agrimer™ va copolymers
chemistry: VP and VA polymers
agrimer™ va copolymers series include linear random copolymers that form hard, glossy, thermoplastic films. The films are oxygen permeable with good water holding properties, appropriate for seed coatings and leaf adhesion. Agrimer™ va copolymers have good adhesive, cohesive, and binding properties for several substrates and a host of active ingredients. Can be used as a co-dispersant in enhancing solubility/dispersibility of complex active ingredients for improved bio-availability.
Provides excellent survivability of biological materials / living organisms such as rhizobia.
- linear, random copolymers of vinyl pyrrolidone (VP) and vinyl acetate (VA)
- family includes both hydrophobic and hydrophilic, thermoplastic, oxygen permeable polymers
- solubility varies with the proportion of vinyl acetate
- insoluble in ethers and aliphatic hydrocarbons
- soluble in water if VP content is greater than 50%
- increased VA content gives increased hydrophobicity and decreased hygroscopicity, Tg
benefits
- forms films with a wide range of water resistance properties
- dusting reduction in coatings
- uniform films that enhance survival rate of rhizobia
- adhesive and cohesive properties
- can enhance hydrophobic active ingredient solubility / dispersibility
- effective at reducing surface tension of water
- effective at reducing oil/water interfacial tension
suggested applications
- seed coatings
- binders for water dispersible granules
- film forming agent
- co-stabilizers in water-based flowable formulations
- controlled release via co-precipitation with polybasic acids
- binders in thermal extrusion
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