Applied rheology and architectural coating performance

2019 ◽  
Vol 16 (2) ◽  
pp. 263-305 ◽  
Author(s):  
Richard R. Eley
Keyword(s):  
Coating Performance ◽  
Architectural Coating

scholarly journals Water-Resistant Latex Coatings: Tuning of Properties by Polymerizable Surfactant, Covalent Crosslinking and Nanostructured ZnO Additive

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 347
Author(s):  
Jana Machotová ◽  
Andréa Kalendová ◽  
Denisa Steinerová ◽  
Petra Mácová ◽  
Stanislav Šlang ◽  
...  
Keyword(s):  
High Performance ◽  
Water Resistance ◽  
High Water ◽  
Coating Performance ◽  
Polymerizable Surfactant ◽  
Ionic Crosslinking ◽  
Latex Coatings ◽  
Covalent Crosslinking ◽  
Coating Composition ◽  
Acrylic Latexes

This paper deals with the development of acrylic latexes providing high-performance water-resistant coatings. For this purpose, mutual effects of anionic surfactant type (ordinary and polymerizable), covalent intra- and/or interparticle crosslinking (introduced by allyl methacrylate copolymerization and keto-hydrazide reaction, respectively) and ionic crosslinking (provided by nanostructured ZnO additive) were investigated. The latexes were prepared by the standard emulsion polymerization of methyl methacrylate, butyl acrylate and methacrylic acid as the main monomers. The addition of surface-untreated powdered nanostructured ZnO was performed during latex synthesis, resulting in stable latexes comprising dispersed nanosized additive in the content of ca 0.9-1.0 wt.% (based on solids). The coating performance with emphasis on water resistance was evaluated. It was determined that the application of the polymerizable surfactant improved coating adhesion and water-resistance, but it wasn′t able to ensure high water-resistance of coatings. Highly water-resistant coatings were obtained provided that covalent intra- and interparticle crosslinking together with ionic crosslinking were employed in the coating composition, forming densely crosslinked latex films. Moreover, coatings comprising nanostructured ZnO additive displayed a significant antibacterial activity and improved solvent resistance.

Pigmented aqueous barrier coatings

TAPPI Journal ◽  
2020 ◽  
Vol 19 (11) ◽  
pp. 551-558
Author(s):  
ANTHONY V. LYONS ◽  
GREGG REED
Keyword(s):  
Barrier Function ◽  
Packaging Material ◽  
Physical Characteristics ◽  
Packaging Materials ◽  
Functional Coatings ◽  
Barrier Coatings ◽  
Coating Performance ◽  
Fundamental Understanding ◽  
Sustainable Packaging ◽  
Better Than

The desire for more sustainable packaging has led to the development of new packaging materials that are fiber based. Aqueous coatings are a pathway to improve the recyclability of these materials. Pigments used in these coatings can improve the performance of the coating and reduce cost while further improving the recyclability. Mineral pigments are also considered to be compost neutral. In this paper, we provide the reader a better fundamental understanding of the mechanisms by which pigments work in barrier coatings. A pigment’s mineralogy and physical characteristics are important to how it will perform, and there have been recent pigment developments that improve coating performance. This paper shows that some pigments are better than others in particular barrier applications. Also, pigmented base or pre-coats can be used to prepare the surface for more highly functional coatings that go on top, improving the barrier function of packaging material and reducing overall cost. Finally, the converting operation is of major importance in driving formulation choices for barrier applications.

Inorganic-organic nanocomposite networks: Structure, curing reaction, properties, and hard coating performance

2021 ◽  
pp. 109112
Author(s):  
Kuan Hoon Ngoi ◽  
Jia Chyi Wong ◽  
Chin Hua Chia ◽  
Kyeong Sik Jin ◽  
Heesoo Kim ◽  
...  
Keyword(s):  
Hard Coating ◽  
Coating Performance ◽  
Curing Reaction ◽  
Networks Structure
Sign in / Sign up

Export Citation Format

Share Document