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UV-postcured modified aqueous polycarbonate polyurethane emulsion and preparation method thereof

A technology of polyurethane emulsion and polycarbonate, which is applied in the field of coatings and can solve the problems of high cost and high cost of coatings

Inactive Publication Date: 2018-07-10
广东博海化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Considering the cost of synthetic materials, in the same composition, the price of polycarbonate diol is 100 yuan / kg, and the price of poly IPDI is 200 yuan / kg. IPDI is the main raw material, although it has better performance in some aspects. , but it will cause high paint cost
High cost is one of the important reasons that limit its wide application in the coatings industry, so high cost is another shortcoming

Method used

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  • UV-postcured modified aqueous polycarbonate polyurethane emulsion and preparation method thereof
  • UV-postcured modified aqueous polycarbonate polyurethane emulsion and preparation method thereof
  • UV-postcured modified aqueous polycarbonate polyurethane emulsion and preparation method thereof

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Embodiment Construction

[0027] The present invention will be further described in conjunction with Embodiment 1~5:

[0028] A kind of preparation method of UV post-curing modified aqueous polycarbonate polyurethane emulsion, comprises the steps:

[0029] 1) Add the formulated amount of PCDL into a dry four-neck flask equipped with a stirrer, condenser and thermometer. After the temperature rises to 60°C, slowly add the formulated amount of TDI, continue to stir and heat up to 80°C for 2 hours, then cool down to 60°C and add After DMPA and TMP, heat up to 75°C to react for 1 hour, cool down to 60°C, add CHDM, 4 drops of stannous octoate catalyst, adjust viscosity with acetone, keep warm for reaction, wait until the NCO content reaches 4.81%, add the formula amount of acrylic acid hydroxyl Ethyl ester capping reaction for 2h, cooling to room temperature and adding acetone to reduce viscosity;

[0030] 2) Transfer the obtained prepolymer to an emulsification tank, add TEA to neutralize for 5 minutes un...

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Abstract

The invention discloses a UV-postcured modified aqueous polycarbonate polyurethane emulsion and a preparation method thereof. Raw materials for preparing the emulsion comprise, by weight, 8.0-9.5% ofPCDL, 1.5-2.0% of DMPA, 2.0-3.0% of CHDM, 1.0-2.0% of TEA, 9.5-11.5% of TDI, 0.2-1.0% of TMP, 1.8-10% of a diluent, and 60-80% of water. The crosslinking degree of the UV-postcured modified aqueous polycarbonate polyurethane emulsion is further improved while the emulsion is dried and forms a film, so the polyurethane structure is closely combined.

Description

【Technical field】 [0001] The invention relates to the technical field of coatings, in particular to a UV post-curing modified water-based polycarbonate polyurethane emulsion and a preparation method thereof. 【Background technique】 [0002] Polycarbonate waterborne polyurethane refers to the use of Waterborne polyurethane prepared from dibasic or polyhydric alcohols. Compared with polyether-type WUP and polyester-type WPU, polycarbonate-type WPU not only has excellent mechanical properties, but also has advantages in water resistance and heat resistance. Polyether-type water-based polyurethane, because its molecular structure contains (- O-) ether bond, carboxylate and other groups with better hydrophilicity, so polyether-type waterborne polyurethane has better emulsion stability, hydrophilicity, etc., otherwise the water resistance is poor, and esters The water resistance of the structure (R-COO-R) is better, so the water resistance of the film of polycarbonate water-base...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/67C08G18/66C08G18/44C08G18/34C08G18/32
CPCC08G18/3206C08G18/348C08G18/44C08G18/672C08G18/7614C08G18/0823C08G18/6659C08G18/664
Inventor 王新闻卿宁褚书宝褚波
Owner 广东博海化工科技有限公司
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