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Preparation method of water-based polyurethane/acrylate compound emulsion used for damping paint

A water-based polyurethane and acrylate technology, applied in coatings and other directions, can solve the problems of complex process, narrow temperature range of emulsion damping, and use restrictions, and achieve the effect of overcoming high temperature viscous flow and low VOC content

Inactive Publication Date: 2019-02-12
吉林希尔工业新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The publication number is CN 101508762A, which discloses a method for preparing a polyester polyurethane damping material. The damping temperature range of the emulsion prepared by this method is narrow, and its use is limited.
The publication number is CN 105646826A, which discloses a method for preparing a rod-shaped ZnO-doped ester ether copolymerized polyurethane damping material. The materials used are expensive, the process is complicated, and the difficulty of industrialization increases.

Method used

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  • Preparation method of water-based polyurethane/acrylate compound emulsion used for damping paint
  • Preparation method of water-based polyurethane/acrylate compound emulsion used for damping paint
  • Preparation method of water-based polyurethane/acrylate compound emulsion used for damping paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In a four-necked flask equipped with a stirring device, a condenser, a thermometer and protected by nitrogen, add 40 g of polytetrahydrofuran glycol (number average molecular weight of 2000), vacuum dehydration at 100°C for 1.5 hours, and then add isophor 26g of ketone diisocyanate, 4g of castor oil, 3g of small molecule chain extender 1,4-butanediol, 6g of hydrophilic chain extender dimethylolpropionic acid and 0.1g of catalyst dibutyltin dilaurate. The system is heated to 75 React for 2h at °C, add 5g of hydroxyethyl methacrylate, a blocking agent, and react for 1h.

[0040] The temperature of the system was quickly cooled to 30°C, 70ml of acetone was added to reduce the viscosity, when the -NCO value of the system reached the theoretical value, 4g of salt-forming agent triethylamine was added, the reaction was continued for 10 minutes, and then deionized water was added to adjust the rotation of the stirring device 1000rad / min, emulsify at room temperature for 30min to ...

Embodiment 2

[0045] In a four-necked flask equipped with a stirring device, a condenser, a thermometer and protected by nitrogen, add 40 g of polytetrahydrofuran glycol (number average molecular weight of 2000), vacuum dehydration at 100°C for 1.5 hours, and then add isophor 26g of ketone diisocyanate, 3g of castor oil, 4g of small molecule chain extender 1,4-butanediol, 6g of hydrophilic chain extender dimethylolpropionic acid and 0.1g of catalyst dibutyltin dilaurate. The system is heated to 75 React for 2h at °C, add 4g of hydroxyethyl methacrylate, a blocking agent, and react for 1h.

[0046] The temperature of the system was quickly cooled to 30°C, 70ml of acetone was added to reduce the viscosity, when the -NCO value of the system reached the theoretical value, 4g of salt-forming agent triethylamine was added, the reaction was continued for 10 minutes, and then deionized water was added to adjust the rotation of the stirring device 1000rad / min, emulsify at room temperature for 30min to ...

Embodiment 3

[0050] In a four-necked flask equipped with a stirring device, a condenser, a thermometer and protected by nitrogen, add 20g of polypropylene glycol polyether (number average molecular weight is 1000), vacuum dehydration at 100℃ for 1.5h, and then add toluene diisocyanate 20g, castor oil 5g, small molecule chain extender propylene glycol 4g, hydrophilic chain extender dimethylolpropionic acid 6g, and catalyst dibutyltin dilaurate 0.1g, the system is heated to 75°C for 2h, and end capping agent A is added 5g hydroxyethyl acrylate, react for 1h.

[0051] The temperature of the system was quickly cooled to 30°C, 50ml of acetone was added to reduce the viscosity, when the -NCO value of the system reached the theoretical value, 4g of salt-forming agent triethylamine was added, and the reaction was continued for 10 minutes, and then deionized water was added, and the rotation of the stirring device was adjusted to 1000rad / min, emulsify at room temperature for 30min to obtain an aqueous...

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Abstract

The invention discloses water-based polyurethane / acrylate compound emulsion used for paint, and belongs to the technical field of paint. The emulsion is prepared from polyether polyol, polyisocyanatemonomer, castor oil, a micro-molecule chain extender, a hydrophilic chain extender, a salt-forming agent, an end-capping agent, acrylate monomer and the like. The invention further provides a preparation method of the water-based polyurethane / acrylate compound emulsion; according to the method, the polyether polyol, the polyisocyanate monomer, the castor oil and the hydrophilic chain extender aresubjected to step-by-step polymerization according to a certain ratio, then the end-capping agent is added for end capping, end-capped anionic water-based polyurethane emulsion is prepared, and then the acrylate monomer and styrene are added for continuous polymerization, so that the core-shell water-based polyurethane / acrylate compound emulsion is formed. After the water-based polyurethane emulsion used for the wide-temperature range damping paint is subjected to finishing and film forming, tan delta>=0.3, and an effective temperature range can be higher than 160 DEG C.

Description

Technical field [0001] The invention belongs to the technical field of coatings, and specifically relates to a method for preparing a water-based polyurethane / acrylate composite emulsion for a wide temperature range damping coating. Background technique [0002] With the rapid development of the national economy and the widespread use of high-speed machinery, noise pollution has become increasingly serious. As one of the public hazards in society, noise has attracted much attention from the government and citizens. As a result, materials for reducing vibration and noise have been developed day by day. Damping material is a kind of vibration damping material, which is widely used in daily life. [0003] Because traditional solvent-based damping materials are highly polluting and harmful to the body, with the improvement of people's living standards and the awakening of environmental protection awareness, the pressure of environmental protection has forced some traditional solvent-...

Claims

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Application Information

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IPC IPC(8): C09D151/08C09D7/20C08F283/00C08F220/18C08F212/08C08G18/66C08G18/67C08G18/48C08G18/36C08G18/34C08G18/32
CPCC08F283/008C08G18/3206C08G18/348C08G18/36C08G18/4825C08G18/4854C08G18/672C08G2350/00C09D7/20C09D151/08C08G18/6696C08G18/6692C08G18/6674C08F220/1804
Inventor 周超王琳慧单久航
Owner 吉林希尔工业新材料技术有限公司
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