Teraphthalic acid

The mechanism of synthesis of these unsaturated polyesters was investigated. The influence of some parameters on the given viscosity and the outlet of polyesters was studied. The main parameters, which define the properties of polymers, received in conditions of p-type-catalytic polycondensation, are the nature of vehicle, the temperature and the duration of the metathesis, and also the concentration of initial substances. As a result of the conducted investigation the following conditions of synthesis of block-copoly sulfone on the basis of 1,1- dichlor-2,2 di(n-oxyphenyl) ethylene and 4,4 -dioxidephenylpropane, oligoarylensulfoneoxide OASO - 10D and mixture (50 50) dichloranhydride izo- and teraphthalic acids vehicle - 1,2-dichlorethane synthesis temperature is 20 °C synthesis duration is 1 hour, triethylamine s quantity - double spillover relative to bisphenols solution s concentration is 0,6 mole/1. 

PET is produced from teraphthalic acid and ethylene glycol, while PBT is made with butylene diol. The diacid is obtained by catalytic oxidation of para-xylene (a by-product of the petrochemical industry) while ethylene glycol is obtained from ethylene oxide (an oxidized derivative of ethylene).The terephthallic acid is preferably replaced by the ester dimethyl-terephthalate... 

Dacron or Terylene (a linear polyester based on teraphthalic acid). 

A preaccelerated, non-thixotropic, high reactive, teraphthalic acid resin suitable for automotive adhesive application where galvanised surfaces are invoived. 

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