Chemicals used in science and industry, except chemical products used in the rubber industry; plastics; artificial resins; elastomers; adhesives; polyurethanes; polyepoxydes; polyureas; chemicals for use in or the production of plastics, artificial resins, elastomers, foams or adhesives such as additives, catalysts, monomers, colourants or stabilizers; the aforementioned goods especially for polyurethane polymers, polyurea polymers or epoxy resins