Title: POLYURETHANE ENCAPSULATE
Number/Link: WO2014/176390
Applicant/Assignee: Dow
Publication date: 30-10-2014
“Gist”: Use of polybutyleneoxide polyols for hydrophobic encapsulants.
Why it is interesting: The encapsulation of water soluble compounds for controlled release, like e.g. plant nutrients and fertilizers, requires a relatively hydrophobic coating. Often this is accomplished with polyurethane coatings to which hydrophic compounds are added such as castor oil derivatives. These additives can however have a deleterious effect on other coating properties. According to this invention encapsulation coatings with good mechanical properties and improved water absorption and water vapour transmission properties can be prepared from polybutyleneoxide triols and polymeric MDI without the need for other additives.
Butylene oxide
Innovation in Polyurethanes 