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Waterborne polyurethane-polyacrylate emulsion and preparation method thereof

A technology of polyacrylate emulsion and water-based polyurethane, which is applied in the field of water-based polyurethane-polyacrylate emulsion and its preparation, can solve the problems affecting the overall performance of the emulsion, the emulsion is prone to crosslinking, and the particle size is large, so as to achieve excellent water resistance, High solvent resistance and uniform particle size

Inactive Publication Date: 2011-02-09
中国科学院嘉兴应用化学工程中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the emulsion particles prepared by the method contain PUA composite emulsion in the structure, most of them still exist with simple PA and PU, which affects the comprehensive performance of the emulsion; (3) interpenetrating network method, the prepared emulsion can make PU and PA The chain reaches the blending at the molecular level, and the performance of the emulsion is improved, but the emulsion is prone to crosslinking and the particle size is large

Method used

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  • Waterborne polyurethane-polyacrylate emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The composition list of waterborne polyurethane-polyacrylate emulsion formula is as follows:

[0043] Waterborne polyurethane-polyacrylate emulsion formulation 1:

[0044] Toluene diisocyanate (TDI): 41.8g

[0045] Polyether polyol (N210): 30.0g

[0046] p-Hydroxyanisole: 0.002g

[0047] Dibutyltin dilaurate (DBTD): 0.05g

[0048] Hydroxyethyl acrylate: 9.3g

[0049] Dimethylolpropionic acid (DMPA): 8.0g

[0050] Triethylamine (TEA): 6.0g

[0051] 1,4-butanediol (BDO): 3.6g

[0052] Ethylenediamine (EDA): 4.2g

[0053] Methyl methacrylate (MMA): 20.0g

[0054] Butyl acrylate: 12.0g

[0055] Acrylonitrile: 8.0g

[0056] Azobisisobutyronitrile (AIBN); 0.4g

[0057] Deionized water: 220.0g

[0058] In a 500ml three-neck flask equipped with a thermometer and a stirring device, add hydroxyethyl acrylate containing an active group ethylenic monomer and excess toluene diisocyanate (TDI) monomer, the molar ratio of the two is 1:3, add a small amount The polymerizat...

Embodiment 2

[0060] The composition list of waterborne polyurethane-polyacrylate emulsion formula is as follows:

[0061] Waterborne polyurethane-polyacrylate emulsion formulation 2:

[0062] Isophorone dicyanate (IPDI) 44.4g

[0063] Polyether polyol (N210) 35.0g

[0064] p-tert-butylcatechol (TBC) 0.001g

[0065] Dibutyltin dilaurate (DBTD) 0.04g

[0066] N-Methylolacrylamide 5.0g

[0067] Dimethylolpropionic acid (DMPA) 6.0g

[0068] Triethylamine (TEA) 4.5g

[0069] 1,6-butanediol 3.0g

[0070] Ethylenediamine (EDA) 4.8g

[0071] Methyl methacrylate (MMA) 15.0g

[0072] Ethyl acrylate 7.0g

[0073] Acrylonitrile 10.0g

[0074] Azobisisobutyronitrile (AIBN) 0.4g

[0075] Deionized water 230g

[0076] N-methylolacrylamide, an ethylenic monomer containing active groups, and excess isophorone dicyanate (IPDI) monomer, the molar ratio of the two is 1:4, and a small amount of polymerization inhibitor p-tert-butyl o Hydroquinone (TBC), the temperature is controlled at 30°C, heat ...

Embodiment 3

[0078] The composition list of waterborne polyurethane-polyacrylate emulsion formula is as follows:

[0079] Waterborne polyurethane-polyacrylate emulsion formulation 3:

[0080] Isophorone dicyanate (IPDI): 47.5g

[0081] Polytetrahydrofuran polyol (Mw=1000): 40.0g

[0082] Hydroquinone: 0.001g

[0083] Stannous octoate: 0.04g

[0084] Hydroxypropyl methacrylate: 5.1g

[0085] Dimethylolpropionic acid (DMPA): 7.2g

[0086] Triethylamine (TEA): 4.6g

[0087] 1,6-Butanediol: 3.2g

[0088] Ethylenediamine (EDA): 4.5g

[0089] Methyl methacrylate (MMA): 16.0g

[0090] Butyl acrylate: 7.0g

[0091] Acrylonitrile: 9.0g

[0092] Azobisisobutyronitrile (AIBN): 0.4g

[0093] Deionized water: 250g

[0094] Hydroxypropyl methacrylate, an ethylenic monomer containing active groups, and excess isophorone dicyanate (IPDI) monomer, the molar ratio of the two is 1:6, and a small amount of hydroquinone, a polymerization inhibitor, is added , the temperature was controlled at 25°C...

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Abstract

The invention relates to aqueous polyurethane-polyacrylate emulsion and a preparation method thereof. In the preparation method of the aqueous polyurethane-polyacrylate emulsion, vinyl monomers containing reactive groups react with an excess of polyisocyanate under the controlled conditions of a minute amount of a polymerization inhibitor and low temperature to produce partially single terminatedvinyl isocyanate; the partially single terminated vinyl isocyanate reacts with a polyhydric alcohol polymer to produce a prepolymer; small amounts of acrylate monomers are added as a thinner; an neutralizer and a small molecule chain extendor are added; the product is dispersed into de-ionized water after reaction; an initiator and remaining acrylate monomers are added, thus getting the stable aqueous polyurethane-polyacrylate emulsion after polymerization. The aqueous polyurethane-polyacrylate emulsion has the characteristics of being free of organic solvent, being friendly to the environment, small and uniform particle size, excellent mechanical property of emulsion film coating, high resistivity against water, high solvent resistance, high hardness and adhesion.

Description

technical field [0001] The invention relates to a water-based polyurethane-polyacrylate emulsion and a preparation method thereof. Background technique [0002] With the promulgation of more stringent environmental protection regulations in various countries and the enhancement of environmental protection awareness, the content of volatile organic compounds (VOC) in traditional solvent-based coatings has been strictly controlled, which has promoted the rapid development of environmentally friendly water-based coatings. Polyurethane (PU) emulsion and polyacrylate emulsion have been widely used in coatings, adhesives and other fields. Polyurethane has the advantages of good physical and mechanical properties, excellent cold resistance, elasticity, high gloss and good resistance to organic solvents, but the water resistance of polyurethane resin coating film is not good, and its mechanical strength is not as good as that of acrylic resin (PA); acrylic resin has mechanical prope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/63C08G18/67
Inventor 祝阳吕满庚常东亮
Owner 中国科学院嘉兴应用化学工程中心
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