A kind of organic composite heat stabilizer and preparation method thereof
A composite thermal stabilizer, organic technology, applied in the field of composite materials, can solve the problems of accelerated PVC decomposition, short-acting thermal stabilizer, poor stability, etc., to achieve the effect of reducing dust, excellent static thermal stability, and improving thermal stability.
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Embodiment 1
[0054] Add 0.1mol sodium metal to 100ml absolute ethanol, stir and reflux for 0.5h to prepare a concentrated sodium ethylate / ethanol solution; 0.1mol urea, 0.2mol cyanoacetic acid, and 0.1mol acetic anhydride are reacted and refluxed for 40min at 80°C in a 500ml three-necked flask Finally, add 100ml of the prepared concentrated sodium ethylate / ethanol solution and continue to heat and reflux for 3h, then slowly add hydrochloric acid solution dropwise to adjust the pH to 7, then add 0.1mol of stearic acid until it completely melts and dissolves; after raising the temperature to 95°C, Slowly add 0.1mol of zinc chloride dropwise, and then stir for 2.5h after dropping, after cooling to room temperature, filter the product with suction, soak and wash with water mist, dry at 80-90°C to constant weight, and prepare N,N-di Methyl-6-aminouracil zinc salt, yield 83%.
[0055] Convert the anion to CO 3 2- 0.95 kg of hydrotalcite, 0.05 kg of bisphenol A epoxy resin (E44) with an epoxy v...
Embodiment 2
[0058] Add 0.1mol sodium metal to 100ml absolute ethanol, stir and reflux for 0.5h to obtain a concentrated sodium ethylate / ethanol solution; add 0.1mol urea and continue to reflux for 0.5h, then add 10.6ml of ethyl cyanoacetate dropwise and continue to reflux for 3h before cooling Slowly add hydrochloric acid solution dropwise to adjust the pH to 7, then add 0.1mol of stearic acid until it is completely melted and dissolved; after raising the temperature to 90-95°C, slowly add 0.1mol of zinc chloride dropwise, and then stir for 2.5h after the dropwise completion. After cooling to room temperature, the product was suction-filtered, soaked and washed with water mist, and dried at 80-90° C. to constant weight to prepare N-methyl-6-aminouracil zinc salt with a yield of 93%.
[0059] Convert the anion to CO 3 2- 0.95 kg of hydrotalcite, 0.05 kg of bisphenol A epoxy resin (E44) with an epoxy value of 0.4 to 0.6, pre-mixed evenly, and sheared and mixed for 20 minutes on a mixer at ...
Embodiment 3
[0063] Add 0.1mol sodium metal to 100ml absolute ethanol, stir and reflux for 0.5h to obtain a concentrated sodium ethylate / ethanol solution, then add 0.1mol thiourea and continue to reflux for 0.5h, then add 10.6ml of ethyl cyanoacetate dropwise and continue to reflux for 3h . After cooling, add 4mol / L hydrochloric acid solution dropwise to adjust the pH to 7, then add 0.1mol stearic acid until it completely melts and dissolves; after raising the temperature to 90-95°C, slowly add 0.1mol zinc sulfate heptahydrate dropwise. Stir for another 2.5h, after cooling to room temperature, filter the product with suction, soak and wash with water mist, and dry at 80-90°C to constant weight to prepare N-methyl-6-thiosemicarbazide zinc salt with a yield of 95% .
[0064] Convert the anion to CO 3 2- 0.95 kg of hydrotalcite, 0.05 kg of bisphenol A epoxy resin (E44) with an epoxy value of 0.4 to 0.6, after pre-mixing uniformly, shear and knead for 20 minutes on a mixer at 140 ° C to obt...
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