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Effective Period Rates of Duty Unit of Quantity Article Description Stat. Suf- fix Heading/ Subheading 2 1 Special General 1,6-diisocyanatohexane; 2,4-diisocyanato-1-methylbenzene polymer (CAS No. 26426-91-5) in n-butyl acetate (provided for in subheading 3911.90.45) ................................................... 1/ 9902.11.46 On or before 12/31/2020 No change No change Free 1/ Poly(toluene diisocyanate) (CAS No. 26006-20-2) (provided for in subheading 3911.90.45).................................................... 1/ 9902.11.47 On or before 12/31/2020 No change No change Free 1/ Water-dispersible polyisocyanate products based on poly(hexamethylene diisocyanate) (CAS No. 28182-81-2) and dimethyldicyclohexylamine compounds with 3-(cyclohexylamino)-1-propanesulfonic acid-poly(1,6-diisocyanatohexane) (CAS No. 666723-27-9) (provided for in subheading 3911.90.90)................................... 1/ 9902.11.48 On or before 12/31/2020 No change No change Free 1/ Poly(1,6-diisocyanatohexane)-block-polyethylene-block-poly (1-butoxypropan-2-ol) (CAS no. 125252-47-3) (provided for in subheading 3911.90.90) ......................................................... 1/ 9902.11.49 On or before 12/31/2020 No change No change Free 1/ N,N',N''-[(2,4,6-Trioxo-1,3,5-triazine-1,3,5(2H,4H,6H)-triyl) tris [methylene(3,5,5-trimethyl-3,1-cyclohexanediyl)]] tris [hexahydro-2-oxo-1H-azepine-1-carboxamide] (CAS No. 68975-83-7) in organic solvent (provided for in subheading 3911.90.90)................................................................................... 1/ 9902.11.50 On or before 12/31/2020 No change No change Free 1/ 3,5-Dimethyl-1H-pyrazole-oligo(hexamethylene diisocyanate) in solvents (CAS No. 163206-31-3) (provided for in subheading 3911.90.90)................................................................................... 1/ 9902.11.51 On or before 12/31/2020 No change No change Free 1/ α-Alkenes, C14-C20, polymers with maleic anhydride, 2-(1-piperazinyl) ethylimides, plasticized with diisononyl phthalate (CAS No. 28553-12-0) and bis(1-methylethyl)-naphthalene (CAS No. 38640-62-9) (provided for in subheading 3911.90.90)................................... 1/ 9902.11.52 On or before 12/31/2020 No change No change Free 1/ 2,4-Diisocyanato-1-methylbenzene; 5-(1,3-dioxo-2-benzofuran-5-carbonyl)-2-benzofuran-1,3-dione; 1-isocyanato-4-[(4-isocyanatophenyl)methyl]benzene (CAS No. 58698-66-1) (provided for in subheading 3911.90.90) ..... 1/ 9902.11.53 On or before 12/31/2020 No change No change Free 1/ Poly(ethylene-ran-(2-norbornene)) (CAS No. 26007-43-2), comprising 64 (plus or minus 3) percent by weight ethylene (CAS No. 74-85-1), having a glass transition temperature of 78 (plus or minus 4) °C, and containing not less than 3 percent by weight polyethylene (CAS No. 9002-88-4) (provided for in subheading 3911.90.90).............................................................. 1/ 9902.11.54 On or before 12/31/2020 No change No change Free 1/ 1,6-Hexanediamine, N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)-polymer with 2,4,6-trichloro-1,3,5-triazine, reaction products with N-butyl-1-butanamine and N-buty-2,2,6,6-tetramethyl-4-piperidinamine (CAS No. 192268-64-7)(provided for in subheading 3911.90.90) .......... 1/ 9902.11.55 On or before 12/31/2020 No change No change Free 1/ 1/ See chapter 99 statistical note 1. Rates of Duty 1 Harmonized Tariff Schedule of the United States Revision 15 (2026) Annotated for Statistical Reporting Purposes XXII 99 - II - 90 Note:The shaded areas indicate the provision has expired