HARD COATING COMPOSITE, AND RESIN SUBSTRATE HAVING A HARD COAT LAYER

摘要

To provide an organo polysiloxane which is capable of improving the abrasion resistance and weather resistance of a hard coating layer obtained by using a silicone-type hard coating composition; a hard coating composition which is capable of forming, on a resin substrate surface, a hard coating layer excellent in the abrasion resistance and weather resistance; a resin substrate having a hard coating layer excellent in the abrasion resistance and weather resistance; and a resin substrate having a hard coating layer which can be used in a bent state. A hard coating composition comprising two types of an organo polysiloxane (a) composed mainly of T units as silicone-containing bond units and the same (b), i.e. (a) is an organo polysiloxane having 3 types of T units in a specific ratio, and (b) is an organo polysiloxane having a weight average molecular weight from 1/10 to 1/1.5 time that of (a). Such an organo polysiloxane (a). Further, a resin substrate having a hard coating layer made of a cured product of such a composition.