EP1456324A1 - Molded fire stop and composition therefor - Google Patents

Molded fire stop and composition therefor

Info

Publication number
EP1456324A1
EP1456324A1 EP02742597A EP02742597A EP1456324A1 EP 1456324 A1 EP1456324 A1 EP 1456324A1 EP 02742597 A EP02742597 A EP 02742597A EP 02742597 A EP02742597 A EP 02742597A EP 1456324 A1 EP1456324 A1 EP 1456324A1
Authority
EP
European Patent Office
Prior art keywords
parts
weight
composition
fire
fire stop
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.)
Withdrawn
Application number
EP02742597A
Other languages
German (de)
French (fr)
Inventor
Frank Xing
Brian Didone
Manfred Harle
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.)
ROYAL GROUP Inc
Original Assignee
Royal Group Technologies Ltd
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 Royal Group Technologies Ltd filed Critical Royal Group Technologies Ltd
Publication of EP1456324A1 publication Critical patent/EP1456324A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K21/00—Fireproofing materials
    • C09K21/14—Macromolecular materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59

Definitions

  • TITLE COMPOSITION FOR MOLDED FIRE STOP
  • the present invention relates to a compositionwhich can be molded into a fire and smoke block forpreventing the spread of fire through openings or penetrations in the walls and floors of buildings
  • Fire stop devices are used to prevent fire from spreading from one room to another through the openings or apertures in a partition such as a wall, floor or ceiling through which a pipe passes.
  • the purpose of the fire stop device is to close off the opening in the partition in the event of a fire.
  • the fire stop device generally contains an intumescent material which expands when the temperature reaches a certain level . The expansion of the intumescent material closes off the opening in the wall with a hard char.
  • a number of fire stop devices have been proposed requiring field installation whereby for example foil lined strips of intumescent material are wrapped around a plate and then a restraining collar is wrapped around the intumescent material and secured by screws or straps.
  • Examples of many such fire stops are provided in amongst others U.S. patent 5,498 466, 5,953,872, 5,634,304, 5,390,465, and 5,076,309.
  • the installation of such fire stop devices can be labor-intensive and requires that they be properly sealed in the opening to fulfill their function.
  • the present invention relates to a composition which can be molded to form a fire stop device.
  • the composition comprises 100 parts by weight of a moldable resin and 20 to 100 parts by weight of an intumescent material, preferably exfoliated graphite.
  • the composition may optionally contain other typical components utilized in molding operations for resins such as lubricants, foaming agents, plasticizers, modifiers and processing aids .
  • the composition comprises 100 parts by weight of a moldable resin, 20 to 100 parts by weight of an intumescent material, and 1 to 5 parts by weight of a foaming or blowing agent .
  • the present invention is directed to composition which may be used to mold fire stop devices, such as couplings for use with PVC and other plastic pipe to bridge an opening in a wall and function as a fire stop for the opening as is described below.
  • the composition comprises 100 parts by weight of a suitable moldable resin and 20 to, 100 parts by weight of an intumescent material which expands to many times its volume upon being exposed to heat such as is generated in a fire situation.
  • other optional ingredients may be added such as lubricants, foaming agents, 10 plasticizers, modifiers, and processing aids.
  • the suitable moldable resin is utilized as a base for the molded product to carry the intumescent material and eliminate the need for separate intumescent components which would increase the cost and complexity of installations requiring fire blocks.
  • the moldable resin is a resin which is typically suitable for forming into products by conventional molding operations, particularly injection molding. Typically the resin will be selected from ABS, polyethylenes, polypropylenes, polycarbonates, polyvinylchlorides, or acrylic resins such as styrenes or MMA.
  • the moldable resin is a polyvinylchloride .
  • the intumescent material may be any of the commonly employed intumescent materials so long as they are compatible with the moldable resin utilized as the base material .
  • Such commonly employed intumescent materials include silicate and graphite based materials, preferably graphite based materials, most preferably exfoliated graphite.
  • the amount of intumescent material utilized in the composition is selected based upon the nature of the product to be molded and its intended use as well as the characteristics of the intumescent material.
  • the amount of the intumescent material is selected to provide the molded product with the desired fire stop properties such 5 that when the product is subjected to the heat of a fire, the intumescent material intumesces and blocks off the opening in the partition it is protecting.
  • the factors that will affect the selection of the amount of intumescing material include the size and volume of the 10 molded product, the intumescing properties of the intumescent material, and the presence of other optional components in the composition as will be explained further below.
  • the composition may contain other optional ingredients including many of the commonly utilized ingredients of moldable compositions .
  • the optional ingredients are typically one or more ingredients selected from lubricants, foaming agents, plasticizers, 20 modifiers, and processing aids.
  • the lubricants are utilized to improve the movement of the composition through the pathways of the molding machine. This is of particular use where the nature of the intumescent material is such that it may make the composition more difficult to move through the molding machine. In these situations, the use of one or more lubricants aids the movement of the composition through the' machine and reduces the operating pressure.
  • the one or more lubricants are selected from long chain fatty acids and their salts such as stearic acids and their salts, preferably stearic acids and their salts .
  • the lubricants may be present in an amount of up to about 5.0 parts by weight.
  • the modifiers such as impact modifiers are utilized to improve the physical characteristics of the molded product.
  • acrylic impact modifiers in an amount up to about 10 parts by weight may be utilized to improve the impact resistance of the molded product
  • plasticizers and processing aids may be employed in the usual amounts .
  • the foaming or blowing agent is utilized to provide for increased expansion of the char produced when the fire block formed of the composition of the present invention is exposed to the heat of a fire.
  • a foaming or blowing agent By utilizing a foaming or blowing agent, the amount of intumescent material required to produce a char of the required dimension to block off the opening is reduced. This is of particular utility where the nature of the selected intumescent is such that it increases the difficulty of the molding operation used to produce the final product or where the cost of the intumescent is high. In these situations, the addition of the foaming or blowing agent can significantly reduce the amount of the intumescent material of the composition.
  • the foaming or blowing agent is selected such it will become activated at or near the temperatures typically encountered in a fire situation.
  • the, composition is utilized to injection mold fire stop couplings and collars and comprises 100 parts by weight of a moldable resin, 20 to 80 parts by weight of exfoliated graphite, 1.5 to 3.0 parts by weight of one or more stabilizers, 0 to 5.0 parts by weight of one or more lubricants, 0 to 10 parts by weight of one or more modifiers, 0 to 5.0 parts by weight of one or more processing aids and up to 1.5 parts by weight of a foaming agent.
  • a particularly preferred composition for injection molding contains 100 parts by weight of PVC resins, 2.5 parts by weight of one or more stabilizers, 4.9 parts by weight of one or more lubricants, 8.0 parts by weight of an acrylic modifier, 3.0 parts by weight of acrylic processing aid, 25 parts by weight of exfoliated graphite and 1.2 parts by weight of a foaming agent.
  • compositions according to present invention contain 100 parts by 15 weight of PVC resins, 2 to 3 parts by weight of one or more stabilizers, 25 to 100 parts by weight of exfoliated graphite, up to 1.2 parts by weight of foaming agent and up to 100 parts by weight of one or more plasticizers.
  • Particularly preferred embodiments of these compositions 20 contain 100 parts by weight of PVC resin, 2 parts by weight of one or more stabilizers, 25 to 85 parts by weight of exfoliated graphite, 0.6 to 1.2 parts by weight of foaming agent, and 87 parts by weight of plasticizer.
  • compositions according the present invention are prepared in a generally conventional manner with somemodifications due to the nature of the ingredients by mixing the components of the compositions together andthen molding the composition in a suitable operation to form the fire stop devices of the present invention.
  • the molding operation involves mixing the components of the composition with the application of sufficient heat to melt the components such that they can be injected into the molding machine. Due to the nature of the intumescent and optional foaming or blowing agent, the mixing temperature is selected to be below the activation temperature of these ingredients .
  • the composition is injected into a suitable mold to form the final product.
  • the composition is generally injected under pressure and at a temperature to allow the final product to be homogeneously produced. It has been found 10 that due to the nature of the intumescent material, a very slow injection speed is desired to prevent excessive gas build-up and entrapment. To further reduce gas build-up, the mold is vented during final mold fill and pressurization. In order maintain the desired shape of 15 the final product and prevent premature material expansion upon release from the mold, the product is maintained in the mold for a longer cooling time than is typical in injection molding operations.
  • the material was injected into suitable molds at a slow injection speed with a high pressure ofabout 2000 psi.
  • the material was held in the mold for 30seconds at a holding pressure of 1200 psi.
  • the backpressure was 40 psi with a very slow screw rotation and along cooling time.
  • the fire stop devices prepared as described above are utilized to bridge openings in partitions such that when the device is exposed to the high heat of a fire, the intumescent material such as the exfoliated graphite expands to close off the opening in the partition to prevent the spread of fire through the opening.
  • the amount of foaming agent and intumescent material in thecompositions can be adjusted to give the proper amount ofexpansion to close off the opening upon exposure to the heat of the fire.
  • composition of the present invention is of particular use in a piping system comprising a pair of pipes to be coupled by a coupler which joins the pipes where they pass through a partition or wall .
  • the coupler includes a pair of sockets to opposite ends of the coupler for receiving the ends of the pipes to be joined and a wall region between the pair of sockets having a thickness greater than the sockets and an internal diameter less than that of the sockets .
  • the pipes have a standard plastic construction 20 made from material such as PVC which is additionally a preferred constituent of the coupler.
  • PVC provides a carrier for the intumescent material such as graphite which gives the coupler its intumescent properties .
  • the coupler of the same material as that used in the pipes, i.e. PVC, is that the pipes can be welded to the coupler using standard solvents. Further both the pipes and the coupler have the same physical characteristics so that all components of the system react in the same manner to outside forces to help the system stay together . In addition there are no contamination problems as there can be when parts of a plastic system are made from different materials.
  • the intumescent material making up the coupler when subjected to this heat rapidly expands from its original shape to a much larger mass of material.
  • the expansion of the intumescent material is many times its original size and the5 expansion is in the direction of the source of the heat which will stop the fire before it has a chance to spread.
  • the expanded material completely closes down the passage through the coupler and further completely seals off the passage around the pipe system through the wall. Accordingly, the intumescent material effectively seals off one room area from the next along all areas internally and externally of the pipe system.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Fireproofing Substances (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The present invention is directed to a composition which can be molded into a fire stop. The composition comprises 100 parts by weight of a moldable resin and 20 to 100 parts by weight of an intumescent material, preferably exfoliated graphite. The composition may optionally contain other typical components utilized in molding operations for resins such as lubricants, foaming agents, plasticizers, modifiers and processing aids.

Description

TITLE: : COMPOSITION FOR MOLDED FIRE STOP
FIELD OF THE INVENTION
The present invention relates to a compositionwhich can be molded into a fire and smoke block forpreventing the spread of fire through openings or penetrations in the walls and floors of buildings
BACKGROUND OF THE INVENTION
It has long been known by those skilled in the art that fire and smoke will move very rapidly between different areas in a building even when those areas are 15 separated by separations or partitions such as walls, ceilings and floors. Typically these separations or partitions are penetrated by things such as pipes, ducts, wires, etc. and the fire and smoke will travel along the outside of the penetrating member where it fits through 20 an opening or aperture in the separation. Accordingly, it is extremely important that these penetrations include fire blocks or fire stop devices.
Fire stop devices are used to prevent fire from spreading from one room to another through the openings or apertures in a partition such as a wall, floor or ceiling through which a pipe passes. The purpose of the fire stop device is to close off the opening in the partition in the event of a fire. The fire stop device generally contains an intumescent material which expands when the temperature reaches a certain level . The expansion of the intumescent material closes off the opening in the wall with a hard char.
A number of fire stop devices have been proposed requiring field installation whereby for example foil lined strips of intumescent material are wrapped around a plate and then a restraining collar is wrapped around the intumescent material and secured by screws or straps. Examples of many such fire stops are provided in amongst others U.S. patent 5,498 466, 5,953,872, 5,634,304, 5,390,465, and 5,076,309. The installation of such fire stop devices can be labor-intensive and requires that they be properly sealed in the opening to fulfill their function.
SUMMARY OF THE INVENTION
The present invention relates to a composition which can be molded to form a fire stop device. The composition comprises 100 parts by weight of a moldable resin and 20 to 100 parts by weight of an intumescent material, preferably exfoliated graphite. The composition may optionally contain other typical components utilized in molding operations for resins such as lubricants, foaming agents, plasticizers, modifiers and processing aids .
In an aspect of the invention, the composition comprises 100 parts by weight of a moldable resin, 20 to 100 parts by weight of an intumescent material, and 1 to 5 parts by weight of a foaming or blowing agent .
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention is directed to composition which may be used to mold fire stop devices, such as couplings for use with PVC and other plastic pipe to bridge an opening in a wall and function as a fire stop for the opening as is described below. The composition comprises 100 parts by weight of a suitable moldable resin and 20 to, 100 parts by weight of an intumescent material which expands to many times its volume upon being exposed to heat such as is generated in a fire situation. Depending upon the nature of the object to be molded and its intended use, other optional ingredients may be added such as lubricants, foaming agents, 10 plasticizers, modifiers, and processing aids.
The suitable moldable resin is utilized as a base for the molded product to carry the intumescent material and eliminate the need for separate intumescent components which would increase the cost and complexity of installations requiring fire blocks. The moldable resin is a resin which is typically suitable for forming into products by conventional molding operations, particularly injection molding. Typically the resin will be selected from ABS, polyethylenes, polypropylenes, polycarbonates, polyvinylchlorides, or acrylic resins such as styrenes or MMA. Preferably, the moldable resin is a polyvinylchloride .
The intumescent material may be any of the commonly employed intumescent materials so long as they are compatible with the moldable resin utilized as the base material . Such commonly employed intumescent materials include silicate and graphite based materials, preferably graphite based materials, most preferably exfoliated graphite.
The amount of intumescent material utilized in the composition is selected based upon the nature of the product to be molded and its intended use as well as the characteristics of the intumescent material. The amount of the intumescent material is selected to provide the molded product with the desired fire stop properties such 5 that when the product is subjected to the heat of a fire, the intumescent material intumesces and blocks off the opening in the partition it is protecting. The factors that will affect the selection of the amount of intumescing material include the size and volume of the 10 molded product, the intumescing properties of the intumescent material, and the presence of other optional components in the composition as will be explained further below.
The composition may contain other optional ingredients including many of the commonly utilized ingredients of moldable compositions . The optional ingredients are typically one or more ingredients selected from lubricants, foaming agents, plasticizers, 20 modifiers, and processing aids.
The lubricants are utilized to improve the movement of the composition through the pathways of the molding machine. This is of particular use where the nature of the intumescent material is such that it may make the composition more difficult to move through the molding machine. In these situations, the use of one or more lubricants aids the movement of the composition through the' machine and reduces the operating pressure.
Typically the one or more lubricants are selected from long chain fatty acids and their salts such as stearic acids and their salts, preferably stearic acids and their salts . The lubricants may be present in an amount of up to about 5.0 parts by weight. The modifiers such as impact modifiers are utilized to improve the physical characteristics of the molded product. For example, acrylic impact modifiers in an amount up to about 10 parts by weight may be utilized to improve the impact resistance of the molded product
Other optional and commonly utilized additives in molding operations such as plasticizers and processing aids may be employed in the usual amounts .
The foaming or blowing agent is utilized to provide for increased expansion of the char produced when the fire block formed of the composition of the present invention is exposed to the heat of a fire. By utilizing a foaming or blowing agent, the amount of intumescent material required to produce a char of the required dimension to block off the opening is reduced. This is of particular utility where the nature of the selected intumescent is such that it increases the difficulty of the molding operation used to produce the final product or where the cost of the intumescent is high. In these situations, the addition of the foaming or blowing agent can significantly reduce the amount of the intumescent material of the composition. The foaming or blowing agent is selected such it will become activated at or near the temperatures typically encountered in a fire situation.
In a particularly preferred embodiment, the, composition is utilized to injection mold fire stop couplings and collars and comprises 100 parts by weight of a moldable resin, 20 to 80 parts by weight of exfoliated graphite, 1.5 to 3.0 parts by weight of one or more stabilizers, 0 to 5.0 parts by weight of one or more lubricants, 0 to 10 parts by weight of one or more modifiers, 0 to 5.0 parts by weight of one or more processing aids and up to 1.5 parts by weight of a foaming agent. A particularly preferred composition for injection molding contains 100 parts by weight of PVC resins, 2.5 parts by weight of one or more stabilizers, 4.9 parts by weight of one or more lubricants, 8.0 parts by weight of an acrylic modifier, 3.0 parts by weight of acrylic processing aid, 25 parts by weight of exfoliated graphite and 1.2 parts by weight of a foaming agent.
Other preferred embodiments of compositions according to present invention contain 100 parts by 15 weight of PVC resins, 2 to 3 parts by weight of one or more stabilizers, 25 to 100 parts by weight of exfoliated graphite, up to 1.2 parts by weight of foaming agent and up to 100 parts by weight of one or more plasticizers. Particularly preferred embodiments of these compositions 20 contain 100 parts by weight of PVC resin, 2 parts by weight of one or more stabilizers, 25 to 85 parts by weight of exfoliated graphite, 0.6 to 1.2 parts by weight of foaming agent, and 87 parts by weight of plasticizer.
The compositions according the present invention are prepared in a generally conventional manner with somemodifications due to the nature of the ingredients by mixing the components of the compositions together andthen molding the composition in a suitable operation to form the fire stop devices of the present invention. Typically, the molding operation involves mixing the components of the composition with the application of sufficient heat to melt the components such that they can be injected into the molding machine. Due to the nature of the intumescent and optional foaming or blowing agent, the mixing temperature is selected to be below the activation temperature of these ingredients .
Once the components are properly mixed, the composition is injected into a suitable mold to form the final product. The composition is generally injected under pressure and at a temperature to allow the final product to be homogeneously produced. It has been found 10 that due to the nature of the intumescent material, a very slow injection speed is desired to prevent excessive gas build-up and entrapment. To further reduce gas build-up, the mold is vented during final mold fill and pressurization. In order maintain the desired shape of 15 the final product and prevent premature material expansion upon release from the mold, the product is maintained in the mold for a longer cooling time than is typical in injection molding operations.
The following examples are intended to illustrate the invention but the invention is not limited thereto .
100 kg of PVC resin was placed in a mixer and then 2.0 kg of PVC stabilizer and 0.6 kg of foaming agent added. The mixer was started and the components blended to 70 deg C. At 70 deg C, 87.0 kg of plasticizers were added, the mixture blended to 100 deg C and then the mixer stopped. 50.0 kg of exfoliated graphite is added and the mixture blended for 90 seconds. The mixture was utilized to injection mold a flexible plate for use as a fire stop for surrounding a copper pipe. The injection operation utilized barrel temperatures of 340 deg F, 335 deg F and 330 deg F for the front, middle and rear zones respectively. The material was injected into suitable molds at a medium injection speed with a medium pressure of about 1200 psi. The material was held in the mold for 5 to 10 seconds at a holding pressure of 800 psi. The back pressure was 40 psi with a medium screw rotation and 5 a medium cooling time.
100 kg of PVC resin was placed in a mixer and then 2.5 kg of PVC stabilizer and 1.2 kg of foaming agent added. The mixer was started and the components blended 10 to 70 deg C. At 70 deg C, 8.0 kg of acrylic impact modifier, 4.9 kg of lubricants, and 3.0 kg of processing aid were added, the mixture blended to 100 deg C and then the mixer stopped. 25.0 kg of exfoliated graphite was added and the mixture blended for 90 seconds. The 15 mixture was utilized to 'injection mold a 2 inch coupler for use as a fire stop for PVC pipe. The injection operation utilized barrel temperatures of 360 deg F, 350 deg F and 340 deg F for the front, middle and rear zonesrespectively. The material was injected into suitable molds at a slow injection speed with a high pressure ofabout 2000 psi. The material was held in the mold for 30seconds at a holding pressure of 1200 psi. The backpressure was 40 psi with a very slow screw rotation and along cooling time.
The fire stop devices prepared as described above are utilized to bridge openings in partitions such that when the device is exposed to the high heat of a fire, the intumescent material such as the exfoliated graphite expands to close off the opening in the partition to prevent the spread of fire through the opening. The amount of foaming agent and intumescent material in thecompositions can be adjusted to give the proper amount ofexpansion to close off the opening upon exposure to the heat of the fire. By providing the fire stop as a coupling it is not necessary to install additional fire stop material when a PVC pipe bridges an opening. Rather, the fire stop coupling is used to join two pieces of PVC pipe together through the opening. This makes the installation of the piping systems much easier and reduces costs associated with pipe installations.
The composition of the present invention is of particular use in a piping system comprising a pair of pipes to be coupled by a coupler which joins the pipes where they pass through a partition or wall . The coupler includes a pair of sockets to opposite ends of the coupler for receiving the ends of the pipes to be joined and a wall region between the pair of sockets having a thickness greater than the sockets and an internal diameter less than that of the sockets .
The pipes have a standard plastic construction 20 made from material such as PVC which is additionally a preferred constituent of the coupler. In the coupler the PVC provides a carrier for the intumescent material such as graphite which gives the coupler its intumescent properties .
The benefit of making the coupler of the same material as that used in the pipes, i.e. PVC, is that the pipes can be welded to the coupler using standard solvents. Further both the pipes and the coupler have the same physical characteristics so that all components of the system react in the same manner to outside forces to help the system stay together . In addition there are no contamination problems as there can be when parts of a plastic system are made from different materials.
When subjected to excessive heat e.g., heat created by a fire or the like, the intumescent material making up the coupler when subjected to this heat, rapidly expands from its original shape to a much larger mass of material. The expansion of the intumescent material is many times its original size and the5 expansion is in the direction of the source of the heat which will stop the fire before it has a chance to spread. The expanded material completely closes down the passage through the coupler and further completely seals off the passage around the pipe system through the wall. Accordingly, the intumescent material effectively seals off one room area from the next along all areas internally and externally of the pipe system.
As will be appreciated from the description above the installation of the pipe and the fire and smoke block is done in a very time efficient manner. This is an obvious advantage during the building setup. Furthermore, the actual operation of the fire and smoke block is also extremely efficient as described.
Although various preferred embodiments of the present invention have been described herein in detail, it will be appreciated by those skilled in the art that variations may be made thereto without departing from the spirit of the invention.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A composition for molding into a fire stop device, the composition comprising 100 parts by weight of a suitable PVC resin and 20 to 100 parts by weight of an intumescent material.
2. A composition according to claim 1 wherein the composition further includes up to 5.0 parts by weight of one or more lubricants, up to 10 parts by weight of one or more modifiers, up to 5.0 parts by weight of one or more processing aids, up to 1.5 parts by weight of a foaming agent and up to 100 parts by weight of a plasticizer .
3. A composition according to claim 1 comprising 100 parts by weight PVC resins, 2.0 to 2.5 parts by weight stabilizers, 0 to 5.0 parts by weight lubricants, 0 to 8 parts by weight acrylic modifier, 0 to 3.0 parts by weight acrylic processing aid, 25 to 85 parts by weight exfoliated graphite, 0 to 1.2 parts by weight of foaming agent and 0 to 87 parts by weight of plasticizer.
EP02742597A 2001-06-22 2002-06-25 Molded fire stop and composition therefor Withdrawn EP1456324A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA 2351262 CA2351262A1 (en) 2001-06-22 2001-06-22 Composition for molded fire stop
CA2351262 2001-06-22
PCT/CA2002/000950 WO2004041967A1 (en) 2001-06-22 2002-06-25 Molded fire stop and composition therefor

Publications (1)

Publication Number Publication Date
EP1456324A1 true EP1456324A1 (en) 2004-09-15

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EP02742598A Withdrawn EP1404781A1 (en) 2001-06-22 2002-06-25 Composition for molded fire stop
EP02740171A Withdrawn EP1404780A2 (en) 2001-06-22 2002-06-25 Molded fire stop and composition therefor
EP02742597A Withdrawn EP1456324A1 (en) 2001-06-22 2002-06-25 Molded fire stop and composition therefor

Family Applications Before (2)

Application Number Title Priority Date Filing Date
EP02742598A Withdrawn EP1404781A1 (en) 2001-06-22 2002-06-25 Composition for molded fire stop
EP02740171A Withdrawn EP1404780A2 (en) 2001-06-22 2002-06-25 Molded fire stop and composition therefor

Country Status (4)

Country Link
EP (3) EP1404781A1 (en)
AU (2) AU2002344883A1 (en)
CA (1) CA2351262A1 (en)
WO (3) WO2003000824A1 (en)

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CA2992334A1 (en) 2018-01-19 2019-07-19 Canplas Industries Ltd. Fire stop and method of making the same

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