3904.40.00.00 - Other vinyl chloride copolymers

This HTS category, "Other vinyl chloride copolymers," encompasses polymers primarily derived from vinyl chloride where it is copolymerized with one or more other monomers, and these are not elsewhere specified. This includes a broad range of materials where vinyl chloride is a significant component, but the presence of other monomers modifies its properties beyond those of pure polyvinyl chloride or specific listed copolymers. Examples might include vinyl chloride-acrylic copolymers, vinyl chloride-maleic anhydride copolymers, or vinyl chloride-acrylonitrile copolymers that do not fall under more specific headings.

It is crucial to distinguish this category from its siblings. For instance, pure poly(vinyl chloride) not mixed with other substances is classified under 3904.10.00.00. Similarly, specific copolymers like vinyl chloride-vinyl acetate (3904.30) and vinylidene chloride polymers (3904.50.00.00) have their own distinct headings due to their unique characteristics and common industrial applications. This category serves as a residual for vinyl chloride-based copolymers not covered by these more narrowly defined classifications.

As this node is a leaf node, there are no further subcategories. Therefore, classification into 3904.40.00.00 depends on a thorough analysis of the material's composition and the absence of it meeting the criteria for more specific sibling entries. Factors such as the percentage of vinyl chloride relative to other monomers and the resulting physical or chemical properties are key considerations in determining whether a product falls within this residual category.