How is polyester resin made?
How is polyester resin made?
Polyester resins are synthetic resins formed by the reaction of dibasic organic acids and polyhydric alcohols. Maleic Anhydride is a commonly used raw material with diacid functionality in unsaturated polyester resins. Polyesters are also used in anchor bolt adhesives though epoxy based materials are also used.
What are the ingredients in a polyester resin?
Today, polyester is prepared by reacting diethylene glycol, HO–CH2–CH2–OH, and an unsaturated aliphatic acid such as maleic acid, HOOC–CH=CH–COOH. The still-unsaturated polyester resin is then dissolved in an unsaturated, reactive solvent such as styrene or α-methyl styrene.
How is liquid polyester made?
Polyester fabric is a synthetic material made from the polymerization of petroleum-derived ethylene glycol and purified terephthalic acid, which meltdown to produce polyethylene terephthalate (PET).
What is difference between saturated and unsaturated polyester resin?
The key difference between saturated and unsaturated polyester resin is that the saturated polyester resin has no double bonds in its main chain but the unsaturated polyester resin has double bonds in the main chain.
What are the benefits of polyester formulations?
Polyester formulations offer tremendous flexibility. Physical properties are easy to tailor, driven primarily by the amount of glass reinforcement used. Fillers are easy to incorporate in polyesters and commonly used as resin extenders to meet design and cost targets. Properties can be formulated for your product specification targets.
What is polyester resin used for?
Polyester resins are the least expensive of the resin options, providing the most economical way to incorporate resin, filler and reinforcement. They are the primary resin matrix used in SMC (sheet molding compounds) and BMC (bulk molding compounds).
What is nneat polyester resin?
Neat polyester, resin without reinforcement, fillers or additives, is very brittle. The low viscosity of polyester resins allow for the addition of low profile agents, pigments, fillers and additives. This allows tremendous flexibility in polyester formulations.
What is therthermoset polyester resin?
Thermoset Polyester resins are created by combining an alcohol like ethylene glycol with an organic acid like maleic anhydride. The low viscosity and raw material cost of polyesters make the additions of filler and reinforcements a matter of practicality.
