Microcapsule compositions and the method of their release
View Patent ↗The present invention provides microcapsules with good barrier properties and the ability to release encapsulated hydrophobic liquids at low and high pH.
1. A microcapsule composition comprising:
i) a core comprising a hydrophobic liquid; and
ii) a shell comprising the reaction product of at least one simple diester diacid chloride monomer and N,N′,N″-tris-(2-aminoethyl)-1,3,5-triazine-2,4,6-triamine.
2. The microcapsule composition of claim 1 wherein the simple diester diacid chloride monomer is pyromellitic diester diacid chloride.
3. The microcapsule composition of claim 1 wherein the hydrophobic liquid is 4,5-dichloro-2-n-octyl-3(2H)-isothiazolone.
4. The microcapsule composition of claim 1 wherein the hydrophobic liquid is a solution of dichloro-2-n-octyl-3(2H)-isothiazolone in a hydrophobic solvent.
5. A method of releasing a hydrophobic liquid wherein the method comprises placing a microcapsule composition comprising:
i) a core comprising a hydrophobic liquid; and
ii) a shell comprising the reaction product of at least one simple diester diacid chloride monomer and N,N′,N″-tris-(2-aminoethyl)-1,3,5-triazine-2,4,6-triamine
into an aqueous environment having a pH of 6 or less.
6. A method of releasing a hydrophobic liquid wherein the method comprises placing a microcapsule composition comprising:
iii) a core comprising a hydrophobic liquid; and
iv) a shell comprising the reaction product of at least one simple diester diacid chloride monomer and N,N′,N″-tris-(2-aminoethyl)-1,3,5-triazine-2,4,6-triamine
into an aqueous environment having a pH of 9 or greater.