… Petroleum resins, coumarone-indene resins, polyterpenes, polysulphides, polysulphones and other products specified in …
Explanatory notes
… resins, coumarone-indene resins, polyterpenes, polysulphides, polysulphones and other products specified in … (2) Polysulphides are polymers characterised by the presence of monosulphide linkages in the polymer chain, for example, poly(phenylene …