The invention provides a novel class of propargyl compounds represented by the formula: ##STR1## wherein R is an C.sub.1 -C.sub.20 alkyl group, C.sub.1 -C.sub.20 alkylene group, C.sub.1 -C.sub.20 alkylene group interrupted by --NH-- group(s), C.sub.6 -C.sub.7 alicyclic group and an aromatic group; R.sub.1 comprises 1-100% --CH.sub.2 --C.tbd.CH group and 99-0% hydrogen atom and n is an integer of 1 to 4, and preparation thereof. These compounds are useful as coating material or sealer or rim-injection molding material.