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Resin

Resin is an organic, semi-solid or solid material produced by union (through polymerization or condensation) of a large number of molecules of one or two relatively simple compounds. Properties vary widely with the raw materials, their proportions and the conditions of formulation of the resin. Resins are broadly classified as thermoplastic or thermosetting according as they soften or harden with the application of heat.

Listed below are some of the synthetic resins classed by their derivation:

  1. Modification of natural polymers, e.g., chlorinated rubber, cellulose acetate, casein and ester gums.
  2. Resins formed by polymerization (union of small molecules without formation of water or some other simple molecule as a by-product), e.g., acrylate resins, polystyrene, vinylidene resins, etc.
  3. Resins derived by condensation (union of small molecules with the formation of water or some other simple molecule as a by-product), e.g. alkyd resins, q.v., epoxy resins, q.v., phenolic resins, polyurethane resins, urea-formaldehyde resins, q.v., etc.

Viscosity: Varies from a few hundred cPs. to several thousand cPs. depending on particular resin

Remarks: Additives such as solvents, blowing agents, abrasive solids, etc. are often mixed with various resins to provide an almost endless variation to the end product. Resins have a broad range of application for such things as paints, protective coatings "plastic" parts, potting materials, hot melts, foam, adhesives, etc. See specific resins by name for additional uses.

Pump Notes: Construction recommendation depends on the individual resin. Additives can affect pump recommendation. Some resins are shear and/or heat sensitive; reduced speeds, cooling jackets, etc., may be helpful.