Talk:Epoxy/Archive 2016

I Don't Believe the "Exact Ratio" Statement (which has no citations)

Article says:

Epoxy resins typically require a precise mix of two components which form a third chemical. Depending on the properties required, the ratio may be anything from 1:1 or over 10:1, but in every case they must be mixed in exactly the right proportions, and thoroughly to avoid unmixed portions.

But as a matter of fact, common ordinary persons, with no means of making exact ratios, use epoxy successfully every day. Most I have used have a 50/50 mix prescribed, but I know that I don't get 50/50 exact. So is there something I don't understand about the quoted claim? Or is it an exaggeration? "Exact ratios" are mostly theoretical and rarely occur in real life. So I think this statement should be deleted or revised. The question is, "How close do you have to come to the prescribed ratio?" And what happens to the properties of the mix as one deviates from the ratio in either direction (more part B hardener or more part A)? (68.94.201.73 (talk) 05:23, 22 January 2015 (UTC))

Cured Epoxies are the combination of two components, commonly known as Resin and Hardener. Mainly used hardeners are Aliphatic, Aromatic, Cycloaliphatic Amines, their Adducts, Amidoamines, Polyamides, Phenalkamines, Anhydrites and many others. Some of these are used in fixed ratios while others are used in variable ratios. They are used in variety of Industrial and household applications. For household applications mainly used as a glue or adhesive, Polyamides are quiet suitable, which can be used in ratio of 35% to 150% avoiding the hassles of exact mixing, and also are low toxic. For high performance industrial applications where tough service and reliability is required, other Hardeners are used. While Epoxies have hundreds of applications, Some of the Interesting applications are given Below: 1- Adhesives for household applications 2- High strength Adhesives for Automobile and Aircraft Industries 3- Boat Building 4- Surfing Board 5- Bowling Balls 6- Inside Can Coatings for Juices, soft drinks etc 7- Tennis and Badminton Rackets using Carbon Fibres 8- Transformer winding 9- Manufacture of Resistances, Capacitors and use as an encapsulators in Electrical and Electronic Industry. 10- Jewellery making 11- Construction Material Adhesives and various Coatings, Like Floor Coatings, Tarrazo, Electrical Insulation Coatings etc 12- Primers for Automotive and Aircrafts, Ships, Tanks and many 13- Acid and Chemical Resistant Coatings 14- Putties of various application, like Leakage Repairs, Metal Rebuilding, Protective coatings etc. ... ...

List Is Endless Sdeshmankar (talk) 04:34, 3 January 2016 (UTC)