A grand number of ontologies, covering almost all domains are freely available in the internet, but many potential users prefer to design his ontology from scratch. The main reasons are related to the difficulties in searching and reusing ontologies. In fact, ontologies combine two major kinds of knowledge: domain and task knowledge (related to the tacks of it possible usage), but tack knowledg...

New polyurethane compositions with polyols based on propylene glycol and glycerin have been studied. The technological parameters of the adhesive composition were determined: start time, gelation life (tack-free) time. for maximum elasticity line has developed.