Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of novel wet rubbing fastness improver

A technology of wet rubbing fastness and improving agent is applied in the field of preparation of new wet rubbing fastness improving agent, which can solve the problem of poor wet rubbing fastness of reactive dyes, achieve stable product performance, simplify preparation process, and improve rubbing fastness. degree of effect

Active Publication Date: 2021-01-05
XI'AN POLYTECHNIC UNIVERSITY +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention provides a preparation method of a novel wet rubbing fastness improving agent, which solves the problem of poor wet rubbing fastness of reactive dyes existing in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method of a novel wet rubbing fastness improving agent is specifically implemented according to the following steps:

[0039] Step 1, adding an appropriate amount of polyethylene glycol with a molecular weight of 1000 into the reactor, vacuuming at 110-120°C for 2 hours, and dehydrating;

[0040] Step 2: Lower the temperature of the reactor to 55°C, add an appropriate amount of diisocyanate, and keep it warm for 1 hour, then raise the temperature to 70°C, keep it warm for 2 hours, and obtain a polyurethane prepolymer; wherein, the diisocyanate is isophorone diisocyanate , the molar ratio of diisocyanate to polyethylene glycol is 1.5:1.

[0041] Step 3, add an appropriate amount of small molecule polyols to the reactor for chain extension, and keep warm at 70°C for 2 hours; wherein, the small molecule polyols are 1,4 butanediol, and the molar ratio of diisocyanate to small molecule polyols is 6:1;

[0042] Step 4, add an appropriate amount of aromatic dia...

Embodiment 2

[0045] A preparation method of a novel wet rubbing fastness improving agent is specifically implemented according to the following steps:

[0046] Step 1, adding an appropriate amount of polyethylene glycol with a molecular weight of 2000 into the reactor, vacuuming at 110-120°C for 2 hours, and dehydrating;

[0047] Step 2: Lower the temperature of the reactor to 65°C, add an appropriate amount of diisocyanate, and keep it warm for 1 hour, then raise the temperature to 70°C, keep it warm for 2 hours, and obtain a polyurethane prepolymer; wherein, the diisocyanate is hexamethylene diisocyanate , the molar ratio of diisocyanate to polyethylene glycol is 1.3:1.

[0048] Step 3, adding an appropriate amount of small molecule polyols to the reactor for chain extension, and incubating at 70°C for 2 hours; wherein, the small molecule polyols are ethylene glycol, and the molar ratio of diisocyanate to small molecule polyols is 8:1 ;

[0049] Step 4, add an appropriate amount of aro...

Embodiment 3

[0052] A preparation method of a novel wet rubbing fastness improving agent is specifically implemented according to the following steps:

[0053] Step 1, adding an appropriate amount of polyethylene glycol with a molecular weight of 2000 into the reactor, vacuuming at 110-120°C for 2 hours, and dehydrating;

[0054] Step 2: Lower the temperature of the reactor to 65°C, add an appropriate amount of diisocyanate, and keep it warm for 1 hour, then raise the temperature to 70°C, keep it warm for 2 hours, and obtain a polyurethane prepolymer; wherein, the diisocyanate is isophorone diisocyanate , the molar ratio of diisocyanate to polyethylene glycol is 1.2:1.

[0055] Step 3, adding an appropriate amount of small molecule polyol to the reactor for chain extension, and incubating at 70°C for 2 hours; wherein, the small molecule polyol is propylene glycol, and the molar ratio of diisocyanate to small molecule polyol is 7:1;

[0056] Step 4, add an appropriate amount of aromatic di...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a novel wet rubbing fastness improver. The preparation method comprises the following steps: adding a proper amount of polyethylene glycol into a reactor for dehydration treatment; reducing the temperature of the reactor, adding a proper amount of diisocyanate, carrying out heat preservation reaction, heating, and continuously carrying out heat preservation reaction to obtain a polyurethane prepolymer; adding a proper amount of micromolecular polyol into the reactor for chain extension, and carrying out heat preservation reaction; adding a properamount of aromatic diamine chain extender into the reactor for chain extension, and carrying out heat preservation reaction for 1-2 hours; and adding water into the reactor to emulsify to obtain thewet rubbing fastness improver. The preparation method of the novel wet rubbing fastness improver solves the problem of poor wet rubbing fastness of reactive dyes in the prior art.

Description

technical field [0001] The invention relates to the technical field of textile printing and dyeing auxiliaries, in particular to a preparation method of a novel wet rubbing fastness improving agent. Background technique [0002] With the development of the textile printing and dyeing industry, higher requirements are put forward for the quality of various fabrics, especially higher requirements for wet rubbing fastness. However, cotton fabrics (including various types of cellulose fibers) have poor wet rubbing fastness when dyed with reactive dyes in deep colors (especially bright red, black, navy blue, etc.). Although the use of formaldehyde-free color fixing agent is of great help to soaping fastness, etc., it has little effect on wet rubbing fastness. At present, wet rubbing fastness enhancers are often used to improve the wet rubbing fastness of reactive dyes dyed deep-colored fabrics. That is to say, the wet rubbing fastness enhancer is applied to the fabric to form a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/73C08G18/66C08G18/48C08G18/10C08G18/32D06P1/38D06P5/08
CPCC08G18/755C08G18/73C08G18/4833C08G18/10C08G18/32D06P1/38D06P5/08C08G18/3206C08G18/324
Inventor 陆少锋师文钊徐成书谢艳王海珠李苏松
Owner XI'AN POLYTECHNIC UNIVERSITY