coating (provided for in subheading (3824.90.92) Free No change No change On or before 12/31/2020 . 936. Organo-modified siloxanes combined with silica Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.48 Mixtures containing 88 percent or more by weight of poly[oxy(dimethylsilanediyl)] bis[omega-butoxypoly(oxypropylene)] ether (CAS No. 67762–96–3), 8 percent or less by weight α-butyl-ω-hydroxylpoly(oxypropylene) (CAS No. 9003–13–8) and less than 4 percent by weight silica dimethylsilylate (CAS No. 68611–44–9) (provided for in subheading 3824.90.92) 1.4% No change No change On or before 12/31/2020 . 937. Aminonitrile Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.49 Mixtures of 2-amino-2,3-dimethylbutanenitrile (CAS No. 13893–53–3) and toluene (provided for in subheading 3824.99.28) Free No change No change On or before 12/31/2020 . 938. Light stabilizer/UV-absorber for coatings Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.50 Preparations based on N-(2-ethoxyphenyl)-N′-[4-(10-methylundecyl)phenyl]ethanediamide (CAS No. 82493–14–9) (provided for in subheading 3824.99.28) Free No change No change On or before 12/31/2020 . 939. Akolidine