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Elvacite™ BR-73 is an acrylic resin used in coatings for PVC and PVC leather processing. It is also used in automotive refinish and wallpaper coatings.
Nonvolatiles, min %: 99.0
Clarity in toluene at 30% solids: Clear
Gardner color, max: 2
Gardner viscosity at 25°C and 30% solids in toluene: Q–U
Glass transition temp, calculated onset °C: 97
Molecular weight: 75,000
Acid number, mg KOH/g resin: 3.3
MFI, g/10 min at 230°C: 3.9;
Primary Chemistry:
Acrylic
Elvacite™ BR-73 is a methyl methacrylate bead resin with a relatively high glass transition temperature (Tg) of 97°C. It is among the hardest of Elvacite™ resins and forms films with superior toughness characteristics. Despite this, it has a modest solubility range, contributes a moderate degree of flexibility in coating films, and offers good adhesion and pigment dispersion capabilities. BR-73 dissolves in solvents such as toluene, MEK, acetone, and ethyl acetate, forming clear solutions with high viscosity. While BR-73 is used as a binder in applications with rigid substrates, as in the case of automotive refinish coatings and PVC parts, it is also used as a binder in coatings applied to wallpaper. Additionally, it may be used as a processing aid for PVC leathers.
Low durability of coatings exposed to physical or environmental stress Difficulty finding resins that offer a modest degree of flexibility while exhibiting maximum toughness
Automotive refinish coatings Industrial coatings PVC coatings PVC processing Wallpaper coatings
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