Example 4
In this example, 42.0 g of PHA (6.7 mol % hydroxyhexanoate; Mw: 357,000 g/mol) was placed in 56 g of water with 0.8 g of Tween 20 sheared at 1100 RPM for 90 min. After shearing, the mixture was subjected to ultrasonic mixing for 3 minutes. 0.05 g of xanthan gum were added to the resulting white dispersion and further sheared at 400 RPM for 30 minutes. Finally, 0.1% of Biocide was added to the dispersion.
Example 5
A dispersion was prepared as given in Example 4. 0.75 mL of a dispersing agent (DISPERBYK 190) and 0.1 mL of a rheology modifier (BYK 425) was then added to this dispersion and sheared to ensure homogenous mixing.
Example 6
A dispersion was prepared as given in Example 5, and 10 g of Kaolin clay was then added and sheared to a homogenous dispersion.
