The influence of the NCO/OH ratio and the 1,6-hexanediol/dimethylol propionic acid molar ratio on the properties of waterborne polyurethane dispersions based on 1,5-pentamethylene diisocyanate

2018 ◽  
Vol 13 (1) ◽  
pp. 80-89 ◽  
Author(s):  
Jiao Feng ◽  
Qiuhao Lu ◽  
Weimin Tan ◽  
Kequan Chen ◽  
Pingkai Ouyang
Keyword(s):  
Propionic Acid ◽  
Waterborne Polyurethane ◽  
Molar Ratio ◽  
Polyurethane Dispersions ◽  
Dimethylol Propionic Acid

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.

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 %.

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.

Design of self-dispersible charged-polymer building blocks for waterborne polyurethane dispersions

2018 ◽  
Vol 101 ◽  
pp. 324-331 ◽  
Author(s):  
I. Jiménez-Pardo ◽  
P. Sun ◽  
R.A.T.M. van Benthem ◽  
A.C.C. Esteves
Keyword(s):  
Waterborne Polyurethane ◽  
Building Blocks ◽  
Charged Polymer ◽  
Polyurethane Dispersions

Role of the interactions between carbonate groups on the phase separation and properties of waterborne polyurethane dispersions prepared with copolymers of polycarbonate diol

2015 ◽  
Vol 88 ◽  
pp. 199-211 ◽  
Author(s):  
José Antonio Jofre-Reche ◽  
Vanesa García-Pacios ◽  
Víctor Costa ◽  
Manuel Colera ◽  
José Miguel Martín-Martínez
Keyword(s):  
Phase Separation ◽  
Waterborne Polyurethane ◽  
Polycarbonate Diol ◽  
Polyurethane Dispersions
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