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Vegetable oil-based anionic type waterborne polyurethane emulsion as well as preparation method and application thereof

A water-based polyurethane, vegetable oil-based technology, used in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, applications, etc., can solve the problems of low conversion efficiency, unreported, high product cost, and improve the use value. , suitable for promotion and application, improve the effect of uniformity

Active Publication Date: 2018-08-31
江苏维特金属防腐科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are several problems in the current preparation method of converting vegetable oil into new polyols: 1. The use of a large amount of organic solvents does not meet the requirements of environmental protection; 2. The conversion efficiency is not high, resulting in high product costs and unacceptable by the market; 3. Conversion The use of petrochemical-based additives in the process leads to the preparation of polyols that are only partially bio-based, and the entire conversion process still relies on petrochemical resources
[0004] In response to the above problems, the inventors proposed a solvent-free and catalyst-free oxidation / ring-opening method, using ricinoleic acid to open the epoxy vegetable oil to prepare fully bio-based polyols, and finally prepared a series of properties from flexibility to rigidity Controllable polyurethane polymer materials, its mechanical properties are far superior to similar commercial vegetable oil-based and petroleum-based polyurethane materials on the market, but so far, the development of water-based polyurethane with such polyols has not been reported

Method used

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  • Vegetable oil-based anionic type waterborne polyurethane emulsion as well as preparation method and application thereof
  • Vegetable oil-based anionic type waterborne polyurethane emulsion as well as preparation method and application thereof
  • Vegetable oil-based anionic type waterborne polyurethane emulsion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Put olive oil-based polyol (OCP for short), IPDI, and DMPA in a double-necked round-bottomed flask at a molar ratio of 10:20:30, adjust the stirrer speed to 200r / min, and mechanically stir and mix at 40°C for 10 minutes Finally, add 0.3wt% dibutyltin dilaurate (DBTDL), stir at 75°C for 2h (if the viscosity of the solution increases, add 1-3mL methyl ethyl ketone (MEK) to the system), then cool to room temperature, add Triethylamine was neutralized for 30 minutes (the degree of neutralization was 50%), and the rotation speed was increased to 450r / min, and deionized water was added to emulsify for 2 hours, and finally the emulsion was transferred to a single-necked round-bottomed flask and rotary evaporated to remove MEK, and the solid content was obtained. It is 12-13% anionic water-based polyurethane emulsion.

Embodiment 2

[0028] Put rapeseed oil-based polyol (CaCP for short), IPDI, and DMBA in a double-necked round bottom flask at a molar ratio of 30:20:30, adjust the stirrer speed to 150r / min, and mechanically stir and mix at 70°C After 10 minutes, add 0.2wt% DBTDL, stir at 70°C for 2.5 hours (if the viscosity of the solution increases, add 1-3 mL of acetone to the system), then cool to room temperature, add triethylamine for neutralization for 30 minutes (neutralization degree is 80 %), increase the rotating speed to 450r / min, add deionized water to emulsify for 2h, and finally transfer the emulsion to a single-necked round-bottomed flask and remove acetone by rotary evaporation to obtain an anionic water-based polyurethane emulsion with a solid content of 10-12%.

Embodiment 3

[0030] Put grape seed oil-based polyol (GCP for short), IPDI, and DMPA in a double-necked round-bottomed flask at a molar ratio of 20:40:10, adjust the stirrer speed to 200r / min, and mechanically stir and mix at 50°C After 20min, add 0.3wt% DBTDL, stir at 85°C for 1.5h (if the viscosity of the solution increases, add 1-3mL MEK to the system), then cool to room temperature, add triethylamine for neutralization for 20min (neutralization degree is 50 %), increase the rotating speed to 450r / min, add deionized water to emulsify for 2h, and finally transfer the emulsion to a single-necked round-bottomed flask and remove MEK by rotary evaporation to obtain an anionic water-based polyurethane emulsion with a solid content of 12-13%.

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Abstract

The invention discloses vegetable oil-based anionic type waterborne polyurethane emulsion as well as a preparation method and application thereof, and belongs to the technical field of waterborne polyurethane. The preparation method comprises the following steps: mixing and dispersing vegetable oil-based polyhydric alcohol, diisocyanate and a chain extender uniformly according to the molar ratio of (10-30):(20-60):(10-30), adding a catalyst and performing reaction, cooling to room temperature after the reaction, adding a neutralizing agent and neutralizing under the neutralizing degree of 50 to 80 percent, adding water and emulsifying, and evaporating to remove a solvent to obtain the vegetable oil-based anionic type waterborne polyurethane emulsion. The waterborne polyurethane is preparedby adopting all biological based polyhydric alcohol and taking DMPA or DMBA as the chain extender; due to the special pre-crosslinked structure of the polyhydric alcohol, the crosslinking density ofthe polyurethane is increased and the mechanical property and the water tolerance of the material are improved; and by adoption of the preparation method, the success rate reaches 90 percent or more.

Description

technical field [0001] The invention belongs to the technical field of water-based polyurethane, and more specifically relates to a vegetable oil-based anionic water-based polyurethane emulsion and a preparation method and application thereof. Background technique [0002] Traditional solvent-based water-based polyurethane contains a large amount of organic solvents, which seriously affects the personal safety of builders and users. Most of its raw materials come from fossil resources such as petroleum. Since fossil resources such as petroleum are non-renewable resources and the refining process causes a large amount of Environmental pollution, so the preparation of polyurethane raw materials from petrochemical resources will cause the risk of resource depletion and environmental pollution, so the traditional solvent-based water-based polyurethane can no longer meet the needs of safety and environmental protection. With the enhancement of people's awareness of environmental ...

Claims

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Application Information

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IPC IPC(8): C08G18/36C08G18/34C09D175/14C09J175/14C09D11/102
CPCC08G18/348C08G18/36C09D11/102C09D175/14C09J175/14
Inventor 张超群朱爱萍
Owner 江苏维特金属防腐科技有限公司