Epoxide moisture barrier coatings containing thermoplastic resins
AssigneeSurface Chemists of Florida, Inc.
InventorsA. Jaeton Glover, Alice P. Hudson, Stefan J. Kelly, Russell Klare, Cynthia Moss, Matthew Taylor
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Abstract
A moisture barrier coating includes the reaction product of (A) at least one polyglycidyl ether resin, and (B) at least one epoxy curing agent comprising amines. The moisture barrier coating further includes at least one amorphous thermoplastic material that is nonreactive with A and with B, and that forms a homogeneous mixture with at least one of A or B. A controlled release fertilizer, a method for the production of a controlled release fertilizer, and a moisture barrier coating system are also disclosed.
Claims21
A moisture barrier coating comprising the reaction product of:
- A. at least one polyglycidyl ether resin, and
- B. at least one epoxy curing agent comprising amines
- and further comprising at least one amorphous thermoplastic material that is nonreactive with A and with B, and that forms a homogeneous mixture with at least one of A or B.
A controlled release fertilizer comprising:
- A. a central core containing water soluble plant nutrients
- B. a moisture barrier coating completely enveloping the central core, said moisture barrier coating comprising the reaction product of:
- i. at least one polyglycidyl ether resin, and
- ii. at least one epoxy curing agent comprising amines
- and further comprising at least one amorphous thermoplastic material that is nonreactive with A and with B, and that forms a homogeneous mixture with at least one of A or B.
A method for the production of a controlled release fertilizer, said method consisting essentially of
- A. the provision of fertilizer granules
- B. heating the granules with agitation
- C. applying a coating comprising at least one polyglycidyl ether resin, at least one epoxy curing agent comprising amines, and at least one nonreactive thermoplastic material to the heated fertilizer granules, and
- D. continuing agitation and heating until the polyglycidyl ether resin and epoxy curing agent containing the thermoplastic material have formed a substantially uniform coating on the fertilizer particles, and have reacted to form a polymer.
A moisture barrier coating system comprising:
- A. at least one polyglycidyl ether resin, and
- B. at least one epoxy curing agent comprising amines
- and further comprising at least one amorphous thermoplastic material that is nonreactive with A and with B, and that forms a homogeneous mixture with at least one of A or B.
Dependencies are inferred from the claim text.