Preparation of WPU Wet-Rubbing Fastness Improver

2015 ◽  
Vol 1094 ◽  
pp. 109-112 ◽  
Author(s):  
Shu Ling Cui
Keyword(s):  
Polyethylene Glycol ◽  
Propionic Acid ◽  
Waterborne Polyurethane ◽  
Diphenylmethane Diisocyanate ◽  
Optimal Process ◽  
Influence Of Temperature ◽  
Temperature Time ◽  
Dimethylol Propionic Acid

A wet-rubbing fastness improver was prepared by two steps: (1) synthesis of waterborne polyurethane (WPU) through the reaction of diphenylmethane diisocyanate (MDI), polyethylene glycol (PEG), dimethylol propionic acid (DMPA), and diethylenetriamine; (2) modification of WPU by reaction with epichlorohydrin. Influence of temperature, time, concentration and ratio of monomers on the preparation was studied. The optimal process for WPU synthesis is as follows: temperature 100°C, time 3h, diethylenetriamine 1.5 % and DMPA7% (on weight of monomers). The modification reaction can be proceeded at temperature 100°C for 2h with epichlorohydrin 2.7 %.

Influence of the 2,2-Dimethylol Propionic Acid Content on the Structure-Properties of Waterborne Polyurethane

2012 ◽  
Vol 476-478 ◽  
pp. 2116-2121 ◽  
Author(s):  
Zheng Xiang Wang ◽  
Jian Long Wang ◽  
Li Zheng Gu
Keyword(s):  
Propionic Acid ◽  
Waterborne Polyurethane ◽  
Peel Strength ◽  
Scanning Calorimetry ◽  
Elongation At Break ◽  
Waterborne Polyurethanes ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Lower Elongation ◽  
Dimethylol Propionic Acid ◽  
Structure Properties

Abstract. Series waterborne polyurethane (WPU) dispersions with different 2,2-dimethylol propionic acid (DMPA) content were synthesized by the prepolymer method. Different configurations in the waterborne polyurethanes were obtained by varying the DMPA content. The structure-properties of the WPU dispersions were characterized by Fourier transformed infrared spectroscopy, Thermogravimetric analysis, differential scanning calorimetry, Zetasizer nano etc. The results indicated that the amount of urethane and urea groups (hard segment) increased in the structure of WPU chains with the increasing content of DMPA. In the meantime, the degree of micro-phase separation increased. On the other hand, as the content of DMPA increased, the particle size, the thermal stability and T-peel strength decreased. Moreover, the increased content of DMPA resulted in higher tensile strength and hardness, but lower elongation at break.

Study on Synthesis of Environmental Waterborne Polyurethane

2012 ◽  
Vol 550-553 ◽  
pp. 653-656 ◽  
Author(s):  
Lin Lu Zheng ◽  
Hong Lu Xie ◽  
Yan Ling Wu ◽  
Jian Hua Huang
Keyword(s):  
Vapor Pressure ◽  
Propionic Acid ◽  
Saturated Vapor Pressure ◽  
Saturated Vapor ◽  
Waterborne Polyurethane ◽  
Diphenylmethane Diisocyanate ◽  
Factors Influencing ◽  
Low Toxicity

A MDI-based waterborne polyurethane emulsion(PU) was synthesized by the reaction of polyester glycol(PBA), di-methylol propionic acid(DMPA) with 4,4`-diphenylmethane diisocyanate (MDI) instead of toluene di-isocyanatotoluene(TDI) because of its low toxicity, low saturated vapor pressure. The factors influencing the properties of waterborne polyurethane emulsion were discussed. It was observed that the appearance and properties of the PU emulsion were nearly related with the ratio of NCO/OH(R) and the amount of DMPA.

Preparation and properties of emulsifier-/NMP-free crosslinkable waterborne polyurethane-acrylic hybrid emulsions for footwear adhesives (II) – effect of dimethylol propionic acid (DMPA)/pentaerylthritol triacrylate (PETA) content

e-Polymers ◽  
2016 ◽  
Vol 16 (3) ◽  
pp. 189-197 ◽  
Author(s):  
Jung-Mi Cheon ◽  
Seul-Gi Lee ◽  
Jae-Hwan Chun ◽  
Dong-Jin Lee ◽  
Young-Hee Lee ◽  
...  
Keyword(s):  
Propionic Acid ◽  
Adhesive Strength ◽  
High Performance ◽  
Waterborne Polyurethane ◽  
Solid Content ◽  
Adhesive Properties ◽  
Molar Ratios ◽  
Monomer Content ◽  
The Stability ◽  
Dimethylol Propionic Acid

AbstractStable emulsions (solid content: 38%) of emulsifier-/N-methylpyrrolidone (NMP)-free crosslinkable waterborne polyurethane-acrylic hybrids with a fixed acrylic monomer content (20 wt.%) and different molar ratios (mole%) of dimethylol propionic acid (DMPA)/crosslinkable pentaerythritol triacrylate (PETA)(17/23, 22/17, 27/11, 32/5) were successfully prepared. This study examined the effect of mole% of DMPA/PETA on the stability and viscosity of hybrid emulsions, the tensile properties/dynamic mechanical thermal properties of hybrid film samples and the adhesive strengths of formulated adhesives for footwear at both dry and wet states. The tensile strength/modulus, storage modulus and Tgs increased with increasing PETA content. The adhesive strength at dry state increased with increasing DMPA content up to 27 mole%, and then decreased a little. However, the adhesive strength at wet state decreased with increasing DMPA content. The optimum DMPA/PETA contents were found to be 27/11 mole% to achieve high performance adhesive properties.

Synthesis and Property of Water Borne Polyurethane/Modified Nano-ZnO Composites Packaging Membranes

2013 ◽  
Vol 469 ◽  
pp. 167-170 ◽  
Author(s):  
Xin Li ◽  
Shu Cai Li ◽  
Li Qiang Huang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Mechanical Testing ◽  
Propionic Acid ◽  
Nano Zno ◽  
Phase Property ◽  
Dimethylol Propionic Acid ◽  
Scanning Electron ◽  
Water Borne

Water borne polyurethane /modified nano-ZnO composites packaging membranes were synthesized from modified nano-ZnO, polybutyleneadipate glycol (PBA), polycaprolactone (PCL) isophorne diisocyanate (IPDI), dimethylol propionic acid (DMPA), ethylenediamine(EDA) by self-emulsified method. The phase property, mechanical, antibacterial and anti-ultraviolet properties of the composites packaging membranes influenced by the modified nano-ZnO content were studied by scanning electron microscopy (SEM), mechanical testing, and antibacterial testing. And the relative results were analysed.

Influence of Temperature-Time Mode of Crystallization on Electrophysical Characteristics of the Polypropylene/Magnetite Nanocomposite

2019 ◽  
Vol 201 (1) ◽  
pp. 218-223
Author(s):  
M. A. Ramazanov ◽  
H. A. Shirinova ◽  
F. V. Hajiyeva ◽  
A. Kh. Karimova
Keyword(s):  
Magnetic Field ◽  
Dielectric Permittivity ◽  
Cooling Rate ◽  
Polymer Nanocomposites ◽  
Hot Pressing ◽  
Nanocomposite Materials ◽  
Negative Magnetoresistance ◽  
Electrophysical Properties ◽  
Influence Of Temperature ◽  
Temperature Time

In the present study, the influence of the temperature–time mode of crystallization (TTC) on the electrophysical properties of polymer-based PP + Fe3O4 nanocomposite materials was investigated. Also, the effect of the temperature-time mode of crystallization of nanocomposites on the negative magnetoresistance (NMR) effect that observed in this material was investigated. It was found that dielectric permittivity of polymer nanocomposites rises with increasing of cooling rate. The cooling rate of nanocomposites after hot-pressing also affects the NMR effect of these materials. The conductivity of the material under the influence of magnetic field improves with increasing of its cooling rate, which leads to increasing of NMR effect.

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