A kind of highly hydrophilic flame-retardant polyester and preparation method thereof
A technology of flame-retardant polyester and high hydrophilicity, applied in the field of polyester and its preparation, to achieve the effect of improving hydrophilicity, lowering melting point, and increasing flexibility
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Embodiment 1
[0047]
[0048] The copolymer flame retardant CEPPA and ethylene glycol were mixed at a molar ratio of 1:1.2, and reacted at 100° C. for 1 hour to obtain the reaction product CEPPA-EG. Mix tetraethoxysilane (TEOS) and ethylene glycol at a molar ratio of 1:4, and react under the action of catalyst HCl to obtain a tetrakis (2-hydroxyethyl) orthosilicic acid solution. The terephthalic acid and ethylene glycol slurry were mixed at a molar ratio of 1:1.05 to prepare a slurry. The prepared slurry is mixed with the catalyst tetrabutyl titanate and then added to the esterification reactor for the first esterification reaction. The first esterification reaction temperature is 225° C., the reaction time is 4 hours, and the relative pressure of the reaction is 0 MPa. When the esterification reaction reached 82%, sorbitol and polyethylene glycol (PEG-200) were added for the second esterification reaction. The second esterification reaction temperature was 240°C, and the esterification reac...
Embodiment 2
[0050]
[0051] The copolymer flame retardant CEPPA and ethylene glycol were mixed at a molar ratio of 1:1.8, and reacted at 100° C. for 1 hour to obtain the reaction product CEPPA-EG. Mix hydroxy-terminated silicone oil with ethylene glycol at a molar ratio of 1:4.4. The catalyst SiCl 4 Under the action, the hydroxyl-terminated silicone oil-EG solution is obtained by reaction. The terephthalic acid and ethylene glycol slurry were mixed at a molar ratio of 1:2.0 to prepare the slurry. The prepared slurry is mixed with ethylene glycol antimony, antioxidant 1010 and trimethyl phosphate and then added to the esterification reactor for the first esterification reaction. The first esterification reaction temperature is 250°C, and the reaction time is 0.5h , The relative pressure of the reaction is 0.4MPa. When the esterification reaction reaches 95%, 1,2-propylene glycol and polyethylene glycol (PEG-400) are added for the second esterification reaction. The second esterification re...
Embodiment 3
[0053]
[0054] The copolymer flame retardant CEPPA and 1,2 propylene glycol were mixed at a molar ratio of 1:2.0, and reacted at 100° C. for 1 hour to obtain the reaction product CEPPA-1,2 propylene glycol. Mix tetraethoxysilane (TEOS) with ethylene glycol at a molar ratio of 1:4.6, and then mix it on the catalyst Al(OC 2 H 5 ) 3 Under the action of the reaction, tetrakis (2-hydroxyethyl) orthosilicic acid solution is obtained. The terephthalic acid and ethylene glycol slurry were mixed in a ratio of 1:1.6 to prepare the slurry. The prepared slurry is mixed with antimony trioxide and titanium dioxide mixture, antioxidant 168 and alkyl phosphoric acid diester, and then added to the esterification reactor for the first esterification reaction. The first esterification reaction temperature is 240°C. The time is 3h, and the relative pressure of the reaction is 0.3MPa. When the esterification reaction reaches 92%, 1,3-butanediol and polyethylene glycol (PEG-600) are added for the ...
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