US5126076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-flammability structural elements, particularly boards, and process for constructing them
Assignee: CHEMISCHE FABRIK GRUENAU A CORP OF FED REP OF GERMANY
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Filing: 1989-07-07
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Granted: 1992-06-30
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Expires: 2009-07-07
Abstract
Abstract The invention relates to low-flammability structural elements, particularly boards, and to a process for constructing them. The low-flammability structural elements are constructed utilizing combustible plastics waste material. They contain in addition non-combustible inorganic additives and a flame-proofing agent mixture. The components are held together by at least one hardened adhesive. Because of this build-up the structural elements display, despite the combustible components, low-flammability.
Inventors
- 👤 Robert Graf
- 👤 Dieter Annemaier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:34
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/06; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10S52/00; Y10S52/09; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31993; Y10T442/00; Y10T442/60; Y10T442/699
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
178 words
A low-flammability structural element comprising a compressed mixture of (a) about 5 to about 50% by weight of an inherently-combustible organic material in the form of particles having a planar elongation of from about 1 to about 20 mm and a thickness of from about 0.01 to about 4 mm, (b) about 75 to about 20% by weight of a non-combustible inorganic filler selected from the group consisting of inorganic fibres and inorganic lightweight materials, (c) about 4 to about 40% by weight of a water-insoluble, flame-proofing agent mixture consisting of a carbonizing component and a gas-emitting component, (d) about 3 to about 25% by weight of a hardened adhesive binding together components (a), (b) and (c), wherein said components (a) and (b) are present as a heterogeneous mixture in a spatial arrangement of between about 1 mm 2 and about 100 mm 2 , and the particles of said component (a) are arranged spatially separated from each other in said structural element with said component (b) and said component (c) located between said particles of component (a).
Claim 2
Dependent Claim
178 words
A low-flammability structural element comprising a compressed mixture of (a) about 5 to about 50% by weight of an inherently-combustible organic material in the form of particles having a planar elongation of from about 1 to about 20 mm and a thickness of from about 0.01 to about 4 mm, (b) about 75 to about 20% by weight of a non-combustible inorganic filler selected from the group consisting of inorganic fibres and inorganic lightweight materials, (c) about 4 to about 40% by weight of a water-insoluble, flame-proofing agent mixture consisting of a carbonizing component and a gas-emitting component, (d) about 3 to about 25% by weight of a hardened adhesive binding together components (a), (b) and (c), wherein said components (a) and (b) are present as a heterogeneous mixture in a spatial arrangement of between about 1 mm 2 and about 100 mm 2 , and the particles of said component (a) are arranged spatially separated from each other in said structural element with said component (b) and said component (c) located between said particles of component (a).
Claim 3
Dependent Claim
14 words
A low-flammability structural element as in claim 1 in the form of a board.
Claim 4
Dependent Claim
17 words
A low-flammability structural element as in claim 1 wherein said component (a) comprises a plastics waste material.
Claim 5
Dependent Claim
42 words
A low-flammability structural element as in claim 1 wherein said component (a) is present in the form of particles having a planar elongation of from about 2 to about 15 mm and a thickness of from about 0.5 to about 2 mm.
Claim 6
Dependent Claim
31 words
A low-flammability structural element as in claim 1 wherein said component (a) is present in the form of small pieces of non-woven fabrics, fibre balls, film chips or plastic foam pieces.
Claim 7
Dependent Claim
14 words
A low-flammability structural element as in claim 1 wherein said structural element is rigid.
Claim 8
Dependent Claim
20 words
A low-flammability structural element as in claim 1 having a compressive strength of more than about 2 N/mm 2 .
Claim 9
Dependent Claim
33 words
A low-flammability structural element as in claim 1 wherein said component (b) inorganic fibres are present in a weight ratio of from about 2:1 to about 4:1 with respect to non-fibrous inorganic filler.
Claim 10
Dependent Claim
19 words
A low-flammability structural element as in claim 1 wherein said component (b) inorganic lightweight materials are of mineral origin.
Claim 11
Dependent Claim
18 words
A low-flammability structural element as in claim 1 wherein said component (c) carbonizing component comprises a phosphate compound.
Claim 12
Dependent Claim
26 words
A low-flammability structural element as in claim 1 wherein said component (c) gas-emitting component comprises at least two gas-emitting components which are activated at different temperatures.
Claim 13
Dependent Claim
27 words
A low-flammability structural element as in claim 1 wherein aid component (c) gas-emitting component is selected from the group consisting of a hydroxide and a carbonate compound.
Claim 14
Dependent Claim
23 words
A low-flammability structural element as in claim 12 wherein said hydroxide is selected from the group consisting of aluminum hydroxide and magnesium hydroxide.
Claim 15
Dependent Claim
23 words
A low-flammability structural element as in claim 1 which is free of aliphatic and aromatic halogen compounds, antimony salts, and heavy metal compounds.
Claim 16
Dependent Claim
18 words
A low-flammability structural element as in claim 1 wherein said components (a), (b), (c) and (d) are water-insoluble.
Claim 17
Dependent Claim
38 words
A process for preparing a structural element according to claim 20 comprising gently mixing together said components (a), (b), (c) and (d), compressing the mixture to a desired density, and maintaining the compression until the adhesive is hardened.
Claim 18
Dependent Claim
40 words
A process according to claim 16 including adding said component (a) in the form of small pieces, and mixing the mixture in a manner so that said components (a), (b), (c) and (d) are not significantly further reduced in size.
Claim 19
Dependent Claim
20 words
A process according to claim 16 wherein said components (a), (b), (c) and (d) are mixed in a dry state.
Claim 20
Dependent Claim
15 words
A process according to claim 16 including adding said component (d) in a finely-dispersed form.
Claim 21
Dependent Claim
37 words
A process according to claim 16 wherein said inorganic fibres are added in the form of balls or flocks, and the size of said balls or flocks corresponds approximately to the particle size of said component (a).
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) | 1995-06-30 | 1995-12-30 | 1996-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-30 | 1999-12-30 | 2000-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-30 | 2003-12-30 | 2004-06-30 | $7700.00 | Window Closed / Lapsed |