Unsaturated polyester resin-Iota

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Service > Unsaturated polyester resin

Unsaturated polyester resin

Unsaturated polyester resin is the earlier use of light cured resin. It is composed of unsaturated dicarboxylic acid (or acid with > mixed with partially saturated dicarboxylic acid (or acid with > and diol in the initiation reaction agent is produced under the action of linear polyester. The existence of vinyl monomer of unsaturated in its molecular structure, if the use of vinyl monomers and lively with this class of unsaturated vinyl monomer copolymerization, then even the curing and become body structure. From this kind of resin adhesive due to volume shrinkage during curing, the adhesive joint big stress, layer internal prone to micro crack and cause gum relay becomes small; at the same time as the polymer chain containing ester bond in acid, alkali, hydrolysis, and solvent resistance and water resistance is poor, easy deformation in the temperature and humidity of the environment, in addition the curing speed is slow, therefore the comprehensive performance is poor. The majority of non structural adhesive used as. By reducing the unsaturated bond content, using the monomer polymerization shrinkage of small, inorganic filler and a thermoplastic polymer to join, can improve the whole performance of the sun. Its advantage is low prices, there are still used in wood decoration. On the other hand, because a lot of synthetic raw materials, can be made from hard until very soft resin, only a single body can add less to obtain low viscosity, easy operation. So far the European market and its dosage also accounted for 24% of the total amount of light cured resin.

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