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Method for preparing waterborne polyurethane/organosilicon montmorillonite nano composite material

A technology of water-based polyurethane and organic montmorillonite, applied in polyurea/polyurethane coatings, dyed organic silicon compound treatment, fibrous fillers, etc., can solve the problems of water-based polyurethane limitations, etc., and achieve good compatibility, convenient operation and stability good sex effect

Inactive Publication Date: 2012-07-25
浙江益弹新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with solvent-based polyurethane, water-based polyurethane still has deficiencies in water resistance, bond strength, temperature change resistance, and weather resistance, which limits the application of water-based polyurethane.

Method used

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  • Method for preparing waterborne polyurethane/organosilicon montmorillonite nano composite material
  • Method for preparing waterborne polyurethane/organosilicon montmorillonite nano composite material
  • Method for preparing waterborne polyurethane/organosilicon montmorillonite nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Organizing montmorillonite with 3-(trimethoxysilyl)propyldimethyloctadecylammonium chloride

[0055] Dissolve 10 g of sodium montmorillonite Na-MMT in 90 g of distilled water, add 5 g of 3-(trimethoxysilyl) propyl dimethyl octadecyl ammonium chloride, and 100 mL of ethanol aqueous solution (50%). The mixed solution was stirred at 20°C for 100 h, then filtered with suction, and washed with deionized water until 0.1 mol / L of AgNO 3 Solution detection filtrate without precipitation, vacuum dried to constant weight, ground, sieved to obtain 325 mesh organic montmorillonite.

[0056] (2) In the reaction device equipped with electric stirrer, heating device and temperature controller, add 90g of polyether N210 after vacuum dehydration and drying, 10g of 325 mesh organic montmorillonite obtained above, and heat at 80°C for 8h , and then shear 0.5h at a shear rate of 10000rpm with a high-speed shearing machine to prepare the organic montmorillonite of polyether N210 pre-in...

Embodiment 2

[0060] (1) Organizing montmorillonite with 3-(trimethoxysilyl)propyldimethylhexadecylammonium bromide

[0061] Dissolve 10 g of potassium-based montmorillonite Ka-MMT in 990 g of distilled water, add 5 g of 3-(trimethoxysilyl) propyl dimethyl hexadecyl ammonium bromide, and 990 mL of ethanol aqueous solution (50%). The mixed solution was stirred at 90°C for 1 h, then filtered with suction, and washed with deionized water until 0.1 mol / L of AgNO 3 Solution detection filtrate without precipitation, vacuum dried to constant weight, ground, sieved to obtain 325 mesh organic montmorillonite.

[0062] (2) In the reaction device equipped with electric stirrer, heating device and temperature controller, add 70g of polyether N210 after vacuum dehydration and drying, 30g of 325 mesh organic montmorillonite obtained above, and heat at 130°C for 3h , and then shear 0.5h at a shear rate of 10000rpm with a high-speed shearing machine to prepare the organic montmorillonite of polyether N210...

Embodiment 3

[0066] (1) Organizing montmorillonite with 3-(trimethoxysilyl)propyldimethylpentyl ammonium chloride

[0067] Dissolve 10g of calcium-based montmorillonite Ca-MMT in 90g of distilled water, add 50g of 3-(trimethoxysilyl)propyldimethylpentylammonium chloride, and 100mL of ethanol aqueous solution (50%), and mix the above The solution was stirred at 80°C for 4 h, then filtered with suction, and washed with deionized water until 0.1 mol / L of AgNO 3 Solution detection filtrate without precipitation, vacuum dried to constant weight, ground, sieved to obtain 325 mesh organic montmorillonite.

[0068] (2) In the reaction device equipped with electric stirrer, heating device and temperature controller, add 90g of polyether N210 after vacuum dehydration and drying, 10g of 325 mesh organic montmorillonite obtained above, and heat at 90°C for 4h , and then sheared for 2 hours at a shear rate of 10,000 rpm with a high-speed shearing machine to prepare polyether N210 pre-intercalated orga...

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Abstract

The invention relates to a method for preparing a waterborne polyurethane / organosilicon montmorillonite nano composite material, which comprises the following steps of: adding organic montmorillonite of a pre-intercalation layer into a prepolymer; performing pre-polymerization, neutralization and emulsification in the presence of a catalyst; and performing secondary chain extension in water to obtain the composite material. The organic montmorillonite of the pre-intercalation layer is prepared by stirring and dispersing 1 mass part of the organic montmorillonite and 2 to 100 mass parts of polymer polyhydric alcohol A for 3 to 8 hours at the temperature of between 80 and 130 DEG C, and then shearing the mixture by using a high-speed shearing machine for 0.5 to 2 hours. The organic montmorillonite is prepared by the following steps of: dissolving montmorillonite in distilled water; adding organosilicon quaternary ammonium salt shown as a formula (I) and 50-percent ethanol into the mixture to prepare mixed solution; and stirring the mixture for 1 to 100 hours at the temperature of between 20 and 90 DEG C, and treating the mixture to obtain the organic montmorillonite. The method has the advantages of low cost, simple process, convenient operation and environmental protection. The prepared composite material has high stability and an extensive application prospect.

Description

(1) Technical field [0001] The invention relates to a preparation method of a waterborne polyurethane / organosilicon montmorillonite nanocomposite material, in particular to a preparation method of a waterborne polyurethane / organosilicon quaternary ammonium salt modified montmorillonite nanocomposite material. (2) Background technology [0002] Water-based polyurethane (WPU) refers to polyurethane that uses water as the dispersion medium and does not contain or contain a very small amount of organic solvents. Because of its non-combustible, non-toxic, non-polluting, energy-saving and other advantages, it has developed rapidly in recent years and has been widely used in leather finishing, architectural coatings, automotive coatings, wood coatings and other fields. However, compared with solvent-based polyurethane, water-based polyurethane still has deficiencies in water resistance, bond strength, temperature resistance, and weather resistance, which limits the application of w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/12C08K9/06C08K3/34C09C1/28C09C3/12C09D175/04D06M15/564
Inventor 裴文孙莉王菊华张秀花高倩
Owner 浙江益弹新材料科技有限公司
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