Flame-retardant polyester composition for preparing industrial polyester fibre

Abstract

The invention relates to a flame-retardant polyester compound used for manufacturing industrial polyester fiber which includes the components as follows: a) the polyester of a reaction type flame-retardant which comprises a structural formula as I is formed by the copolycondensation of terephthalic acid, glycol, pentaerythritol and the flame-retardant. In the formula I, R1 refers to the alkylidene groups of C1 to C4; R2 and R3 respectively refer to the hydroxyalkyl of C2 to C4 or the car boxyalkyl of C2 to C4. The content of the pentaerythritol in the polyester is 0.01 to 0.10wt percent; the content of the flame-retardant in the polyester is 2 to 10wt percent; the characteristic viscidity of the polyester is 0.60 to 0.75 dl / g; b) a nucleating agent which relates to the grain of Nano-Kaolin with an average grain diameter of 200 to 600nm. The nucleating agent is uniformly stored in the polyester compound and the content of the nucleating agent is 0.06 to 1.0wt percent. The departure on the thermal transformation performance existed between the flame-retardant polyester compound and the normal polyester is remarkably reduced; the manufacturing industrial polyester fiber can be produced by adopting the normal polyester fiber manufacture device and technique.

Description

technical field [0001] The invention relates to a flame-retardant polyester composition, in particular to a flame-retardant polyester composition containing a phosphorus-based organic reactive flame retardant for manufacturing industrial polyester fibers. Background technique [0002] Polyester with flame-retardant properties has developed rapidly in recent years. The application fields of products involve civil and industrial applications. Among them, flame-retardant polyester fibers are the most widely used, especially industrial polyester fibers whose consumption is growing continuously. The flame retardancy has gradually become its basic performance requirement. The flame retardants used in flame retardant polyester mainly include three types: additive type, copolymerization reaction type and finishing type. Therefore, the flame retardant performance is more stable and long-lasting. Phosphorus-based reactive flame retardants have excellent flame retardant properties an...

AI Technical Summary

Problems solved by technology

This is actually similar to adding inorganic fillers to phosphorus-containing copolyesters to improve their thermal properties. The incorporation of higher content of inorganic particles in the polymer melt has little effect on the manufacture of films or other molded products, but has a significant impact on spinning Silk processing is obviously unfavorable, for example, it is easy to cause broken ends during spinning, and the service life of spinning components is shortened; the yield stress is reduced during drawing, which affects the orientation degree of macromolecules, etc., which will directly affect the mechanical properties of fiber products.

[0005] None of the existing technical solutions clearly proposes to try to reduce the deviation between the phosphorus-containing copolyester and conventional polyester in thermal transition performance, and for polyester fiber manufacturers, it is necessary to reduce the difference between phosphorus-containing copolyester and conventional polyester. The deviation of ester in thermal transition performance should be the most expected, because it will greatly reduce the difficulty of fiber manufacturing and processing, and effectively reduce production costs

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