epoxy resin problems

Bakelite is made from phenol and formaldehyde in the presence of a base catalyst. It involves formation of methylene bridges at the ortho and para positions. The reaction starts with the initial formation of ortho and/or para-hydroxymethyl phenol derivatives which further react with phenol to form ..

Giant organic molecules having acidic or basic groups are known as Ion-exchange resins. Acid resins contain the acid group (- COOH). Basic resins contain the basic group [(-NH )OH - ], i.e., substituted ammonium hydroxide group. Acid and basic ion exchange resins..

Reactant in the manufacture of formaldehyde resins like bakelite and galalith by catalytic condensation with phenol or casein (milk protein). The resin can be moulded while hot into different shapes under pressur..

A dihydric alcohol, ethanediol is prepared commercially by acid hydrolysis of epoxy ethane (ethylene oxide). ..

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A dihydric alcohol, ethanediol is prepared commercially by acid hydrolysis of epoxy ethane (ethylene oxide..

In rare cases, the entire organism may be preserved. This may happen if the dead bodies of the organisms have been frozen into ice during glaciation, encased in hardened resin or tar or trapped in acidic bogs (bogs are marshy areas where acidic conditions prevent any bacterial or fungal ..

It possesses excellent electrical insulating character and hence its major use in making electrical goods. Used to make combs, fountain pen barrels, gramophone records, electric goods, formica table tops. Sulphonated bakelites are used as ion exchange resins..

Static electricity was known to people more than 2500 years ago. The Greeks knew about the attractive property of the resin amber. They knew that by rubbing amber with cloth, it could be made to attract small feathers. The Greek name for amber was 'elektron..