Method for preparing a waterborne poly(urethane acrylate)/nano-titanium dioxide hybrid material

A nano-titanium dioxide and water-based polyurethane technology is applied in the field of preparation of polyurethane emulsion modification. The effect of sufficient raw material source and simple preparation process

Inactive Publication Date: 2010-12-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no research on its storage stability and water resistance, so it is difficult to ensure the application and promotion of ma

Method used

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  • Method for preparing a waterborne poly(urethane acrylate)/nano-titanium dioxide hybrid material

Examples

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Embodiment 1

[0014] (1) In a container equipped with a stirring device, add dehydrated ethanol, whose consumption accounts for 56% of the total substance by volume, and a certain amount of n-butyl titanate (TBT), hydrochloric acid, distilled water and dehydrated alcohol ( The volume ratio is 10:2:1:10) the mixed solution was added into the container, and stirred at room temperature for 1 hour to obtain a homogeneous clear solution, that is, TBT sol.

[0015] Add a certain amount of 20g of N-220 and 5g of DMPA into a 500ML four-necked bottle equipped with a stirrer, reflux condenser, thermometer and feeding device, use NMP as a solvent, raise the temperature of the system to 70°C, add 15g of IPDI, drop Add 0.5g of T-12 as a catalyst, raise the temperature of the system to 90°C, react for 6 hours (if the viscosity of the system is too high, add a certain amount of acetone), cool down to 50°C, add 8g of HEMA, keep warm for 5 hours, then lower the temperature To 40°C, add triethylamine, react ...

Embodiment 2

[0017] (1) In a container equipped with a stirring device, add dehydrated ethanol, whose consumption accounts for 56% of the total substance by volume, and a certain amount of n-butyl titanate (TBT), hydrochloric acid, distilled water and dehydrated alcohol ( The volume ratio is 10:2:1:10) the mixed solution was added into the container, and stirred at room temperature for 1 hour to obtain a homogeneous clear solution, that is, TBT sol.

[0018] Add 10g of N-220 and 5g of DMPA into a 500ML four-necked bottle equipped with a stirrer, reflux condenser, thermometer and feeding device, use NMP as a solvent, raise the temperature of the system to 50°C, add 15g of MDI, and dropwise add 0.3g of T -12 is the catalyst, raise the temperature of the system to 80-85°C, react for 3 hours (if the system viscosity is too high, add a certain amount of acetone), cool down to 60°C, add 6g of HEMA, keep warm for 6 hours, then cool down to 50°C, add triethylamine, react for 30min, add 5g of ethyl m...

Embodiment 3

[0020] (1) In a container equipped with a stirring device, add dehydrated ethanol, whose consumption accounts for 56% of the total substance by volume, and a certain amount of n-butyl titanate (TBT), hydrochloric acid, distilled water and dehydrated alcohol ( The volume ratio is 10:2:1:10) the mixed solution was added into the container, and stirred at room temperature for 1 hour to obtain a homogeneous clear solution, that is, TBT sol.

[0021] Add a certain amount of 10g of GE-210 and 1.7g of DMPA into a 500ML four-necked bottle equipped with a stirrer, reflux condenser, thermometer and feeding device, use NMP as a solvent, raise the temperature of the system to 60°C, add 10g of IPDI, Add 0.1g T-12 as a catalyst dropwise, raise the temperature of the system to 80-85°C, react for 4 hours (if the system viscosity is too high, add a certain amount of acetone), cool down to 60°C, add 5.75g of HEMA, keep warm and continue the reaction After 5 hours, cool down to 40°C, add triethy...

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Abstract

The invention provides a method for preparing a waterborne poly(urethane acrylate)/nano-titanium dioxide hybrid material. The method comprises the following steps: (1) firstly, preparing TBT (tetrabutyl titanate) sol; (2) adding mono-polyol and isocyanate as raw materials to a container, adding a hydrophilic chain extender, increasing the temperature of the reaction system to 30 to 80 DEG C and further adding catalysts in the presence of NMP (N-methyl pyrrolidone) as a solvent; and (3) adding triethylamine as a salt-forming agent, reacting for 10min to 60min, and dispersing with water in the presence of ethylenediamine as a chain extender to obtain the waterborne polyurethane emulsion; adding a small amount of gamma-glycidoxy-propyl-tri-methoxy-silane, stirring for 10min to 90min, adding the TBT sol to the reaction system, further dropwise adding a small amount of hydrochloric acid, and keeping stirring for 12h to 48h to obtain the waterborne poly(urethane acrylate)/nano-titanium dioxide hybrid material. The hybrid material of the invention has the advantage that the weather resistance, mechanical properties, coating transparency and other properties of the hybrid material are greatly increased.

Description

Background technique [0001] This patent relates to a preparation technology of polyurethane emulsion modification, especially a preparation method of water-based polyurethane-acrylate / nano-titanium dioxide hybrid material. The waterborne polyurethane-acrylate / nano-titanium dioxide hybrid material prepared by the sol-gel method has the advantages of good storage stability, strong UV resistance, good weather resistance, water resistance, and good mechanical properties. Background technique [0002] Polyurethane is widely used in coatings, finishing agents, elastomers, Printing and dyeing auxiliaries, adhesives and other fields. However, there are still some problems in its actual use. For example, with the increasingly stringent environmental protection regulations and the gradual enhancement of people's environmental awareness, the environmentally friendly water-based polyurethane with water as the dispersion medium has become the direction of polyurethane resin development ...

Claims

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Application Information

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IPC IPC(8): C08L51/08C08K3/22C08F290/06C08F220/14C08F220/18C08G18/67
Inventor 邱凤仙吴冬梅许和平杨冬亚
Owner JIANGSU UNIV
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