Hardeners aircraft industry

Guin JD, Work WJ (1995) Plastics Epoxy resins. In Guin JD (ed) Practical contact dermatitis. A handbook for the practitioner. McGraw-Hill, Inc., USA, pp 433-446 Handley J, Burrows D (1994) Dermatitis from hexavalent chromate in the accelerator of an epoxy sealant (PR1422) used in the aircraft industry. Contact Dermatitis 30 193-196 Hansson C (1994) Determination of monomers in epoxy resin hardened at elevated temperature. Contact Dermatitis 31 333-334... 

The vulcanised carborane-siloxane rubber [530] has an unusual degree of thermal stability it does not show any persistent changes after 100 h at 250 °C in the open air. Hot-hardened rubbers are used mainly in electrical engineering and the aircraft industry. Those intended for medical applications may be vulcanised under radiation without a catalyst. 

Silicon rubber products are widely used in aircraft, automobile, shipbuilding and electrical industries, as well as in electronics, farmaceutics and medicine (mitral valves, etc.). Rubber compounds based on SKT, SKTV, SKTV-1 and SKTE can be used without hardening they are extruded and molded. They can function in any climatic conditions. The... 

The mechanical properties of titanium are comparable with those of steel it is more difficult to fabricate owing to the readiness with which it takes up, and is hardened and embrittled by, oxygen and nitrogen. Its strength, lightness, resistance to corrosion and the low thermal expansion have led to its employment in high-speed aircraft, naval and military projects and chemical research and industry. 

One-component epoxy resin adhesives are almost limited to industrial use (car manufacture, aircraft construction, electronics). Resin and hardener components are already mixed, due to special formulations, however, they are prevented from reacting with each other at room temperature and thus from curing (blocking, Section 3.1.4). 

USE In manuf of alloys, especially lithium-hardened bearing metals as a getter" in vacuum tubes. In making catalysts for the polyolefin plastics industry, in fuels for aircraft and missiles. Lithium salts are used in porcelain enamels, in air-conditioning, and for making multi-purpose greases. Human Toxicity Li ion may injure kidneys, especially if sodium intake is limited. 

A generation of new aluminum-lithium alloys have been developed recently for use by the aircraft and aerospace industries. These materials have relatively low densities (between about 2.5 and 2.6 g/cm ), high specific moduli (elastic modulus-specific gravity ratios), and excellent fatigue and low-temperature toughness properties. Furthermore, some of them may be precipitation hardened. However, these materials are more costly to manufacture than the conventional aluminum alloys because special processing techniques are required as a result of lithium s chemical reactivity. 

---