18
(c) Boron compounds and mixtures, excluding pharmaceutical specialtics
packaged för retail sale, the following—
(i) Boron trichloride and ha complexes, boron trifluoride and iss complexes!
(11) Fluorobotic acids; ammonium, potassium and sodium fluoro- borales:
(ii) Boron carbide, hydrides and nitride;
(iv) Boric acid esters:
(v) Alloys, compounds and mixtures containing 3% or more of boron, free or combined, including-
(1) Baron minerals, including but not limited to Colemanite, Rasorite and Ulexite, crude or refined;
(2) Boric acids; ammonium, calcium, magnesium, potassium and sodium borales; boric oxides;
(3) Enamel and glass-making compositions or mixtures containing more than the equivalent of 30% 10,
4. Diethylene triamine.
5. Pentaerythritol tetranitrate.
6. Silicone fluids and greases, as follows---
(0) Halogenated silicone duids;
(b) Lubricating greases capable of operating at temperatures of 356°F. (180°C) or higher and having a drop "point of "428*F. (220°C) or higher.
7. Compounds and metallic materials, as follows-
(a) Silicon of a purity of 99.99% or more, and all monocrystalline silicon:
(6) Monocrystalline gallium compounds in any form;
(c) Monocrystalline indium compounds in any form;
(d) Gailium metal alloys sud amalgams (except amalgams for dental or
medical use).
8. Tantalum, nioblum (columbium), and taotslum-niobium compounds.
9. Fluoro carbon compounds and manufactures, not elsewhere specified, as
follows---
(e) Monomers, homopolymers and co-polymers as follows-*-*-
(1) Tetrafluoroethylene and polytetrafluoroethylene;
(ii) Chlorotrifluoroethylene and polychloromifluoroethylene;
(ili) Polyvinylfluoride;
(iv) Polyvinylidenefluoride;
(v) Polyperfluorobut-2-ene;
(vi) Polychloropentafluorobutadiene;
(vii) Co-polymer of tetrafluoroethylene and hexafluoropropylene; (viii) Co-polymer of tetrafluoroethylene and chlorotrifluoroethyleno; (x) Co-polymer of chlorotrifluoroethylene and vinylidenefluoride: (x) Co-polymer of chlorotrifluoroethylene and vinylfluoride;
(xi) Co-polymer of chlorotrifluoroethylene and chloropentafluoro- butadiene:
(xii) Co-polymer of hexafluoropropylene and vinylidenesluoride; (xlü) Polybromotrifluoroethylene;
19
(xiv) Co-polymer of brometrifluoroethylene and chlorotrifluoro- ethylene:
(xv) Dibromotetrafluoroethane;
(6) Manufactures made wholly of the materials in (a) above;
(c) Electric wire and cable coated with or insulated with any of the
materials in (a) above.
10. Continuous yarns, rovings and tapes for filament wound structures, which after having been on a roll bave all of the following characteristics when measured at a temperature of 68°F. (20°C) and at 65% relative humidity- (4) Consisting of monofilaments 12 microns or less in diameter; (b) Modulus of elasticity greater than 11 x 106 p.s). (7,700 hectobars); (c) Tensile strength of density ratio,
(Tensile strength) X
2.55 specific gravity
greater than 350,000 p.s.l. (245 bestobars).
11. Plastics substances and manufactures thereof, as follows--
(0) Polypyromellitimide;
(b) Polybenzimidazole.
GROUP L
PETROLEUM PRODUCTS.
1. Any liquid fuel, including petroleum products, having a gross calorific value of not less than 13,000 calories/grammes (23,400 B. TH.U/lb.) which của- Lains high energy components or compounds.
2. Tetra-ethyl-lead-fluid.
3. Synthetic rubber, all types.
4. Syathetic lubricating oils and greases which contain as the principal in-
gredient-
(a) Esters of saturated aliphatic monohydric alcohols containing more tha
six carbon atoms with adipic or aælic or sebacic acids;
(6) Esters of bimethylol propane or trimethylol ethane or pentaerythrital with saturated monobasic acids containing more than six carbon atoms; (c) All fluoro-alcohol esters;
(d) All polyphenyl ethers containing more than 3 phenyl groups.
GROUP J.
MISCELLANEOUS.
1. Synthetic film for dielectric use (condenser tissue) of 0,0015 (n. (0.038 muo.)
or less in thickness.
GROUP K.
ARMS, MUNITIONS, MILITARY EQUIPMENT AND MACHINERY SPECIALLY DESIGNED FOR THEIR PRODUCTION.
1. Specialized machinery, equipment and gear specially designed for the exam. - ination, manufacture, testing and checking of the arms, ammunition, appli- auces and machines referred to in this Group.