What makes a polyester resin unsaturated?
Unsaturated polyesters are condensation polymers formed by the reaction of polyols (also known as polyhydric alcohols), organic compounds with multiple alcohol or hydroxy functional groups, with unsaturated and in some cases saturated dibasic acids.
What are some examples of where polyester resins are used in construction?
Applications of Polyester Resin Classic examples of fibreglass linings, coatings and moulds include, but are not limited to storage tanks, pipes, automotive components and marine components (e.g., boat and yacht hulls and decks) as well as fibreglass roof materials and associated fibreglass repair kits.
Does UV cure polyester resin?
UV Solar Cure poly resin contains a curing catalyst that is activated by UV rays from the sun or ultra-violet bulbs. Water clear polyester resin cures in about 3 minutes when exposed to sunlight. Take as much time as you need to laminate and hotcoat in a shaded area and bring the board into the sunlight to cure.
What is saturated and unsaturated polyester?
The key difference between saturated and unsaturated polyester resin is that the saturated polyester resins have no double bonds in their main chain whereas the unsaturated polyester resins have double bonds in their main chain.
Does polyester resin yellow over time?
The shelf life of polyester resin is about 6 months – 1 year. Polyester resin is UV resistant and does not need to be top coated to prevent yellowing or degradation from sunlight. Once cured, polyester resin is water permeable, meaning water can pass through it eventually.
Why is resin so expensive?
Epoxy resins are expensive because they’re made with high-priced raw materials, require trained labor and precision, need costly marketing, and are often made in countries where all of the above cost more. In addition, these resins are sold in large quantities, which drives their price further up.