Cationic waterborne polyurethane/organic montmorillonoid composite resin and preparation method thereof

A technology of water-based polyurethane and organic montmorillonite, which is applied in the field of chemical products to achieve the effect of improving mechanical properties

Inactive Publication Date: 2010-04-28
QINGDAO UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no environmentally friendly resin with good water resistance and solvent resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A cationic water-based polyurethane / organic montmorillonite composite resin is formed by mixing the following components by weight:

[0029] Cationic waterborne polyurethane / montmorillonite prepolymer 25 parts

[0030] 60 parts of water.

[0031] The cationic waterborne polyurethane / montmorillonite prepolymer is prepared from active organic montmorillonite, compounds containing isocyanate groups and compounds containing hydroxyl groups.

[0032] Montmorillonite (MMT) is a silicate clay mineral with layered structure and layered crystallization. Montmorillonite crystal particles are fine, usually in the form of sheet-like aggregates, about 0.2 to 1.0 microns. The layers of montmorillonite contain a lot of Na + 、K + , Ca 2+ , Mg 2+ It has strong adsorption capacity and ion exchange capacity. These ions can carry out ion exchange reaction with organic compounds containing quaternary ammonium salts. The montmorillonite after the ion exchange reaction is an organic mo...

Embodiment 2

[0042] A cationic water-based polyurethane / organic montmorillonite composite resin is formed by mixing the following components by weight:

[0043] Cationic waterborne polyurethane / montmorillonite prepolymer 32 parts

[0044] 62 parts of water.

[0045] Others are basically the same as those in Embodiment 1, and will not be repeated here.

Embodiment 3

[0047] A cationic water-based polyurethane / organic montmorillonite composite resin is formed by mixing the following components by weight:

[0048] Cationic waterborne polyurethane / montmorillonite prepolymer 40 parts

[0049] 75 parts of water.

[0050] Others are basically the same as those in Embodiment 1, and will not be repeated here.

[0051] Applied to specific components, the specific implementation results are as follows:

[0052] (1) Get 15g polytetrahydrofuran ether glycol (Mn=1000g·mol -1 ), 3g castor oil and 0.5g active organic montmorillonite were added to a 250mL three-necked flask, then heated to 100°C and stirred for 2h under the action of ultrasonic waves, then heated to 105°C, and degassed with a vacuum pump for 1h. After degassing, lower the temperature to 60°C, add 20.2g of toluene diisocyanate, then raise the temperature to 80°C and stir for 2h, then cool down to 70°C, add 2.8g of N-methyldiethanolamine, then raise the temperature to 80°C for 2h After ...

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Abstract

The invention discloses a cationic waterborne polyurethane/organic montmorillonoid composite resin. Organic montmorillonoid containing hydroxyl functional group is utilized as modifier and mixed with polymer polyalcohol and castor oil in an ultrasonic homogenizer for a period of time, then the mixture is dehydrated under vacuum condition, and polyisocyanates is added to prepare NCO sealed end prepolymer, and then cationic hydrophilic monomer methyl diethanolamine is added to introduce hydrophilic functional group to polyurethane molecular chain. After reaction, dibastic alcohol with small molecular weight is added for carrying out chain expansion reaction. After reaction, acetic acid is added to neutralize tertiary nitrogen atom on main molecular chain of polyurethane, so as to form ammonium base cation. After emulsification by watering, solvent with low molecular weight such as acetone and the like is removed by distillation, thus obtaining the cationic waterborne polyurethane/organic montmorillonoid composite resin.

Description

technical field [0001] The invention relates to the technical field of chemical products, in particular to a cationic waterborne polyurethane / organic montmorillonite composite resin and a preparation method thereof. Background technique [0002] Polyurethane is a class of polymers containing carbamate groups in the molecular chain. Polyurethane is formed by the reaction of molecules containing active hydrogen atoms with molecules containing isocyanate groups. Oligomer molecules containing hydroxyl atoms include polyether polyols, polyester polyols, etc., which constitute the soft segment in the polyurethane macromolecular chain, providing flexibility and stretchability for the macromolecules. Molecules containing isocyanate groups react with small molecule chain extenders (diols, diamines) to form hard segments in polyurethane macromolecules, providing strength to macromolecules. Polyurethane has the characteristics of high strength, abrasion resistance, low temperature re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08G18/83C08G18/12C08G18/67C08G18/64
Inventor 李再峰王胜军李金艳夏文强李广志
Owner QINGDAO UNIV OF SCI & TECH
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