Kinetic study of crosslinking between acetoacetoxy and hexamethylene diamine functionalized waterborne latexes in two-pack systems

A kinetic study of the crosslinking reaction between waterborne polymer particles functionalized with aceto acetoxy ethyl methacrylate (AAEMA) and polymer particles functionalized with hexamethylene diamine (HMDA) is presented. Seeded emulsion polymerization is used to synthesize the polymer particl...

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Bibliographic Details
Published in:Progress in organic coatings 2022-04, Vol.165, p.106732, Article 106732
Main Authors: Tariq, Sheraz, Irusta, Lourdes, Fernández, Mercedes, Paulis, Maria
Format: Article
Language:English
Subjects:
Acetoacetoxy ethyl methacrylate
Chemical reactions
Crosslinking
Crosslinking reactions
Diamine
Diamines
Emulsion polymerization
Film formation
Film properties
Kinetic study
Polymers
Rheological properties
Room temperature
Tensile strength
Two –pack system
Water absorption
Waterborne latex
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Summary:A kinetic study of the crosslinking reaction between waterborne polymer particles functionalized with aceto acetoxy ethyl methacrylate (AAEMA) and polymer particles functionalized with hexamethylene diamine (HMDA) is presented. Seeded emulsion polymerization is used to synthesize the polymer particles and the crosslinking reaction is followed during the film formation of the two-pack system. The kinetics of reaction with respect to time and temperature are studied using FTIR spectroscopy and rheological measurements, and the effects of crosslinking are also analysed by tensile strength and water absorption test. It is found that room temperature crosslinking occurs, as previously suggested in the literature, but at relatively slow rates. On the other hand, the annealing at 60 °C enhances considerably such crosslinking reactions, leading to fully interparticle crosslinked systems with improved mechanical and chemical resistance properties. •Use of chemical crosslinking to overcome film formation dilemma•Preparation of acetoacetoxy and amine functionalized two-pack binder system•Kinetic study of acetoacetoxy-amine crosslinking reaction during film formation•Crosslinking reaction is not fully achieved at room temperature for 3 days.•Mechanical and water resistance properties improved after annealing at 60 °C 1 day.
ISSN:0300-9440
1873-331X
DOI:10.1016/j.porgcoat.2022.106732