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Method for preparing wool anti-shrinking agent by using epoxy resin-modified waterborne polyurethane

A water-based polyurethane and epoxy resin technology, used in textiles and papermaking, fiber processing, animal fibers, etc., can solve the problems of film-forming properties, weather resistance and water resistance of anti-shrinkage agents, and achieve soft hand feel, good water resistance, Good shrinkage resistance

Active Publication Date: 2013-12-18
TONGXIANG PUYUAN WOOLEN KNITTING TECH SERVICE CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] What the present invention aims to solve are the deficiencies such as poor film-forming property, weather resistance and water resistance existing in existing anti-shrinkage agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] In the container, add toluene diisocyanate (TDI) and polyethylene glycol (PEG2000), the molar ratio of the two is 2.0:1, heat up to 75-80°C, react for 2 hours, cool down to 70-75°C, add small molecule expansion Chain agent 1,4-butanediol (BDO), the weight percentage of BDO is 4%, react for 1-2h; add epoxy resin E-44, hydrophilic chain extender dimethylolpropionic acid (DMPA) and N -Methylpyrrolidone, react at 65-70°C for 3 hours, wherein the weight percentage of E-44 is 5%, the weight percentage of DMPA is 5%, add an appropriate amount of acetone to control the viscosity of the reaction system; after cooling to 40°C, add triethyl Neutralize with amine, emulsify in normal temperature water, add ethylenediamine to extend the chain, obtain epoxy resin modified water-based polyurethane emulsion, add water to prepare a water agent with a solid content of 20-30%, and then obtain the wool anti-shrinkage agent.

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Abstract

The invention provides a method for preparing a wool anti-shrinking agent by using epoxy resin-modified waterborne polyurethane. The method comprises the following steps of: carrying out a reaction on toluene diisocynate (TDI) and polyethylene glycol (PEG2000) for 2 hours at 75-80 DEG C; cooling to 70-75 DEG C and then adding a chain extender 1,4-butanediol (BDO), and reacting for 1-2 hours; then adding epoxy resin E-44, a hydrophilic chain extender dimethylolpropionic acid (DMPA) and N-methylpyrrolidone, reacting for 3 hours at 65-70 DEG C, and adding an appropriate amount of acetone to control the viscosity of the reaction system; and cooling to 40 DEG C, adding triethylamine to neutralize, emulsifying in normal-temperature water, adding a chain extender ethylenediamine, adding water in the obtained emulsion to prepare aqueous solution in a solid content of 20-30%, thus obtaining the wool anti-shrinking agent. In the method provided by the invention, waterborne polyurethane is modified by epoxy resin, so that the anti-shrinking agent is good in water resistance, weather resistance and film-forming strength; wool after anti-shrinking finishing is scrub-resistant, good in anti-shrinking performance, and soft in hand feel.

Description

technical field [0001] The invention relates to a preparation method of a fabric anti-shrinkage agent, in particular to a preparation method of a wool anti-shrinkage agent. Background technique [0002] The scale structure on the surface of wool is a main characteristic of wool fiber, which will lead to the anisotropic friction effect of the fiber, so that the wool fiber has shrinkage. [0003] The essence of anti-shrinkage finishing is to change the shape of scales on the surface of wool fibers and limit the mutual entanglement of wool. Chlorination anti-shrinkage technology is mainly used in the existing industrial production. This method has mature technology and good anti-shrinkage effect, but the damage to wool is relatively large, which can lead to loss of mechanical strength of wool fabric, complicated finishing process, and the AOX released by it will cause environmental problems. In contrast, the resin method has the advantages of environmental protection and conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/58C08G18/66C08G18/48C08G18/32C08G18/34D06M15/568D06M101/12
Inventor 曹月华
Owner TONGXIANG PUYUAN WOOLEN KNITTING TECH SERVICE CENT
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