Epoxy-cured 70:30 polyester resin with excellent leveling property and solvent resistance and preparation method thereof
A polyester resin and solvent-resistant technology, applied in epoxy resin coatings, polyester coatings, powder coatings, etc. Problems such as leveling on the surface of the film, to achieve the effect of high cross-linking density, excellent leveling, and prolonging the gelation time
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Embodiment 1
[0032] An epoxy-cured 70:30 polyester resin with excellent leveling properties and solvent resistance, its raw material composition and molar ratio are:
[0033]
[0034]
[0035] A method for preparing the excellent epoxy curing 70:30 polyester resin of above-mentioned leveling property and solvent resistance, comprising the following steps:
[0036] A. Add the formulated amount of 1,9-nonanediol, neopentyl glycol and 1,2,6-hexanetriol into the reaction kettle, heat and melt below 125°C, stir and mix evenly;
[0037]B. Add the formulated amount of terephthalic acid and catalyst to the above mixture, slowly raise the temperature to 170°C at a heating rate of 5°C / h and keep it warm for 2 hours. When the esterification water is not obvious, start the vacuum and keep the vacuum degree at React for 2 hours under the condition of 70mmHg, then remove the vacuum, add the formulated amount of tetradecanedioic acid, polyethylene glycol trimethoxysilyl propyl ether and glyceryl mo...
Embodiment 2
[0042] An epoxy-cured 70:30 polyester resin with excellent leveling properties and solvent resistance and a preparation method thereof, the raw material composition and molar ratio are:
[0043]
[0044] Its preparation method etc. are the same as embodiment 1.
[0045] The acid value of the prepared polyester resin is: 31 mgKOH / g, and the melt viscosity (200° C.): 4075 mPa·s.
Embodiment 3
[0047] An epoxy-cured 70:30 polyester resin with excellent leveling properties and solvent resistance and a preparation method thereof, the raw material composition and molar ratio are:
[0048]
[0049]
[0050] Its preparation method etc. are the same as embodiment 1.
[0051] The acid value of the prepared polyester resin is: 38 mgKOH / g, and the melt viscosity (200° C.): 3820 mPa·s.
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