What Is Polyester Resin

Polyester resin is a general term for polymer compounds formed by the condensation of binary alcohols, binary acids, polyols, and polybasic acids. Polyester resin is divided into saturated polyester resin and unsaturated polyester resin. Unsaturated polyester adhesive mainly consists of additives such as unsaturated polyester resin, pigments and fillers, initiators, etc. The adhesive has low viscosity, is easy to wet, and has good processability. The cured adhesive layer has high hardness, good transparency, high brightness, can be quickly cured under room temperature pressure, good heat resistance, and excellent electrical properties. The disadvantages are high shrinkage rate, low adhesive toughness, poor chemical medium resistance and water resistance, which are used for non structural adhesives. Mainly used for gluing fiberglass, hard plastics, concrete, electrical tank seals, etc.