Hardcoat compositions and hardcoated articles

Details Hardcoat compositions and hardcoated articles Hardcoat compositions and hardcoated articles

2006-05-30

2006-05-30

Robertson, Jeffrey B. (Department: 1712)

Stock material or miscellaneous articles

Composite

Of silicon containing

C524S430000, C524S432000, C524S588000, C524S837000, C524S858000, C524S863000

Reexamination Certificate

active

07052770

ABSTRACT:
A hardcoat composition comprising (A) a hydrolytic condensate of a hydrolyzable silicon compound of formula: R1aSiX(4-a)with at least 1 mole of water per mole of hydrolyzable group X, (B) a metal oxide, (C) a siloxane resin of formula: R2bSi(OR3)c(OH)dO(4-b-c-d)/2and having a Mw of at least 2,000, which is solid at a temperature of not higher than 40° C., and (D) a curing catalyst forms a hardcoat film having satisfactory hardness, transparency and adhesion as well as improved weather resistance and presenting a surface that is repellent to marker ink.

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Tohge, N. et al., “Effects of UV-Irradiation on the Formation of Oxide Thin Films from Chemically Modified Metal-Alkoxides”, Journal of Sol-Gel Science and Technology, 2, pp. 581-585, (1994).

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