Synthesis method for phosphorus copolymerization flame retardant polyester
A technology of copolymerization flame retardant and synthesis method, which is applied in the field of polyester synthesis, can solve the problems of large introduction amount and affect the transparency of unsaturated polyester, and achieve the effect of good flame retardant performance and good water resistance performance.
Inactive Publication Date: 2015-04-15
QINGDAO SHOUSHENG IND
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Problems solved by technology
[0004] Unsaturated polyester is a kind of thermosetting plastic with the largest output, but general-purpose unsaturated polyester is easy to burn, and the limiting oxygen index is only 19. When burning, it produces a lot of harmful smoke. In many cases, flame-retardant unsaturated polyester is required. Saturated polyester resins, such as melamine, red phosphorus, ammonium polyphosphate, expanded graphite, and layered silicate nanoclay, have been reported as flame-retardant or composite flame-retardant unsaturated polyesters, but there are large amounts of introduction and influence on unsaturated polyester resins. The transparency, mechanical properties, electrical properties and other defects of polyester
Method used
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Experimental program
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Embodiment
[0015] One, add 388g dimethyl terephthalate, 248g ethylene glycol, 9.4g 9,10-dihydro-9-oxo-10-oxaphosphine, catalyst zinc acetate and antimony trioxide in the reactor, at 200 Heating at ℃ for 120min to carry out transesterification reaction;
[0016] 2. Then, the temperature was raised to 275°C within 30 minutes, and the system was slowly decompressed. After 45 minutes, the pressure was 0.26kPa, and the reaction was continued for 80 minutes to obtain a flame-retardant polyester.
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Abstract
The invention discloses a synthesis method for phosphorus copolymerization flame retardant polyester. The method comprises the steps of: firstly subjecting dimethyl terephthalate, ethylene glycol, 9, 10-dihydro-9-oxo-10-phosphaphenanthrene, catalyst zinc acetate and antimony trioxide to ester exchange reaction at 150DEG C-230DEG C; and then raising the temperature to 275DEG C, reducing the pressure to 0.26kPa, and further carrying out reaction for 80min, thus obtaining the flame retardant polyester. The synthesis method for phosphorus copolymerization flame retardant polyester provided by the invention does not influence the catalyst effect during copolymerization, does not generate ether bond, and does not cause bridge stand effect, thus having no damage to the physical properties of original polyester. The obtained flame retardant polyester has good flame retardant performance and good water resistance.
Description
[0001] technical field [0002] The invention relates to a synthetic method of polyester, in particular to a synthetic method of phosphorus-containing flame-retardant polyester. [0003] Background technique [0004] Unsaturated polyester is a kind of thermosetting plastic with the largest output, but general-purpose unsaturated polyester is easy to burn, and the limiting oxygen index is only 19. When burning, it produces a lot of harmful smoke. In many cases, flame-retardant unsaturated polyester is required Saturated polyester resins, such as melamine, red phosphorus, ammonium polyphosphate, expanded graphite, and layered silicate nanoclay, have been reported as flame-retardant or composite flame-retardant unsaturated polyesters, but there are large amounts of introduction and influence on unsaturated polyester resins. The transparency, mechanical properties, electrical properties and other defects of polyester. [0005] Contents of the invention [0006] The object o...
Claims
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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/692C08G63/86C08G63/83
Inventor 李继升
Owner QINGDAO SHOUSHENG IND
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