Inorganic foam based on geopolymers
AssigneeSika Technology AG
InventorsSarunas Turcinskas, Bernhard Feichtenschlager, Gerhard Albrecht, Pauline Petit, Urs Gonzenbach, Philip Sturzenegger
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Abstract
The present invention relates to a process for preparing a particle-stabilized inorganic foam based on geopolymers, to a particle-stabilized inorganic foam based on geopolymers, to a cellular material obtainable by hardening and optionally drying the particle-stabilized inorganic foam based on geopolymers, and to a composition for preparing an inorganic foam formulation for providing a particle-stabilized inorganic foam based on geopolymers.
Claims14
A process for preparing a closed-cell inorganic foam comprising the steps of:
- (1) mixing
- (i) at least one group of inorganic particles;
- (ii) at least one amphiphilic compound;
- (iii) at least one inorganic binder mixture comprising
- (iiia) at least one inorganic binder selected from the group consisting of blast furnace slag, microsilica, metakaolin, aluminosilicates, and mixtures thereof,
- (iiib) at least one alkaline activator selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal aluminates, alkali metal silicates, and mixtures thereof,
- wherein the (i) at least one group of inorganic particles is not identical to the (iiia) at least one inorganic binder or the (iiib) at least one alkaline activator;
- (iv) water;
- and optionally
- (v) at least one additive;
- and
- (2) foaming the resulting foam formulation by chemical, physical or mechanical foaming,
- wherein the at least one amphiphilic compound comprises amphiphilic compounds with at least one polar head group and at least one apolar tail group, wherein the at least one head group is selected from the group consisting of phosphates, phosphonates, sulfates, sulfonates, alcohols, amines, amides, pyrrolidines, gallates, and carboxylic acids;
- and
- wherein the at least one tail group is selected from an aliphatic or an aromatic or a cyclic group with 2 to 8 carbon atoms, wherein the carbon atoms are optionally substituted with one or more, same or different substituents selected from C1-C8-alkyl, secondary —OH, and secondary —NH2.
A closed-cell inorganic foam comprising:
- (i) at least one group of inorganic particles;
- (ii) at least one amphiphilic compound, wherein the at least one amphiphilic compound comprises amphiphilic compounds with at least one polar head group and at least one apolar tail group, wherein the at least one head group is selected from the group consisting of phosphates, phosphonates, sulfates, sulfonates, alcohols, amines, amides, pyrrolidines, gallates, and carboxylic acids;
- and wherein the at least one tail group is selected from an aliphatic or an aromatic or a cyclic group with 2 to 8 carbon atoms, wherein the carbon atoms are optionally substituted with one or more, same or different substituents selected from C1-C8-alkyl, secondary —OH, and secondary —NH2;
- (iii) at least one inorganic binder mixture comprising
- (iiia) at least one inorganic binder selected from the group consisting of blast furnace slag, microsilica, metakaolin, aluminosilicates, and mixtures thereof, and
- (iiib) at least one alkaline activator selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal aluminates, alkali metal silicates, and mixtures thereof;
- wherein the (i) at least one group of inorganic particles is not identical to the (iiia) at least one inorganic binder or the (iiib) at least one alkaline activator;
- (iv) water;
- and optionally
- (v) at least one additive.
Dependencies are inferred from the claim text.