A novel hydroxide complex with condensed silicate, a process...

Details A novel hydroxide complex with condensed silicate, a process... A novel hydroxide complex with condensed silicate, a process...

C - Chemistry, Metallurgy

01

B

C01B 33/26 (2006.01) A01G 9/14 (2006.01) A01G 13/02 (2006.01) C01B 33/36 (2006.01)

Patent

CA 2197458

Novel composite hydroxide/condensed silicates of the general formula (I): [A12(Li(1-x).M2+x)(OH)6]2(SiyO2y+12-)1+x.mH20 (wherein M2+ is a divalent metal; m is a number satisfying the relationship: 0m5; x is a number satisfying the relationship: 0x1; and y is a number satisfying the relationship: 2y4); a process for the production thereof; and an infrared absorber and an agricultural film containing the same as the active ingredient. The above silicates exhibit a high infrared absorbing power, an excellent dispersibility in resins and a refractive index near those of resins, so that a resin composition containing the silicate can give an agricultural film excellent in heat retaining properties and transparency.

L'invention porte sur un nouveau composite hydroxyde/silicates condensés de la formule générale (I): [Al¿2?(Li¿(1-x)?.M ?2+¿¿x?)(OH)¿6?]¿2?(Si¿y?O2¿y+1??2-¿)¿1+x?.mH¿2?O, dans laquelle M?2¿ représente un métal bivalent, m, un nombre satisfaisant aux relations: 0?m?5, x, un nombre satisfaisant aux relations: 0?x?1 et y, un nombre satisfaisant aux relations: 2?y? 4. Cette invention porte également sur un procédé de production de ce composite, un absorbeur d'infrarouge ainsi que sur un film pour l'agriculture le contenant en tant qu'ingrédient actif. Les silicates susmentionnés présentent un pouvoir élevé d'absorption dans l'infrarouge, une excellente dispersibilité dans les résines et un indice de réfraction proche de l'indice de réfraction que l'on rencontre dans les résines, de sorte qu'une composition à base de résine comportant ce silicate est en mesure de fournir un film pour l'agriculture, remarquable pour ses propriétés de rétention thermique et de transparence.

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