Waterborne latex coatings of color: II. Surfactant influences on color development and viscosity

Mahli, David M.; Wegner, Jon M.; Glass, J. Edward; Phillips, Daniel G.

doi:10.1007/bf02774593

Cited by 9 publications

(6 citation statements)

References 18 publications

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“…The initial level of triblock chosen was 12.5 mM, the level used in the surfactant study. 5 Both dispersant concentrations are well beyond that needed for a minimum viscosity, and will be used at lower concentrations in the last part of this study. The dominant parameter influencing the color development (-dL*) in the CB coatings is the structure of the triblock polymer.…”

Section: Resultsmentioning

confidence: 99%

“…6, 7) reflect a dilution effect when the colorant formulation (15.4 wt.%) is added to the waterborne latex coatings, discussed in our previous study. 5 In the larger latex there is less surface area (coating is prepared on a volume fraction basis) and more of the surfactant and triblock polymers reside in the aqueous phase. 8 There are complex interactions of these components with the HEUR thickener in the aqueous phase that will be discussed in a later article that may account for the different dilution effects noted in Fig.…”

Section: Rheology Of Cb/triblock Dispersant Coatingsmentioning

confidence: 99%

“…In the above studies, the triblocks are added to the colorant formulation at one concentration, 12.5 mM, based primarily on the amount used in the previous surfactant study, 5 and on the dispersant demand curve Fig. 1), commonly used by coating formulators.…”

Section: Variation In Triblock Concentrationmentioning

confidence: 99%

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Waterborne latex coatings of color: III. Triblock polyether influences on color development and viscosity

Mahli¹,

Wegner²,

Glass³

et al. 2007

J Coat Technol Res

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Oxyethylene (PEO)/oxypropylene (PPO) triblock polymers are added to colorant formulations to determine the influence of molecular weight and other structural variances on the rheology and color development of tinted latex paints. Waterborne coatings are a matrix of many coating components. In this study, a 108-or a 600-nm latex was thickened with a nonassociative thickener, hydroxyethyl cellulose, or an associative telechelic HEUR thickener. Triblock polymers with internal PPO segments and PEO terminal segments added as a dispersant to colorant packages, lead to better color development than PPO/PEO/PPO triblocks dispersants in carbon black (CB) tinted paints. The increase in color development with high molecular weight (MW) triblocks starts at a very low concentration (2 mM) and plateaus in a Langmuir-type adsorption isotherm. Lower molecular weight triblock polymers also exhibit this behavior in CB-, red-, and yellow-tinted latex coatings; however, increasing the terminal PEO segment sizes leads to better color development only in the CB-tinted coatings. With large PEO terminal units red and yellow tints are high only at very low concentrations (2 mM) of the triblock. This parabolic response in color development, in contrast to CB-tinted formulations, is attributed to the high surface area and porosity of CB that limits the amount of large PEO segments interacting with the talc particle present at twice the volume fraction of the colorant. With the lower surface areas of the red and yellow colorants, the interaction of the large PEO terminal segments with talc particles accounts for the limited triblock concentration for which good color development is observed. This can be reversed by decreasing or eliminating talc from the formulation.

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Section: Resultsmentioning

confidence: 99%

Section: Rheology Of Cb/triblock Dispersant Coatingsmentioning

confidence: 99%

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Waterborne latex coatings of color: III. Triblock polyether influences on color development and viscosity

Mahli¹,

Wegner²,

Glass³

et al. 2007

J Coat Technol Res

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“…For example, Mahli et al 41 studied the effect of surfactant on color development. They found SDS gave poorer color development compared to nonylphenol oxyethylene surfactant and attributed the difference to interactions of the surfactant to pigments in the formulation.…”

Section: Latex Pigment Interactionmentioning

confidence: 99%

Application of microcalorimetry to the study of interactions in coating formulations

et al. 2010

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Water-based coating formulations contain many components, such as latex binder, pigment, dispersant, thickener, and surfactant. Complex interactions between these components affect properties of the coating in both the wet and dried states. For example, rheology of the paint is dependent on the interactions of components in the formulation. Pigment interaction can affect the degree of dispersion and, therefore, have ramifications on end use properties such as hiding and tint strength of the paint film. Isothermal titration calorimetry has been used to determine the enthalpy of interaction of the coating components. Representative examples will be given to demonstrate structure-property relationships that correlate the interactions of latex, pigment, surfactant, dispersant, and thickener with paint viscosity as well as end use performance parameters such as adhesion and tint strength.

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“…In particular different spray angles and nozzle geometries 10) dictate the type and amount of thickeners. The interaction of associative (HEUR type) and non-associative thickeners (HEC) with the rest of additives in paints emphasizes the role of latex particle size, surfactant type, amount and type of the thickener used in the water borne paint systems [11][12][13][14] . While they are very important in achieving appropriate viscosity profile across the entire shear range encountered in paint applications, they might also introduce some adverse effects.…”

Section: Introductionmentioning

confidence: 99%

Na-Bentonite and MgO Mixture as a Thickening Agent for Water-Based Paints

Karakaş

Pyrgiotakis

Çelik

et al. 2011

KONA

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Waterborne latex coatings of color: II. Surfactant influences on color development and viscosity

Cited by 9 publications

References 18 publications

Waterborne latex coatings of color: III. Triblock polyether influences on color development and viscosity

Waterborne latex coatings of color: III. Triblock polyether influences on color development and viscosity

Application of microcalorimetry to the study of interactions in coating formulations

Na-Bentonite and MgO Mixture as a Thickening Agent for Water-Based Paints

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