Products used principally for rubber processing
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Duty Rate (from China)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 2930.90.92.31
N-Cyclohexyl-2-benzothiazole sulfenamide (CBS)
CBS is an organo-sulfur compound used as a delayed-action accelerator in rubber vulcanization, providing optimal processing safety and fast curing properties. It falls under HTS 2930.90.92.31 because it is a benzothiazole sulfenamide specifically designed for rubber processing, matching the chapter's classification for organo-sulfur compounds used principally in this application.
Zinc Dibenzyl Dithiocarbamate (ZBEC)
ZBEC serves as a super-accelerator for low-sulfur vulcanization systems in rubber compounds, offering rapid curing at low temperatures. Classified under HTS 2930.90.92.31 as an organo-sulfur dithiocarbamate derivative principally used in rubber processing per Chapter 29 organo-sulfur provisions.
Tetramethylthiuram Disulfide (TMTD)
TMTD functions as both an accelerator and sulfur donor in rubber vulcanization, particularly effective in EPDM and low-sulfur compounds. It qualifies for HTS 2930.90.92.31 as a thiuram disulfide organo-sulfur compound whose principal use is rubber processing, consistent with chapter notes.
2-Mercaptobenzothiazole (MBT)
MBT is a primary rubber accelerator used in acidic and neutral compounding systems, providing good aging properties. As a benzothiazolethiol organo-sulfur compound principally for rubber processing, it falls under HTS 2930.90.92.31 per Chapter 29 definitions.
Zinc 2-Mercaptobenzothiazole (ZMBT)
ZMBT acts as a medium-speed rubber accelerator with excellent dispersion properties, used in tire and mechanical goods production. Classified in HTS 2930.90.92.31 as its organo-sulfur metal coordination compound principal use is rubber vulcanization per chapter coordination compound rules.
N-Oxydiethylenebenzothiazole-2-Sulfenamide (NOBS/MBS)
NOBS provides delayed vulcanization with rapid curing rates, ideal for thick rubber articles like tires. This sulfenamide's principal rubber processing function places it under HTS 2930.90.92.31 as a chemically defined organo-sulfur compound.
Dipentamethylenethiuram Tetrasulfide (DPTT)
DPTT functions as both sulfur donor and accelerator in low-sulfur rubber systems, particularly for heat-resistant compounds. As a thiuram polysulfide organo-sulfur compound for rubber processing, it classifies under HTS 2930.90.92.31.
Benzothiazyl Disulfide (MBTS)
MBTS serves as a retarder, secondary accelerator, and sulfur donor in rubber vulcanization systems. This organo-sulfur disulfide's predominant rubber processing role qualifies it for HTS 2930.90.92.31 classification.