Heat-resistant and flame-retardant polyester, polyester product, preparation method and application thereof
A flame-retardant polyester and heat-resistant technology, applied in the field of polyester, heat-resistant flame-retardant polyester, polyester products and their preparation, can solve the problems of insufficient heat resistance and flame retardancy, and achieve the goal of getting rid of high dependence and excellent durability Effects of thermal and flame retardancy
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[0037] Another aspect of the embodiments of the present invention also provides a method for preparing heat-resistant and flame-retardant polyester, which includes:
[0038] Copolymerizing the first mixed reaction system comprising phosphorus-containing compound, dibasic acid and / or dibasic acid ester, dibasic alcohol, esterification and / or transesterification catalyst to obtain an intermediate product;
[0039] Making the second mixed reaction system comprising the intermediate product, polycondensation catalyst and stabilizer continue to react under vacuum conditions to obtain heat-resistant and flame-retardant polyester;
[0040] Wherein, the phosphorus-containing compound has a structure as shown in formula (I):
[0041]
[0042] Formula (I)
[0043] In formula (I), X and Y are independently selected from -OH, -OCOCH 3 or -O(CH 2 ) 2 OH,R 1 , R 2 , R 3 , R 4are independently selected from hydrogen, substituted or unsubstituted C1-C6 alkyl, substituted or unsubst...
Embodiment 1
[0117] Example 1 Dimethyl 2,5-furandicarboxylate, phosphorus-containing compound (formula (8)), ethylene glycol, and anhydrous zinc acetate were added to the reactor at a molar ratio of 1:0.3:2.0:0.001, nitrogen Under protective conditions, raise the temperature to 185°C, react for 3.5 hours, then add antimony trioxide with a molar weight of 1.0‰ of dimethyl 2,5-furandicarboxylate, and Triphenyl phosphate, the vacuum degree is 30Pa, the temperature is gradually raised to 245 ° C, and the reaction is carried out for 5.0 hours to obtain polyethylene-2,5-furandicarboxylate phosphorus-containing diol copolyester. The copolyester structure is shown in the following formula: 1 H-NMR (d-DMSO): δ=7.13ppm, furan ring, 2H; δ=4.55ppm, -CH 2 CH 2 -, 3.6H; δ=3.63ppm, methyl, 0.59H; δ=4.10-4.60ppm, CH, 0.1H; δ=6.41-7.72ppm, benzene ring, 1.4H. The glass transition temperature of the copolyester is 107°C, and the DSC spectrum is as follows figure 1 Shown; T in nitrogen 5% The thermal wei...
Embodiment 2
[0120] Example 2 Dimethyl 2,5-furandicarboxylate, phosphorus-containing compound (formula (4)), ethylene glycol, and anhydrous zinc acetate were added to the reactor at a molar ratio of 1:0.05:2.1:0.0008, nitrogen Under protective conditions, raise the temperature to 190°C, react for 3 hours, then add antimony trioxide with a molar weight of 1.5‰ of dimethyl 2,5-furandicarboxylate, and phosphoric acid with a molar weight of 2.0‰ of dimethyl 2,5-furandicarboxylate Triphenyl ester, the vacuum degree is 60Pa, the temperature is gradually raised to 250°C, and the reaction is carried out for 4.0h to obtain the target product. through 1 H-NMR characterization revealed that the target product was polyethylene-2,5-furandicarboxylate phosphorus-containing diol copolyester, and its structural formula was shown in the following formula. The glass transition temperature of the copolyester is 91° C., and the flame retardancy test is V1 level.
[0121]
[0122] Wherein, m and n are int...
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