;styrene (CAS No. 25767–47–9) (provided for in subheading 3906.90.50) Free No change No change On or before 12/31/2024 . 4693. Copolymer for dental use Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.06 Reacted copolymer of itaconic and acrylic acids, containing by weight over 90 percent 2-propenoic acid polymer with methylenebutanedioic acid, and also containing ethyl acetate and tetrahydrofuran (CAS No. 25948–33–8) (provided for in subheading 3906.90.50) Free No change No change On or before 12/31/2024 . 4694. Vinyl phosphonic acid, acrylic acid copolymer, 20 percent solution in water Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.07 2-Propenoic acid, polymer with p-ethenylphosphonic acid, 20 percent solution in water (CAS No. 27936–88–5) (provided for in subheading 3906.90.50) Free No change No change On or before 12/31/2024 . 4695. Polyacrylate 33 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.08 Mixtures of polyacrylate 33 (methyl methacrylate, polymers with ethyl acrylate, polyethylene glycol methacrylate C16–22-alkyl ethers and polyethylene-polypropylene glycol methacrylate 2-(6,6-dimethylbicyclo[3.1.1]hept-2-en-2-yl)ethyl ether) (CAS No. 1204525–16–5) and alcohols, C10–16, ethoxylated, sulfates, ammonium salts (CAS No. 67762–19–0) (provided for in subheading 3906.90.50) Free No change No change On or before 12/31/2024 . 4696. AA/AMPS copolymer Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.09 Acrylic acid-2-acrylamide-2-methyl propanesulfonic acid copolymer (prop-2-enoic acid