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A syringe of "5-minute" epoxy glue, containing separate compartments for the epoxy resin and the hardener Structure of the epoxide group, a reactive functional group present in all epoxy resins. Epoxy is the family of basic components or cured end products of epoxy resins.
J-B Weld epoxy is a two-part adhesive that can bond various surfaces and withstand high temperatures up to 500 °F (260 °C) constantly and 600 °F (316 °C) for short periods. It is water-resistant, petroleum/chemical-resistant, acid-resistant, and resists shock, vibration, and temperature fluctuations.
The coated joints are then allowed to stand for between 30 minutes and 72 hours, then the components are brought together under elevated pressure and temperature. The curing process is by condensation and a typical figure for Redux Liquid 775/Powder 775 is 30 minutes at 293 °F (145 °C) under a pressure of 100 psi (690 kPa).
Essential components of a powder coating are: [5] Resin. Hardener or curing agent. Fillers and extenders. Colour pigments. The resin and hardener part together is known as the "Binder". As the name indicates, in Fusion bonded epoxy coatings the resin part is an "epoxy" type resin.
Using lightweight rocket material, ISRO has developed a low-cost heart pump that assists the human heart, notably in cases of left ventricle failure. The device is composed of a special bio-compatible titanium alloy and can pump 3-5 litres of blood every minute. It has been experimented on animals and it was found to be successful. [6]
The epoxy value is defined as the number of moles of epoxy group per 100g resin. So as an example using an epoxy resin with molar mass of 382 and that has 2 moles of epoxy groups per mole of resin, the EEW = 382/2 = 191, and the epoxy value is calculated as follows: 100/191 = 0.53 (i.e. the epoxy value of the resin is 0.53). [6]
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