Hydroresin dispersions: new emulsifier free binders for aqueous coatings

Schlarb, Bernhard; Rau, Maria Gyopar; Haremza, Sylke

doi:10.1016/0300-9440(95)00579-x

Cited by 19 publications

(15 citation statements)

References 9 publications

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“…Alkyd, acrylic, epoxy, acrylic/epoxy hybrid, polyurethane, polyester and other resins are widely used in the formulation of waterborne coatings [1,2]. Aqueous polymer dispersions can be divided into two groups: primary and secondary dispersions [3]. The primary dispersions (or synthetic latexes [4]) are formed by polymerization in the dispersed phase, whereas the secondary dispersions (or artificial latexes [4]) are formed via emulsification of a polymer solution.…”

Section: Introductionmentioning

confidence: 99%

Surfactant-free artificial latexes from modified styrene–maleic anhydride (SMA) copolymers

Soer

Ming

Klumperman

et al. 2006

Polymer

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Section: Introductionmentioning

confidence: 99%

Surfactant-free artificial latexes from modified styrene–maleic anhydride (SMA) copolymers

Soer

Ming

Klumperman

et al. 2006

Polymer

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“…26,27,28 To prepare a secondary dispersion, a polymer is initially synthesized via solution polymerization in a volatile organic solvent, and then the viscous polymer solution is dispersed in an aqueous phase after the neutralization of its acid groups with a base to provide stabilization. The organic solvent is finally removed by evaporation under vacuum.…”

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confidence: 99%

Water Vapor Sorption and Diffusion in Secondary Dispersion Barrier Coatings: A Critical Comparison with Emulsion Polymers

Liu

Soer

Scheerder

et al. 2015

ACS Appl. Mater. Interfaces

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The conventional method to synthesize waterborne polymer colloids is emulsion polymerization using surfactants. An emerging method is the use of secondary dispersions (SD) of polymers in water, which avoids the addition of any surfactant. Although there are numerous studies of the water barrier properties (sorption, diffusion and permeability) of waterborne emulsion (Em) polymer coatings, the properties of SD coatings, in comparison, have not been thoroughly investigated. Here, dynamic water vapor sorption analysis is used to compare the equilibrium sorption isotherms of the two forms of styrene-acrylate copolymers (Em and SD) with the same monomer composition. From an analysis of the kinetics of vapor sorption, the diffusion coefficient of water in the polymer coatings is determined. The combined effects of particle boundaries and surfactant addition were investigated through comparison of the properties of SD and Em coatings to those of (1) solvent-cast polymer coatings (of the same monomer composition), (2) Em polymers after dialysis to remove partially the water-soluble species, and (3) SD polymers with added surfactants. The results reveal that particle boundaries Materials and Interfaces (2015) 7, pp 12147-12157 2 and surfactants both increase vapor sorption. The diffusion coefficients of water are comparable in magnitude in all of the polymer systems but are inversely related to water activity because of molecular clustering. Compared to all of the other waterborne polymer systems, the SD barrier coatings show the lowest equilibrium vapor sorption and permeability coefficient at high relative humidities and also the lowest water diffusion coefficient at low humidities. These barrier properties make SD coatings an attractive alternative to conventional emulsion polymer coatings. Published in ACS Applied

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“…Emulsion polymerization of acrylic monomers leads to primary dispersions in which the polymerization and formation of the dispersion takes place at the same time . The acetone process consists of the consecutive preparation of a solvent‐borne acrylic copolymer with carboxylic acid groups and formation of a secondary dispersion upon partial neutralization, addition of water as well as removal of solvent . Influences on the particle size distributions are well known for the preparation of polyurethane dispersions also prepared by the acetone process .…”

Section: Introductionmentioning

confidence: 99%

Secondary dispersion‐based reactive pressure‐sensitive adhesives with improved tack

Kutlug

Reck²,

Hartwig

2018

J of Applied Polymer Sci

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Reactive pressure‐sensitive adhesives (PSA) have to meet the requirements for sufficient tack prior to crosslinking but also high shear after crosslinking. This article examines the use of secondary acrylic dispersions with reactive groups and epoxy resin dispersions for such PSA. Long‐term stable secondary PSA dispersions with high tack after film formation were obtained. Tack was dependent on the amount of carboxylic acid groups in the polymer as well as the base used for partial neutralization of the solvent‐borne copolymers. Reactive PSA were prepared by mixing a secondary dispersion with high amounts of carboxylic acid groups with an epoxy resin dispersion providing no tack. Variation of mixing ratio gave reactive PSA with sufficient tack, peel, and shear prior to crosslinking. Crosslinking of these reactive PSA at elevated temperatures led to high shear which was limited by incomplete molecular mixing of both phases. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46315.

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Hydroresin dispersions: new emulsifier free binders for aqueous coatings

Cited by 19 publications

References 9 publications

Surfactant-free artificial latexes from modified styrene–maleic anhydride (SMA) copolymers

Surfactant-free artificial latexes from modified styrene–maleic anhydride (SMA) copolymers

Water Vapor Sorption and Diffusion in Secondary Dispersion Barrier Coatings: A Critical Comparison with Emulsion Polymers

Secondary dispersion‐based reactive pressure‐sensitive adhesives with improved tack

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