Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms:

Alginic acid, its salts and esters

Other:

Polymers of ethylene, in primary forms:

Polymers of propylene or of other olefins, in primary forms:

Polymers of styrene, in primary forms:

Polymers of vinyl chloride or of other halogenated olefins, in primary forms:

Polymers of vinyl acetate or of other vinyl esters, in primary forms; other vinyl polymers in primary forms:

Acrylic polymers in primary forms:

Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms: