; and polyethylene glycol (CAS No. 25322–68–3) (provided for in subheading 3907.20.00) Free No change No change On or before 12/31/2020 . 999. High-performance dispersant used in concrete Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.13 Oxirane, 2-methyl-, polymer with oxirane, monoether with 1,2-propanediol mono(2-methyl-2-propenoate) (CAS No. 220846–90–2) (provided for in subheading 3907.20.00) Free No change No change On or before 12/31/2020 . 1000. Solvera PT 5045, Solvera XPH723 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.14 Mixtures of approximately 20 percent or less diphosphoric acid, polymers with ethoxylated reduced methyl esters of reduced polymerized oxidized tetrafluoroethylene (CAS No. 200013–65–6) and less than 10 percent 2-(2-methoxypropoxy)-1-propanol (CAS No. 34590–94–8), remaining content is water (provided for in subheading 3907.20.00) 0.3% No change No change On or before 12/31/2020 . 1001. Heat-curable epoxy resin mixture Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.15 Heat-curable epoxy resin mixture containing more than 30 percent by weight of 4,4′-(9H-fluorene-9,9-diyl)bis(2-chloroaniline) (CAS No. 107934–68–9) as a curing agent (provided for in subheading 3907.30.00) 0.3% No change No change On or before 12/31/2020 . 1002. Liquid resin known as Chemitylene or TC-2 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.16 Mixtures of ethanaminium, 2-hydroxy-N-(2-hydroxyethyl)-N,N-dimethyl-, methyl sulfate (1:1), polymer with 2-(chloromethyl)oxirane, 1,3-diisocyanatomethylbenzene, a-hydro-w-hydroxypoly[oxy(methyl-1,2-ethanediyl)] and 1,2,3-propanetriol (CAS No. 82294–81–3); Phenol, 4,4′-(1-methylethylidene)bis-, polymer with 2-(chloromethyl)oxirane (CAS No. 25068–38–6)