Influence of coalescing aids on the latex properties and film formation of waterborne coatings

Berce, Peter; Skale, Saša; Razboršek, Tina; Slemnik, Mojca

doi:10.1002/app.45142

Cited by 22 publications

(14 citation statements)

References 35 publications

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“… 42 , 43 We can, however, not rule out the possibility that the presence of IPA could also have other effects that play a role in the film formation such as a plasticizing effect or acting as a coalescence aid. 40 , 44 , 45 …”

Section: Resultsmentioning

confidence: 99%

Understanding and Improving the Oil and Water Barrier Performance of a Waterborne Coating on Paperboard

Bakker

Bosveld

Metselaar³

et al. 2022

ACS Appl. Polym. Mater.

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Using paperboard as packaging material is more sustainable than using plastic. To be a viable replacement, however, the barrier properties of paperboard need to be improved. Applying a waterborne barrier coating for both oil and water is an attractive method to improve the barrier performance of paperboard food packaging. However, not much is known about the oil and water barrier properties and penetration pathways of such coatings. Here, an alkali-soluble resin (ASR)-stabilized waterborne emulsion polymer was prepared and applied on untreated paperboard. Its performance as oil and water barrier coating was investigated, and the penetration pathways for both oil and water through the coating are discussed. The presence of surface defects in the coating applied on the paperboard strongly affects both the oil and water barrier properties, but the coating’s morphology and chemical nature only play a major role in the water barrier performance. The optimal barrier performance for oil and water was achieved when adding 5 wt % isopropanol (IPA) to the dispersion and applying two coating layers on paperboard. The IPA improves film formation and reduces the number of surface defects, which is explained by a more favorable spreading coefficient of the coating over the paperboard substrate. These insights will help to improve the oil and water barrier properties of polymer-coated paperboard for more sustainable packaging applications.

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Section: Resultsmentioning

confidence: 99%

Understanding and Improving the Oil and Water Barrier Performance of a Waterborne Coating on Paperboard

Bakker

Bosveld

Metselaar³

et al. 2022

ACS Appl. Polym. Mater.

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“…Alternatively, toluene was added to the Pickering emulsions to form a coherent shell of the capsules. The interdiffusion of polymer chains across particle boundaries might result in a nonporous polymer film . Toluene, as a solvent for polystyrene, was used to promote polymer diffusion across particle boundaries.…”

Section: Resultsmentioning

confidence: 99%

The tough microcapsules of acrylic acid–styrene–isoprene–styrene quadrablock copolymer shell via Pickering emulsion technique

Xia

Luo

2018

J of Applied Polymer Sci

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Pickering emulsion technique has been demonstrated a simple method to fabricate the microcapsules. However, the resulted microcapsules are often fragile. This limits their applications. Here, we report that the microcapsules with the nanostructured shell of poly(acrylic acid-b-styrene-b-isoprene-b-styrene) (ASIS), which is of high toughness and elasticity, could be fabricated via Pickering emulsions using ASIS nanoparticles as stabilizing particles. The surfactant-free ASIS latex (with theoretical molecular weight for each block: 1.5k-15k-55k-10k) was synthesized by reversible additional fragmentation transfer (RAFT) emulsion polymerization using amphiphilic macro-RAFT agent [poly(acrylic acid) 20 -b-polystyrene 5 trithiocarbonate] as both reactive surfactant and polymerization mediator. It was found that the ASIS nanoparticles were able to self-assemble on oil/water interface to stabilize Pickering emulsion of hexadecane in the pH range from 8 to 12. The droplet diameter was finely tuned from 17 to 5 mm by increasing the ASIS particle levels from 0.13 to 12 wt % based on the mass of the ASIS aqueous dispersions. With toluene as a coalescing aid, the capsules with a coherent and nonporous shell were obtained with the dispersed phase volume percentage as high as 50%. The toluene treated capsules were so mechanically strong to survive the utrasonic treatment.capsules were so mechanically strong to survive the utrasonic treatment.

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“…Regarding the scientific literature, coalescent concentration, hydrophobicity, and volatility effects on latex properties and film formation were investigated in [8]. In addition, coalescent influence on technical paint performance was also evaluated regarding glass transition temperature [9] and accelerated weathering [10].…”

Section: Introductionmentioning

confidence: 99%

Green Coalescent Synthesis Based on the Design for Environment (DfE) Principles: Brazilian Experience

2021

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Coalescents are compounds with a high potential for generating tropospheric ozone, which causes adverse effects on humans and their surroundings. This study designed a coalescent for decorative paints that reached technical levels equivalent to those obtained by StC, a product on the market, but with better environmental and economic performance. The strategy adopted in creating the green coalescent (GrC) improved film formation and reduced the product’s atmospheric emission rate. Regarding the environmental performance, GrC outperformed StC in terms of water consumption, global warming potential, and human toxicity by 30%, 35%, and 91%, but had a high smog formation potential even with a reduced loss to the air. The redesign of the molecule gave rise to AGrC, which achieved a more homogeneous environmental performance. The results of an economic analysis indicated that the procedures adopted to reduce environmental impacts could also make the coalescent more competitive if the lowest market prices were practiced. On the other hand, if the products are sold at high prices, the paint industry tends to privilege the economic dimension and disregard environmental performance for decision purposes. This research succeeded in reconciling technical functions and aspects related to sustainability to design more competitive products in the Brazilian market.

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Influence of coalescing aids on the latex properties and film formation of waterborne coatings

Cited by 22 publications

References 35 publications

Understanding and Improving the Oil and Water Barrier Performance of a Waterborne Coating on Paperboard

Understanding and Improving the Oil and Water Barrier Performance of a Waterborne Coating on Paperboard

The tough microcapsules of acrylic acid–styrene–isoprene–styrene quadrablock copolymer shell via Pickering emulsion technique

Green Coalescent Synthesis Based on the Design for Environment (DfE) Principles: Brazilian Experience

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