Prepn process of fiber-forming biodegradable fatty copolyester
A technology of aliphatic copolyester and manufacturing method, which is applied in the field of preparation of biodegradable aliphatic copolyester for fiber-forming, can solve the problem of affecting production efficiency, excessive aliphatic diol, and complicated operation of multiple feeding operations, etc. problems, to achieve the effect of color improvement, increase in molecular weight of polymer products, and simplification of operation process
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Embodiment 1
[0025] Add 28.47g of dimethyl succinate, 88.27g of dimethyl terephthalate, 64.35g of 1,4-butanediol and 36.92mg of tetraisopropoxytitanium into a 500ml volume four-neck circle replaced by high-purity nitrogen. in the bottom flask. The four-necked flask is equipped with a high-purity nitrogen gas inlet, a mechanical stirrer, and a condensation water separator. The above reaction system was moved into an oil bath at 180°C, stirred and reacted for 1 to 2 hours with nitrogen gas, and then decompressed slowly, and the temperature of the oil bath was gradually increased to 230°C. The vacuum degree is controlled within 200Pa, and the vacuum polycondensation is carried out for 4 hours. After cooling, the product of the above polymerization reaction was first dissolved in chloroform, and then filtered, and excess cold methanol was added to the obtained filtrate. After separation and drying, aliphatic copolymers are obtained. The resulting product look is slightly yellow, and the wei...
Embodiment 2
[0027] Add 28.47g dimethyl succinate, 88.27g dimethyl terephthalate, 64.35g 1,4-butanediol, 36.92mg titanium tetraisopropoxide and 4.8mg calcium chloride to high-purity nitrogen Replaced in a 500ml volume four-neck round bottom flask. The four-necked flask is equipped with a high-purity nitrogen gas inlet, a mechanical stirrer, and a condensation water separator. The above reaction system was moved into an oil bath at 180°C, stirred and reacted for 1 to 2 hours with nitrogen gas, and then decompressed slowly, and the temperature of the oil bath was gradually increased to 240°C. The vacuum degree is controlled within 200Pa, and the vacuum polycondensation is carried out for 4 hours. After cooling, the product of the above polymerization reaction was first dissolved in chloroform, and then filtered, and excess cold methanol was added to the obtained filtrate. After separation and drying, aliphatic copolymers are obtained. Gained product look is white, and gel permeation chrom...
Embodiment 3
[0031] Add 28.47g dimethyl succinate, 88.27g dimethyl terephthalate, 64.35g 1,4-butanediol, 36.92mg titanium tetraisopropoxide and 7.2mg calcium chloride to high-purity nitrogen Replaced in a 500ml volume four-neck round bottom flask. The four-necked flask is equipped with a high-purity nitrogen gas inlet, a mechanical stirrer, and a condensation water separator. The above reaction system was moved into an oil bath at 180°C, stirred and reacted for 1 to 2 hours with nitrogen gas, and then decompressed slowly, and the temperature of the oil bath was gradually increased to 240°C. The vacuum degree is controlled within 200Pa, and the vacuum polycondensation is carried out for 4 hours. After cooling, the product of the above polymerization reaction was first dissolved in chloroform, and then filtered, and excess cold methanol was added to the obtained filtrate. After separation and drying, aliphatic copolymers are obtained. The resulting product is white in color, and the weigh...
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