Study On Preparation Of Liquid Wear Resistant Coating And These Properties On Laminated-Timber Floor

Laminate-timber floor is a new environment-friendly building material, soit is popular in late years as new decorative material used to the indoor-ground.However, the wear resisting overlay of laminate-timber floor is expensive and80% excellent-quality products depend on the import products and contrainedthe development of laminate-timber floor in china. Aimed at this situation, thispaper introduces superfine powdered materials and liquid wear resistant coatingto develop a new low-costing wearing coat with decorative function and highwear-resiting property. The process of manufacture was systematicallyresearched, and then we studied the mechanism of wear-resisting and wear-outof liquid wear-resistant coating.Firstly, superfine-alumina aqueous dispersion was studied.The resultsshowed that when condition was dispersant W-518=0.4wt%, pH=9,superfine-alumina content=5wt%, ultrasonic for 120minutes, temperature=40℃, excellent stable superfine-alumina aqueous dispersion can be acquired.After that, the surface modification of superfine-alumina with silanecouling reagent KH-550, was studied. According to the spectra of FTIR, TG andDTA, it was inferred that the KH-550 was covalent bond on the surface ofsuperfine-alumina pariticles, Adsorptive capactity was about 2%～4%.Continued, wear-resisting latex can be prepared by mixingsuperfine-alumina with melamine resin, was studied. The results showed thatwhen condition was temperature=40℃, stirring time=25minutes, stirringspeed=300r/min, resin content=50%,emulsity agant=1%, solidified agent=0.5%,mold releasing agent=0.5%, superfine-alumina content=10～20%, storagetemperature=20～40℃, excellent wear-resisting latex can be acquired. Datefrom SEM indicated that superfine-alumina uniform dispersion in melamineresin.At last, we studied the properties and mechanism of wear-resisting andwear-out of liquid wear-resistant coating. The results showed that liquidwear-resistant coating initial wear point is 4000r and final wear point is 5200rwhen superfine-alumina amount coated on the paper reach to 15.4 g/m~2. Thatmeasure up to the national standards of used in household indoor-ground. Theresults also showed that abrasion resistance of liquid wear-resistant coatingdepond on perfbrmance of parent material, reinfarced material,interfacebetween resins and inorganic antifriction materials. In the wearing process, Wearmaterials were chosen from resin to superfine powdered materials. The coating's abrasion mechanism is conversed from adhere wearing to abrasive stuff wearing.