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Stable-color fatty-aromatic copolyester and preparation method thereof

A technology of color stability and color stabilizer, which is applied in the field of aliphatic-aromatic copolyester and its preparation, can solve the problems of phenol toxicity, negative environment, strong corrosion of equipment, etc., and achieve high longitudinal tear strength and degradable speed control, high heat resistance

Inactive Publication Date: 2015-04-01
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] If no color stabilizer is added in the process of synthesizing PBAT, the color of the synthesized product is pink to red. So far, in order to obtain white PBAT, phosphorus-containing stabilizers are usually added, and the phosphorus-containing compounds used are usually the same as those used. The substituents of phosphoric acid and phosphorous acid are usually phosphoric acid and phosphorous acid, but phosphoric acid and phosphorous acid are relatively corrosive to equipment, requiring production equipment to use corrosion-resistant materials
[0008] At the same time, phosphate esters and phosphites are also commonly used as color stabilizers for PBAT, commonly used are trimethyl phosphate, triphenyl phosphate, triethyl phosphate, triphenyl phosphite, etc. These stabilizers are used in There are usually by-products in the production of PBAT. For example, when triphenyl phosphate is used, the by-product phenol will be produced. Phenol has certain toxicity and has a negative impact on the environment.
The use of trimethyl phosphate will produce methanol, which will have a negative impact on the vacuum system of the production equipment

Method used

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  • Stable-color fatty-aromatic copolyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Pump the metered 1,4-butanediol into the reaction kettle, open the reaction kettle to freeze the brine to reduce the temperature of the material to 15°C, add a certain amount of phosphorus oxychloride to the reaction kettle while stirring, and control the temperature not to exceed 50°C; this reaction has been dripping phosphorus oxychloride for the whole reaction, and the hydrogen chloride gas generated by the reaction is discharged to the three-stage falling film absorption tower through the emptying pipe of the reaction kettle to absorb the by-product hydrochloric acid and butanediol of butanediol phosphate Solution, wherein the mass percent of butanediol phosphate is 8wt%;

[0032] Add 33.0g of 1,4-butanediol, 25.0g of adipic acid, 35g of terephthalic acid, 2.2g of naphthalene dicarboxylic acid, and 10g of butanediol solution of butanediol phosphate into the reaction kettle, under nitrogen protection , raised the temperature to 210°C, added 30mg of n-butyl titanate, ...

Embodiment 2

[0034] Pump the metered 1,4-butanediol into the reaction kettle, open the reaction kettle to freeze the brine to reduce the temperature of the material to 15°C, add a certain amount of phosphorus oxychloride to the reaction kettle while stirring, and control the temperature not to exceed 50°C; this reaction has been dripping phosphorus oxychloride for the whole reaction, and the hydrogen chloride gas generated by the reaction is discharged to the three-stage falling film absorption tower through the emptying pipe of the reaction kettle to absorb the by-product hydrochloric acid and butanediol of butanediol phosphate Solution, wherein the mass percent of butanediol phosphate is 8%;

[0035] Add 33.0g of 1,4-butanediol, 35.0g of terephthalic acid, 34.4g of sebacic acid, 2.5g of naphthalene dicarboxylic acid, and 9g of butanediol solution of butanediol phosphite into the reaction kettle, nitrogen Under protection, raise the temperature to 210°C, add 30 mg of n-butyl titanate, mai...

Embodiment 3

[0037] Pump the metered 1,4-butanediol into the reaction kettle, open the reaction kettle to freeze the brine to reduce the temperature of the material to 15°C, add a certain amount of phosphorus trichloride into the reaction kettle while stirring, and control the temperature not to exceed 90°C; Phosphorus trichloride has been added dropwise in this reaction to complete the reaction, and the hydrogen chloride gas generated by the reaction is discharged to the third-stage falling film absorption tower through the emptying pipe of the reaction kettle to absorb the by-product hydrochloric acid and butylene glycol phosphite Alcoholic solution, wherein the mass percent of butanediol phosphite is 4%;

[0038] Add 33.0g of 1,4-butanediol, 25.0g of sebacic acid, 35g of terephthalic acid, 2.2g of naphthalene dicarboxylic acid, and 12g of butanediol solution of butanediol phosphite into the reaction kettle under nitrogen protection Then, raise the temperature to 210°C, add 30mg of n-butyl...

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Abstract

The invention discloses a stable-color fatty-aromatic copolyester which is prepared from aromatic dibasic acid, aliphatic dibasic acid, aliphatic dibasic alcohol and a phosphorus color stabilizer, wherein the phosphorus color stabilizer accounts for 0.05-1.00 wt% of the stable-color fatty-aromatic copolyester. The preparation method comprises the following steps: a) preparing a phosphorous acid / phosphate butanediol solution; b) esterifying to obtain a corresponding esterification substance; c) prepolymerizing to obtain a corresponding prepolymer; and d) carrying out polycondensation reaction. In the copolymerization process of preparing the fatty-aromatic copolyester, the phosphorus color stabilizer is used as the comonomer to obtain the stable-color fatty-aromatic copolyester, and no phosphoric acid or phosphorous acid substituent byproduct can be generated in the synthesis process; and the film material formed by carrying out blow molding on the fatty-aromatic copolyester has higher longitudinal tearing strength.

Description

technical field [0001] The invention relates to an aliphatic-aromatic copolyester and a preparation method thereof, in particular to a color-stable 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 th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/692C08G63/78
Inventor 苑仁旭焦建熊凯钟宇科徐依斌吴水珠曾祥斌
Owner KINGFA SCI & TECH CO LTD