201659 Other plastics, in primary forms, n.e.c.

20165920 Petroleum resins, coumarone-indene resins, polyterpenes, polysulphides, polysulphones, etc, n.e.c., in primary forms 20165940 Cellulose and its chemical derivatives, n.e.c., in primary forms 20165960 Natural and modified polymers, in primary forms (including alginic acid, hardened proteins, chemical derivatives of natural rubber) 20165970 Ion-exchangers based on synthetic or natural polymers