Changes of solubility parameters during evaporation of solvents as a factor influencing the self-stratification of epoxy/acrylic systems

Effect of solvent on PARALOID® B72 and B44 acrylic resins used as adhesives in conservation

“…Many recent studies confirm the good qualities of Paraloid ® for different restoration treatments [4][5][6][7][8]. Paraloid ® is very used as a reference when testing or studying new products [9][10][11][12][13][14][15]. Its preparation depends on its intended function (protection, consolidation or adhesion) and use.…”

Self-stratified bio-based coatings: Formulation and elucidation of critical parameters governing stratification

“…Then, Walbridge stated that for binary polymers blend in solution the stratification mechanism was similar and the evaporation process had no influence on the stratification [31]. Afterwards, in contrast, several authors stated that phase separation in such polymer solution was initiated by solvent evaporation [32][33][34] [35]. According to these papers, it was argued that in selfstratifying systems, the first phase separation starts immediately after the application of the coating on the substrate, driven by solvent evaporation.…”

“…In almost all literature studies, stratification is evaluated at the end of the curing step, but it is difficult to get information on the stratification process once the coating is applied on the substrate, more specifically on the kinetics of resins separation during curing. Some authors, as Abbasian et al [41] or Langer et al [32], have followed the resins separation in real-time using FTIR-ATR, by recording the evolution of the absorbance of specific peaks, but the resins separation process has not yet been examined microscopically. Thus, the aim of this work was also to investigate in situ the stratification mechanism of one of the bio-based epoxy/silicone coating previously obtained, showing at the end a Type I stratification.…”

One pot flame retardant and weathering resistant coatings for plastics: a novel approach

“…6,9,29 The HSP can also be used for the selection of solvents, as the solvents used for the formulation process have to dissolve both selected resins. 5,6,[34][35][36] The solubility parameters of the uoropolymer and epoxy resins were determined in 54 solvents of known solubility at 20 C at a concentration of 10% solids. The solutions were mixed for 24 hours and le to rest for extra 24 hours.…”