Method for producing cation modified polyurethane color stabilizer

A production method and polyurethane technology are applied in the field of reactive film-forming fixatives and preparations for textiles, which can solve the problems of ineffective dyeing, and achieve the effects of improving color fastness and soft hand feeling.

Inactive Publication Date: 2008-07-09
NANTONG UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At first, dicyandiamide-based color-fixing agents were used, such as the color-fixing agent Y of Shanghai Tiantan Auxiliary Factory. Since it contains non-environmentally friendly formaldehyde, its use has been restricted; currently the most used are polyamine-based color-fixing agents, such as Zhejiang Chuan The chemical fixing agent CY-2305 is an environmentally friendly formaldehyde-free color fixing agent. This product has excellent effects on the activity of cotton and polyester cotton and the fastness of direct dyeing. Nylon, nylon and other acid dyes do not have much effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0037] 1. Polyurethane prepolymerization reaction

[0038] Add 150 grams of polyether (2000) (i.e. PPG2000) and 50 grams of polyether (600) (i.e. PEG600) into a dry reaction kettle and distill under reduced pressure at 100°C for 1 to 1.5 hours to remove trace amounts of polyether polyols. moisture. After vacuuming, cool down to 80°C, add 5 grams of DMPA, stir to dissolve evenly, add 27.5 grams of TDI dropwise with a separatory funnel, and keep the reaction temperature between 80 and 90°C.

[0039] 2. Modified chain extension reaction

[0040] Dissolve 8 grams of diethylenetriamine in 100 grams of methyl ethyl ketone in advance, and after standing for 1 hour, drop it into the above prepolymer at room temperature, react for 2 hours, add 35-40 grams of water, and raise the temperature to 53 ° C. After reacting for 30 minutes, 8.1 g of epichlorohydrin was added dropwise, and the temperature was raised to 70° C. for 3 hours to react.

[0041] 3. Blocking reaction

[0042] When ...

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PUM

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Abstract

The invention discloses a modified polyurethane color fixing agent of basic ion, which is prepared by PEG600, PPG2000, TDI, DMPA, methyl ethyl ketone, calcium trisodium diethylenetriamine pentoacetate, epichlorohydrin, acetone, isopropanol, sodium bisulfite, water and glacial acetic acid. The process for preparation comprises polyurethane prepolymerization reaction, modified chain extending reaction, blocking reaction, emulsion reaction, removing solvent and the like. The modified polyurethane color fixing agent of ion of the invention can form net-shaped cross bonding with woven fabric, and the invention adopts sodium acid sulfite to be blocking agent, which guarantees that when in application, enough isocyanate bonds are supplied to form chemical crosslinking with hydroxyl group and carboxy group with cloth surface, the invention improves various color stabilities of dyed fabric, meanwhile, the invention keeps soft hand feeling of fabric.

Description

Technical field: [0001] The present invention relates to a textile finishing agent and its preparation method, in particular to a textile reactive film-forming color-fixing agent and its preparation method. Background technique [0002] Color-fixing agent is an indispensable auxiliary in textile dyeing process. It can effectively improve the color fastness indicators of textiles, especially for cotton, polyester-cotton, silk, nylon, nylon and other fabrics. At first, dicyandiamide-based color-fixing agents were used, such as the color-fixing agent Y of Shanghai Tiantan Auxiliary Factory. Since it contains non-environmentally friendly formaldehyde, its use has been restricted; currently the most used are polyamine-based color-fixing agents, such as Zhejiang Chuan The chemical fixing agent CY-2305 is an environmentally friendly formaldehyde-free color fixing agent. This product has excellent effects on the activity of cotton and polyester cotton and the fastness of direct dyei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P5/08C08G18/12
Inventor 胡啸林杨勇黄晓林董玲宗逢春孙永辉丁树祥
Owner NANTONG UNIVERSITY
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