Back to results
US 4,063,919 AGranted
Fertilizer rods
AssigneeMonsanto Company
InventorJoseph Grano, Jr.
Life of this patent
Estimating the term…
Abstract
The invention relates to a fertilizer rod composition comprising about 100 parts of a polyvinyl alcohol, about 0 to 20 parts of a plasticizer and about 10 to 350 parts of a fertilizer, a process for producing said rod and a product of said process.
Claims16
A fertilizer rod composition comprising:
- A. about 100 parts by weight of a water soluble polyvinyl alcohol polymer,
- B. about 0 to 20 parts by weight of a plasticizer for said polyvinyl alcohol, and
- C. about 10 to 350 parts by weight of a fertilizer, said composition being an uniform blend of (A), (B) and (C), or (A) and (C) when (B) is 0 bonded in the form of a rod by (A) as a matrix phase, said rod being water soluble.
A method for preparing fertilizer rods comprising the steps:
- A. dry blending about 100 parts by weight of a granular polyvinyl alcohol with about 0 to 20 parts by weight of a plasticizer forming a first dry blend,
- B. mixing said first dry blend with from about 10 to 350 parts by weight of a fertilizer to form a second dry blend followed by,
- C. melt extruding said second dry blend through a profile die forming a fertilizer rod.
Dependencies are inferred from the claim text.