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Nonionic aqueous polyurethane emulsion and preparation method thereof

A water-based polyurethane and non-ionic technology, applied in the field of polymer materials, can solve the problems of large amount of non-ionic chain extenders, unstable non-ionic emulsion, and insufficient stability of the emulsion, and achieve good placement stability, large application range, good elasticity

Inactive Publication Date: 2012-05-02
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a non-ionic water-based polyurethane emulsion and its preparation method to solve the instability of the non-ionic emulsion caused by the instability of the raw materials. The polyurethane sizing product applied to the glass fiber sizing agent relies on imports and is expensive. And other issues
[0006] Add a small amount of hydrophilic chain extender, but under the premise that the amount added does not affect the non-ionic nature of the emulsion, to solve the phenomenon that the amount of non-ionic chain extender used is large, and the emulsion is not stable enough and prone to delamination

Method used

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  • Nonionic aqueous polyurethane emulsion and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Taking the production of about 300 kg of non-ionic water-based polyurethane emulsion as an example, the ratio of raw materials adopts the lower limit value, and the low-level varieties of small molecule chain extenders and amine neutralizers are used as raw materials such as diethylene glycol and isophorone diamine.

[0040] formula:

[0041] 71.8kg of polytetramethylene ether glycol with a number average molecular weight of 2000 and a hydroxyl value of 56.5KOH㎎ / g, 22kg of isophorone diamine diisocyanate, 0.2kg of diethylene glycol, and linear polyethylene glycol Diol bifunctional methyl ether 4㎏, dimethylolpropionic acid 1.2kg, trimethylolpropane 0.6kg, acetone 38.4kg, stannous octoate 0.03kg, dimethylaminoethanol 0.8kg, deionized water 205kg, iso 1.2kg of phoerone diamine, 0.4kg of water-based wetting agent (that is, the German high company 440), and 0.4kg of water-based leveling agent (that is, the German high company 440).

[0042] Preparation Process:

[0043] 1....

Embodiment 2

[0049] Taking the production of about 270 kg of non-ionic water-based polyurethane emulsion as an example, the formula ratio of raw materials adopts an intermediate value, and the lower varieties of raw materials of small molecule chain extender and amine neutralizer are 1.4 cyclohexanedimethanol and ethylenediamine.

[0050] formula:

[0051] Polycarbonate diol with a number average molecular weight of 2000 and a hydroxyl value of 57.4KOH㎎ / g: 61.5㎏, 4.4 cyclohexyl-methyl-diisocyanate 29.4㎏, 1.4 cyclohexanedimethanol 0.8㎏, linear polyethylene glycol Alcohol bifunctional methyl ether 6kg, dimethylolpropionic acid 1.6kg, trimethylolpropane 0.72kg, acetone 48kg, stannous octoate 0.06kg, dimethylaminoethanol 1.06kg, deionized water 165kg, ethylene glycol 3.6kg of amine, 1.2kg of water-based wetting agent (that is, High Company 440 in Germany), and 1.2kg of water-based leveling agent (that is, High Company 440 in Germany).

[0052] Process:

[0053] 1. Prepolymerization: Under th...

Embodiment 3

[0059] Taking the production of about 230 kg of non-ionic water-based polyurethane emulsion as an example, the upper limit is adopted for the formula ratio of raw materials, and the lower varieties of diethylene glycol and isophorone diamine are used as raw materials for small molecule chain extenders and amine neutralizers.

[0060] formula:

[0061] 51.8kg of polytetramethylene ether glycol with a number average molecular weight of 2000 and a hydroxyl value of 56.5KOH㎎ / g, 36kg of isophorone diamine diisocyanate, 1.2kg of diethylene glycol, and linear polyethylene glycol Diol bifunctional methyl ether 8kg, dimethylolpropionic acid 2kg, trimethylolpropane 1kg, acetone 57.6kg, stannous octoate 0.09kg, dimethylaminoethanol 1.3kg, deionized water 125kg, iso 6 kg of phoerone diamine, 2 kg of water-based wetting agent (that is, the German high company 440), and 2 kg of water-based leveling agent (that is, the German high company 440).

[0062] Preparation Process:

[0063] 1. Pre...

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Abstract

The invention discloses a nonionic aqueous polyurethane emulsion and a preparation method thereof, belonging to the technical field of high-molecular materials. The nonionic aqueous polyurethane emulsion comprises polyether polyol or polyester polyol, isocyanate, micromolecular chain extender, nonionic hydrophilic chain extender, hydrophilic chain extender, 0.6-1 weight portions of cross-linking agent, lower boiling point solvent, catalyst, amine neutralizer, amine chain extender, 0.4-2 weight portions of aqueous wetting agent, and aqueous levelling agent. The preparation method is characterized in that: prepolymerization, polymerization, emulsification, distillation, compounding are carried out to prepare the nonionic aqueous polyurethane emulsion, then the aqueous wetting agent and aqueous levelling agent are added with stirring to obtain an aqueous nonionic polyurethane glass fibre impregnating compound. The prepared nonionic aqueous polyurethane emulsion disclosed herein has the advantages of good stability, long stable phase, wide application scope, high strength, wear resistance, good elasticity, yellow stain resistance, aging resistance, solvent resistance, low temperature resistance, tortuosity resistance, good penetration, compatibility, good interface chemical combination or chemisorption and other excellent performances.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of water-based polyurethane emulsion. Background technique [0002] In the production of glass fiber, sizing agent is an indispensable auxiliary agent. The film-forming agent used in the early stage is mainly composed of starch and paraffin. Although they can endow the glass fiber with better bundling properties, they are compatible with the reinforced material. Poor performance, the sizing agent needs to be removed before being used in composite materials. With the development of the chemical industry, more and more synthetic resins are used as film-forming agents, mainly: polyvinyl acetate resin, polyester resin, epoxy resin, acrylic resin , polyurethane resin, etc. Polyurethane emulsion has become the fastest-growing new type of film-forming agent among sizing film-forming agents due to its excellent performance. At present, the only...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08G18/66C08G18/48C08G18/44C08G18/12C03C25/32
Inventor 刘杰华马福兰刘娅林孙海园赵元海
Owner SHANDONG TIANQING TECH DEV
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