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Cationic polyurethane, its preparation method, fabric pretreatment liquid and its application

A technology of cationic polyurethane and pretreatment liquid, which is applied in fiber treatment, textiles and papermaking, wear-resistant fibers, etc., and can solve problems such as the influence of fabric application performance

Active Publication Date: 2020-09-29
GUANGDONG YINYANG ENVIRONMENT FRIENDLY NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide cationic polyurethane, its preparation method, fabric pretreatment liquid and its application, aiming to solve the problem of fabric application performance being affected during the fabric finishing or treatment process in the prior art. The problem

Method used

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  • Cationic polyurethane, its preparation method, fabric pretreatment liquid and its application
  • Cationic polyurethane, its preparation method, fabric pretreatment liquid and its application
  • Cationic polyurethane, its preparation method, fabric pretreatment liquid and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1 (as solid wool / fiber curing agent):

[0053]Preparation of cationic polyurethane: 68 parts of PPG, 2 parts of 1,4-butanediol, 35 parts of IPDI and 0.01 part of organic bismuth were reacted at 80-85° C. for 3-4 hours under nitrogen protection. Then, lower the temperature to 50-60°C, add 9 parts of N-methyldiethanolamine and react for 30-60 minutes. Finally, lower the temperature to 40°C, add 5 parts of acetic acid to react for 30 minutes, and then add water to disperse for 30 minutes.

[0054] Preparation of fabric pretreatment liquid: add pH adjuster, handle finishing agent, and prepared cationic polyurethane emulsion into a certain amount of water, stir well and prepare fabric pretreatment liquid.

[0055] Wherein, the pH of the fabric pretreatment liquid is 3-7. The concentration of the pH regulator is 0-5g / L, the concentration of the hand finishing agent is 0-80g / L, and the concentration of the cationic polyurethane emulsion is 5-30g / L. The pH regulat...

Embodiment 2

[0060] Example 2 (used as a powerful lifter):

[0061] Preparation of cationic polyurethane: 80 parts of PPG, 1 part of 1,4-butanediol, 25 parts of IPDI and 0.01 part of organic bismuth were reacted at 80-85° C. for 3-4 hours under nitrogen protection. Then, lower the temperature to 50-60°C, add 9 parts of N-methyldiethanolamine and react for 30-60 minutes. Finally, lower the temperature to 40°C, add 5 parts of acetic acid to react for 30 minutes, and then add water to disperse for 30 minutes.

[0062] Fabric pretreatment solution configuration: add the pH regulator and the prepared cationic polyurethane emulsion into a certain amount of water, stir evenly, and prepare the fabric pretreatment solution.

[0063] Wherein, the pH of the fabric pretreatment liquid is 3-7. The concentration of the pH regulator is 0-5g / L, and the concentration of the cationic polyurethane emulsion is 5-50g / L. The pH regulator is acetic acid, citric acid or acetic acid-sodium acetate.

[0064] Fa...

Embodiment 3

[0067] Embodiment 3 (as elastic finishing agent):

[0068] Preparation of cationic polyurethane: Under nitrogen protection, react 70 parts of PTMG, 1.5 parts of 1,4-butanediol, 20 parts of IPDI, 10 parts of HDI and 0.01 part of organic bismuth at 80-85°C for 3-4h. Then, lower the temperature to 50-60°C, add 8 parts of N-methyldiethanolamine and react for 30-60 minutes. Finally, lower the temperature to 40°C, add 4 parts of acetic acid to react for 30 minutes, and then add water to disperse for 30 minutes.

[0069] Preparation of fabric pretreatment liquid: add pH adjuster, silicone elastomer emulsion, and prepared cationic polyurethane emulsion into a certain amount of water, stir evenly, and prepare fabric pretreatment liquid.

[0070] Wherein, the pH of the fabric pretreatment liquid is 3-7. The concentration of the pH regulator is 0-5g / L, the concentration of the cationic polyurethane emulsion is 5-30g / L, and the silicone elastomer emulsion is 0-20g / L. The pH regulator i...

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Abstract

The invention discloses a cationic polyurethane, its preparation method, fabric pretreatment liquid and application thereof. Wherein said method for preparing cationic polyurethane comprises: using isocyanate, small molecule glycol, polyether polyol and catalyst to generate isocyanate group-terminated prepolymer; adding N-methyldiethanolamine to carry out chain extension reaction; after adjusting the pH value , add water to disperse. The cationic polyurethane can be applied to various textile fabrics. Its good film-forming property can effectively improve the hair shedding / flying phenomenon of the fabric during use, wearing and washing (as a hair-fixing and fiber curing agent), and its cross-linking property can effectively improve the bursting strength and elongation of the fabric (as a strength enhancer). In addition, the glossiness of the fabric is improved (as a brightening agent) through process and dosage adjustment, and the anti-pilling property of the fabric is improved (as an anti-pilling agent) by adjusting the synthesis ratio and dosage.

Description

technical field [0001] The invention relates to the technical field of fabric treatment, in particular to cationic polyurethane, its preparation method, fabric pretreatment solution and application thereof. Background technique [0002] In the traditional textile pretreatment, dyeing, and finishing processes, in order to obtain better fabric appearance, luster, handle, and dyeing level dyeing, it is generally necessary to put the fiber or fabric in the working solution at high temperature, strong acid or strong alkali. conditions and continue to process for a long time. Due to various temperature conditions, the use of chemicals and equipment, the chemicals penetrate into the fiber or cross-link to the fiber or fabric, resulting in various forms of loss of the fiber or fabric, especially the loss of fiber strength and the internal structure of the fabric Brittle. [0003] This not only reduces the production efficiency and output, but also affects the subsequent washing an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/73C08G18/76C08G18/66C08G18/48C08G18/32C08G18/12D06M15/564
CPCC08G18/12C08G18/48C08G18/4854C08G18/6674C08G18/6688C08G18/722C08G18/724C08G18/73C08G18/755C08G18/7614D06M15/564D06M2200/35C08G18/3275
Inventor 黄旭明刘涛何荻赵志辉
Owner GUANGDONG YINYANG ENVIRONMENT FRIENDLY NEW MATERIALS CO LTD
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