Effect of Surfactants and Cosolvents on the Behavior of Associative Thickeners in Latex Systems

Thibeault, Jane; Sperry, P. R.; Schaller, E. J.

doi:10.1021/ba-1986-0213.ch020

Cited by 21 publications

(14 citation statements)

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“…20 Hydrophobically-modified derivatives of Acryloydimethyltaurine (AMPS) copolymers were introduced as polymeric emulsifiers 21 that could emulsify and thicken reliably at the natural pH ( < 6) of the acid mantle of skin. Hydrophobically-modified acryloyldimethyltaurine copolymers with fluorocarbon hydrophobes have been patented.…”

Section: Thickenersmentioning

confidence: 99%

The Role of Polymers in Cosmetics: Recent Trends

Lochhead

2007

ACS Symposium Series

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Polymers represent the second largest class of ingredients in cosmetics and personal care products. A diverse range of polymers are applied in this segment as film formers, fixatives, rheology modifiers, associative thickeners, emulsifiers, stimuli-responsive agents, conditioners, foam stabilizers and destabilizers, skin-feel beneficial agents, and antimicrobials. This chapter reviews recent advances in the use of polymers in personal care formulation. The drive to meet the requirements of the Clean Air Act have drawn polymeric materials into formulations that are low in volatile-organic compounds. This has resulted in aqueous-based thickeners that also form films and act as fixatives. The onset of free-radial living polymerization offers the prospect of custom-designing the morphology of products to meet the desired attributes. Complex coacervate mechanisms dominate the functioning of conditioning shampoos.Stimuli-responsive polymers are being directed towards applications from make-up that camouflages wrinkles to the facile processing of multiple emulsions, to thermally-responsive systems that respond to the surface of skin.The use of polymers in cosmetics is highly developed, and innovative advances in polymer science and nanoscience are driving the creation of scientifically sophisticated products.

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Section: Thickenersmentioning

confidence: 99%

The Role of Polymers in Cosmetics: Recent Trends

Lochhead

2007

ACS Symposium Series

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“…As the name implies, particles are connected together in close proximity by a single thickness of thickener molecules. Bridging flocculation was discussed in detail in previous papers [2][3][4][5] and is not covered in detail in this paper due to the fact that it is fairly rare in fully formulated paints. This is because bridging usually occurs at additive levels much below those found in actual coatings formulations.…”

Section: Dispersion Of Particles In Latex Coatings Formulationsmentioning

confidence: 99%

Controlling particle dispersion in latex paints containing associative thickeners

Kostansek

2007

J Coat Technol Res

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Latex paints contain several types of particles including polymer binder, primary pigment, extenders, and colorants. When the paints contain associative thickeners, control of particle dispersion can be very complicated due to the interaction of the particles with dispersants, surfactants, and the associative thickener itself. In particular, dispersion of the pigments can act independently of dispersion of the binder particles. The consequences of this situation are manifested in the physical properties of the paint and of the films it forms. This paper describes these interactions in terms of their colloid chemistry and shows the consequences of additive choices on the particle dispersion and also the optical properties of model paint films.

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“…Understanding the nature of associative thickener interactions and their effects on rheology has been the focus of numerous studies. A vast majority of these studies focused on HEUR (hydrophobically modified, ethoxylated urethanes), [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] HASE (hydrophobically modified, alkali-swellable emulsions), 1,4,10,11,[19][20][21][22][23][24][25][26] and HMHEC (hydrophobically modified, hydroxyethyl cellulose) 1,4,27-31 associative thickener types. There is very little information available on another class of associative thickeners, HEAT (hydrophobically modified, ethoxylated aminoplast).…”

Section: Introductionmentioning

confidence: 99%

Shear-thickening in aqueous surfactant-associative thickener mixtures

2011

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Associative thickeners represent an important class of rheology modifiers used in waterborne coatings. Understanding molecular level interactions between associative thickeners and surfactants has been the subject of a number of prior studies. Our recent studies focused on the behavior of a hydrophobically modified, aminoplast ether (HEAT) associative thickener and a highly hydrophobic ethoxylated octylphenol surfactant in aqueous solution. Aqueous blends of these two materials exhibit shear-thinning, as well as rarely reported, transient, shear-induced thickening behavior. In addition, the same compositions exhibit both thixotropy and antithixotropy. The shear-induced thickening is shown to be the result of transient aggregated structures formed under shear. Addition of a third component, b-cyclodextrin-a molecule known to disrupt hydrophobic associations-to the mixture helped us advance the understanding of the nature of associative thickener-surfactant interactions that cause the transient shear-thickening behavior. Results indicate that, while overall viscosity of the HEAT/surfactant mixtures is decreased by b-cyclodextrin, the shear-induced thickening is unaffected. An intermolecular interaction model to describe the transient thickening mechanism is presented.

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Effect of Surfactants and Cosolvents on the Behavior of Associative Thickeners in Latex Systems

Cited by 21 publications

References 0 publications

The Role of Polymers in Cosmetics: Recent Trends

The Role of Polymers in Cosmetics: Recent Trends

Controlling particle dispersion in latex paints containing associative thickeners

Shear-thickening in aqueous surfactant-associative thickener mixtures

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