US4632865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer intumescent-ablator endothermic fire retardant compositions
Assignee: Mediavault Inc
•
Filing: 1985-11-13
•
Granted: 1986-12-30
•
Expires: 2005-11-13
Abstract
Abstract Intumescent-ablator fire retardant materials, in the form of multi-layers, is described. These materials are used for fire-retardant and heat protective purposes.
Inventors
- 👤 Avi Tzur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:06
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/18; B32B5/00; B32B5/18; B32B15/00; B32B15/04; B32B15/046; C; C04; C04B; C04B22/00; C04B22/0066; C04B22/08; C04B22/14; C04B22/142; E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; B32B2260/00; B32B2260/02; B32B2260/04; B32B2307/00; B32B2307/30; B32B2307/304; B32B2307/306; B32B2307/3065; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
104 words
An insulation material for use in heat protective devices which comprises a structure having two or more layers, arranged so that the external layer has a higher melting temperature or temperature of dehydration than any layer, said external layer comprising: an inorganic salt selected from the group consisting of Al 2 (SO 4 ) 3 .16-18H 2 O, AlNH 4 (SO 4 ) 2 .24H 2 O, KAl(SO 4 ) 2 .12H 2 O, and MgSO 4 .7H 2 O, and, a binder selected from the group consisting of natural rubber, neoprene rubber, silicone rubber, polyester resin, epoxy resin, phenolic resin and hydraulic cement.
Claim 2
Dependent Claim
104 words
An insulation material for use in heat protective devices which comprises a structure having two or more layers, arranged so that the external layer has a higher melting temperature or temperature of dehydration than any layer, said external layer comprising: an inorganic salt selected from the group consisting of Al 2 (SO 4 ) 3 .16-18H 2 O, AlNH 4 (SO 4 ) 2 .24H 2 O, KAl(SO 4 ) 2 .12H 2 O, and MgSO 4 .7H 2 O, and, a binder selected from the group consisting of natural rubber, neoprene rubber, silicone rubber, polyester resin, epoxy resin, phenolic resin and hydraulic cement.
Claim 3
Dependent Claim
33 words
An insulation material according to claim 1 wherein the inorganic salt is present in an amount of from 25-80% by weight and the binder is present in an amount of 20-80% by weight.
Claim 4
Dependent Claim
19 words
An insulation material according to claim 2 wherein cork, in the amount of 10-80% by weight, is incorporated therein.
Claim 5
Dependent Claim
26 words
An insulation material according to claim 2 wherein a blowing agent is included therein in an amount of 5-100 parts per 100 parts of the binder.
Claim 6
Dependent Claim
26 words
An insulation material according to claim 3 wherein a blowing agent is included therein in an amount of 5-100 parts per 100 parts of the binder.
Claim 7
Dependent Claim
56 words
An insulation material according to claim 2 for use in a safe or other structures having a door and a frame wherein the insulation material is arrayed in order to seal any space between the door and frame in the presence of a heat source to avoid penetration of a cooling agent, such as sprayed water.
Claim 8
Dependent Claim
67 words
An insulation material according to claim 1 wherein the internal layer or layers comprise an inorganic compound selected from the group consisting of Na 2 S.9H 2 O, Fe(NO) 3 .9H 2 O, and Na 2 S 2 O 3 .5H 2 O in a binder selected from the group consisting of natural rubber, neoprene rubber, silicone rubber, polyester resin, epoxy resin, phenolic resin and hydraulic cement.
Claim 9
Dependent Claim
36 words
An insulation material according to claim 7 wherein, in the internal layer, the inorganic compound is present in an amount of 20-80% by weight and the binder is present in an amount of 20-80% by weight.
Claim 10
Dependent Claim
13 words
An insulation material according to claim 4 wherein the blowing agent is azodicarbonamide.
Claim 11
Dependent Claim
17 words
An insulation material according to claim 2 wherein the external layer also comprises one or more additives.
Claim 12
Dependent Claim
40 words
A heat insulation material according to claim 2 wherein the external layer comprises 74-80% by weight of the inorganic salt, 16-18% by weight of the binder 2-6% by weight of a blowing agent and about 2% by weight of additives.
Claim 13
Dependent Claim
47 words
An insulation material according to claim 3 wherein the external layer comprises 15-58% by weight of the inorganic salt, 20-59% by weight of cork, about 18% by weight of natural rubber, 2 to 6% by weight of a blowing agent and about 2% by weight of additives.
Claim 14
Dependent Claim
44 words
An insulation material according to claim 3 wherein the external layer comprises 5 to 55% by weight of cork, 30 to 40% by weight of resin or hydraulic cement (50% by weight in water) and 2 to 15% by weight of a blowing agent.
Claim 15
Dependent Claim
30 words
An insulation material according to claim 7 wherein the internal layer comprises 50 to 70% by weight of the inorganic salt and 30 to 50% by weight of the binder.
Claim 16
Dependent Claim
36 words
An insulation material according to claim 1 wherein, in addition to an external and internal layer, a middle layer, selected from the group consisting of rigid polyurethane, flexible polyurethane, phenolformaldehyde, styrofoam and foam cement is present.
Claim 17
Dependent Claim
37 words
An insulation material according to claim 3 wherein, in addition to an external and internal layer, a middle layer, selected from the group consisting of rigid polyurethane, flexible polyurethane, phenol formaldehyde, styrofoam and foam cement is present.
Claim 18
Dependent Claim
37 words
An insulation material according to claim 4, wherein, in addition to an external and internal layer, a middle layer, selected from the group consisting of rigid polyurethane, flexible polyurethane, phenol formaldehyde, styrofoam and foam cement is present.
Claim 19
Dependent Claim
37 words
An insulation material according to claim 7 wherein, in addition to an external and internal layer, a middle layer, selected from the group consisting of rigid polyurethane, flexible polyurethane, phenol formaldehyde, styrofoam and foam cement is present.
Claim 20
Dependent Claim
21 words
An insulation material according to claim 15 wherein the middle layer is present in a thickness of 10 to 40 mm.
Claim 21
Dependent Claim
21 words
An insulation material according to claim 16 wherein the middle layer is present in a thickness of 10 to 40 mm.
Claim 22
Dependent Claim
21 words
An insulation material according to claim 17 wherein the middle layer is present in a thickness of 10 to 40 mm.
Claim 23
Dependent Claim
21 words
An insulation material according to claim 18 wherein the middle layer is present in a thickness of 10 to 40 mm.
References Cited (Backward Citations)
US3934066A
Cited
US3991252A
Cited
US4381716A
Cited
US4451312A
Cited
US4324835A
Cited
US4374171A
Cited
US4276332A
Cited
US4310587A
Cited
US4405682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |