Waterborne polyurethane modified with poly(ethylene glycol) macromer for waterproof breathable coating

Jeong, Jin Hwan; Han, Young Chul; Yang, Jung Dug; Kwak, Dong Sup; Jeong, Han Mo

doi:10.1016/j.porgcoat.2016.10.004

Cited by 50 publications

(18 citation statements)

References 17 publications

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“…At present, there are many modification methods for waterborne coatings, such as organosiloxane modification [9], polyurethane modification [10], nanomaterials modification [11] and microcapsules modification [12]. In particular, it was found that adding microcapsules to waterborne coatings can improve the water resistance, wear resistance and the healing properties of coatings [13], which had attracted wide attention [14].…”

Section: Of 14mentioning

confidence: 99%

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

2019

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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.

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Section: Of 14mentioning

confidence: 99%

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

2019

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“…on water vapor adsorbed on the surface of PURH film and then diffuses through the film (37). Furthermore, increasing of WVTR can satisfy the requirement for a coating on outdoor garments to maintain a constant body temperature (14). If the PURH film based on higher water wetting tension and closer to neutral zeta potential, the resulting PURH will has higher WVTR value and exhibit more hydrophilicity (15).…”

Section: Tensile and Adhesive Properties Of Purhsmentioning

confidence: 99%

“…Although many studies have attempted to optimize and maximize the renewable resource polyols in PURHs as adhesive joints, little work had been done on expanding the functional applications of PURHs, such as their application in breathable clothing and biomedical materials (14,15). The aim of the present work is to develop PURHs based on biomass and CO 2 derived polyols, and to examine the effects of PURH structure on surface charge, wettability, moisture permeability, tensile strength, adhesive joint strength, and hydrolysis resistance properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and properties of biomass and carbon dioxide derived polyurethane reactive hot-melt adhesives

2019

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Polyurethane reactive hot-melt adhesives (PURHs) are frequently employed in industries; however, there is still a need to develop more sustainable and versatile methodologies to expand the functions and fabrication of these important materials. Renewable feedstock can give PURHs with new functions, and reduce environmental impact. This study focuses on synthesizing PURHs using polyols derived from biomass (plants) and greenhouse gas (CO 2 ) resources. These PURHs were characterized by multiple techniques, including solid-state 13 C nuclear magnetic resonance (NMR), a dynamic mechanical analysis (DMA), single-lap adhesive joints strength of stainless steel, and hydrolytic ageing. The PURH film based on biomass poly(tetramethylene ether) glycol (bio-PTMEG) exhibited better water vapor permeability, tensile strength, and adhesive joints properties than PURHs based on cashew nutshell liquid (CNSL) polyester diol and poly(propylene carbonate)-poly(propylene glycol) (PPC-PPG) copolymer diol. The polyols blend of bio-PTMEG with biomass and CO 2 based polycarbonate diols respectively provided PURHs films excellent hydrolysis resistance and adhesive strength on single-lap adhesively bonded stainless steel specimens. The work herein demonstrates that various renewable polyols can be employed in a sustainable fashion to optimize the structures and properties of PURHs for important applications.Abstract: Let F denote a eld and let V denote a vector space over F with nite positive a pair A, A * of diagonalizable F-linear maps on V, each of which acts on an eigenbasis irreducible tridiagonal fashion. Such a pair is called a Leonard pair. We consider the s there exists an automorphism of the endomorphism algebra of V that swaps A and A * . S is unique, and called the duality A ↔ A * . In the present paper we give a comprehens duality. In particular, we display an invertible F-linear map T on V such that the map X → A ↔ A * . We express T as a polynomial in A and A * . We describe how T acts on ag and 24 bases for V.

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“…Waterproof-breathable (WB) fabrics are materials that have waterproof, breathable, windproof, and warmth-generation properties [1][2][3]. They can be classified as high-density, coated, and laminated fabrics [4][5][6][7][8], according to the processing technology.…”

Section: Introductionmentioning

confidence: 99%

Hot-melt Adhesive Bonding of Polyurethane/Fluorinated Polyurethane/Alkylsilane-Functionalized Graphene Nanofibrous Fabrics with Enhanced Waterproofness, Breathability, and Mechanical Properties

et al. 2020

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Waterproof-breathable (WB) materials with outstanding waterproofness, breathability, and mechanical performance are critical in diverse consumer applications. Electrospun nanofibrous membranes with thin fiber diameters, small pore sizes, and high porosity have attracted significant attention in the WB fabric field. Hot-press treatment technology can induce the formation of inter-fiber fusion structures and hence improve the waterproofness and mechanical performance. By combining electrospinning and hot-press treatment technology, polyurethane/fluorinated polyurethane/thermoplastic polyurethane/alkylsilane-functionalized graphene (PU/FPU/TPU/FG) nanofiber WB fabric was fabricated. Subsequently, the morphologies, porous structure, hydrostatic pressure, water vapor transmission rate (WVTR), and stress–strain behavior of the nanofiber WB fabric were systematically investigated. The introduction of the hydrophobic FG sheet structure and the formation of the inter-fiber fusion structure greatly improved not only the waterproofness but also the mechanical performance of the nanofiber WB fabric. The optimized PU/FPU/TPU-50/FG-1.5 WB fabric exhibited an excellent comprehensive performance: a high hydrostatic pressure of 80.4 kPa, a modest WVTR of 7.6 kg m−2 d−1, and a robust tensile stress of 127.59 MPa, which could be used to achieve various applications. This work not only highlights the preparation of materials, but also provides a high-performance nanofiber WB fabric with huge potential application prospects in various fields.

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Waterborne polyurethane modified with poly(ethylene glycol) macromer for waterproof breathable coating

Cited by 50 publications

References 17 publications

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

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

Synthesis, characterization and properties of biomass and carbon dioxide derived polyurethane reactive hot-melt adhesives

Hot-melt Adhesive Bonding of Polyurethane/Fluorinated Polyurethane/Alkylsilane-Functionalized Graphene Nanofibrous Fabrics with Enhanced Waterproofness, Breathability, and Mechanical Properties

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