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Solvent-free polyurethane dispersion with good compatibility with nitrile latex and emulsion for glove coating

A polyurethane dispersion and solvent-free technology, applied in polyurea/polyurethane coatings, coatings, conjugated diene coatings, etc., can solve the problems of PUD film-forming performance and other problems, and achieve easy finger movement, viscosity and particle size Moderate range, taking into account the effect of flexibility and strength

Active Publication Date: 2022-07-26
南京优迪新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Third, the influence of additives on the film-forming properties of PUD

Method used

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  • Solvent-free polyurethane dispersion with good compatibility with nitrile latex and emulsion for glove coating
  • Solvent-free polyurethane dispersion with good compatibility with nitrile latex and emulsion for glove coating
  • Solvent-free polyurethane dispersion with good compatibility with nitrile latex and emulsion for glove coating

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] Preparation method of solvent-free polyurethane dispersion:

[0055] (1) Dry the macromolecular polyol and the small molecular polyol, mix the dried macromolecular polyol and the small molecular polyol with the polyisocyanate, slowly raise the temperature of the system to 80-90°C, and the reaction time is 2-5 hours to obtain a prepolymer.

[0056] (2) Mix the prepolymer, surfactant, chain extender and deionized water, stir at high speed for 5 to 10 minutes at 4000 to 6000 rpm, then reduce the speed to 300 to 600 rpm, and continue to stir for 10 to 30 minutes. Solvent-borne polyurethane dispersions.

Embodiment 1

[0058] Prepare a 1L three-necked flask and install a stirrer, thermometer, nitrogen protection and temperature control device. After drying, 56.2 parts of polyoxypropylene ether polyol (molecular weight 2000, functionality 2), 21.6 parts of polyoxypropylene ether polyol (molecular weight 3000, functionality 2), 1.3 parts polyethylene glycol monomethyl ether (molecular weight 1000 , functionality 0.9) was added to the flask, mixed evenly, then 20.9 parts of 4,4'-diphenylmethane diisocyanate was added to the reaction flask, and the temperature was slowly raised to 80 ° C, the reaction time was 5h, to obtain 1# prepolymer, NCO % is 4%.

[0059] Take 100 parts of 1# prepolymer, 1 part of dodecylbenzenesulfonic acid triethanolamine salt, 2.47 parts of hydroxyethylethylenediamine and 600 parts of deionized water, stir at high speed at 4000rpm for 10min, and then reduce to 300rpm and stir for 20min. The 1# solvent-free polyurethane dispersion was prepared, the average particle size ...

Embodiment 2

[0061] Prepare a 1L three-necked flask and install a stirrer, thermometer, nitrogen protection and temperature control device. Add 68.6 parts of dried polyethylene oxide / propylene oxide ether polyol (molecular weight 2000, functionality 2) and 2 parts polyethylene glycol monomethyl ether (molecular weight 1000, functionality 0.9) into the flask, mix well, and then add 29.4 parts of 4,4'-diphenylmethane diisocyanate were added to the reaction flask, the temperature was slowly raised to 90° C., and the reaction time was 2 h to obtain a 2# prepolymer with an NCO% of 7%.

[0062] Take 100 parts of 2# prepolymer, 3 parts of dodecylbenzenesulfonic acid triethanolamine salt, 1.8 parts of hydroxyethylethylenediamine and 302 parts of deionized water, stir at high speed at 6000 rpm for 5 minutes, then reduce to 600 rpm and stir for 20 minutes. 2# solvent-free polyurethane dispersion was prepared, with an average particle size of 100 μm, a pH of 7.13 and a solid content of 25%.

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Abstract

The present application discloses a solvent-free polyurethane dispersion with good compatibility with nitrile latex. The solvent-free polyurethane dispersion has a particle size of 100-1500 microns and a pH of 7-8. The solvent-free polyurethane dispersion prepared in the present application does not use any organic solvent, and has the characteristics of green environmental protection. It can be directly mixed with nitrile latex and tap water without destabilizing agglomeration, and has good compatibility and convenience. Factory processing. The present application also discloses an emulsion for glove coating prepared by using the above solvent-free polyurethane dispersion. The emulsion for glove coating has a good film-forming effect, is impermeable, and the prepared gloves are soft and comfortable to wear.

Description

technical field [0001] The application belongs to the field of polymer materials, and relates to a solvent-free polyurethane dispersion with good compatibility with nitrile latex, and an emulsion for glove coating prepared by using the solvent-free polyurethane dispersion. Background technique [0002] In daily work and life, gloves are an important protective equipment that can protect hands from injury. Especially in factories, workers need good grip and hand protection to improve work efficiency. The commonly used protective gloves in the industry are knitted lined gloves, which use knitted gloves as the inner lining and coat the outer layer with functional polymers, which can not only maintain the wearing comfort of the fabric, but also use the characteristics of the outer layer material to have a better grip. Grip strength, puncture resistance and other advantages. At present, the commonly used fabric materials are cotton, polyester fiber, nylon, aramid, Dyneema and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/12C08G18/28C08G18/48C08G18/66C08G18/32C09D175/08C09D109/04
CPCC08G18/12C08G18/6688C08G18/4825C08G18/4837C08G18/283C08G18/4854C08G18/4808C09D175/08C08G18/3271C08G18/3228C08G18/3848C08L9/04
Inventor 苗军亮甘小兵
Owner 南京优迪新材料科技有限公司
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