How Are Resins Classified?

 Resins are chemical substances that come in many varieties. They are widely used in both light and heavy industry, where they help solve various challenges and meet the demands of daily production. Resins can be classified in many different ways, depending on their specific application.

  Classification of Resins:

  1. According to the synthesis reaction, resins can be classified into addition polymers and condensation polymers.

  Addition polymers are polymers produced by addition polymerization reactions, in which the chemical formula of the chain structure is identical to the molecular formula of the monomer, such as polyethylene, polystyrene, and polytetrafluoroethylene. Condensation polymers are polymers produced by condensation polymerization, in which the chemical formula of the structural unit differs from the molecular formula of the monomer, such as phenolic resins, polyester resins, and polyamide resins.

  2. Classification based on the composition of the resin’s main chain: Using this method, resins can be divided into carbon-chain polymers, heterochain polymers, and elemental organic polymers.

  Gel coat resin companies define carbon-chain polymers as polymers whose main chains consist entirely of carbon atoms, such as polyethylene and polystyrene. Heterocyclic polymers are polymers whose main chains consist of atoms from two or more elements, such as carbon, oxygen, nitrogen, and sulfur; examples include polyformaldehyde, polyamide, polysulfone, and polyether. Elemental organic polymers are polymers whose main chains do not necessarily contain carbon atoms and are primarily composed of atoms of elements such as silicon, oxygen, aluminum, titanium, boron, sulfur, and phosphorus, such as organosilicon compounds.