Polyurethane-acrylic ester composite emulsion of core-shell interpenetrating polymer network structure and preparation method thereof

An interpenetrating network structure and acrylate technology, which is applied in the field of polyurethane-acrylate composite emulsion and its preparation, can solve the problems of low film-forming temperature of water-based polyurethane, pollution of organic solvent process, good wear resistance, etc., and can reach the film-forming temperature Low, avoids the cumbersome process of extracting organic solvents in the later stage, and has good wear resistance

Active Publication Date: 2015-12-23
SKSHU PAINT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a polyurethane-acrylate composite emulsion with a core-shell interpenetrating network structure and a preparation method thereof, which solves the problem that water-based polyurethane cannot have both low film-forming temperature, good wear resistance, and excellent chemical corrosion resistance. Adhesion, water resistance, solvent resistance, technical issues with good mechanical properties
The present invention further solves the cumbersome technical problems of pollution caused by the use of organic solvents in the preparation method of water-based polyurethane emulsion and the cumbersome process of extracting organic solvents in the later stage

Method used

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  • Polyurethane-acrylic ester composite emulsion of core-shell interpenetrating polymer network structure and preparation method thereof

Examples

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specific Embodiment approach

[0041] A polyurethane-acrylate composite emulsion with a core-shell interpenetrating network structure, which is formulated from the following components in the following parts by weight ratio:

[0042]

[0043] A method for preparing a polyurethane-acrylate composite emulsion with a core-shell interpenetrating network structure, comprising the following steps in sequence:

[0044] 1) Prepare polyurethane prepolymer:

[0045]Add 24.00-26.00 parts of polyester polyol and 25.36-30.18 parts of isophorone diisocyanate into the reactor, control the stirring speed of the reactor at 300-500rpm, heat to 80-85°C under the protection of nitrogen, and react to the measured The obtained -NCO content reaches the theoretical value, then add 42.00-46.00 parts of active diluent to adjust the viscosity of the system, then add 4.00-5.00 parts of hydrophilic chain extender, 0.50-1.00 parts of trimethylolpropane (TMP), 2.66-3.27 parts of dihydric alcohol, 0.04-0.08 parts of dibutyltin dilaura...

Embodiment 1

[0056] A polyurethane-acrylate composite emulsion with a core-shell interpenetrating network structure, which is formulated from the following components in the following parts by weight ratio:

[0057]

[0058] A kind of preparation method of the polyurethane-acrylic ester composite emulsion emulsion with core-shell interpenetrating network structure, comprises the following steps in sequence:

[0059] 1) Preparation of polyurethane prepolymer:

[0060] In a 500mL four-necked flask equipped with a stirrer, a thermometer, and a condenser tube, add 25 parts by mass of polyester polyol and 25.36 parts by mass of isophorone diisocyanate, and heat to 85°C at a stirring speed of 500rpm under nitrogen protection. To the measured -NCO content reaches the theoretical value (16.94%), then add 13.2 parts by mass of methyl methacrylate, 30.8 parts by mass of butyl methacrylate to adjust the viscosity of the system, then add 5 parts by mass of hydrophilic extender Chain agent 2,2-dime...

Embodiment 2

[0068] A polyurethane-acrylate composite emulsion with a core-shell interpenetrating network structure, which is formulated from the following components in the following parts by weight ratio:

[0069]

[0070]

[0071] A kind of preparation method of the polyurethane-acrylic ester composite emulsion emulsion with core-shell interpenetrating network structure, comprises the following steps in sequence:

[0072] 1) Preparation of polyurethane prepolymer:

[0073] In a 500mL four-neck flask equipped with a stirrer, a thermometer, and a condenser tube, add 24.00 parts by mass of polyester polyol and 30.18 parts by mass of isophorone diisocyanate, stir at 500 rpm, and heat to 85°C under nitrogen protection. React until the measured -NCO content reaches the theoretical value (18.76%), then add 11.2 parts by mass of methyl methacrylate, 30.8 parts by mass of butyl methacrylate to adjust the viscosity of the system, and then add 4.00 parts by mass of hydrophilic Chain extende...

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Abstract

The invention relates to polyurethane-acrylic ester composite emulsion of a core-shell interpenetrating polymer network structure and a preparation method thereof. The polyurethane-acrylic ester composite emulsion is prepared from polyester polyol, isophorone diisocyanate, reactive diluent, a hydrophilic chain-extending agent, trimethylolpropane, dihydric alcohol, dibutyltin dilaurate, hydroxyethyl acrylate, a neutralizing agent, water, an aqueous phase chain-extending agent, an initiating agent and initiating agent diluting solvent. The polyurethane-acrylic ester composite emulsion and the preparation method thereof have the following advantages that the problem that water resistance is lowered due to addition of emulsifier is solved; pollution caused by organic solvent and tediousness of the later-period organic solvent extraction technology are avoided. The emulsion is polyurethane-acrylic ester copolymer emulsion of a core-shell crosslinking interpenetrating polymer network structure.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a polyurethane-acrylate composite emulsion with a core-shell interpenetrating network structure and a preparation method thereof. Background technique [0002] With the increasing awareness of environmental protection in various countries around the world, some environmental protection regulations have been formulated to limit the emission of volatile organic compounds (VOC) to the atmosphere. High performance and environmental protection have become the development direction of coatings. Therefore, almost all technicians in the coating industry are paying attention to the content of solvents and the research and development of solvent-free coatings. Water-based paint, as a paint that uses water as a solvent, has long been recognized by people. Various water-based coatings have also come out one after another and are quickly accepted by the market. [0003] Polyure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F299/02C08G18/67C08G18/66C08G18/42C08G18/34C08G18/32C08G18/12C08G18/08
Inventor 洪杰王艳林伟
Owner SKSHU PAINT
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