Heading 3911

Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms

10 declarable lines

Heading 3911 covers a group of specialty and synthetic resins in primary forms that are not covered by the more common polymer headings, such as petroleum resins, coumarone-indene resins, polyterpenes, polysulfides and polysulfones. The heading splits first by product family: 3911.10 for petroleum, coumarone-indene and polyterpene resins, 3911.20 for poly(1,3-phenylene methylphosphonate), and 3911.90 for all other products of the heading. The 3911.90 lines then split by elastomeric status, by whether monomer units are aromatic or modified aromatic, and by thermoplastic versus thermosetting form.

Products in this heading

Petroleum resin tackifier used in hot melt adhesives
Coumarone-indene resin used in coatings and rubber compounds
Polyterpene resin made from turpentine feedstocks
Polysulfide rubber in primary form for sealants
Polysulfone pellets for injection molding
Chlorinated synthetic rubber in primary form
Aromatic thermoplastic resin pellets for compounding
Aromatic thermosetting resin in bulk for laminates

How to choose the right subheading

Product family: whether the resin is a petroleum, coumarone, indene or coumarone-indene resin or a polyterpene, which points to 3911.10
Whether the product is poly(1,3-phenylene methylphosphonate), which is named separately in 3911.20
Whether the product is elastomeric, which gives the free rate line 3911.90.10.00
Whether monomer units are aromatic or modified aromatic, or derived from such units, which opens the 3911.90.15 to 3911.90.45 group
Whether the resin is thermoplastic or thermosetting, and whether it is a named chemical in the heading text

Often confused with

Epoxy resins in primary forms
Epoxide resins have their own dedicated heading, so they do not fall in 3911.
Heading 3907
Polyurethane in primary forms
Polyurethanes are classified as amino-resins and polyurethanes in heading 3909.
Heading 3909
Polyethylene pellets
Polymers of ethylene are covered by heading 3901.
Heading 3901
Polyamide resin pellets
Polyamides in primary forms are classified in heading 3908.
Heading 3908
Polystyrene in primary forms
Polymers of styrene go to heading 3903, not to the residual specialty resin heading.
Heading 3903

Frequently asked questions

What is the HTS code for petroleum resins and polyterpene resins?

Petroleum resins, coumarone, indene or coumarone-indene resins and polyterpenes are classified under 3911.10.00.00. The general (MFN) duty rate for that line is 6.1%.

What is the duty on aromatic thermoplastic resins in primary forms?

Aromatic or modified aromatic thermoplastic resins of heading 3911, other than the named chemical in 3911.90.15.00, fall under 3911.90.25.00. The general (MFN) duty rate for that line is 6.1%.

How do I classify chlorinated synthetic rubber in primary form?

Chlorinated synthetic rubber is named in 3911.90.70.00, since it is an other product of the heading that is not aromatic-based. The general (MFN) duty rate for that line is Free.

Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.