HS Code Heading 3909

3909.10.00 Urea resins; thiourea resins 3909.20.00 Melamine resins 3909.30.00 Amino-resins, nesoi 3909.40.00 Phenolic resins 3909.50.10 Polyurethanes, elastomeric, in primary forms 3909.50.50 Polyurethanes, other than elastomeric or cements, in primary forms