Hexamethylene diamine Specifications

Nylon A class of synthetic fibres and plastics, polyamides. Manufactured by condensation polymerization of ct, oj-aminomonocarboxylic acids or of aliphatic diamines with aliphatic dicarboxylic acids. Also rormed specifically, e.g. from caprolactam. The different Nylons are identified by reference to the carbon numbers of the diacid and diamine (e.g. Nylon 66 is from hexamethylene diamine and adipic acid). Thermoplastic materials with high m.p., insolubility, toughness, impact resistance, low friction. Used in monofilaments, textiles, cables, insulation and in packing materials. U.S. production 1983 11 megatonnes. 

As stated earlier, the major metabolite of HDI in humans appears to be 1,6-hexamethylene diamine (HDA). No information was located in the available literature that specifically addressed the metabolism of HDI after inhalation, oral or dermal exposures. 

Materials. High density polyethylene (HDPE) having different molecular weights, and specific gravity of 0.951 (Marlex 5202, HXM 50100, made by Phillips 66 Co), were used for extrusion applications. Polyamides used were a semicrystalline copolyamide of adipic acid, hexamethylene diamine and caprolactam, and a copolyamide containing isophthalic acid as well. An anhydride modified polyethylene (3-5) as an interlaminar adhesive/compatibilizer was also used. The combinations are generally included in "Selar" barrier materials supplied by E. I. du Pont de Nemours Co. 

Hexamethylene Diamine Synonyms 1,6-Hexanediamine 1,6-Diaminohexane Hexamethylenediamine 1,6-Hexamethylenediamine CAS 124-09-4 Formula QH16N2 Molecular Weight 116.24 Chemical Class Aliphatic amine Physical Description Colorless solid or watery liquid with a weak ammonia odor Boiling Point 204.8°C Melting Point 42°C Flash Point 80.8 C Specific Gravity 0.799 60°C Water Solubility Freely Soluble. 

Specific preparations of polyamides containing units derived from A -malonic diesters of uracil and theophylline, aa -disubstituted adipate, succinate, and phenoxathiin have all been reported. A new water-soluble polyamide derived from ethylene glycol dimethoxycarbonylomethyl ether and hexamethylene-diamine has been described and conditions evaluated for the preparation of high molecular weight materials. 

Non-Specific Routes.— The preparation of ketone-containing polyamides has been investigated and their properties compared to systems of the normal type i28, 229 These polymers were prepared from hexamethylene diamine and keto-containing dicarboxylic acids and varying amounts of the keto function were introduced at random along the main chain yielding systems having enhanced photochemical lability. 

---