Patent ID: 7560508
Filing Date: 2009-07-14
Classification: C08J,C09D,G02B,Y10T

Abstract:
1. An anti-scratch coating polymerisable composition comprising: a) at least one alkoxysilane and/or at least one hydrolysate thereof; and b) anisotropic particles of at least one metal oxide and/or of at least one metal oxyhydroxide, having a main axis and a length D1 following this main axis, smaller than or equal to 400 nm and whereof the sizes vary, in a direction transversal to said main axis, between a minimum dimension D2 and a maximum dimension D3, with D3≧D2; wherein the ratios F=D1/D2 and f=D1/D3 defining the form factors of said anisotropic particle verify the relation F>10 and f≧10, and wherein said metal oxide and/or metal oxyhydroxide is selected from the group consisting of oxides and oxyhydroxides of aluminum, zirconium, titanium, iron, tungsten, vanadium, and mixtures thereof.