DuPont cellulosic products such as METHOCEL™ are fitting binders and thickeners for agricultural products. They suspend pesticides or fertilizers in water-based sprays to help for sufficient distribution on the foliage or seeds. Additionally, they are effective film formers for seed coatings. As METHOCEL™ is chemically inert and nonionic, it is highly compatible with a variety of active ingredients. An emerging trend in fertilizer delivery is the use of water-soluble bags. POLYOX™ water-soluble resins are ideal for this type of packaging. POLYOX™ is also an extremely effective drift control agent.
DuPont cellulosic and poly(ethylene oxide) products can be used in a variety of agricultural applications. For example, seed coatings are frequently used to increase yield in row crops. ETHOCEL™ ethylcellulose polymers are highly insoluble in water; therefore, they can be used as a binder and film-former for water-insoluble coatings. Such coatings have application in the controlled release of active ingredients to aid germination. METHOCEL™ cellulose ethers are versatile, water-soluble methylcellulose and hydroxypropyl methylcellulose polymers. These are used as an adhesion aid or “sticker” for seed coatings. They act as a binder in granulation and can help compatibilize liquid solutions, emulsions and suspensions.
Water soluble thickeners are frequently used in spray pesticides and fertilizers to help control drift or delay evaporation. Some pesticides or fertilizers can only effectively treat so long as they remain hydrated on the plant. Additionally, POLYOX™ Water-Soluble Resins help reduce spatter and mist formation of aqueous formulations. This property can make it easier to apply insecticide, pesticide and herbicides by spraying without fogging or drift to adjacent areas. ETHOCEL™ dissolves in a wide range of solvents such as aromatic hydrocarbons, natural oils and others. They make ideal thickeners for non-aqueous formulations.
Water soluble packaging or pods are becoming increasingly popular delivery systems for insecticides, pesticides, and herbicides. Such packaging provides the end-user with a premeasured quantity of the product to be applied, prevents direct contact with the substance, and minimizes measurement error. POLYOX™ combines high water-solubility with thermo-plasticity making POLYOX™ useful to manufacture this type water-soluble packaging. The resultant film has heat-sealing characteristics with strong closures being formed at 135 – 165 °F (57 – 74 °C).
A broad range of available METHOCEL™ and ETHOCEL™ allows formulators to select the film former, encapsulant, binder or rheology modifier that best meets their needs. POLYOX™ provides water-solubility combined with thermoplasticity, lubricity and anti-mist properties.
» Learn more about how METHOCEL is used for seed coating binding