US4146402A
Expired / Lapsed
US
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Process of producing fiber-reinforced hardened body of gypsum system
Assignee: Mitsubishi Mining and Cement Co Ltd
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Filing: 1978-03-13
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Granted: 1979-03-27
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Expires: 1998-03-13
Abstract
Abstract A process for producing a fiber-reinforced hardened body comprising mixing gypsum and slag in a ratio by weight of the former to the latter between 3:7 and 7:3 to prepare a main starting material, adding to the main starting material 1 - 30% by weight of reinforcing fiber, 0.1 - 5% by weight of alkali salt substance and 0.1 - 5% by weight of aluminum sulfate-containing substance, the respective amounts being based on the weight of the main starting material, further adding water to knead and mold the resulting starting material mixture, and curing the molded starting material mixture under normal condition or steam-curing the molded starting material mixture at 90° C. or below.
Inventors
- 👤 Kinichi Kira
- 👤 Yoshio Makino
- 👤 Tadashi Matumoto
- 👤 Yoshihiko Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:12
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/08
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
135 words
A process of producing a fiber-reinforced hardened body of gypsum system which comprises mixing gypsum (CaSO 4 .2H 2 O) and slag having a specific surface area of at least 3000 cm 2 /g in a ratio by weight of the former to the latter between 3:7 and 7:3 to prepare a main starting material, adding to the main starting material 1 - 30% by weight of reinforcing fiber, 0.1 - 5% by weight of alkali salt substance and 0.1 - 5% by weight of aluminum sulfate-containing substance, the respective amounts being based on the weight of the main starting material, further adding water to knead and mold the resulting starting material mixture, and curing the molded starting material mixture under normal conditions or steam-curing the molded starting material mixture at 90° C. or below.
Claim 2
Dependent Claim
135 words
A process of producing a fiber-reinforced hardened body of gypsum system which comprises mixing gypsum (CaSO 4 .2H 2 O) and slag having a specific surface area of at least 3000 cm 2 /g in a ratio by weight of the former to the latter between 3:7 and 7:3 to prepare a main starting material, adding to the main starting material 1 - 30% by weight of reinforcing fiber, 0.1 - 5% by weight of alkali salt substance and 0.1 - 5% by weight of aluminum sulfate-containing substance, the respective amounts being based on the weight of the main starting material, further adding water to knead and mold the resulting starting material mixture, and curing the molded starting material mixture under normal conditions or steam-curing the molded starting material mixture at 90° C. or below.
Claim 3
Dependent Claim
32 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 1 in which the alkali salt substance is selected from alkali metal salt and alkaline earth metal salt.
Claim 4
Dependent Claim
32 words
A process of producing a fiber-reinforced hardened body according to claim 1 in which the alkali salt substance is selected from sodium sulfate, potassium sulfate, caustic soda, caustic potash and slaked lime.
Claim 5
Dependent Claim
34 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 1 in which the aluminum sulfate-containing substance is selected from aluminum sulfate, anhydrous aluminum sulfate, sodium alum and potassium alum.
Claim 6
Dependent Claim
28 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 1 in which the reinforcing fiber is selected from inorganic fiber and organic fiber.
Claim 7
Dependent Claim
39 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 1 in which the reinforcing fiber is selected from asbestos, rock wool, glass fiber, steel fiber, carbon fiber, polypropylene fiber, nylon fiber and pulp fiber.
Claim 8
Dependent Claim
126 words
A process of producing a fiber-reinforced hardened body of gypsum system which comprises mixing gypsum and slag in a ratio by weight of the former to the latter between 3:7 and 7:3 to prepare a main starting material, adding to the main starting material 1 - 30% by weight of reinforcing fiber, 1 - 25% by weight of light-weight material, 0.1 - 5% by weight of alkali salt substance and 0.1 - 5% by weight of aluminum sulfate-containing substance, the respective amounts being based on the weight of the main starting material, adding further water to knead and mold the resulting starting material mixture, and curing the molded starting material mixture under normal condition of steam-curing the molded starting material mixture at 90° C. or below.
Claim 9
Dependent Claim
126 words
A process of producing a fiber-reinforced hardened body of gypsum system which comprises mixing gypsum and slag in a ratio by weight of the former to the latter between 3:7 and 7:3 to prepare a main starting material, adding to the main starting material 1 - 30% by weight of reinforcing fiber, 1 - 25% by weight of light-weight material, 0.1 - 5% by weight of alkali salt substance and 0.1 - 5% by weight of aluminum sulfate-containing substance, the respective amounts being based on the weight of the main starting material, adding further water to knead and mold the resulting starting material mixture, and curing the molded starting material mixture under normal condition of steam-curing the molded starting material mixture at 90° C. or below.
Claim 10
Dependent Claim
31 words
A process of producing a fiber-reinforced hardened body of gypsum according to claim 7 in which the alkali salt substance is selected from alkali metal salt and alkaline earth metal salt.
Claim 11
Dependent Claim
32 words
A process of producing a fiber-reinforced hardened body according to claim 7 in which the alkali salt substance is selected from sodium sulfate, potassium sulfate, caustic soda, caustic potash and slaked lime.
Claim 12
Dependent Claim
34 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 7 in which the aluminum sulfate-containing substance is selected from aluminum sulfate, anhydrous aluminum sulfate, sodium alum and potassium alum.
Claim 13
Dependent Claim
28 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 7 in which the reinforcing fiber is selected from inorganic fiber and organic fiber.
Claim 14
Dependent Claim
39 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 7 in which the reinforcing fiber is selected from asbestos, rock wool, glass fiber, steel fiber, carbon fiber, polypropylene fiber, nylon fiber and pulp fiber.
Claim 15
Dependent Claim
30 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 7 in which the light-weight material is selected from inorganic light-weight material and organic light-weight material.
Claim 16
Dependent Claim
43 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 7 in which the light-weight material is selected from perlite, foamable light-weight aggregate, light sand, calcium silicate hydrate, diatomaceous earth, tricalcium sulfoaluminate hydrate, calcined zeolite, shavings and foamed polystyrene.
Claim 17
Dependent Claim
145 words
A process of producing a fiber-reinforced hardened body of gypsum system which comprises mixing gypsum (CaSO 4 . 2H 2 O) and slag having a specific surface area of at least 3000 cm 2 /g in a ratio by weight of the former to the latter between 3:7 and 7:3 to prepare a main starting material, adding to the main starting material 1 - 30% by weight of reinforcing fiber, 0.1 - 5% by weight of alkali salt substance, 0.1 - 5% by weight of aluminum sulfate-containing substance and 0.1 - 5% by weight of fluorinated salt substance, the respective amounts being based on the weight of the main starting material, adding further water to knead and mold the resulting starting material mixture, and curing the molded starting material mixture under normal conditions or steam-curing the molded starting material mixture at 90° C. or below.
Claim 18
Dependent Claim
145 words
A process of producing a fiber-reinforced hardened body of gypsum system which comprises mixing gypsum (CaSO 4 . 2H 2 O) and slag having a specific surface area of at least 3000 cm 2 /g in a ratio by weight of the former to the latter between 3:7 and 7:3 to prepare a main starting material, adding to the main starting material 1 - 30% by weight of reinforcing fiber, 0.1 - 5% by weight of alkali salt substance, 0.1 - 5% by weight of aluminum sulfate-containing substance and 0.1 - 5% by weight of fluorinated salt substance, the respective amounts being based on the weight of the main starting material, adding further water to knead and mold the resulting starting material mixture, and curing the molded starting material mixture under normal conditions or steam-curing the molded starting material mixture at 90° C. or below.
Claim 19
Dependent Claim
32 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 15 in which the alkali salt substance is selected from alkali metal salt and alkaline earth metal salt.
Claim 20
Dependent Claim
32 words
A process of producing a fiber-reinforced hardened body according to claim 15 in which the alkali salt substance is selected from sodium sulfate, potassium sulfate, caustic soda, caustic potash and slaked lime.
Claim 21
Dependent Claim
34 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 15 in which the aluminum sulfate-containing substance is selected from aluminum sulfate, anhydrous aluminum sulfate, sodium alum and potassium alum.
Claim 22
Dependent Claim
28 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 15 in which the reinforcing fiber is selected from inorganic fiber and organic fiber.
Claim 23
Dependent Claim
39 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 15 in which the reinforcing fiber is selected from asbestos, rock wool, glass fiber, steel fiber, carbon fiber, polypropylene fiber, nylon fiber and pulp fiber.
Claim 24
Dependent Claim
33 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 15 in which the fluorinated salt substance is selected from sodium fluoride, potassium fluoride, sodium silicofluoride and potassium silicofluoride.
Claim 25
Dependent Claim
153 words
A process of producing a fiber-reinforced hardened body of gypsum system which comprises mixing gypsum (CaSO 4 . 2H 2 O) and slag having a specific surface area of at least 3000 cm 2 /g in a ratio by weight of the former to the latter between 3:7 and 7:3 to prepare a main starting material, adding to the main starting material 1 - 30% by weight of reinforcing fiber, 1 - 25% by weight of light-weight material, 0.1 - 5% by weight of alkali salt substance, 0.1 - 5% by weight of aluminum sulfate-containing substance and 0.1 - 5% by weight of fluorinated salt substance, the respective amounts being based on the weight of the main starting material, adding further water to knead and mold the resulting starting material mixture, and curing the molded starting material mixture under normal conditions or steam-curing the molded starting material mixture at 90° C. or below.
Claim 26
Dependent Claim
153 words
A process of producing a fiber-reinforced hardened body of gypsum system which comprises mixing gypsum (CaSO 4 . 2H 2 O) and slag having a specific surface area of at least 3000 cm 2 /g in a ratio by weight of the former to the latter between 3:7 and 7:3 to prepare a main starting material, adding to the main starting material 1 - 30% by weight of reinforcing fiber, 1 - 25% by weight of light-weight material, 0.1 - 5% by weight of alkali salt substance, 0.1 - 5% by weight of aluminum sulfate-containing substance and 0.1 - 5% by weight of fluorinated salt substance, the respective amounts being based on the weight of the main starting material, adding further water to knead and mold the resulting starting material mixture, and curing the molded starting material mixture under normal conditions or steam-curing the molded starting material mixture at 90° C. or below.
Claim 27
Dependent Claim
32 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 22 in which the alkali salt substance is selected from alkali metal salt and alkaline earth metal salt.
Claim 28
Dependent Claim
32 words
A process of producing a fiber-reinforced hardened body according to claim 22 in which the alkali salt substance is selected from sodium sulfate, potassium sulfate, caustic soda, caustic potash and slaked lime.
Claim 29
Dependent Claim
34 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 22 in which the aluminum sulfate-containing substance is selected from aluminum sulfate, anhydrous aluminum sulfate, sodium alum and potassium alum.
Claim 30
Dependent Claim
28 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 22 in which the reinforcing fiber is selected from inorganic fiber and organic fiber.
Claim 31
Dependent Claim
39 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 22 in which the reinforcing fiber is selected from asbestos, rock wool, glass fiber, steel fiber, carbon fiber, polypropylene fiber, nylon fiber and pulp fiber.
Claim 32
Dependent Claim
30 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 22 in which the light-weight material is selected from inorganic light-weight material and organic light-weight material.
Claim 33
Dependent Claim
43 words
A process of producing a fiber-reinforced hardened body of gypsum system according to claim 22 in which the light-weight material is selected from perlite, foamable light-weight aggregate, light sand, calcium silicate hydrate, diatomaceous earth, tricalcium sulfoaluminate hydrate, calcined zeolite, shavings and foamed polystyrene.
Claim 34
Dependent Claim
12 words
A fiber-reinforced hardened body produced according to the process of claim 1.
Claim 35
Dependent Claim
12 words
A fiber-reinforced hardened body produced according to the process of claim 7.
Claim 36
Dependent Claim
12 words
A fiber-reinforced hardened body produced according to the process of claim 15.
Claim 37
Dependent Claim
12 words
A fiber-reinforced hardened body produced according to the process of claim 22.
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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |