TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The nanomaterial is nanozinc oxide, nanosilicon oxide, nanocalcium carbonate, and/or nanotitanium dioxide. The nanomaterial has a granularity of 10-100 (preferably 30-70) nm. Component B further comprises pigment including titanium white, carbon black, or other pigments capable of changing color of the paint. The water absorbent agent is molecular sieve, anhydrous calcium chloride, or active carbon. The delusterant is silicon dioxide, or wax.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The catalyst is tertiary amine catalyst or organic metallic salt catalyst. The ultrasonic absorbing agent is benzophenone or benzotriazole. The dispersant is polyamine, phosphate, or carboxylate. The antioxidant is pentaerythritol ester, triphenyl phosphite, or hexanediol ester.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The nanocomposite diphenylmethane diisocyanate is graft-modified diphenylmethane diisocyanate. The diphenylmethane diisocyanate is liquefied diphenylmethane diisocyanate. The hydroxyl terminated polyether is polyether polyol. Component A further contains dispersant and coupling agent. The amino terminated polyether is aliphatic amino terminated polyether of 3 or 2 functionalities. Component B further comprises hydroxyl terminated polyether which is polyether polyatomic alcohol. The chain extender is aromatic or aliphatic diamino chain extender. Component B further comprises water absorbent agent, delusterant, dispersant, antioxidant, catalyst, and UV absorbing agent. Component A comprises (pts.wt.) liquefied diphenylmethane diisocyanate (45-85, preferably 0-75), nanomaterial (0.1-5, preferably 0.5-1.5), polyol ether (15-60, preferably 20-50), dispersant (0-0.5, preferably 0.05-0.5), and coupling agent (0-0.05, preferably 0.05-0.5). Component B comprises (pts.wt.) dialkylmethyl diamine (0-30, preferably 5-20), diethyl toluenediamine (0-25, preferably 5-15), dimethyl thio-toluene diamine (0-40, preferably 5-15), bifunctional polyetheramine (5-70, preferably 30-60), tri-functional polyetheramine (0-20, preferably 5-15), tri-functional polyoxypropylene polyol ether (0-60, preferably 0-40), bifunctional polyoxypropylene polyol ether (0-50, preferably 0-30), pigment (0.1-10, preferably 2-4), catalyst (0-1, preferably 0.1-0.5), water absorbent agent (0.1-3, preferably 0.5-2), delusterant (0.1-10, preferably 2-6), UV absorbing agent (0-3, preferably 0.1-2), dispersant (0.05-1, preferably 0.2-0.4), and antioxidant (0-1, preferably 0.5-0.5). The polyol ether is bifunctional polyol ether with a hydroxyl value of 45-65 and a molecular weight of 2000, or tri-functionality polyol ether with hydroxyl value of 30-40 and molecular weight of 3000. The bifunctional polyetheramine has an amino value of 0.9-1.1 mol/g, and a molecular weight of 1500-2500. The tri-functional polyetheramine has an amino value of 0.5-0.7 mmol/g and a molecular weight of 3000-6000.