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US 3,936,976 AGranted
Anti-erosion coating of seeds
AssigneeNorthrup, King & Company
InventorsFrederic E. Porter, Howard E. Kaerwer, Jr.
Life of this patent
Estimating the term…
Abstract
In the disclosed method, grass seed or the like is coated with an inner "sticker" coating to which is adhered discrete particles of water-activatable adhesive. The resulting seed is resistant to movement by wind and water after sowing or planting.
Claims10
A process for preparing plant seeds for planting comprising the steps of:
- a. coating the seeds with a substantially water-free tacky film which will not activate a water-activatable adhesive,
- b. contacting said tacky film with a dry, solid, particulate water-activatable adhesive which is not activated by said tacky film, said adhesive being capable of forming pseudoplastic, viscoelastic, pituitous water solutions in 1 weight percent concentration in water, at least 98% by weight of the particles of said adhesive being small enough to pass a 10 mesh screen;
- said contacting step being continued until (1) said seeds are covered with an adherent outer layer of discrete granules of said adhesive as the outermost layer of the coating on said seeds, and (2) said seeds are a dry, free flowing mass of discrete seeds.
A coated plant seed, said plant seed being coated with:
- a. a substantially water-free inner sticker coating, bonded to said seed, the composition of said inner sticker coating being capable of being tacky in a substantially water-free state,
- b. adhered to said sticker coating as the outermost coating on said seed, a particulate coating comprising a dry, solid, particulate water-activatable adhesive which is not activated by said inner sticker coating when said inner sticker coating is substantially water-free and tacky, said water-activatable adhesive being capable of forming pseudoplastic, viscoelastic, pituitous water solutions in 1 weight per cent concentrations in water, at least 98% by weight of the particles of said adhesive being small enough to pass a 10 mesh screen.
Dependencies are inferred from the claim text.