US 12,246,270 B2
Biobased defoamer compositions and methods of preparation thereof
Gerry Heebner, Savannah, GA (US); Michael Bulanov, Almere (NL); Patrick van Waes, Almere (NL); and Bert Krutzer, Almere (NL)
Assigned to Kraton Chemical, LLC, Jacksonville, FL (US)
Filed by Kraton Chemical, LLC, Jacksonville, FL (US)
Filed on Aug. 31, 2022, as Appl. No. 17/823,553.
Claims priority of provisional application 63/260,996, filed on Sep. 8, 2021.
Prior Publication US 2024/0066436 A1, Feb. 29, 2024
Int. Cl. B01D 19/04 (2006.01)
CPC B01D 19/0413 (2013.01) [B01D 19/0422 (2013.01)] 20 Claims
 
1. A method of defoaming a system subject to foaming, comprising:
treating the system with 0.001 to 10 wt. % of a defoamer composition, based on total weight of the system;
wherein the defoamer composition comprises:
(a) 80 to 100 wt. % of a decarboxylated rosin acid (DCR) having a density of 0.9 to 1.0 g/cm3, a flash point of 135 to 175° C., an acid value of <50 mg KOH/g, measured according to ASTM D465, and a viscosity of 15 to 60 cSt at 40° C., measured according to ASTM D-445; and
(b) 0 to 20 wt. % based on total weight of the defoamer composition of at least a component selected from the group consisting of nanoparticles, surfactants, hydrophobic compounds, and mixtures thereof; and
wherein the defoamer composition reduces a foam content by at least 20 volume % relative to the system without the defoamer composition.