EP0258189A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Silicate treated honeycomb structures
Assignee: Novartis AG
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Filing: 1987-08-24
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Granted: —
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Expires: 2007-08-24
Abstract
Abstract A laminate structure comprising a honeycomb core structure and facing sheets bonded thereto, said core being treated with a silicate impregnant/coating to impart improved flame resistance and to reduce heat transmission and toxic emissions upon exposure of said core to direct or indirect heat, flame and/or pyrolytic environment.
Inventors
- 👤 Richard R. Heitkamp
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 16:35
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; B32B29/00; B32B29/02; B32B29/06; B32B7/00; B32B7/04; B32B7/12; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/028; B32B2260/04; B32B2260/046; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
46 words
A honeycomb-laminate composite structure comprising a cellular core and a facing sheet bonded to at least one face of the core, the improvement which provides flame retardant properties thereto comprising a cellular core coated and/or impregnated with an effective fire retarding amount of a sodium silicate.
Claim 2
Dependent Claim
46 words
A honeycomb-laminate composite structure comprising a cellular core and a facing sheet bonded to at least one face of the core, the improvement which provides flame retardant properties thereto comprising a cellular core coated and/or impregnated with an effective fire retarding amount of a sodium silicate.
Claim 3
Dependent Claim
15 words
The composite structure of claim 1, wherein said core is impregnated with a thermosetting resin.
Claim 4
Dependent Claim
17 words
The composite structure of claim 2, wherein said sodium silicate is present as an independent coating layer.
Claim 5
Dependent Claim
20 words
The composite structure of claim 2, wherein dry sodium silicate is present in the resin utilized to impregnate said core.
Claim 6
Dependent Claim
20 words
The composite structure of claim 1, wherein said facing sheet is a fiber reinforced material impregnated with a thermosetting resin.
Claim 7
Dependent Claim
21 words
The composite structure of claim 1, wherein the silicate content is from 20 to 90 % of the final core density.
Claim 8
Dependent Claim
24 words
The composite structure of claim 3, wherein the silicate is present in from about 10 to 100 %, by weight, of the resin coating.
Claim 9
Dependent Claim
24 words
The composite structure of claim 4, wherein the silicate is present in an amount of 15 to 50 %, by weight, of resin solids.
Claim 10
Dependent Claim
26 words
The composite structure of claim 1, wherein a thermosetting, thermoplastic or combined thermosetting - thermoplastic adhesive is utilized to bond the facing sheet to the core.
Claim 11
Dependent Claim
24 words
The composite structure of claim 1, wherein said sodium silicate has a weight ratio of sodium oxide to silica ranging from 1:4 to 1:1.5.
Claim 12
Independent Claim
45 words
A method for imparting fire and smoke retardant properties to a composite structure comprising a cellular core and a facing sheet bonded to at least one face thereof which comprises treating said cellular core with an effective fire and smoke retarding amount of sodium silicate.
Claim 13
Independent Claim
45 words
A method for imparting fire and smoke retardant properties to a composite structure comprising a cellular core and a facing sheet bonded to at least one face thereof which comprises treating said cellular core with an effective fire and smoke retarding amount of sodium silicate.
References Cited (Backward Citations)
No citation records indexed.
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