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Preparation method and application of high-solid-content water-based polyurethane resin and coating thereof

A technology of water-based polyurethane and high solid content, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problem of no mention of high-solid content water-based polyurethane emulsion synthesis, difficulty in preparing high-solid content water-based polyurethane emulsion, and no specific disclosure of coatings Preparation technology and other issues, to achieve obvious environmental protection value, freeze-thaw resistance advantages, good fullness effect

Active Publication Date: 2017-05-31
JIANGSU ZHONGKE JINLONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is imminent to prepare high-solid content waterborne polyurethane coatings, but it is difficult to prepare high-solid content waterborne polyurethane emulsions by relying solely on carboxylic acid type hydrophilic chain extenders (such as dimethylol propionic acid, etc.)
Chinese patent CN 103626953 discloses a method for synthesizing a sulfonate-type water-based polyurethane emulsion, using self-made sulfonic acid-type polyester diol as a raw material and mixing it with other polyols to prepare a water-based polyurethane emulsion with a higher solid content. However, the preparation of the sulfonic acid type polyester diol is complex in operation, with little space for structural adjustment, large usage, and low cost performance.
Chinese patent CN102010650 discloses a water-based polyurethane coating resin prepared from polypropylene carbonate polyols, but what it discloses is only a general method for resin synthesis, and does not mention the synthesis of high-solid content water-based polyurethane emulsion, nor does it specifically Disclose its coating preparation process
Chinese patent CN103755911 discloses the preparation of an environment-friendly polypropylene carbonate water-based polyurethane coating. Its innovative point is to use organic bismuth as an environment-friendly catalyst and adopt a two-step method to synthesize a water-based polyurethane coating with good stability. It does not involve Synthesis of High Solids Aqueous Polyurethane Emulsions

Method used

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  • Preparation method and application of high-solid-content water-based polyurethane resin and coating thereof
  • Preparation method and application of high-solid-content water-based polyurethane resin and coating thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039]React 70g of polypropylene carbonate diol with a molecular weight of 2500 and 35g of isophorone diisocyanate at 90°C for 2 hours, add 7g of 1,4-butanediol, 1g of trimethylolpropane, and 70g of acetone, and add 0.02g of dibutyltin dilaurate, react at 60°C for 8 hours, cool down to 45°C, stir for 10 minutes, add 0.5g of A95, react for 30 minutes, add 40g of acetone, quickly add 160g of deionized water for high-speed emulsification, stir for 10 minutes Minutes; put the obtained product on a rotary evaporator, vacuum decompresses, removes solvent, and obtains a high solid content aqueous polyurethane emulsion based on polypropylene carbonate polyol.

[0040] 150g of the water-based polyurethane emulsion based on polypropylene carbonate polyol prepared above, 0.05g of leveling agent TEGO 410, 0.07g of thickener WT-105A, 1g of water-based color paste, 0.8g of ethylene glycol monobutyl ether, Add 0.02g of defoamer TEGOFoamex 825 and the rest of deionized water into the tank in ...

Embodiment 2

[0042] React 45g of polypropylene carbonate diol with a molecular weight of 2000 and 20g of toluene diisocyanate at 80°C for 2.5 hours, add 7g of 1,6-hexanediol, 1g of trimethylolpropane, 80g of acetone, and add 0.02g of dilaurel Acetate dibutyltin, react at 60°C for 5 hours, cool down to 45°C, stir for 10 minutes, add 0.6g APS, after reacting for 60 minutes, add 40g of acetone, quickly add 100g of deionized water for high-speed emulsification, and stir for 10 minutes; the obtained product On a rotary evaporator, the solvent was removed under vacuum to obtain a high solid content aqueous polyurethane emulsion based on polypropylene carbonate polyol.

[0043] 150g of the above-mentioned prepared polypropylene carbonate polyol-based aqueous polyurethane emulsion, 0.1g leveling agent BYK346, 0.05g thickener ACRYSOL TM Add RM 12W, 1g water-based color paste, 1g ethylene glycol monobutyl ether, 0.02g defoamer TEGFOamex 825 and the rest of deionized water into the tank in sequence, ...

Embodiment 3

[0045] 40g of polypropylene carbonate diol with a molecular weight of 2000 and 20g of polybutylene adipate diol with a molecular weight of 3000 were reacted with 35g of isophorone diisocyanate at 90°C for 2.5 hours, and 6g of diol was added Diethylene glycol, 1.5g trimethylolpropane, 90g acetone, add 0.02g dibutyltin dilaurate, react at 60°C for 5 hours, cool down to 45°C, stir for 10 minutes, add 0.5gA95, react for 30 minutes Afterwards, add 40g of acetone, quickly add 80g of deionized water for high-speed emulsification, and stir for 10 minutes; put the resulting product on a rotary evaporator, vacuum and decompress, and remove the solvent to obtain a high-solid-content aqueous solution based on polypropylene carbonate polyols. polyurethane emulsion.

[0046] The aqueous polyurethane emulsion based on polypropylene carbonate polyol of 150g above-mentioned preparation, 0.05g leveling agent 8030, 0.07g Thickener ACRYSOL TM RM 5000, 1g water-based color paste, 0.8g ethylene ...

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Abstract

The invention discloses a preparation method and application of high-solid-content water-based polyurethane resin and coating thereof. The preparation method comprises the following steps: reacting poly (propylene carbonate) polyols or a mixture of poly (propylene carbonate) polyols and other conventional polypolyols with isocyanate, a chain extender, a crosslinking agent, a catalyst and a sulfonic acid type hydrophilic chain extender, adding water to perform emulsification, and removing a solvent to obtain the high-solid-content water-based polyurethane resin; adding aids such as a leveling agent, a thickening agent, color paste, an environment-friendly cosolvent and a defoaming agent to obtain high-solid-content water-based polyurethane resin coating prepared from the poly(propylene carbonate)polyols. Film-forming and drying speed is high, plumpness is high, and high adhesive force, hardness, water resistance and solvent resistance are achieved.

Description

technical field [0001] The invention belongs to the field of water-based polyurethane coatings, in particular to the synthesis of high-solid-content water-based polyurethane emulsions with polypropylene carbonate polyol as an essential component and the preparation of water-based polyurethane coatings by mixing the water-based polyurethane emulsions with other additives and apply. Background technique [0002] At present, the resins used for coatings mainly include acrylic, alkyd, polyurethane and other resins, but most of them are solvent-based resins. The organic solvents in solvent-based coatings are flammable, explosive, and volatile, which will undoubtedly cause serious damage to the environment and people's health. With the increasingly stringent environmental regulations and the improvement of people's awareness of environmental protection, the pursuit of environmentally friendly products has become the general trend, and solvent-based products will gradually be repl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/32C08G18/42C08G18/44C08G18/48C09D175/04C09D175/06C09D175/08
CPCC08G18/3206C08G18/4238C08G18/44C08G18/4825C08G18/4854C08G18/6607C08G18/6611C08G18/664C08G18/6644C09D175/04C09D175/06C09D175/08
Inventor 徐玉华何程林徐坤徐玉俊
Owner JIANGSU ZHONGKE JINLONG CHEM
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