected from sodium dodecyl sulfate (SDS), sodium dodecylbenzene sulfate (SDBS), cetyltrimethyl ammonium bromide (CTAB), ammonium lauryl sulfate (ALS), potassium lauryl sulfate, dioctyl sodium sulfosuccinate (DSS), dimethyl ether of tetradecylphosphonic, abietic acid, polyethoxylated octyl phenol, lauryl monoethanol, glycerol diester, diglyceride, sorbitan monoester, dodecyl betaine, n-dodecyl pyridinum chloride or a mixture of at least two thereof.