Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of flame-retardant polyester composition

A composition and flame retardant technology, applied in the field of preparation of flame retardant polyester compositions, can solve the problems of inability to be widely used, lack of technical versatility, etc., and achieve the effects of suppressing the drop of melting point and excellent flame retardant performance

Active Publication Date: 2016-10-05
TORAY IND INC
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the thermal reaction during the preparation of the flame retardant, a large amount of diethylene glycol
[0009] At the same time, Patent Document 3 and Patent Document 4 both use special phosphorus compounds, which lack technical versatility and cannot be widely used.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of flame-retardant polyester composition
  • Preparation method of flame-retardant polyester composition

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of the flame retardant polyester composition of the present invention is, when using dibasic carboxylic acid or derivatives thereof and dibasic alcohol as main raw materials to prepare polyester, the phosphorus compound represented by the following formula 1 and ethylene glycol are mixed by weight The slurry formed at a ratio of 10:90~50:50 is added within 80 minutes before the start of the polymerization reaction, with the content of phosphorus in the polyester composition being 0.3~1.1wt%.

[0026] Formula 1,

[0027] Wherein R1 is an alkyl group with 1 to 18 carbon atoms, an aryl group or a hydroxyl group.

[0028] The dicarboxylic acid components of the present invention include various dibasic acid components such as aromatic dicarboxylic acids, chain aliphatic acids, and ester cyclophatic dibasic acids. From the viewpoint of mechanical properties, heat resistance and hydrolysis resistance of the polyester composition, aromatic dicarboxyl...

Embodiment 1

[0082] (aggregation method)

[0083] Into the esterification kettle containing 1950 parts by weight of dihydroxyethyl terephthalate and the temperature maintained at 245°C, put the slurry containing 1100 parts by weight of terephthalic acid and 480 parts by weight of ethylene glycol into the tank for 3 hours It is supplied, and the esterification reaction is carried out while discharging the generated water to the outside of the system during the esterification reaction. 1300 parts by weight of the oligomers generated after the reaction were transferred to a polymerization reactor.

[0084] Then, 40 minutes before the start of the polymerization reaction, a pre-prepared slurry of 65 parts by weight of 2-hydroxyethyl (phenyl) phosphonic acid and 150 parts by weight of ethylene glycol was added to the oligomer, and then 500 ppm of For antimony trioxide, the temperature of the reaction system is slowly raised from 250°C to 290°C, and at the same time, the pressure of the reactio...

Embodiment 2

[0091]In the slurry of the phosphorus compound and ethylene glycol, except that the concentration of the phosphorus compound relative to the slurry was changed to 10 wt %, a flame-retardant polyester composition was obtained in the same manner as in Example 1. Compared with Example 1, the scattering rate of the phosphorus compound can be reduced. On the other hand, if the amount of ethylene glycol added increases, the amount of diethylene glycol produced as a by-product from ethylene glycol increases compared with Example 1, but there is no problem, and the fiber physical properties and flame retardancy All good.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
melting pointaaaaaaaaaa
strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a flame-retardant polyester composition which can inhibit generation of by-products and prevent depression of a melting point of a polymer and has the excellent flame-retardant property. According to the method, when polyester is prepared by taking dicarboxylic acid or a derivative thereof and dihydric alcohol as main raw materials, slurry prepared from a phosphorus compound shown as a following formula 1 (please see the formula in the description) and ethylene glycol according to the weight ratio of 10:90-50:50 is added in 80 minutes before a polymerization reaction starts according to the weight that the phosphorous element content in the polyester composition is 0.3 wt%-1.1 wt%, wherein in the formula 1, R1 is an alkyl group or an acryl group or a hydroxyl group with 1-18 carbon atoms.

Description

technical field [0001] The invention relates to a preparation method of a flame-retardant polyester composition. In detail, it relates to a method for preparing a flame-retardant polyester composition with good productivity and excellent flame-retardant performance, which can suppress the formation of by-products of the polymerization reaction and the melting point of the resulting polyester composition. Background technique [0002] Polyester has excellent properties and is widely used as fibers, films, and resins. At the same time, the awareness of disaster prevention has increased in recent years, and the requirements for flame retardancy have also increased. [0003] The techniques for imparting flame retardancy to polyester can be broadly classified into three types. In detail, after post-processing the molded article of the polyester composition, the method of making the flame retardant adhere to the surface of the molded article or penetrate into the inside, or the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/692C08G63/78
Inventor 成娟望月克彦柏立军川俣宽佳伊藤智章松见大介
Owner TORAY IND INC