Organic-inorganic composite

Details Organic-inorganic composite Organic-inorganic composite

C - Chemistry, Metallurgy

04

B

C04B 24/10 (2006.01) C04B 28/10 (2006.01) C08L 3/04 (2006.01) C08L 3/06 (2006.01) C08L 3/08 (2006.01)

Patent

CA 2548730

An inorganic-organic composite comprises an inorganic phase, such as gypsum crystals, and a film forming organic phase. The film forming organic phase is selected from substituted starches having a degree of polymerization; degree of substitution and viscosity such that the substituted starches are insoluble in water during mixing but dissolve at a higher processing temperature during forming, setting or drying of the composite. Thus, excessive migration of the substitute starch is prevented and the composite is substantially strengthened.

L'invention concerne un composite inorganique-organique comprenant une phase inorganique, telle que des cristaux de gypse et une phase organique de formation de film. Ladite phase est sélectionnée à partir d'amidons substitués possédant un degré de polymérisation, un degré de substitution et une viscosité tels que les amidons substitués sont insolubles dans l'eau pendant un mélange, mais se dissolvent à une température de traitement élevée pendant la formation, le durcissement et le séchage du composite. De ce fait, une migration excessive de l'amidon substitué est empêchée et le composite est sensiblement renforcé.

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