Ester gums
Rosin and resin acids, and derivatives thereof; rosin spirit and rosin oils; run gums: > Ester gums
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 3806.30.00.00
Glycerol Ester of Wood Rosin (Food Grade)
Glycerol ester of wood rosin is a pale, tack-free resin approved as a food additive (E445) for beverages and confections. It functions as an emulsifier in citrus oil beverages and as a masticatory substance in chewing gum. Classified under HTS 3806.30.00.00 due to its derivation from wood rosin esterified with glycerol.
High-Softening Point Penta Rosin Ester
High-softening point pentaerythritol rosin ester (130-110°C ring & ball) provides heat resistance in tire cord adhesives and tape formulations. Derived from disproportionated tall oil rosin for color stability. Classified as ester gum under HTS 3806.30.00.00.
Liquid Methyl Ester Gum for Printing Inks
Liquid methyl ester gum serves as a solvent-free plasticizer in lithographic and gravure printing inks. Its low viscosity enables high pigment loading without tack buildup. HTS 3806.30.00.00 includes these rosin-derived liquid ester gums.
Chewing Gum Base Ester Gum
Ester gum from glycerol-rosin esters provides chew elasticity and flavor release in gum base formulations. Water-insoluble nature maintains gum cohesion during mastication. Falls under HTS 3806.30.00.00 as purified rosin ester derivative.
Pentaerythritol Ester of Tall Oil Rosin
Pentaerythritol ester of tall oil rosin is a high-viscosity synthetic resin produced by esterifying tall oil rosin acids with pentaerythritol. It is widely used as a tackifier in adhesives, hot-melt glues, and pressure-sensitive tapes. This product falls under HTS 3806.30.00.00 as it is specifically classified as an ester gum derived from rosin acids.
Methyl Ester of Rosin (Methyl Rosinate)
Methyl ester of rosin, also known as methyl rosinate, is a low-viscosity liquid resin formed by esterifying rosin acids with methanol. It serves as a plasticizer in inks, coatings, and synthetic rubber compounds. HTS 3806.30.00.00 applies as it is a direct derivative of rosin acids via esterification.
Triethylene Glycol Ester of Rosin
Triethylene glycol ester of rosin is a soft, tacky resin used in hot-melt adhesives and bookbinding glues. Its polyol esterification provides flexibility and low melt viscosity. Falls under HTS 3806.30.00.00 as an ester gum from rosin and resin acids.
Food-Grade Ester Gum for Soft Drinks
Food-grade ester gum, typically glycerol or pentaerythritol rosin esters, stabilizes citrus oils in carbonated beverages. It prevents oil separation and enhances mouthfeel without affecting flavor. HTS 3806.30.00.00 covers these purified ester gums meeting FCC standards.