Hydroresin dispersions: tailoring morphology of latex particles and films

Schlarb, Bernhard; Haremza, Sylke; Heckmann, W.; Morrison, Brad; Müller-Mall, Rudolf; Rau, Maria Gyopar

doi:10.1016/s0300-9440(96)00619-4

Cited by 10 publications

(6 citation statements)

References 18 publications

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“…It was apparent beforehand that increasing amounts of AA would lead to decreasing probe‐tack due to increasing T g as well as enhanced interactions by hydrogen bonds between polymer chains . However, it is known from literature that in contrast to primary dispersions a distinct amount of AA is required for the preparation of secondary dispersions . Therefore, the main purpose of this examination was to achieve PSA with high contents of AA and sufficient tack.…”

Section: Resultsmentioning

confidence: 99%

“…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%

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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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Section: Resultsmentioning

confidence: 99%

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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“…The low Mw high acid value polymer provides stability to the system and is responsible for the resolubility characteristics, whereas the high Mw low acid value polymer improves properties like water resistance. This concept has found wide applicability in several coating applications, including anticorrosion primers, decorative paints, road paints, 22 and industrial paints, where the low Mw part introduces overspray recyclability to the system. 23 Heterogeneity in glass transition temperature Combining particle populations in one system, which vary in glass transition temperature, gives useful properties which can be applied in many coatings applications.…”

Section: Heterogeneity In Hydrophilicitymentioning

confidence: 99%

Polymer heterogeneity in waterborne coatings

Overbeek

2009

J Coat Technol Res

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An overview is presented of the progress in understanding polymer heterogeneity over the last 20 years and how this has contributed to the improvement of coatings. Solvent-based polymers are homogeneous in nature, since all polymeric materials tend to be dissolved in the same solvent mixture. This is different for most waterborne polymers, which tend to be present in a compartmentalized way. Most polymeric materials are present in particles, which are separated by the continuous aqueous phase. This gives excellent opportunities to create particle morphologies that form the basis for the film morphology after drying of the coating. This article gives an overview of the various types of heterogeneity which are accessible in waterborne polymers and will show how heterogeneity in the polymer can contribute to the solution of several persistent problems of the coating industry.

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“…Here, the miniemulsion route represents an ecological meaningful improvement to the hydrosol technology 7) or secondary dispersions where artificial latexes by the emulsification of polymer solutions can be obtained 8,9) .…”

Section: Introductionmentioning

confidence: 99%