US4084980A
Expired / Lapsed
US
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Process for preparing a foamed body
Assignee: SK Kaken Co Ltd
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Filing: 1976-08-18
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Granted: 1978-04-18
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Expires: 1996-08-18
Abstract
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.
Inventors
- 👤 Hideo Motoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:46
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
207 words
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, 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 M 2 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.
Claim 2
Dependent Claim
207 words
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, 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 M 2 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.
Claim 3
Dependent Claim
17 words
A process according to claim 1 wherein said aqueous solution has a pH of up to 1.5.
Claim 4
Dependent Claim
19 words
A process according to claim 1 wherein said electric dissociation constant is from 0.3 to 1.5 at 25° C.
Claim 5
Dependent Claim
13 words
A process according to claim 3 wherein said acid comprises an inorganic acid.
Claim 6
Dependent Claim
32 words
A process according to claim 4 wherein said inorganic acid is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, nitric acid, nitrous acid, phosphoric acid and chromic acid.
Claim 7
Dependent Claim
18 words
A process according to claim 1, in which said aqueous solution comprises a solution of water-soluble acidic phosphate.
Claim 8
Dependent Claim
16 words
A process according to claim 6, in which said water-soluble acidic phosphate comprises acidic aluminum orthophosphate.
Claim 9
Dependent Claim
29 words
A process according to claim 1, in which said cement material comprises at least one member selected from the group consisting of aluminates and silicates of alkaline earth metal.
Claim 10
Dependent Claim
36 words
A process according to claim 1, in which said alkali metal silicate comprises at least one water glass represented by Na 2 O.nSiO 2 or K 2 O.nSiO 2 , wherein n is 2.0 to 4.0.
Claim 11
Dependent Claim
34 words
A process according to claim 1, in which said metal blowing agent is selected from the group consisting of metal elements of Groups IIIA, IIIB, IVA, IVB, VA and VB of the Periodic Table.
Claim 12
Dependent Claim
21 words
A process according to claim 1, wherein said metal blowing agent is selected from the group consisting of aluminum and zinc.
Claim 13
Dependent Claim
77 words
A process according to claim 1, in which said proportion is 100 parts by weight of the component (b) calculated as a metal oxide M 2 O or M'O wherein M is alkali metal and M' is alkaline earth metal, about 20 to about 300 parts by weight of the component (a), about 1.0 to about 5.0 parts by weight of the component (c) and about 5 to about 10 parts by weight of the component (d).
Claim 14
Dependent Claim
28 words
A process according to claim 1, in which gypsum is mixed with said four components in an amount of 0.5 to 20 weight percent based on component (b).
Claim 15
Dependent Claim
30 words
A process according to claim 1 in which inorganic fibrous material is mixed with said four components in an amount of 0.5 to 20 weight percent based on component (b).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |