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Acid dye dyeable polyacrylonitrile resin production method

A technology of polyacrylonitrile resin and acid dye, which is applied in the fields of dyeing, textiles and paper making, and can solve problems such as dye spots, fiber white spots, and difficulties

Active Publication Date: 2006-02-22
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has another disadvantage, because it is very difficult to impregnate the acid evenly in the fiber, and the uneven acid content in the fiber will cause white spots and dye spots after the fiber is dyed.

Method used

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  • Acid dye dyeable polyacrylonitrile resin production method
  • Acid dye dyeable polyacrylonitrile resin production method
  • Acid dye dyeable polyacrylonitrile resin production method

Examples

Experimental program
Comparison scheme
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Embodiment 1～8

[0022] Suspension polymerization is carried out with water as the medium in a reactor equipped with a reflux condenser, an electric stirrer and an electric temperature controller.

[0023] Select vinyl acetate as the second monomer, control the feed weight ratio of acrylonitrile and vinyl acetate to be 92:8, select the required third monomer and determine its feed amount according to the required feed ratio, each embodiment specifically adopts The third monomer and its charging amount are listed in Table 1;

[0024] The total monomer feed concentration is 30%;

[0025] The initiator selected is a redox system composed of an oxidizing agent and a reducing agent, wherein the oxidizing agent is sodium chlorate, and the reducing agent is sodium pyrosulfite. The amount of oxidizing agent added is 0.5wt% based on the total amount of all polymerized monomers, and the amount of reducing agent added is determined by the molar ratio of reducing agent and oxidizing agent being 1.5:1.

...

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PUM

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Abstract

The invention provides a process for preparing acid dye dyeable polyacrylonitrile resin, which comprises using water as medium for suspension polymerization, wherein the polymers comprises acrylonitrile, flexibly modified second comonomer and dyeing modified third monomer, calculated by the total amount of all the polymers, the charge amount of the second comonomer is 5-15wt%, the charge amount of the third comonomer is 1.0-5.0wt%, the input concentration of the total polymer is 10-50%, the reaction temperature of is 50-140 deg. C, the reacting time is 1-20 hours, the third monomer is compound having a structural formula disclosed in the specification, wherein n is an integer of 2-6, R1 is H or C1-C4 alkyl, R2 and R3 are each C1-C4 alkyl.

Description

technical field [0001] The invention relates to a manufacturing method of acid dye-dyeable polyacrylonitrile resin. Background technique [0002] The important use of polyacrylonitrile resin is to be used as spinning raw material for the manufacture of polyacrylonitrile fiber (acrylic fiber). The dyeing performance of pure polyacrylonitrile resin is very poor. In addition to the permanent second comonomer, 5-15 wt% of the third comonomer used for dyeing modification must also be added. Most general polyacrylonitrile resins use sodium methacrylate as the third monomer, which has excellent dyeability for cationic dyes. Although cationic dyes have the advantages of rich colors, bright colors and high color fastness, because the performance of acrylic fiber is similar to that of wool, the blended and blended fabrics of acrylic fiber and wool occupy a large proportion in the post-processing products of acrylic fiber, and wool should use acidic dyes. Dyes are used for dyeing, an...

Claims

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Application Information

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IPC IPC(8): C08F220/44C08F2/18D06P3/74
Inventor 季春晓任国强杜欣庄王胜利瞿中凯徐晓辰李荣安王雁
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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