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Flame-retardant polyester and preparation method thereof

A technology of flame retardant polyester and esterification, applied in the field of flame retardant polyester, which can solve the problems of high phosphorus loss and poor thermal stability.

Inactive Publication Date: 2019-04-19
FAR EASTERN NEW CENTURY COPRRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the flame-retardant polyesters prepared in the above-mentioned patents still have the problems of poor thermal stability and high phosphorus loss.

Method used

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  • Flame-retardant polyester and preparation method thereof
  • Flame-retardant polyester and preparation method thereof
  • Flame-retardant polyester and preparation method thereof

Examples

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Embodiment 1

[0039] In a 1 liter reactor, 280.6g (1.1mole) of bis-ethylene terephthalate powder (manufacturer is sigma-aldrich), 84g (0.5mole) of terephthalic acid, and 36.2g (0.17mole) of 2-carboxyethylphenylphosphinic acid (the 2-carboxyethylphenylphosphinic acid contains 14.47wt% phosphorus element), to obtain a composition. Nitrogen is fed into the reactor until the pressure of the reactor is 0.5 to 1 kg / cm 2 to replace the air in the reactor. Afterwards, in a nitrogen environment, under the conditions of normal pressure and 250°C reaction temperature, the composition was subjected to esterification reaction until the esterification rate of the esterification reaction was 84%, and an esterification product was obtained. Then, 0.105g of antimony trioxide and 0.525g of phosphoric acid in ethylene glycol solution (the concentration of phosphoric acid is 5wt%) were dropped into the reactor, and under the condition that the reaction temperature was 275°C, the ester The polycondensation pr...

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Abstract

A preparation method for a flame-retardant polyester includes the steps that: a combination of a bis-hydroxy alkyl terephthalate monomer and an organic diacid monomer mixture which includes an aromatic dicarboxylic acid monomer and a carboxy-phosphinic acid monomer is subjected to an esterification reaction to form an esterification reaction product; and the esterification reaction product is subjected to a polycondensation reaction. Wherein the aromatic dicarboxylic acid monomer has a structure in the formula (1), and the organic diacid monomer mixture comprises a dicarboxylic acid monomer and a carboxylic phosphonic acid monomer. The preparation method for a flame-retardant polyester can uniformly bond the carboxylic phosphonic acid monomer as a fire retardant in the polyester chain section so as to allow the made inflaming retarding polyester to have high heat stability and further have good storage and less phosphorus loss. The formula I is as shown in the description, wherein R1 separately shows hydrogen, phenyl, C1-C6 linear chain alkyl group or C3-C6 branched chain alkyl group, and two R1s are the same or different.

Description

technical field [0001] The present invention relates to a kind of flame retardant polyester and its preparation method, especially relates to a kind of using bis-hydroxyalkyl terephthalate monomer, aromatic dibasic carboxylic acid monomer and carboxyl phosphinic acid monomer to carry out esterification A flame retardant polyester preparation method in which the esterification reaction is obtained to obtain an esterification product, and then the esterification product is subjected to a polycondensation reaction, and the flame retardant polyester obtained by the preparation method. Background technique [0002] In order to improve the flame retardancy of polyester, a common way is to introduce a reactive flame retardant during the preparation of polyester. For example, Chinese patent CN102020766A adds a reactive flame retardant (for example: 2-carboxyethylphenylphosphinic acid, or hydroxymethylphenylphosphinic acid) to the mixed slurry of terephthalic acid and ethylene glycol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/78C08G63/692
CPCC08G63/6926C08G63/78C08G63/85C08G63/183C08G63/82C08L67/03C08L2201/02C08G63/80
Inventor 黄德仁王正廷李彦贤
Owner FAR EASTERN NEW CENTURY COPRRATION
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