Abstract: A process for producing an isocyanate trimer and a process for producing an urethane with a catalyst for isocyanate trimerization or urethane formation, which comprises cesium fluoride or a tetraalkylammonium fluoride.

Abstract: A novel tri-substituted triphenyl isocyanurate is defined by the following formula and useful as a crosslinking agent for resins. ##STR1## wherein X represents --O-- or --COO--; and R represents a hydrogen atom, a straight-chain or branched alkyl group having 1 to 10 carbon atoms, which may be either unsubstituted or substituted with a hydroxyl group, an aryl group or an R'.sub.3 Si group (wherein a plurality of R' groups may be the same or different from each other and each represents a straight-chain or branched alkyl group having 1 to 10 carbon atoms or a phenyl group), except when X is --O-- and R is CH.sub.3.

Abstract: A polymer of an epoxy compound is selectively obtained by polymerizing an epoxy compound having the formula (I): ##STR1## wherein R is a substituted or unsubstituted alkyl group, by using an initiator comprising a silyl ether represented by the general formul (II): ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 are each a substituted or unsubstituted alkyl or aryl group, in the presence of an inorganic fluoride catalyst, thereby preparing a polyether having a silyloxy group in its terminal.

Abstract: The present invention relates to a novel viologen derivative having at least one polymerizable vinyl group directly bonded to a viologen skelton and a process for producing the same.The novel viologen derivative can be used for a display material, various sensors and the like.