high - temperature resistant polymerizable metal oxide particles having a glass transition temperature of the homopolymerizable ≧ 100 ° c . and a core a . the core includes an oxide of a metal or semimetal of the third to sixth main group , of the first to eighth subgroup of the periodic table , or of the lanthanides , and has at least one group — w — x bound via the oxygen atom of the oxide or hydroxide , in which b represents a binding link , and x represents a reactive functional group , and w is equal to 0 or 1 . the inventive particles are useful , in particular , for producing coating materials , molding materials and adhesives .