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Sulfonate type water-based polyurethane emulsion and preparation method thereof

A water-based polyurethane and sulfonate-based technology, applied in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, adhesive types, etc., can solve the irritating odor of residual triethylamine and the stability of water-based polyurethane emulsion Reduce the problem of environmental protection, improve mechanical properties and heat resistance, and achieve the effect of high solid content

Inactive Publication Date: 2014-03-12
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation process of waterborne polyurethane, the hydrophilic group is the most critical factor. In the current industrial production and laboratory research, the carboxylate-type hydrophilic chain extender dimethylol propionic acid (DMPA) is mainly used. ) or dimethylolbutyric acid (DMBA) are hydrophilic monomers, and the use of these two hydrophilic monomers requires neutralization and salt formation before emulsification with water. The most widely used neutralization and salt formation agent is three Ethylamine, and the unpleasant irritating smell of triethylamine may remain in the water-based polyurethane emulsion obtained by triethylamine neutralization and salt-forming emulsification, and triethylamine may decompose and volatilize during the storage of the emulsion, resulting in water-based polyurethane emulsion. Decreased stability of polyurethane emulsion

Method used

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  • Sulfonate type water-based polyurethane emulsion and preparation method thereof
  • Sulfonate type water-based polyurethane emulsion and preparation method thereof
  • Sulfonate type water-based polyurethane emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Synthesis of Diethylene Glycol Isophthalate-5-Sodium Sulfonate:

[0045] Under the condition of heating and mechanical stirring, 0.05mol dimethyl isophthalate-5-sodium sulfonate, 0.4mol ethylene glycol and 0.5wt% monobutyltin oxide are added in the there-necked flask equipped with a fractionation device, Under the protection of nitrogen atmosphere, the temperature was slowly raised to 180° C., and the reaction was carried out at this temperature for 7 hours. When there is no distillate from the fractionating head, replace the vacuum distillation device and continue the reaction at 220°C for 30 minutes. Cool down to room temperature and discharge to obtain a transparent liquid.

[0046] Synthesis of waterborne polyurethane emulsion:

[0047] (1) Add 17.6 parts by mass of diethylene glycol isophthalate-5-sodium sulfonate to a four-necked flask equipped with a reflux condenser, a thermometer, a stirrer and a nitrogen conduit, at a temperature of 80°C Dry and dehydrate u...

Embodiment 2

[0052] Synthesis of diethylene glycol isophthalate-5-sodium sulfonate:

[0053] Under the conditions of heating and mechanical stirring, add 0.05mol dimethyl isophthalate-5-sodium sulfonate, 0.3mol diethylene glycol and 0.6wt% monobutyltin oxide into a three-necked flask equipped with a fractionation device , under the protection of a nitrogen atmosphere, the temperature was slowly raised to 230° C., and the reaction was carried out at this temperature for 3 hours. When there is no distillate from the fractionating head, replace the vacuum distillation device and continue the reaction at 230°C for 30 minutes. Cool down to room temperature and discharge to obtain a transparent liquid.

[0054] Synthesis of waterborne polyurethane emulsion:

[0055] (1) Add 22.2 parts by mass of diethylene glycol isophthalate-5-sodium sulfonate in a four-necked flask equipped with a reflux condenser, a thermometer, a stirrer and a nitrogen conduit, and Vacuum drying and dehydration at a tempe...

Embodiment 3

[0060] Synthesis of Diethylene Glycol Isophthalate-5-Sodium Sulfonate:

[0061] Under the condition of heating and mechanical stirring, 0.05mol dimethyl isophthalate-5-sodium sulfonate, 0.2mol triethylene glycol and 0.7wt% zinc acetate are added in a three-necked flask equipped with a fractionation device. Under the protection of nitrogen atmosphere, the temperature was slowly raised to 230° C., and the reaction was carried out at this temperature for 3 hours. When there is no distillate from the fractionating head, replace the vacuum distillation device and continue the reaction at 230°C for 30 minutes. Cool down to room temperature and discharge to obtain a transparent liquid.

[0062] Synthesis of waterborne polyurethane emulsion:

[0063] (1) Add 26.6 parts by mass of diethylene glycol isophthalate-5-sodium sulfonate in a four-necked flask equipped with a reflux condenser, a thermometer, a stirrer and a nitrogen conduit, and at 110 Vacuum drying and dehydration at a tem...

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Abstract

The invention belongs to the technical field of water-based polyurethane emulsion, and discloses a sulfonate type water-based polyurethane emulsion and a preparation method thereof. The sulfonate type water-based polyurethane emulsion comprises the following components in parts by mass: 20-70 parts of diisocyanate, 100-300 parts of polyol, 7-100 parts of sulfonate type dihydric alcohol, 2-20 parts of ethylenediamine, 130-500 parts of water and 0.05-1 part of catalyst. The synthesis method disclosed by the invention is simple and environment-friendly and has relatively low cost; by adopting the method, the emulsion with high solid content is easy to prepare, and the prepared emulsion has good stability; an adhesive film has relatively good water resistance and heat resistance. The emulsion disclosed by the invention can be used as a coating, an adhesive, a leather finishing agent and the like, and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of water-based polyurethane emulsion, and in particular relates to a sulfonate-type water-based polyurethane emulsion and a preparation method. Background technique [0002] Polyurethane is the abbreviation of polyurethane, which is usually obtained by stepwise polymerization of dibasic or polyisocyanate and diol. Because of its excellent low temperature resistance, wear resistance, embrittlement resistance, high tensile strength, good flexibility, good elasticity and structural designability, it is widely used as coatings, adhesives, leather finishing agents, etc. field. In the past ten years, with the improvement of people's awareness of environmental protection and safety considerations, some developed countries have successively formulated corresponding solvent regulations, thus limiting the development of solvent-based polyurethane. The water-based polyurethane uses water as the medium, and has the ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/38C08G18/12C08G18/32C09D175/04C09J175/04C14C11/00
CPCC08G18/0828C08G18/12C08G18/3855C08G18/44C08G18/6633C08G18/3228
Inventor 梁利岩杨成华吕满庚
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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