Flame-retardant polylactic acid fiber containing metal modified cross-shaped ester and preparation method of fiber

A polylactic acid fiber and metal modification technology, which is applied in the manufacture of fire-resistant and flame-retardant filaments, single-component polyester artificial filaments, etc., can solve the problems of increased use costs, difficulties in polymer processing and molding, and functional cross-shaped ester compounds. The problem of low melting point

Active Publication Date: 2019-04-16
SHANGHAI DEFULUN CHEM FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the melting point of functional cruciform esters is not high, generally at 60-70°C, which puts forward certain requirements for its storage and transportation, and increases the cost of use
At the same time, since the addition of low-molecular ester type additives will greatly improve the rheological properties of the polymer, too high a cross-type ester content in the polymer will bring difficulties to the processing and molding of the polymer. The amount of added is usually no more than 6-8wt%, and such a low amount of functional masterbatch is difficult to meet the corresponding functional requirements

Method used

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  • Flame-retardant polylactic acid fiber containing metal modified cross-shaped ester and preparation method of fiber
  • Flame-retardant polylactic acid fiber containing metal modified cross-shaped ester and preparation method of fiber
  • Flame-retardant polylactic acid fiber containing metal modified cross-shaped ester and preparation method of fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A method for preparing a flame-retardant polylactic acid fiber containing a metal-modified cross-type ester compound, the specific steps are as follows:

[0063] (1) prepare cross-type esterified product;

[0064] (a) Dibasic acid A 2 Mix with pentaerythritol at a molar ratio of 4:1, carry out melt esterification reaction under nitrogen protection and mechanical stirring at a stirring speed of 300rpm, collect the product, obtain DAPER through dissolution, filtration and drying, wherein the temperature of the melt esterification reaction is 200°C, the reaction time is 3h, A 2 The structural formula is:

[0065]

[0066] (b) Dibasic carboxylic acid B 2 Mix with ethylene glycol at a molar ratio of 1:1, add 4-methylbenzenesulfonic acid, and carry out melt condensation reaction under nitrogen protection and mechanical stirring at a stirring speed of 500rpm to obtain DADA, wherein B 2 The molar ratio with 4-methylbenzenesulfonic acid is 1:0.01, the temperature of melt ...

Embodiment 2

[0085] A method for preparing a flame-retardant polylactic acid fiber containing a metal-modified cross-type ester compound, the specific steps are as follows:

[0086] (1) prepare cross-type esterified product;

[0087] (a) Dibasic acid A 2 Mix with pentaerythritol at a molar ratio of 4:1, carry out melt esterification under argon protection and mechanical stirring at a stirring speed of 350rpm, collect the product, dissolve, filter and dry to obtain DAPER, wherein the melt esterification The temperature is 185°C, the reaction time is 1h, A 2 The structural formula is:

[0088]

[0089] (b) Dibasic carboxylic acid B 2 Mix with propylene glycol at a molar ratio of 1:1, add 4-methylbenzenesulfonic acid, and carry out melt condensation reaction under nitrogen protection and mechanical stirring at a stirring speed of 300rpm to obtain DADA, wherein B 2 The molar ratio with 4-methylbenzenesulfonic acid is 1:0.01, the temperature of the melt condensation reaction is 185°C, an...

Embodiment 3

[0108] A method for preparing a flame-retardant polylactic acid fiber containing a metal-modified cross-type ester compound, the specific steps are as follows:

[0109] (1) prepare cross-type esterified product;

[0110] (a) Dibasic acid A 2Mix with pentaerythritol at a molar ratio of 4:1, carry out melt esterification under the condition of helium protection and mechanical stirring at a stirring speed of 400rpm, collect the product, obtain DAPER through dissolution, filtration and drying, wherein the melt esterification The temperature is 180°C, the reaction time is 2h, A 2 The structural formula is:

[0111]

[0112] (b) Dibasic carboxylic acid B 2 Mix with 1,4-butanediol at a molar ratio of 1:1, add 4-methylbenzenesulfonic acid, and carry out melt condensation reaction under argon protection and mechanical stirring at a stirring speed of 500rpm to obtain DADA, wherein B 2 The molar ratio with 4-methylbenzenesulfonic acid is 1:0.01, the temperature of melt condensati...

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Abstract

The invention relates to a flame-retardant polylactic acid fiber containing metal modified cross-shaped ester and a preparation method of the fiber. A poly-L-lacticacid section, a poly-D-lacticacid section and a functional polylactic acid master batch containing a modifier A and a modifier B are mixed evenly, and then the flame-retardant polylactic acid fiber containing the metal modified cross-shaped ester is prepared through a melt spinning method, wherein the mass ratio of the poly-L-lacticacid section to the poly-D-lacticacid section is 1:1; the modifier A is a mixture obtained by mixing aluminum benzoate, hydrated magnesium silicate and silicon dioxide in the mass ratio of 2:1:1; the modifier B is insoluble infusible metal modified cross-shaped ester which is insoluble in most organicsolvents at the temperature of 80 DEG C or below and is infusible in the range from room temperature to T, and T is larger than or equal to 380 DEG C. The method is simple and easy to implement and low in cost, and the finally prepared polylactic acid fiber is high in melting point, excellent in flame retardancy and very good in popularization value.

Description

technical field [0001] The invention belongs to the technical field of fiber modification, and relates to a flame-retardant polylactic acid fiber containing a metal-modified cross-shaped ester compound and a preparation method thereof. Background technique [0002] At present, common synthetic fibers such as polyester and nylon have stable physical and chemical properties, but there is a problem that waste cannot be decomposed after use. In order to achieve sustainable development, new alternative raw materials are needed in the textile field, especially environmentally friendly polymers. Polylactic acid (PLA) is a linear aliphatic thermoplastic polyester with good biocompatibility and degradability. Under certain conditions, it can be decomposed into water and carbon dioxide. [0003] Compared with petroleum-based PET fibers, PLA fibers have the advantages of good moisture permeability, high elastic recovery, low combustion heat, less combustion smoke, good UV resistance a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/07
CPCD01F1/07D01F6/92
Inventor 李东华陆育明冯忠耀陈辉华孙宾朱美芳李忠顾惠琴
Owner SHANGHAI DEFULUN CHEM FIBER
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