Definition of polyester resins
Polyester resin is divided into saturated polyester resin and unsaturated polyester resin. Unsaturated polyester adhesive mainly consists of unsaturated polyester resin, pigments, fillers, initiators and other additives. Adhesive viscosity is small, Yi Runshi, process is good, the hardening of the adhesive layer hardness, transparency, gloss, high pressure at room temperature, fast curing, good heat resistance, good electrical performance. The disadvantages are high shrinkage, low adhesive toughness, poor chemical resistance and water resistance, and are used in non structural adhesives. Mainly used for adhesive glass fiber reinforced plastic, hard plastic, concrete, electric sealing and so on.
General polymer polyester resin by diols or polyols and dibasic acid or polybasic acid which is prepared by the.
Polyester resin is the abbreviation of unsaturated polyester adhesive. Unsaturated polyester adhesive mainly consists of unsaturated polyester resin, initiator, accelerator, filler, thixotropic agent and so on. A linear structure in the main chain containing -CH=CH- double bonds (see linear polymer) polyester resin with vinyl monomers, such as styrene, acrylate, vinyl acetate mixture, the initiator and accelerator at room temperature under the action of the synthesis of insoluble and infusible polymer products. Unsaturated polyester is abbreviated as UP. Mainly used in the production of coil coatings.
