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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]
The second most important part of FBE coatings is the curing agent or hardener. Curing agents react either with the epoxy ring or with the hydroxyl groups, along the epoxy molecular chain. Various types of curing agents, used in FBE manufacture, include dicyandiamide, aromatic amines, aliphatic diamines and organic acid anhydrides. [6]
Nash Paints is a paint company in Zimbabwe with interests in Southern Africa. [1] [2] As of 2017 the company had 20 branches throughout Zimbabwe with a plant that manufactures 50,000 litres (11,000 imp gal; 13,000 US gal) of paint a day. Tinashe Mutarisi is the founder and executive chairman of the company. [3] [4]
Epoxy is the family of basic components or cured end products of epoxy resins. Epoxy resins, also known as polyepoxides, are a class of reactive prepolymers and polymers which contain epoxide groups. The epoxide functional group is also collectively called epoxy. [1] The IUPAC name for an epoxide group is an oxirane.
Most coatings have four basic components. These are the resin, solvent, pigment and additive systems [5] but the resin or binder is the key ingredient. Continuing environmental legislation in many countries along with geopolitics such as oil production are ensuring that chemists are increasingly turning to waterborne technology for paint/coatings and since resins or binders are the most ...
According to the New York Times, here's exactly how to play Strands: Find theme words to fill the board. Theme words stay highlighted in blue when found.
Stocks and bonds are tumbling after the December jobs report came in much stronger than expected. Nonfarm-payroll additions smashed forecasts, while the US unemployment rate unexpectedly fell.
Over the subsequent decades, Zambia's economy contracted, in part due to declining copper prices. [22] Since the 2000s, Zambia's economy has been growing. [22] As of 2019, Zambia's GDP per capita (current international dollars) stands at $1,305.00. Zambia is one of Sub-Saharan Africa's most urbanized countries. About one-half of the country's ...
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