US4107376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Granulated fire retardant materials
Assignee: Individual
•
Filing: 1976-05-27
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Granted: 1978-08-15
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Expires: 1996-05-27
Abstract
Abstract The invention provides a heat-resistant composite comprising a noncombustible porous core material (e.g., a calcined mineral such as perlite, etc.) which has been impregnated or coated with an inorganic filler material (e.g., sodium metaborate, sodium meta silicate, sodium metaphosphate, etc.) capable of foaming spontaneously when heated at an elevated temperature. The composite may be incorporated in a molded synthetic resin (e.g., polyurethane) to obtain a flame and heat-resistant molded article in the form of a panel useful as a building material, which, in turn, may be sandwiched between a facing material (e.g., a steel plate, plywood, etc.) and a backing material (e.g., aluminum foil, asbestos paper, etc.) to form a heat-resistant structure which is also useful as a building material. The composite may also be formed by mixing and pelletizing at least one organic filler material with a clay (e.g., kaolin, bentonite, etc.) and incorporating this composite into a synthetic resin panel to obtain a flame and heat-resistant panel also suitable as a building material.
Inventors
- 👤 Takashi Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:55
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; C; C04; C04B; C04B20/00; C04B20/10; C04B20/1055; B32B13/00; B32B13/04; B32B13/12; B32B15/00; B32B15/04; B32B15/046; B32B15/08; B32B15/095; B32B15/18; B32B15/20; B32B21/00; B32B21/04; B32B21/08; B32B7/00; B32B7/04; B32B7/12; B32B9/00; B32B9/002; B32B9/04; B32B9/045; C08; C08K; C08K3/00; C08K3/01; C08K3/016; C08K9/00; C08K9/12; C09; C09C; C09C3/00; C09C3/06; C09C3/063; C09K; C09K21/00; C09K21/02; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2305/00; B32B2305/02; B32B2305/026; B32B2307/00; B32B2307/30; B32B2307/306; B32B2311/00; B32B2311/24; B32B2311/30; B32B2315/00; B32B2315/12; B32B2315/18; B32B2317/00; B32B2317/12; B32B2317/16; B32B2318/00; B32B2318/04; B32B2375/00; B32B2607/00; C01; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/50; C01P2004/60; C01P2004/80; C01P2006/00; C01P2006/32; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249954; Y10T428/249986; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2998
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
33 words
A heat-resistant composite in the form of a solid sphere comprising a noncombustible porous core material impregnated or coated with an inorganic material capable of foaming spontaneously when heated at an elevated temperature.
Claim 2
Dependent Claim
33 words
A heat-resistant composite in the form of a solid sphere comprising a noncombustible porous core material impregnated or coated with an inorganic material capable of foaming spontaneously when heated at an elevated temperature.
Claim 3
Dependent Claim
16 words
The heat-resistant composite of claim 1 encapsulated in an impermeable coating over the entire surface thereof.
Claim 4
Dependent Claim
32 words
A heat-resistant material in the form of a molded article comprising a synthetic resin in the form of a molded article having incorporated therein the composite of claim 1 as an aggregate.
Claim 5
Dependent Claim
13 words
The heat-resistant material of claim 3 wherein the molded article is a panel.
Claim 6
Dependent Claim
28 words
The heat-resistant composite of claim 1 wherein the inorganic material is a member selected from the group consisting of a borate, a silicate, a phosphate, and mixtures thereof.
Claim 7
Dependent Claim
22 words
The heat-resistant material of claim 5 wherein the borate is a member selected from the group consisting of borax and sodium metaborate.
Claim 8
Dependent Claim
23 words
The heat-resistant material of claim 5 wherein the silicate is a member selected from the group consisting of sodium silicate and sodium metasilicate.
Claim 9
Dependent Claim
24 words
The heat-resistant composite of claim 5 wherein the phosphate is a member selected from the group consisting of secondary sodium phosphate and sodium metaphosphate.
Claim 10
Dependent Claim
30 words
The heat-resistant composite of claim 1 wherein the porous core material is a particulate light-weight material selected from the group consisting of calcined perlite, calcined volcanic ash, and calcined vermiculite.
Claim 11
Dependent Claim
28 words
The heat-resistant composite of claim 1 wherein the porous core material is a particulate material selected from the group consisting of artificial stone, sponge, and synthetic resin beads.
Claim 12
Dependent Claim
20 words
The heat-resistant composite of claim 1 wherein the porous core material is perlite and the inorganic material is sodium metaborate.
Claim 13
Dependent Claim
21 words
The heat-resistant composite of claim 11 wherein the surface of the porous core material is covered with a thin impermeable film.
Claim 14
Dependent Claim
27 words
A flame and heat-resistant panel comprising polyurethane foam molded in the form of a panel and having incorporated therein the composite of claim 2 as an aggregate.
Claim 15
Dependent Claim
20 words
A flame and heat-resistant structure comprising the panel of claim 13 sandwiched between a facing material and a backing material.
Claim 16
Dependent Claim
30 words
The flame and heat-resistant structure of claim 14 wherein the facing material is a member selected from the group consisting of a steel plate, plywood, plaster board, and asbestos board.
Claim 17
Dependent Claim
29 words
The flame and heat-resistant structure of claim 14 wherein the backing material is a member selected from the group consisting of backing paper, aluminum foil, tarfelt, and asbestos paper.
Claim 18
Dependent Claim
49 words
The heat-resistant composite of claim 11 wherein the sodium metaborate has the general formula x Na.sub.2 O. yB.sub.2 O.sub.3. zH.sub.2 O in which the values of x, y, and z are in the following range: 0.25 ≦ x/y ≦ 1.5 and 0.8 (x+y) ≦ z ≦ 5 (x+y). 18.
Claim 19
Dependent Claim
34 words
The heat-resistant composite of claim 1 which comprises a pelletized and calcined mixture of clay and a member selected from the group consisting of plaster, sodium carbonate, and perlite powder as the core material.
Claim 20
Dependent Claim
36 words
The heat-resistant composite of claim 18 wherein the inorganic material capable of foaming spontaneously when heated at an elevated temperature is a member selected from the group consisting of a borate, a phosphate, and a silicate.
Claim 21
Dependent Claim
21 words
The heat-resistant composite of claim 18 wherein the clay is a member selected from the group consisting of kaolin and bentonite.
Claim 22
Dependent Claim
27 words
A flame and heat-resistant panel for building comprising a molded panel of a synthetic resin having incorporated therein the heat-resistant composite of claim 18 as an aggregate.
Claim 23
Dependent Claim
27 words
A flame and heat-resistant panel for building comprising a molded panel of a synthetic resin having incorporated therein the heat-resistant composite of claim 19 as an aggregate.
Claim 24
Dependent Claim
27 words
A flame and heat-resistant panel for building comprising a molded panel of a synthetic resin having incorporated therein the heat-resistant composite of claim 20 as an aggregate.
Claim 25
Dependent Claim
12 words
The heat-resistant material of claim 3 wherein the synthetic resin is combustible.
Claim 26
Dependent Claim
13 words
The heat-resistant material of claim 21 wherein the combustible synthetic resin is polyurethane.
References Cited (Backward Citations)
US3147177A
Cited
US3515624A
Cited
US3778304A
Cited
US3904539A
Cited
US3934066A
Cited
US3974318A
Cited
US4024310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-14 | 1982-02-13 | 1982-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-14 | 1986-02-13 | 1986-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-14 | 1990-02-13 | 1990-08-15 | $7700.00 | Window Closed / Lapsed |