Synthesis and properties of a novel UV-curable waterborne hyperbranched polyurethane

Lin, Xufeng; Zhang, Shouyi; Qian, Jun

doi:10.1007/s11998-013-9520-4

Cited by 27 publications

(9 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is obvious that the average particle size initially increases and subsequently decreases as PA content increases. Although the average particle size could be controlled by emulsification condition such as stirring speed and dispersion temperature, it is mainly governed by the concentration of hydrophilic groups and segmented polymeric structure . In this work, the effect of different mass ratio (PA/PU) on particle size was investigated.…”

Section: Resultsmentioning

confidence: 99%

“…Although the average particle size could be controlled by emulsification condition such as stirring speed and dispersion temperature, it is mainly governed by the concentration of hydrophilic groups and segmented polymeric structure. 28,29 In this work, the effect of different mass ratio (PA/PU) on particle size was investigated. The particle sizes of PUA-0, PUA-5, PUA-20, PUA-30, and PA are 70, 85, 115, 77, and 59 nm, respectively.…”

Section: Particle Size Distribution and Storage Stability Of Pua Emulmentioning

confidence: 99%

See 1 more Smart Citation

Aqueous PUA emulsion prepared by dispersing polyurethane prepolymer in polyacrylate emulsion

Yuan

Wang

Cui

et al. 2015

J of Applied Polymer Sci

View full text Add to dashboard Cite

Waterborne polyurethane/polyacrylate (PUA) emulsions were prepared by dispersing polyurethane (PU) prepolymer in polyacrylate (PA) emulsion; therefore, the PU particles formed in the presence of PA nanoparticles. The particle size and its distribution of the composite PUA emulsion were determined by dynamic light scattering. The result shows that the average particle size increases initially and then decreases with increasing PA content, which is confirmed by transmission electron microscope characterization. The surface properties of PUA films were analyzed by water contact angle and atomic force microscope topography. It indicates that the water contact angle and the average roughness of the composite PUA films are larger than those of the PU film. Meanwhile, mechanical properties test, scanning electron microscopy, and thermogravimetric analyses disclose that the PUA films are characterized by enhanced tensile strength, rough fractured surface, and good thermal stability. The preparation method proposed in this article is an effective and convenient way to manufacture composite PUA emulsion. The composite PUA emulsion can be potentially used in coatings.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Particle Size Distribution and Storage Stability Of Pua Emulmentioning

confidence: 99%

Aqueous PUA emulsion prepared by dispersing polyurethane prepolymer in polyacrylate emulsion

Yuan

Wang

Cui

et al. 2015

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The most important feature of waterborne coatings is that they do not contain volatile organic compounds [3] and air pollutants, so they are widely used in various fields, such as woodwork processing, in interior decoration materials, housing construction, automobile manufacturing, in aircraft carriers, etc. [4,5], and have broad market application prospects. However, due to the low hardness, non-wear resistance and insufficient toughness of the waterborne coating, accidental damage and cracks often occur during its service life, which limits its practical application [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Urea-Formaldehyde-Coated Epoxy Microcapsule Modification on Gloss, Toughness and Chromatic Distortion of Acrylic Copolymers Waterborne Coating

2019

View full text Add to dashboard Cite

The modification experiment of waterborne coating was carried out by adding microcapsules. The wall material of the microcapsule was urea-formaldehyde resin and the core material of the microcapsule was epoxy resin. Core material can improve the toughness of the coating and prevent the cracking of the coating. The influences of different contents of microcapsules and the order of adding microcapsules in the coating process on the properties of gloss, color difference and toughness were studied. The results showed that the gloss of the waterborne coating decreased with the increase of microcapsule content. The color difference of coating increased first and then decreased, and when the microcapsule content was 8.0%, the color difference was the largest. The toughness of the coatings also increased first and then decreased. When the content of the microcapsule was 10.0%, the toughness of the coating was significantly enhanced. When the microcapsules with a content of 10.0% were added to the waterborne coating, under the same process, the coating gloss of microcapsules added to the primer was relatively high, and the coating gloss was the highest when the coating process was three-layer primer and two-layer topcoat. The microcapsule had little effect on the color difference of coating in different coating processes. When the coating process was three-layer primer and three-layer topcoat, the coating toughness was the best when microcapsules were added to the topcoats. This study provides a basis for industrial application of waterborne coatings to enhance their toughness.

show abstract

“…Most reported literatures were focused on synthesis and characterization of novel BPUs with highly branched polyols . However, the highly reactive NCO group was not designed as terminal group to further improve the adhesive strength between polyurethanes and substrates.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of blocked and branched waterborne polyurethanes for pigment printing applications

Mao

Qiang

Yang

et al. 2015

J of Applied Polymer Sci

View full text Add to dashboard Cite

A series of blocked and branched waterborne polyurethanes (BBPUs) have been successfully synthesized and applied in pigment printing of cellulosic substrate. The branched structure was based on an "A 2 1 CB 2 " approach with diisocyanate prepolymer and diethanol amine. The terminal isocyanate groups were blocked by sodium bisulfite to lower curing temperature and improve the color fastness. The prepolymerization and chain extending could be considered as the end at 708C after 90 min and at 808C after another 90 min, respectively. It was suitable for sodium bisulfite to block isocyanate groups at 08C-58C for 40 min. The microphase separation of BBPU based on the longest polyethylene glycol (PEG) soft segment appeared. Both curing rate and pencil hardness of BBPU films distinctly reduced as the molecular mass of PEG soft segment ascended. The moisture rate increased from 18.1% to 49.2% with increasing the molecular weight of PEG, indicating that water resistance of the film became poor. Excellent acid and alkali resistances of the BBPU films were obtained. Color fastness to washing, rubbing, and light of the printed cotton fabrics was remarkably enhanced as the BBPU amount ascended to 10% which were cured at 858C for 6 min.

show abstract

Synthesis and properties of a novel UV-curable waterborne hyperbranched polyurethane

Cited by 27 publications

References 24 publications

Aqueous PUA emulsion prepared by dispersing polyurethane prepolymer in polyacrylate emulsion

Aqueous PUA emulsion prepared by dispersing polyurethane prepolymer in polyacrylate emulsion

Effect of Urea-Formaldehyde-Coated Epoxy Microcapsule Modification on Gloss, Toughness and Chromatic Distortion of Acrylic Copolymers Waterborne Coating

Synthesis of blocked and branched waterborne polyurethanes for pigment printing applications

Contact Info

Product

Resources

About