Titanium white for dry acrylic spinning delustering its preparing method

A dry-process acrylic fiber and titanium dioxide technology, applied in the field of chemical fiber titanium dioxide, can solve the problems of undiscovered patent reports and rare patents, etc.

Inactive Publication Date: 2006-11-08
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0025] Although there are a large number of patents and research articles related to the surface treatment of titanium dioxide, there are few patents on the preparation method of titanium dioxide for chemical fiber matting, especially for titanium dioxide and its preparation method for dry acrylic fiber matting. There are patent reports

Method used

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  • Titanium white for dry acrylic spinning delustering its preparing method

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Comparison scheme
Effect test

Embodiment 1

[0077] Add 3500g of deionized water into a 5L glass beaker, anatase TiO 2 2500g, beating and dispersing for 30 minutes with mechanical stirring, then sand milling for 2 hours in a sand mill filled with zirconia grinding beads, and dilute the resulting slurry with 5L deionized water, carry out sedimentation classification in a gravity settler, remove the bottom containing For the coarse particle slurry, the upper layer (90%) slurry is taken for subsequent use.

[0078] In a 10L jacketed reactor equipped with a stirrer, reflux condenser, high-level feed tank and temperature display, add 5L of the above-mentioned upper layer slurry and heat to 65°C. At the same time, 335 g of 15% aluminum sulfate solution and 300 g of 10% sodium hydroxide solution were added dropwise to the reaction kettle at a constant speed, and the addition was completed in 7 hours, and the mixture was kept for 4 hours for aging. Cool to below 35°C, adjust the pH value of the slurry to 7.0 with 5% sulfuric a...

Embodiment 2

[0081] at 5m 3 Add 3500L of deionized water into the stainless steel cylindrical tank, anatase TiO 2 2500kg, beating and dispersing for 2 hours with mechanical stirring, and then sanding for 3 hours in a sand mill filled with zirconia grinding beads, the resulting slurry was used for 5m 3 Dilute with deionized water, classify in a spiral centrifugal classifier, remove the thick slurry containing coarse particles, and take the dispersed thin slurry for later use.

[0082] In the 10m equipped with stirrer, reflux condenser, high feed tank and temperature display 3 In the reaction kettle, add the above graded slurry 7m 3 , heated to 95°C. At the same time, 470 kg of 10% sodium aluminate solution and 270 kg of 10% sulfuric acid solution were added dropwise to the reaction kettle at a uniform speed, and the addition was completed in 5 hours, and then aged for 2 hours. Cool to below 35°C, adjust the pH value of the slurry to 6.0 with 5% sulfuric acid solution and 5% sodium hydr...

Embodiment 3

[0085] Front operation is the same as embodiment 1. The organic treatment agent was replaced with: 2g of pentaerythritol, 1g of isopropyl tris(dioctylpyrophosphoryloxy) titanate, 0.3g of diisobutyl phthalate, and 5g of sodium polymethacrylate. Stir at 10°C for 1 hour, dry in an oven, and pulverize with a jet mill. The obtained titanium dioxide has good whiteness and light fastness. After the 10% DMF dispersion is sand-milled for 50 minutes, it takes 80 seconds to vacuum filter 50 ml of it with 9 cm qualitative filter paper. The titanium dioxide prepared by the above method is applied to the matting of the dry-process acrylic fiber system, has good filtration performance and spinnability, low end breakage rate, and the obtained tow has high strength, high whiteness and good dyeability.

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Abstract

The present invention discloses a kind of titanium white powder for extinction in dry spinning acrylic fiber and its preparation process. The titanium white powder is prepared with anatase type titanium white as material and through pulping, sanding milling, grading, purifying and other steps to eliminate coarse grains and impurity ions, coating with compact Al2O3 to obtain high weather resistance, water washing and coating with organic material. It has excellent dispersivity in spinning solution for dry spinning acrylic fiber and is used for extinction. It can result in excellent filtering performance and spinnability, low end breakage, high tow strength, high whiteness and high dyeability.

Description

technical field [0001] The invention belongs to the technical field of chemical fiber titanium dioxide, and relates to a titanium dioxide for dry-process acrylic fiber spinning and matting and a preparation method thereof. Background technique [0002] Chemical fiber has high transparency and gloss. During the fiber production and processing process, a certain amount of titanium dioxide is often added to make use of the high light scattering and hiding power of titanium dioxide to make the fiber matte and obtain better dyeability and opacity. , Appearance and feel etc. [0003] Titanium dioxide, scientific name titanium dioxide (TiO 2 ), is a widely used white pigment with three crystal forms: rutile, anatase and brookite. Titanium dioxide for chemical fiber matting, referred to as chemical fiber titanium dioxide, generally uses anatase titanium dioxide with lower hardness. [0004] Chemical fiber titanium dioxide is an important class of fine chemical products, the produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/10C09C1/36C09C3/12D01D5/04
Inventor 管爱国刘友志王庭楠戚声伟何明康陈守治李光华
Owner EAST CHINA UNIV OF SCI & TECH
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