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

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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