Flame-retardant aliphatic-aromatic copolyester and preparation method thereof

An aromatic and copolyester technology, which is applied in the field of flame-retardant aliphatic-aromatic copolyester and its preparation, can solve the problems of not fully meeting the preparation requirements, poor storage and hydrolysis resistance, and adverse effects in the production process, etc. , to achieve the effect of prolonging the maintenance/replacement cycle, excellent appearance and aesthetics, and improving heat resistance

Inactive Publication Date: 2013-02-27
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantage is that the storage and hydrolysis resistance of the material are not good, and it uses tetrabutyl titanate as a catalyst, which is easy to block or even damage the equipment.
[0007] So far, aliphatic-aromatic copolyesters are the copolymerization of three monomers, and there is no document disclosing the introduction of phosphorus-containing repeating units in the molecular chain. This type of material cannot fully meet the preparation requirements, especially for flame-retardant requirements. application requirements
[0008] In addition, in the production process of aliphatic-aromatic copolyesters, the catalysts used are titanium-containing organic compounds such as n-butyl titanate and tetraisopropyl titanate. Such catalysts have high activity, but are very easy to hydrolyze , the titanium dioxide formed by hydrolysis in the production process is very easy to block or even damage the equipment, which will adversely affect the production process

Method used

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  • Flame-retardant aliphatic-aromatic copolyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Butanediol is heated to 160 DEG C, then add 0.05wt% flame retardant A accounting for copolyester weight under stirring, wherein, the molar ratio of butanediol and flame retardant A is 2:1, control process tower The temperature is 100°C, so that the water generated by the reaction slips out, and the reaction is carried out for 4 hours, and the esterification rate reaches 98%; g was added to the reaction kettle, under the protection of nitrogen, the temperature was raised to 210°C, and 30 mg of n-butyl titanate was added to maintain the temperature in the reaction kettle at 210°C. To judge the degree of reaction, when the esterification rate reaches 95%, add the solution of butanediol and flame retardant A to it, stir for 20 minutes, after the temperature reaches 230°C, react for 30 minutes, and then start to slowly heat up to 245°C, Gradually increase the degree of vacuum, keep the temperature constant, keep the pressure in the kettle below 80Pa, and react for 3.5 hours ...

Embodiment 2

[0037] Butanediol is heated to 160 DEG C, then add 0.10wt% flame retardant C accounting for copolyester weight under stirring, wherein, the molar ratio of butanediol and flame retardant B is 2:1, control process tower The temperature is 100°C, let the water generated by the reaction slip out, react for 4 hours, and the esterification rate reaches 98%; 33.0g of 1,4-butanediol, 35.0g of terephthalic acid, 34.4g of sebacic acid, naphthalene dicarboxylic acid Add 2.5g into the reaction kettle, under the protection of nitrogen, heat up to 210°C, add 30mg of n-butyl titanate, maintain the temperature in the reaction kettle at 210°C, remove the water produced by the reaction at the same time, and weigh the reaction produced water Use water to judge the degree of reaction. When the esterification rate reaches 95%, add the solution of butanediol and flame retardant C to it, stir for 20 minutes, raise the temperature to 230°C, react for 30 minutes, and then start to slowly heat up to 245...

Embodiment 3

[0039] Butanediol is heated to 160 DEG C, then add 0.70wt% flame retardant A accounting for copolyester weight under stirring, wherein, the molar ratio of butanediol and flame retardant A is 2:1, control process tower The temperature is 100°C, the water generated by the reaction is slipped out, the reaction is 4 hours, and the esterification rate reaches 98%. 33.0g of 1,4-butanediol, 25.0g of sebacic acid, 35g of terephthalic acid, and 2.2 g of naphthalene dicarboxylic acid g was added to the reaction kettle, under the protection of nitrogen, the temperature was raised to 210°C, and 30 mg of n-butyl titanate was added to maintain the temperature in the reaction kettle at 210°C. To judge the degree of reaction, when the esterification rate reaches 95%, add the solution of butanediol and flame retardant A to it, stir for 20 minutes, after the temperature reaches 230°C, react for 30 minutes, and then start to slowly heat up to 245°C, Gradually increase the degree of vacuum, keep th...

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PUM

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Abstract

The invention discloses flame-retardant aliphatic-aromatic copolyester, which is prepared with aromatic dibasic acid, aliphatic dibasic acid, aliphatic dihydric alcohol and phosphorus-based flame retardant. The amount of the phosphorus-based flame retardant is 0.05-1.00 percent of the flame-retardant aliphatic-aromatic copolyester by weight. A preparation method comprises the steps of: a) preparing butanediol solution of phosphate; b) performing esterification to obtain a corresponding esterified compound; c) performing prepolymerization to obtain a corresponding prepolymer; and d) performing polycondensation reaction. The flame-retardant aliphatic-aromatic copolyester has the beneficial effects that a titanium chelate compound with hydrolysis resistance is adopted as a catalyst, the amount of the added catalyst is reduced, the titanium dioxide precipitate cannot be produced during production, and the maintenance / replacement cycle of production equipment can be extended; and the material has degrading properties and flame retardant properties, the scope of application of the biodegradable material can be broadened further, the effect of stabilizing the color of the copolyester can be achieved while the flame retardant properties of the material is realized, the structure of the copolyester can be controlled easily, no gel can be produced easily during reaction, and the produced membrane is free from crystallization points formed by gel.

Description

technical field [0001] The invention relates to an aliphatic-aromatic copolyester and a preparation method thereof, in particular to a flame-retardant aliphatic-aromatic copolyester and a preparation method thereof. Background technique [0002] The application of synthetic polymers has been very extensive. Because the traditional general-purpose polymer materials are not degradable, they bring great convenience to people's lives, but also bring great pressure to the environment. Even with degradable natural materials such as starch Doping and degradation are only the filling part, and the non-degradable polymer part is difficult to recycle, causing inevitable environmental pollution, especially in agriculture, packaging and medical industries with short product life cycles. Finding new biodegradable alternative materials is one of the most interesting subjects at present. Aliphatic polyesters have good biodegradability, and can be converted into carbon dioxide and water in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/692C08G63/85C08L67/02
Inventor 苑仁旭焦健赵巍徐依斌蔡彤旻夏世勇曾祥斌
Owner KINGFA SCI & TECH CO LTD
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