Abstract: A process is disclosed for producing an abrasion resistant UV curable photopolymerizable composition for coating substrates. The process involves dense grafting and comprises hydrolyzing in an aqueous acidic solution a trialkoxysilane to render it organophillic followed by dispersion with fine silica or alumina. Grafting of the hydrolyzed trialkoxysilane to the silica or alumina is effected through dehydration. The grafted material is then dispersed into intimate contact with one or more photopolymerizable monomers and photoinitiators.

Abstract: Diacrylate and dimethacrylate esters corresponding to the formula ##STR1## wherein R and R' are hydrogen or methyl and A is either a sigma (.sigma.) bond; a (CH.sub.2).eta. radical where .eta. is an interger that may vary from one through four; or phenylene, or an alkyl derivative thereof. The new adamantane containing difunctional olefinic monomers can then be polymerized, or copolymerized with other acrylic type olefinic monomers to produce polymers with unusual physical properties, including unusual hardness, inertness to degradable agents, and resistance to heat.