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Modified polytrimethylene terephthalate

A technology of poly(trimethylene terephthalate) and poly(trimethylene phthalate), which is applied in the field of fibers and fiber products, can solve the problems of low toughness, easy breakage, and difficulty in fully reflecting soft texture and the like

Inactive Publication Date: 2003-04-02
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the CD-PTT fiber in the past has the following problems: 1) It is obtained from a polymer with low molecular weight, so its toughness is low (the toughness is used to indicate the toughness of the fiber, usually 1 / 2 of the fiber strength and elongation) product to represent
), it is easy to break when weaving, and 2) although the molecular weight is low, due to excessive stretching, heat generated during dyeing or thermal coagulation, the molecules of the amorphous part are oriented and relaxed, causing large shrinkage, hardening, and difficulty fully reflect its soft texture, etc.

Method used

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  • Modified polytrimethylene terephthalate
  • Modified polytrimethylene terephthalate
  • Modified polytrimethylene terephthalate

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0253] [Preparation method of evaluation fabric]

[0254] 1) Take a strand of fabric as a sample.

[0255] 2) Put Skoalol (Skoalol) FC-250 at 2g / L in warm water at 70°C for 20 minutes

[0256] 3) Thermal coagulation was performed at 180° C. for 30 seconds using a tenter.

[0257] [test methods]

[0258] Device: Spectrophotometer: Macbeth CE-3000 (manufactured by Masbes Corporation)

[0259] Measuring conditions: ASTM D1925-70 (YI value), ASTM 313-73 (WI value) were measured according to the following methods.

[0260] Field of view: 2°

[0261] Light source: C (CIE 1964)

[0262] Specular Gloss: Included

[0263] UV light: included

[0264] Calculation: Calculate the YI value and WI value according to the formula.

[0265] YI=100×(1.28X-1.06Z) / Y

[0266] WI=4×0.847Z-3Y

[0267] At this time, X, Y, and Z are the stimulus values ​​in the XYZ colorimetric system of the sample.

[0268] (16) Expansion rate

[0269] The web Q of the innermost layer of the silk layer (10...

Embodiment 1

[0283] 1300g (6.7 moles) of dimethyl terephthalate, 1144g (15 moles) of 1,3-propanediol, 40.5g (0.14 moles) of dimethyl 5-sodium sulfoisophthalate, 2.4 g of calcium acetate monohydrate g (0.014 mol) and 1.0 g (0.01 mol) of lithium acetate dihydrate were placed in a 3-liter autoclave, and esterification reaction was carried out while distilling off methanol at 220°C. The transesterification reaction rate was 95%. After the transesterification reaction, add 0.65 g of trimethylsulfonate and 1.34 g of titanium tetrabutoxide, stir for 30 minutes, and distill off 1,3-propanediol at 270°C under a vacuum of 13.3 to 66.5 Pa. The polycondensation reaction was carried out for 1.5 hours. After the polycondensation reaction is completed, the obtained melt is put into water in the form of a rope, and the obtained rope is cut into fine pieces to obtain a tip-shaped prepolymer. In addition, at the end of the polycondensation reaction, it was found that the melt viscosity increased with time...

Embodiment 2

[0289]Except that the polycondensation reaction was carried out at 260°C for 1.5 hours, other prepolymers were obtained in the same manner as in Example 1. The intrinsic viscosity of the prepolymer was 0.52 dl / g, and the amount of terminal carboxyl groups was 16 meq / kg resin. The obtained prepolymer was subjected to solid-phase polymerization at 215° C. under a nitrogen stream. The solid-state polymerization of the polymer is fast, and the obtained CD-PTT has excellent melt stability and excellent hue (Table 1).

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Abstract

A polytrimethylene terephthalate modified by copolymerization with an ester-forming sulfonate salt; and fibers made therefrom. This polymer exhibits a high melting temperature, is reduced in viscosity drop in melting, and has a high molecular weight, and the fibers have high toughness and excellent whiteness and are dyeable with cationic dyes, thus being useful as clothes, carpets, nonwoven fabrics and so on.

Description

technical field [0001] The present invention relates to copolymerized poly(trimethylene terephthalate) (hereinafter abbreviated as PTT), its production method, and fibers and fiber products using it. Specifically, it relates to a high molecular weight copolymerized PTT as a raw material for cationic dye-dyeable PTT fibers, a method for producing the same, fibers and fiber products using the same. [0002] More specifically, it relates to a high-molecular copolymer PTT that can be produced at a high solid-state polymerization rate, has a low viscosity decrease rate during melting, and has cationic dye-dyeability as a raw material for PTT fibers, and has high toughness, A cationic dye-dyeable PTT fiber with excellent processability and no large shrinkage during dyeing and thermal coagulation, and the fiber product. Background technique [0003] The PTT fibers obtained by melt spinning the polycondensate of terephthalic acid or lower alcohol esters of terephthalic acid and 1,3...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08G63/80D01F6/84
CPCC08G63/6886C08G63/80D01F6/84Y10T428/2904Y10T428/2913Y10T428/2909C08G63/688
Inventor 加藤仁一郎高桥哲子冈嶋真一藤本克宏井村宪二
Owner ASAHI KASEI KK