Method for preparing polyurethane loomage water proof and moisture permeable dressing agent

A waterproof and moisture-permeable polyurethane technology, which is applied in the preparation of polyurethane fabric waterproof and moisture-permeable finishing agents, in the field of polyurethane fabric waterproof and moisture-permeable finishing agents, can solve the problem of low response accuracy and response sensitivity of polyurethane waterproof and moisture-permeable coating materials, and waterproof Problems such as one-way moisture permeability and poor physical and mechanical properties, to achieve good physical and mechanical properties, improve response accuracy and response sensitivity, and high degree of microphase separation

Inactive Publication Date: 2009-05-06
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 2. The polyurethane waterproof and moisture-permeable coating material is a (soft segment phase region) non-crystalline material. Even if its soft segment can crystallize, its crystallization temperature is below zero, and the waterproof and moisture-permeable effect is only one-way
[0011] 3. The response accuracy and response sensitivity of polyurethane waterproof and moisture-permeable coating materials to environmental temperature changes are not high, and the physical and mechanical properties of the material are poor

Method used

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  • Method for preparing polyurethane loomage water proof and moisture permeable dressing agent
  • Method for preparing polyurethane loomage water proof and moisture permeable dressing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The raw material of this preparation method comprises:

[0055] 1. Polyether polyol

[0056] 0.40 mol of polyethylene glycol with a molecular weight of 3000, 0.60 mol of polypropylene glycol with a molecular weight of 2000, and 0.15 mol of polyglycerol with a molecular weight of 4000.

[0057] 2. Diisocyanate

[0058] 3.00 mol of 4,4'-diphenylmethane diisocyanate.

[0059] 3. Chain extender

[0060] Dimethylolpropionic acid 1.775mol.

[0061] 4. Neutralizer

[0062] Triethylamine is used to control and adjust the pH of the emulsion to be about 7-9.

[0063] 5. Additives

[0064] Acetone (appropriate amount, used to adjust the viscosity of the reaction system); methanol (appropriate amount, used to terminate the reaction); deionized water (adjust the solid content of the product to 15-20%)

[0065] Conditions and equipment of the preparation method:

[0066] Reaction pressure: minus one atmosphere ~ one atmosphere;

[0067] Reaction temperature: 30~90℃;

[0068...

Embodiment 2

[0085] The raw material of this preparation method comprises:

[0086] 1. Polyether polyol

[0087] 0.60 mol of polyethylene glycol with a molecular weight of 2000, 0.40 mol of polytetrahydrofuran diol with a molecular weight of 2000, and 0.15 mol of ethylene oxide / propylene oxide random block copolyol with a molecular weight of 4000.

[0088] 2. Diisocyanate

[0089] Toluene diisocyanate 3.60mol.

[0090] 3. Chain extender

[0091] 0.500 mol of 1,4-butanediol and 1.875 mol of N-methyldiethanolamine.

[0092] 4. Neutralizer

[0093] The amount of formic acid is controlled to adjust the pH of the finished emulsion to about 4-6.

[0094] 5. Additives

[0095] Acetone (appropriate amount, used to adjust the viscosity of the reaction system); ethanol (appropriate amount, used to terminate the reaction); deionized water (adjust the solid content of the product to 20-25%).

[0096] Preparation conditions and equipment of the preparation method:

[0097] Reaction pressure: on...

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Abstract

The invention relates to a method for preparing a waterproof and moisture permeable finishing agent of a polyurethane fabric. Raw materials for the preparation method comprise polyether polyol, vulcabond, and a chain extender, wherein the polyether polyol comprises polyether diol with a molecular weight of between 2,000 and 3,000 and polyether triol with a molecular weight of between 3,000 and 4,000; and the chain extender comprises an ion chain extendor. In the raw materials for the preparation method, the hydrophilic polyether triol with larger molecular weight substitutes the prior small molecular polylol, polyamine or polycarboxylic acid to introduce the internal crosslinking into a polyurethane soft segment phase so as to ensure that a synthesis reaction is easy to control and simultaneously consider the crystallinity, the moisture permeability and the waterproofness of polyurethane. The method overcomes the contradiction of crystallization / crosslinking and waterproofness / moisture permeability caused by adopting the small molecular polylol, polyamine or polycarboxylic acid as a crosslinking agent.

Description

technical field [0001] The invention relates to a fabric waterproof and moisture-permeable finishing agent for imparting waterproof and vapor-permeable properties to textiles and improving the wearing comfort of clothing, in particular to a polyurethane fabric waterproof and moisture-permeable finishing agent, especially a preparation method for the polyurethane fabric waterproof and moisture-permeable finishing agent. Background technique [0002] Waterproof and moisture-permeable fabric means that water does not soak into the fabric under a certain pressure, but the sweat emitted by the human body can be transmitted to the outside world through the fabric in the form of water vapor, so as to prevent sweat from accumulating and condensing between the body surface and the fabric to keep the clothing comfortable It is a high-tech, unique functional fabric. [0003] Waterproof and moisture-permeable fabrics use various coating technologies to apply waterproof and moisture-perm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/568C08G18/66C08G18/10C08J3/03C08L75/04
Inventor 权衡
Owner WUHAN TEXTILE UNIV
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