A method for preparing open-celled growing media and growing...

Details A method for preparing open-celled growing media and growing... A method for preparing open-celled growing media and growing...

A - Human Necessities

01

G

A01G 9/10 (2006.01) C08J 5/24 (2006.01)

Patent

CA 2212033

A process for producing hydrophilic growing media, preferably plugs, providing growing media having improved properties and a minimal amount of binding agent. The method forms a resilient, integral, dimensionally stable, cohesive, homogenous mass by contacting an aggregate with a hydrophilic urethane prepolymer and water. Upon curing, the prepolymer binds the aggregate material together. The mixing of the aggregate, prepolymer and water is conducted under specific, carefully controlled conditions, which enables the use of less prepolymer than would otherwise be necessary to obtain a given strength and stable air space.

Un procédé permet de produire des milieux de croissance hydrophiles, des mottes de préférence, à caractéristiques améliorées et avec une quantité minimum d'agent d'adhérence. Il consiste à former une masse faisant ressort, d'un seul tenant, à dimensions stables, cohésive et homogène, en mettant un agrégat en contact avec un prépolymère d'uréthane hydrophile et de l'eau. Lors de la polymérisation, ce prépolymère se lie au matériau de l'agrégat. Le mélange de l'eau et du prépolymère constituant ce dernier intervient dans des conditions spécifiques soigneusement maîtrisées, ce qui permet d'utiliser avec ce procédé moins de prépolymère pour obtenir une solidité donnée et un volume d'air stable.

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