Tuesday, April 15, 2008

Synthetic Resin Definition

Synthetic Resin Definition

Synthetic resins are materials with similar properties to natural resins—viscous liquids capable of hardening. They are typically manufactured by esterification or soaping of organic compounds. The classic variety is epoxy resin, manufactured through polymerization-polyaddition or polycondensation reactions, used as a thermoset polymer for adhesives and composites. One more category, which constitutes 75% of resins used, is unsaturated polyester resin. Ion exchange resin is another important class with application in water purification and catalysis of organic reactions. See also AT-10 Resin, melamine resin.


The hard transparent resins, such as the copals, dammars, mastic and sandarac, are principally used for varnishes and cement, while the softer odoriferous oleo-resins (frankincense, elemi, turpentine, copaiba) and gum resins containing essential oils (ammoniacum, asafoetida, gamboge, myrrh, and scammony) are more largely used for therapeutic purposes and incense.

Resin in the form of rosin is used for the upkeep of bows for stringed instruments (i.e. violin, viola, cello, double bass), because of its quality for adding friction to the hair. Ballet dancers may apply crushed rosin to their shoes to increase grip on a slippery floor.

Resin has also been used as a medium for sculpture by artists such as Eva Hesse, and in other types of artwork.

Also, resin is used in some skateboard decks. It makes the skateboard more durable, making it less likely to get pressure cracks, chippings, or break in half.

In Pompeii, resin is now used instead of plaster to recreate the bodies of Mount Vesuvius' victims, because it is more durable.

Akira Ifukube, who wrote and composed the music to numerous Godzilla films, also created Godzilla's roar by rubbing a resin-covered leather glove over the loosened strings of a double bass.

Resin is Also used to Make ball Jointed dolls known as Dollfie