GB2284218A - Fire-resistant gap seal - Google Patents

Fire-resistant gap seal Download PDF

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Publication number
GB2284218A
GB2284218A GB9324344A GB9324344A GB2284218A GB 2284218 A GB2284218 A GB 2284218A GB 9324344 A GB9324344 A GB 9324344A GB 9324344 A GB9324344 A GB 9324344A GB 2284218 A GB2284218 A GB 2284218A
Authority
GB
United Kingdom
Prior art keywords
seal
seal according
fire
gap
composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9324344A
Other versions
GB9324344D0 (en
GB2284218B (en
Inventor
Arasapillai Nadaraja Ganendran
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BTR PLC
Original Assignee
BTR PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BTR PLC filed Critical BTR PLC
Priority to GB9324344A priority Critical patent/GB2284218B/en
Publication of GB9324344D0 publication Critical patent/GB9324344D0/en
Priority to DE69408338T priority patent/DE69408338D1/en
Priority to PCT/GB1994/002588 priority patent/WO1995014828A1/en
Priority to EP95902841A priority patent/EP0730695B1/en
Priority to AU11938/95A priority patent/AU1193895A/en
Publication of GB2284218A publication Critical patent/GB2284218A/en
Application granted granted Critical
Publication of GB2284218B publication Critical patent/GB2284218B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/94Protection against other undesired influences or dangers against fire
    • E04B1/948Fire-proof sealings or joints

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Sealing Material Composition (AREA)
  • Fireproofing Substances (AREA)

Abstract

Seal for a gap between structural elements such as between panels in building structures, the seal being in tubular form which is flexible and resiliently radially compressible and which provides a fire-resistant barrier in fire conditions, and being based on a composition comprising elastomeric material and intumescent material in major proportions. A fire-retardant, e.g. alumina trihydrate, and a fusible binder, such as glass particles, may be present.

Description

GAP SEAL This invention relates to gap seals, especially to seals for gaps between structural elements such as panels in building structures.
Gaps at the junction of structural panels, such as walls, ceilings and floors of buildings, frequently are provided to allow for small movements between the panels.
The present invention provides a seal or joint for installation in such gaps, and which accommodates variation in the size of the gap and changes in the gap size resulting from movement of the panels, for instance by expansion or contraction or lateral movement of one or more adjoining panels. Such seals are sometimes referred to as expansion joints.
The seal or joint of this invention also provides a fire-resistant barrier seal which additionally may confer thermal and/or acoustic and/or moisture insulation.
The seal of the invention has a tubular form. It is flexible and is resiliently radially compressible.
The tube may be produced in long lengths, for example by extrusion, for cutting to lengths required for the gap to be sealed.
The seal is based on a composition comprising elastomeric material and intumescent material.
Preferred additional ingredients include a fire-retardant agent and/or a fusible inorganic binder.
Other suitable ingredients include a reinforcing filler and/or a lightweight filler.
One or more additional ingredients, such as those known for use in elastomeric compositions, may also be present.
If desired, the seal may comprise a laminate of the composition with one or more layers of other material.
The elastomeric material provides a binder for the other composition ingredients. Suitably, it may be a synthetic rubber. Preferably it is curable at a temperature lower than that at which the intumescent material commences to intumesce. A preferred elastomeric material is epdm.
A suitable intumescent material is expandable graphite material. Such material usually comprises chemically-treated graphite which commences to expand by several times its original volume, e g 100-200 times, when heated above a critical temperature, e g about 190 C. Examples of expandable graphite materials are those available under the trade name 'CALLOTEK', for instance 'CALLOTEK 100' or 'CALLOTEK 500'.
Preferably, the composition contains a high proportion of intumescent material. For instance, the ratio of intumescent material to elastomeric material may be at least 1:1 by weight.
The fire-retardant agent suitably is an ablative material. A preferred fire-retardant agent is alumina trihydrate. It is found that alumina trihydrate also enables an increase in the temperature employed for curing the elastomeric material in the composition without premature activation of the intumescent material.
The fusible inorganic binder is a material which is capable of melting and resolidifying at elevated temperatures such as fire temperatures. A preferred fusible material comprises glass particles. Preferably the fusible material comprises a mixture of particles having different melting points, suitably commencing at about 2000 C. Such a particle mixture may melt progressively over a temperature range of about 2000C to 900 C, for instance about 3500C to 7000 C. The material then resolidifies above the melting temperature. For instance, resolidification may commence at a temperature above about 7000 C or above about 9000 C to form a crystalline solid. In doing so, it acts as a binder for maintenance of stability of the seal in fire conditions.Examples of suitable fusible glass particles are those available under the trade name "Ceepree" ex ICI/Brunner Mond & Company.
A suitable reinforcing filler for the composition is carbon black.
A suitable light-weight filler may be, for instance, hollow microspheres such as polymeric microballoons. The polymeric microballoons preferably are of a resilient material, for example epdm.
Suitable resilient microballoons are those obtainable under the trade name 'EXPANCEL'.
Other ingredients may be selected from, for example, curatives, accelerators, processing aids, anti-ageing agents, fungicides, pigments, fibre reinforcements, etc.
By way of example only, a composition suitable for a seal or joint according to the invention may have the following formulation: Ingredients Parts by weight Elastomer (epdm) 100 Intumescent agent (expandable graphite) 100-200 Fire-retardant agent (alumina trihydrate) 20 Fusible inorganic particles ('Ceepree') 10 Filler (carbon black) 30 Light-weight filler ('EXPANCEL') 10 Other ingredient(s) 5 The composition ingredients may be blended by conventional techniques.
The tubular form of the seal may be produced by, for instance, extrusion of the composition.
The composition may be subjected to elastomer-curing conditions in its tubular form. The cure temperature preferably should be below that at which the intumescent material would start to intumesce. An example of a suitable cure temperature is about 150 C.
The seal is suitable for indoor and outdoor applications.
Suitably the external diameter of the seal in its uncompressed state is greater than the width of the gap to be sealed, so that the seal is held in compressed state in the gap. A preferred level of compression of the seal in the gap is at least about 20% of the uncompressed seal diameter.
The wall tubular thickness of the seal preferably should be such that, when the seal is subjected to fire conditions which degrade the elastomeric material, the composition expands intumescently into the hollow of the tube and across the gap to maintain or increase the barrier effect of the seal, and thereby prevents traverse of flame, smoke and other hazardous fire products.
The ratio of the tubular wall thickness to the uncompressed seal external diameter may be in the range of, for instance, 0.08:1 to 0.5:1.
Preferably the ratio is at least about 0.1:1.
By way of example only, dimensions and corresponding compressions of the seal are given below, in which: W = gap width; CD = compressed external diameter of the seal along the depth of the gap; UD = external diameter of the seal in its normal uncompressed state; C = compression of the seal widthwise of the gap.
CD:W W: UD Compression (%) 1:1 0.785:1 21.5 2:1 0.523:1 47.7 3:1 0.393:1 60.7 4:1 0.314:1 68.6 5:1 0.262:1 73.8 15:1 0.098:1 90.2

Claims (14)

  1. CLAIMS: 1. Seal for a gap between structural elements such as between panels in building structures, said seal being in tubular form which is flexible and resiliently radially compressible and which provides a fire-resistant barrier in fire conditions, the tubular seal being based on a composition comprising elastomeric material and intumescent material in major proportions.
  2. 2. Seal according to Claim 1 wherein the intumescent material comprises expandable graphite.
  3. 3. Seal according to Claim 1 or 2 wherein the ratio of intumescent material to elastomeric material is at least 1:1 by weight.
  4. 4. Seal according to any of the preceding Claims wherein the elastomeric material comprises epdm.
  5. 5. Seal according to any of the preceding Claims wherein the composition comprises also a fire-retardant agent.
  6. 6. Seal according to Claim 5 wherein the fire-retardant agent comprises alumina trihydrate.
  7. 7. Seal according to any of the preceding Claims wherein the composition comprises also a fusible inorganic binder being a material which is capable of melting and re-solidifying at normal fire temperatures.
  8. 8. Seal according to Claim 7 wherein the fusible inorganic binder comprises a mixture of glass particles having various melting points.
  9. 9. Seal according to any of the preceding Claims wherein the composition comprises also one or more fillers.
  10. 10. Seal according to any of the preceding Claims having a tubular form produced by extrusion.
  11. 11. Seal according to any of the preceding Claims wherein the ratio of the tubular wall thickness to the external diameter of the seal in its uncompressed state is in the range 0.08:1 to 0.5:1.
  12. 12. Seal according to Claim 11 wherein said ratio is at least 0.1:1.
  13. 13. Seal according to any of the preceding Claims which, when present in a gap as a gap seal between structural elements, is under radial compression by at least about 20% of the uncompressed seal diameter.
  14. 14. Seal according to Claim 1 and substantially as described herein.
GB9324344A 1993-11-26 1993-11-26 Fire-resistant gap seal Expired - Fee Related GB2284218B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB9324344A GB2284218B (en) 1993-11-26 1993-11-26 Fire-resistant gap seal
DE69408338T DE69408338D1 (en) 1993-11-26 1994-11-25 JOINT SEAL
PCT/GB1994/002588 WO1995014828A1 (en) 1993-11-26 1994-11-25 Gap seal
EP95902841A EP0730695B1 (en) 1993-11-26 1994-11-25 Gap seal
AU11938/95A AU1193895A (en) 1993-11-26 1994-11-25 Gap seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9324344A GB2284218B (en) 1993-11-26 1993-11-26 Fire-resistant gap seal

Publications (3)

Publication Number Publication Date
GB9324344D0 GB9324344D0 (en) 1994-01-12
GB2284218A true GB2284218A (en) 1995-05-31
GB2284218B GB2284218B (en) 1997-06-04

Family

ID=10745751

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9324344A Expired - Fee Related GB2284218B (en) 1993-11-26 1993-11-26 Fire-resistant gap seal

Country Status (5)

Country Link
EP (1) EP0730695B1 (en)
AU (1) AU1193895A (en)
DE (1) DE69408338D1 (en)
GB (1) GB2284218B (en)
WO (1) WO1995014828A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101275036B (en) * 2007-03-28 2011-04-20 南京理工大学 Preparation for polymer conductive nanometer compound material
US11486150B2 (en) 2016-12-20 2022-11-01 Clarkwestern Dietrich Building Systems Llc Finishing accessory with backing strip
US11885138B2 (en) 2020-11-12 2024-01-30 Clarkwestern Dietrich Building Systems Llc Control joint
USD1026252S1 (en) 2020-11-12 2024-05-07 Clarkwestern Dietrich Building Systems Llc Control joint

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6572948B1 (en) 2000-10-31 2003-06-03 3M Innovative Properties Company Fire stop device with rupturable element
EP2072703B1 (en) 2007-12-20 2010-10-27 Felix Schuh & Co. GmbH Sealing for a joint and joint
DE102010047772A1 (en) * 2010-10-08 2012-04-12 Phoenix Dichtungstechnik Gmbh Sealing or damping profile

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566541A (en) * 1969-03-06 1971-03-02 Rixson Inc Protective barrier for products of combustion
DE2503712A1 (en) * 1975-01-30 1976-08-05 Bayer Ag FIRE PROTECTION SEALING ELEMENTS
DE3404221A1 (en) * 1984-02-07 1985-08-08 Lentia GmbH Chem. u. pharm. Erzeugnisse - Industriebedarf, 8000 München METHOD FOR SEALING OPENINGS IN COMPONENTS IN THE EVENT OF FIRE
JPS6270478A (en) * 1985-09-25 1987-03-31 Sumitomo Electric Ind Ltd Fire-retardant rubber packing
DE3735779A1 (en) * 1987-10-22 1989-05-03 Irbit Research & Consulting Ag SEALING ELEMENT
DE3917518A1 (en) * 1989-05-30 1990-12-06 Bayer Ag FIRE PROTECTION ELEMENTS

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101275036B (en) * 2007-03-28 2011-04-20 南京理工大学 Preparation for polymer conductive nanometer compound material
US11486150B2 (en) 2016-12-20 2022-11-01 Clarkwestern Dietrich Building Systems Llc Finishing accessory with backing strip
US11725401B2 (en) 2016-12-20 2023-08-15 Clarkwestern Dietrich Building Systems Llc Finishing accessory with backing strip
US12018496B2 (en) 2016-12-20 2024-06-25 Clarkwestern Dietrich Building Systems Llc Finishing accessory with backing strip
US11885138B2 (en) 2020-11-12 2024-01-30 Clarkwestern Dietrich Building Systems Llc Control joint
USD1026252S1 (en) 2020-11-12 2024-05-07 Clarkwestern Dietrich Building Systems Llc Control joint

Also Published As

Publication number Publication date
EP0730695B1 (en) 1998-01-28
EP0730695A1 (en) 1996-09-11
DE69408338D1 (en) 1998-03-05
GB9324344D0 (en) 1994-01-12
WO1995014828A1 (en) 1995-06-01
AU1193895A (en) 1995-06-13
GB2284218B (en) 1997-06-04

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20011126