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Solvent-free polyurethane dispersion with good compatibility with butyronitrile 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: 2021-05-11
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 butyronitrile latex and emulsion for glove coating
  • Solvent-free polyurethane dispersion with good compatibility with butyronitrile latex and emulsion for glove coating
  • Solvent-free polyurethane dispersion with good compatibility with butyronitrile latex and emulsion for glove coating

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] The preparation method of solvent-free polyurethane dispersion:

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

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

Embodiment 1

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

[0059] Take 100 parts of 1# prepolymer, 1 part of triethanolamine dodecylbenzenesulfonate, 2.47 parts of hydroxyethylethylenediamine and 600 parts of deionized water, stir at 4000 rpm for 10 minutes at high speed, then reduce to 300 rpm and stir for 20 minutes. A 1# solvent-free polyurethane dispersion was prepared, with an average particle size of 370 μm, a pH of 7...

Embodiment 2

[0061] Prepare a 1L three-neck flask, install a stirrer, a thermometer, nitrogen protection and a temperature control device. Add 68.6 parts of polyoxyethylene / oxypropylene ether polyols (molecular weight 2000, functionality 2) and 2 parts of polyethylene glycol monomethyl ether (molecular weight 1000, functionality 0.9) into the flask after drying, mix well, and then Add 29.4 parts of 4,4'-diphenylmethane diisocyanate into the reaction flask, slowly raise the temperature to 90°C, and react for 2 hours to obtain 2# prepolymer with an NCO% of 7%.

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

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PUM

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Abstract

The invention discloses a solvent-free polyurethane dispersion with good compatibility with butyronitrile latex. The particle size of the solvent-free polyurethane dispersion is 100-1500 microns, and the pH value of the solvent-free polyurethane dispersion is 7-8. The solvent-free polyurethane dispersion prepared by the invention does not use any organic solvent, has the characteristics of greenness and environmental protection, can be directly mixed with butyronitrile latex and tap water, does not generate instability and agglomeration phenomena, has better compatibility, and is convenient for factory processing. The invention also discloses an emulsion for a glove coating prepared from the solvent-free polyurethane dispersion. The emulsion for the glove coating is good in film forming effect and impermeable, and gloves prepared from the emulsion 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 a glove coating emulsion prepared by using the solvent-free polyurethane dispersion. Background technique [0002] In daily work and life, gloves are an important protective product 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 are lined with knitted gloves and coated with functional polymers on the outer layer, which can not only maintain the wearing comfort of the fabric, but also use the characteristics of the outer material to have better grip. Grip strength, puncture resistance and other advantages. Currently commonly used fabric materials are cotton, polyester fiber, nylon, aramid, Dyneema and so on. Commonly used coat...

Claims

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Application Information

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Patent Type & Authority Applications(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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