Example 5: Used as a permanent fingerprint resistant coating
The polyhydrosilazane is used as the polyhydrosilazane, and its number relative molecular weight is 150~150 000. With din-butyl ether as solvent, palladium propionate 0.75% (based on the polyhydrosilazane) as catalyst, the solution of 20% concentration of polyhydrosilazane is prepared. It was sprayed on a brushed stainless steel (3 cm×3 cm), ventilated at room temperature for 10 min, and then it was post-heat treated in a drying oven (130℃, 1 h) to make the coating solidified. The thickness of the coating was 2.1 μm. The coating can also be applied to chromium-plated plastic substrates, and its coating adhesion (DIN EN ISO 2409 -- 2013) is class 0; Anti-fingerprint performance evaluation is to add the fingerprint on the paint substrate, and then wipe it with cotton cloth, and visually evaluate the ability to remove fingerprints. The results show that the fingerprint on the substrate coated with the coating can be completely removed easily, while the fingerprint on the substrate without coating cannot be completely removed no matter how much force is applied. The long - acting tests against fingerprints also show that the coating can obtain satisfactory results. Its test method is, the complex fingerprint without coating and the coating substrate and substrate at room temperature for two weeks, and then used isopropyl alcohol respectively on the surface of the coated and uncoated to wipe, to remove superficial of fingerprints, the result is coated with the coating on the surface of the fingerprints can be easily removed completely, without coating on the substrate of fingerprints still visible.
Example 6: Make hydrophilic paint
An impregnation device with a stepper motor speed of 20 cm/min was used to immerse a polycarbonate plate (10 cm×10 cm) into a n-dibutyl ether solution with a concentration of 20% perhydropolysilazane. After staying for 10 s, the plate was withdrawn from the solution at a speed of 20 cm/min and allowed to drip briefly. Then exposed in the air for 10 min, then immersed in the BIke COMPANY LPN-6640 additives (10% concentration) aqueous solution (the original solution is 40% concentration, diluted by 3∶1 water), placed in the aqueous solution for 24 h, then cleaned with water, determination of the coating and water contact Angle is less than 10°; The same method can also be used to make stainless steel hydrophilic coating, its water contact Angle is also below 10°.
 
Example 7: Anti-graffiti paint
Poly silazane coating with high crosslinking density and low surface energy (105 mN/m), high hardness, and scratch resistance, chemical resistance and good corrosion resistance, can be used in the above 600 ℃ high temperature environment, so the coating can resist ink and color infiltration in particular, the scribble prevent write, easy to clean, can be used for building and bus transportation.