of mineral filler (talc) (CAS No. 9003–07–0) (provided for in subheading 3902.10.00) Free No change No change On or before 12/31/2020 . 954. Polyisobutylene: other Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.66 Poly(isobutylene) hydroformylation products, reaction products with ammonia (CAS No. 337367–30–3) (provided for in subheading 3902.20.50) 5.4% No change No change On or before 12/31/2020 . 955. Polyisobutylene Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.67 Poly(2-methylpropene) (polyisobutylene), other than elastomeric (CAS No. 9003–27–4) (provided for in subheading 3902.20.50) 5.5% No change No change On or before 12/31/2020 . 956. Propylene-ethylene copolymer Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.68 Poly(propylene-co-ethylene) (CAS No. 9010–79–1) (provided for in subheading 3902.30.00) 6.0% No change No change On or before 12/31/2020 . 957. Methoxysilanated amorphous poly alpha olefin Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.69 Silane, ethenyltrimethoxy-, reaction products with 1-butene-ethylene-propene polymer (CAS No. 832150–35–3) (provided for in subheading 3902.30.00) Free No change No change On or before 12/31/2020 . 958. Amorphous alpha olefin with high softening point Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.70 Poly(propylene-co-1-butene-co-ethylene) (CAS No. 25895–47–0) (provided for in subheading 3902.30.00) Free No change No change On or before 12/31/2020 . 959. Polymethylpentene (PMP) polyolefin copolymer Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.71 C 12 -C 18 alkenes, polymers with 4-methyl-1-pentene (CAS Nos. 25155–83–3, 81229–87–0 and 103908–22–1) (provided for in subheading 3902.90.00) Free