Process for preparing a foamed body
First Claim
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1. A process for preparing a foamed body comprising steps of (1) mixing the following four components:
- a. an aqueous solution having a pH of up to 2.0 and containing at least one member selected from the group consisting of acids and water-soluble acidic phosphates,b. at least one member selected from the group consisting of cement materials and anhydrous alkali metal silicates,c. a metal blowing agent, andd. a foaming stabilizerin the proportion of about 10 to about 400 parts by weight of the component (a), 100 parts by weight of component (b) calculated as a metal oxide M2 O or M'"'"'O wherein M is alkali metal and M'"'"' is alkaline earth metal, about 0.5 to about 30 parts by weight of the component (c) and about 3 to about 50 parts by weight of the component (d), to obtain a pasty mixture, (2) shaping the resulting pasty mixture to a desired shaped mass and (3) leaving the shaped mass to stand to effect foaming, the acids having an electric dissociation constant (pKa) of up to 4.0 at 25°
C, the foaming stabilizer being at least one member selected from the group consisting of activated carbon, zeolite, silica gel, carbon black, talc and mica.
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Abstract
A process for preparing a foamed body comprising a step of mixing the four components of:
A. an aqueous solution having a pH of up to 2.0 and containing at least one of acids and water-soluble acidic phosphates,
B. at least one of cement materials and anhydrous alkali metal silicates,
C. a metal blowing agent, and
D. a foaming stabilizer
To obtain a pasty mixture, the acids having an electric dissociation constant (pKa) of up to 4.0 at 25° C, the foaming stabilizer being at least one member selected from the group consisting of activated carbon, zeolite, silica gel, carbon black, talc and mica.
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Citations
14 Claims
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1. A process for preparing a foamed body comprising steps of (1) mixing the following four components:
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a. an aqueous solution having a pH of up to 2.0 and containing at least one member selected from the group consisting of acids and water-soluble acidic phosphates, b. at least one member selected from the group consisting of cement materials and anhydrous alkali metal silicates, c. a metal blowing agent, and d. a foaming stabilizer in the proportion of about 10 to about 400 parts by weight of the component (a), 100 parts by weight of component (b) calculated as a metal oxide M2 O or M'"'"'O wherein M is alkali metal and M'"'"' is alkaline earth metal, about 0.5 to about 30 parts by weight of the component (c) and about 3 to about 50 parts by weight of the component (d), to obtain a pasty mixture, (2) shaping the resulting pasty mixture to a desired shaped mass and (3) leaving the shaped mass to stand to effect foaming, the acids having an electric dissociation constant (pKa) of up to 4.0 at 25°
C, the foaming stabilizer being at least one member selected from the group consisting of activated carbon, zeolite, silica gel, carbon black, talc and mica. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification