Effect of acid groups in hydroxyl functional resins on the properties of polyester-urethane powder coatings

Wu, Bin; Padaki, S.; Maetens, D.

doi:10.1007/bf02698471

Cited by 6 publications

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“…During the same interval of time, a sharp increase in coating capacitance is observed for all the coatings. This observation is quite in agreement with that made by Brasher and Nurse [2]. According to them, the sharp increase in C c is due to the re-orientation in the mode of distribution of water within the coating film.…”

Section: Eis Studysupporting

confidence: 93%

“…Therefore, designing an effective barrier coating to the steel rebar requires not only a knowledge of corrosion principles, but also of coating formulations as well. By a careful consideration on chemical resistance and mechanical properties, the following formulations based on epoxy silicone-polyamide [1], polyester polyol aromatic isocyanate [2] and acrylic polyol aromatic isocyanate [3] have been selected for rebar coatings. To evaluate the performance of these coatings, Electrochemical Impedance Spectrosocpy (EIS) was adopted in addition to chemical resistance tests and mechanical tests such as flexibility, impact, scratch hardness, vickers hardness, pencil hardness and taber abrasion resistance tests.…”

Section: Introductionmentioning

confidence: 99%

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Selvaraj

Bhuvaneshwari

2009

Port. Electrochim. Acta

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Corrosion of the embedded steel reinforcements (rebars) in concrete is the major reason for the deterioration of concrete structures. One of the effective methods of overcoming this serious problem is by applying a barrier coating to the steel rebars. The barrier coating on steel rebars isolates the steel from the immediate environment and also acts as an insulator to prevent the corrosion. Four different coatings have been formulated using resins such as epoxy silicone-polyamide, polyester polyol-aromatic isocyanate, and acrylic polyol-aromatic isocyanate. These formulations consist of either ordinary portland cement (OPC) or fly ash as extender (pozzolanic pigments) and titanium dioxide (TiO 2) and zinc phosphate as the main pigment. All these coatings have been studied for their barrier protection and other mechanical properties. Evaluation study of these coatings include Electrochemical Impedance Spectroscopy (EIS), chemical resistance tests and mechanical tests such as flexibility, impact resistance, adhesion, hardness and abrasion resistance, etc., as per ASTM standards and the results are discussed elaborately. It has been concluded from this study that the epoxy siliconepolyamide resin based coating formulation shows good mechanical properties in addition to the barrier protection to the steel rebars from the corrosive environments.

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Section: Eis Studysupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Selvaraj

Bhuvaneshwari

2009

Port. Electrochim. Acta

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Water‐based inorganic/polymer hybrid particles prepared via a multiple miniemulsion process

Nabih

Landfester

Taden

2011

J. Polym. Sci. A Polym. Chem.

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A universal method for the synthesis of water‐based inorganic–polymer hybrid particles was developed in which no organic solvent is required. To demonstrate the versatility of this process, zinc phosphate, calcium carbonate, and barium sulfate were chosen as different pigment examples which additionally can be utilized for functional coating applications. Furthermore, a complex polymeric composition based on epoxy–acrylic–styrene was chosen to illustrate the versatility from a soft matter point of view. The overall synthesis process was carried out by coemulsification of two inverse miniemulsions, containing two precursors, surrounded with a polymerizable continuous phase. This was then transferred to a direct miniemulsion by addition to a surfactant solution and subsequent homogenization followed by radical polymerization of the vinylic monomers. To our knowledge, this is the first work where a polymerizable continuous phase has been used in an inverse miniemulsion formation followed by transfer to a direct miniemulsion, followed by polymerization, so that the result is a water‐based dispersion. The resultant dispersion was characterized by dynamic light scattering; the particles were investigated via transmission electron microscopy with in situ determination of crystallinity using electron diffraction. Elemental analysis was also performed for the particles and the polymerized miniemulsions using X‐ray fluorescence and inductively coupled plasma‐optical emission spectroscopy, respectively. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011

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Weathering of Compounded Products

Wypych¹

2013

Handbook of Material Weathering

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Effect of acid groups in hydroxyl functional resins on the properties of polyester-urethane powder coatings

Cited by 6 publications

References 0 publications

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Water‐based inorganic/polymer hybrid particles prepared via a multiple miniemulsion process

Weathering of Compounded Products

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