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A formaldehyde-free water-based crosslinking agent and its preparation method and fabric finishing process

A cross-linking agent, water-based technology, applied in the field of non-iron, anti-wrinkle, formaldehyde-free cross-linking and anti-shrinkage of cellulose fabrics, it can solve the problems of decreased strength, poor non-iron effect, yellowing of fabrics, etc. Improved ironing performance and less powerful damage

Inactive Publication Date: 2019-02-05
高介平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Textiles (clothing, home textiles, etc.) made of cellulose (cotton, linen, viscose, modal, tencel) materials have excellent comfort properties such as skin-friendly, moisture absorption and breathability, and are favored by consumers, but they will shrink after washing , wrinkling, deformation and other dimensional instability, how to make the size of this kind of textiles stable for a long time, and constantly meet the increasing requirements of consumers is a major issue of concern to the textile industry
[0003] At present, glyoxal and its various derivatives in the textile industry are mainly faced with the following problems when used as a formaldehyde-free non-ironing finishing crosslinking agent to treat cellulose fabrics: serious yellowing of the fabric, unsatisfactory finishing effect, and serious decline in strength
[0005] The unsatisfactory finishing effect and the serious decline in strength are always a pair of contradictions that are difficult to balance: because the catalysts used in the crosslinking reaction are relatively high concentrations of hydrochloric acid (HCl), MgCl 2 ·6H 2 O(magnesium chloride hexahydrate), (NH 4 ) 2 HPO 4 (Diammonium hydrogen phosphate), NH 4 NO 3 (ammonium nitrate) and other Lewis acids (Lewis acid), the pH value of the finishing agent solution is generally all less than 4, under this strongly acidic condition, the cellulose macromolecular chain is easy to absorb acid and degrades and breaks, causing the cellulose fabric to drop seriously; and In order to control the strength not to decrease excessively, reducing the amount of addition will lead to insufficient cross-linking reaction, poor non-ironing effect, more hemiacetal hydroxyl residues, and unsatisfactory finishing effect

Method used

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  • A formaldehyde-free water-based crosslinking agent and its preparation method and fabric finishing process
  • A formaldehyde-free water-based crosslinking agent and its preparation method and fabric finishing process
  • A formaldehyde-free water-based crosslinking agent and its preparation method and fabric finishing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of crosslinker I:

[0045] After 180g glucose is dissolved in the technical grade glyoxal solution of 250g solute mass fraction 40%, add the concentrated hydrochloric acid catalyst of 0.8ml solute mass fraction 36.5% earlier, hemiacetalization reaction takes place under reflux for 1.5 hours, then control temperature at Distill and dehydrate at 102°C to 108°C until there is no distillate; then add 62g of ethylene glycol, slowly heat up to 110°C and keep warm until there is no distillate to acetalize the aldehyde group of ethylene glycol and glucose, and finally add sodium hydroxide Neutralize hydrochloric acid, cool and crystallize, and filter to obtain a mixture of various acetals and hemiacetals, that is, crosslinking agent I.

Embodiment 2

[0047] Preparation of crosslinker II:

[0048] (1) Completely dissolve sodium 2,4-diaminobenzenesulfonate and sodium hydroxide in water, add tripolychlorazine and react at 35°C until the system is transparent,

[0049] The molar ratio of sodium 2,4-diaminobenzenesulfonate, sodium hydroxide and tripolychlorazine is 1:2:2;

[0050] (2) Add sodium hydroxide and 3-pyridinecarboxylic acid to the system obtained in step (1) and react at 47°C-50°C until the system is transparent again, and use a neutral buffer solution to adjust the pH of the system to 7, Obtain the aqueous solution of cross-linking agent II and store it below 50°C,

[0051] Wherein, the molar ratio of the added sodium hydroxide, 3-pyridinecarboxylic acid and the pure intermediate product in the system obtained in step (1) is 4:2:1.

[0052] Pretreatment of fiber fabrics:

[0053] The cotton fabric that has undergone desizing, scouring, bleaching, and mercerizing pretreatment is treated with liquid ammonia to obtain...

Embodiment 3

[0055] The cotton poplin cloth of above-mentioned pretreatment is soaked in the aqueous solution of cross-linking agent I prepared in embodiment 1 (wherein, cross-linking agent I 80g / L, catalyst ethylene glycol citrate triester 15g / L, pH value is 6), with a scraping rate of 78%, and then drying at 85°C for 60 seconds to make the moisture content of the fabric at this time 7%, then wrapping it with a plastic film at 30°C and stacking it for 3 hours, and finally washing it fully and putting it in Dry at 160°C,

[0056] During the experiment, the solution, the cloth surface during dipping, the cloth surface during the drying process at 85°C, the cloth surface during stacking, and the final cloth surface after drying at 160°C were tested many times. In the range of 6-7, samples were cooled and tested for moisture regain at room temperature (results are shown in Table 1).

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Abstract

The invention belongs to the technical field of formaldehyde-free cross-linking non-shrink, anti-wrinkling and easy-care cellulose fabric, and particularly relates to a formaldehyde-free waterborne cross-linking agent and a preparing method thereof and a finishing process for a fabric. Through two new kinds of waterborne cross-linking agents and the selection of water soluble multiple carboxylic ester as a cross-linking catalyst, the cellulose fabric is processed through two steps, thus a cellulose fabric formaldehyde-free easy-care finishing technology reaches a new level, that is, when the mightiness of the fabric is not impaired, high grade formaldehyde-free cross-linking non-shrink, anti-wrinkling and easy-care finishing properties are obtained at the same time, especially after the cellulose fabric is processed, a wet recovery rate of the cellulose fabric is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of formaldehyde-free cross-linking anti-shrinkage, anti-wrinkle and non-ironing technology of cellulose fabrics, and in particular relates to a formaldehyde-free water-based cross-linking agent, a preparation method thereof and a fabric finishing process. Background technique [0002] Textiles (clothing, home textiles, etc.) made of cellulose (cotton, linen, viscose, modal, tencel) materials have excellent comfort properties such as skin-friendly, moisture absorption and breathability, and are favored by consumers, but they will shrink after washing , wrinkling, deformation and other dimensional instability phenomena, how to make the size of such textiles stable for a long time, and constantly meet the increasing requirements of consumers, is a major issue of concern to the textile industry. [0003] At present, glyoxal and its various derivatives in the textile industry are mainly faced with the following p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H9/04C07H1/00C07D401/14D06M13/11D06M13/224D06M15/227D06M15/564D06M15/647D06M15/13D06M101/06
CPCC07D401/14C07H1/00C07H9/04D06M13/11D06M13/224D06M15/13D06M15/227D06M15/564D06M15/647D06M2101/06D06M2200/20
Inventor 高介平高辛格
Owner 高介平
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