Hyperbranched polyesters based on bis-MPA

Similar materials, hyperbranched polyesters based on bis-MPA and a polyol are now commercially available [11] from Perstorp AB under the trade name Boltorn [12], Figure 8.1. The average number of hydroxyl groups per molecule can be tailored between 8 and 64 and molecular weight can be varied between c. 2000 and 11 000. The co-polymerization of bis-MPA and a polyol core keeps the molecular weight distribution fairly low, typically below 2. 

Fig. 2. Hyperbranched polyester based on bis-MPA and a polyol, commercially available from Perstorp AB (http //www.perstorp.com) under the trade name Boltorn.

Fig. 11. Melt viscosity at 85 °C vs molar mass for hydroxy-functional hyperbranched aliphatic polyesters based on bismethylol propionic acid. Theoretical molar mass based on core bis-MPA ratio ( ) and Mn determined with SEC relative to linear polystyrene standards (O) [117]...

DENDRIMERS AND HYPERBRANCHED ALIPHATIC POLYESTERS BASED ON 2,2-Bis(HYDROXYMETHYL)PROPIONIC ACID (Bis-MPA)... 

Dendrimers and Hyperbranched Aliphatic Polyesters Based on 2,2-Bis(hydroxyme-thyl)propionic Acid (bis-MPA) [H. Ihre, M. Johansson, E. Malmstrom, A. Hult, Chapt. 3],... 

---