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GB2125076A - Fire-retardant, anti-static compositions - Google Patents

Fire-retardant, anti-static compositions Download PDF

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Publication number
GB2125076A
GB2125076A GB08319799A GB8319799A GB2125076A GB 2125076 A GB2125076 A GB 2125076A GB 08319799 A GB08319799 A GB 08319799A GB 8319799 A GB8319799 A GB 8319799A GB 2125076 A GB2125076 A GB 2125076A
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GB
United Kingdom
Prior art keywords
composition
weight
parts
fire
solvent
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
GB08319799A
Other versions
GB8319799D0 (en
GB2125076B (en
Inventor
Michael Mcnally
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.)
Rheem Australia Pty Ltd
Original Assignee
Rheem Australia Pty 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 Rheem Australia Pty Ltd filed Critical Rheem Australia Pty Ltd
Publication of GB8319799D0 publication Critical patent/GB8319799D0/en
Publication of GB2125076A publication Critical patent/GB2125076A/en
Application granted granted Critical
Publication of GB2125076B publication Critical patent/GB2125076B/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00Materials not provided for elsewhere
    • C09K3/16Anti-static materials
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K21/00Fireproofing materials
    • C09K21/02Inorganic materials
    • C09K21/04Inorganic materials containing phosphorus
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/47Oxides or hydroxides of elements of Groups 5 or 15 of the Periodic Table; Vanadates; Niobates; Tantalates; Arsenates; Antimonates; Bismuthates
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/693Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

A fire-retardant, anti-static composition for coating articles such as brattice cloth contains fire- retardants, electrolytes, a hygroscopic surfactant, a binder, aqueous and non- aqueous solvents, and an emulsion stabilizer. The fire-retardant compound is chosen from chlorinated paraffins and inorganic compounds selected from the oxides, halides, borates, phosphates and polyalkylphosphates of elements of groups 2-5 of the Periodic Table. The surfactant used has humectant and hygroscopic properties, e.g. an ethoxylate surfactant showing medium hydrophilic/hydrophobic properties. The binder used is elastomeric and polymeric e.g. natural rubber or butyl rubber.

Description

SPECIFICATION Fire-retardant, anti-static compositions This invention relates to improved fire-resistant and anti-static coating compositions for articles formed from natural and/or synthetic materials.
More particularly, the invention relates to such coating compositions for coating woven or nonwoven articles such as sheeting, for example hessian, plastic film and woven plastic sheeting.
Without restricting it in any way, the invention relates more particularly to the coating of an article in the form of a laminated sheeting formed from plastic tape such as polyolefin tape woven as warp and weft, having a polyolefin film applied to one side by extrusion coating.
Typical articles for which the invention has immediate application are, for example, air duct piping and brattice cloth. Brattice cloth is used in mines, and particularly coal mines, and is hung in such a fashion as to direct and circulate air throughout the mine.
In such applications, the brattice clotch should have characteristics such as good fire-retardance and good elelectrical conductivity on its surface (i.e., it should be anti-static). The cloth is therefore coated with a fire-resistant, anti-static composition to achieve these ends. The coated brattice cloth should also be resistant to the leaching of water-soluble components from the coating, which helps to prevent the atmosphere in the mine from corroding metal fittings and equipment.
When hung in a coal mine, coal dust accumulates on brattice cloth, requiring periodical hosing down to remove the dust. Partly for this reason, prior art fire-resistant, anti-static coatings for such cloth suffer in that there is gradual deterioration of the coated cloth by the soluble chemicals being washed out of the coating.
A further disadvantage of prior art formulations is their lack of emulsion stability, which gives rise to difficulty with the storage of the coating composition prior to coating the cloth.
A further problem with prior art coating compositions is that, following their application on brattice cloth, for example, the coating, after drying, tends to have an excessive affinity for water. Although some degree of hygroscopicity is a necessary property to enhance electrical conductivity, too much "sweating" of the surface inconveniences handling and accelerates soiling of the fabric by coal dust in the mine atmosphere.
An example of a prior art composition is described in AU-A-474,627 of Rheem Australia Ltd.
In this specification, the term "article" is to be understood as referring in particular to cloth and similar articles, but the coating composition of the invention can be applied to any other article, where fire-resistant and anti-static properties will be of use.
Accordingly, this invention is intended to substantially overcome or ameliorate the aforementioned problems by the provision of a new, improved fire-resistant and anti-static coating composition.
According to the invention, there is provided a fire-retardant, anti-static composition for coating articles formed from natural and/or synthetic material, said composition comprising, (a) at least one fire-retardant compound chosen from highly chlorinated paraffins and inorganic compounds chosen from the oxides, halides, borates, phosphates and polyalkylphosphates of elements of groups 2 to 5 of the Periodic Table, (b) at least one water-soluble electrolyte, (c) at least one surfactant having humectant and hygroscopic properties, (d) at least one elastomeric and polymeric binder, (e) an aqueous solvent, and (f) a non-aqueous solvent, and (g) at least one emulsion stabilizer.
The invention also concerns a method of preparation of the above composition, and a method of coating articles with the composition.
There are a diversity of materials which may be used as fire-retardant compounds; their selection will be based on effectiveness, cost and other similar requirements.
The level of surface electrical conductivity required for some applications, such as brattice cloth, is so high that it often cannot be achieved in a reliable manner by utilising a conventional antistatic agent. The achievement of the necessary level of electrical conductivity then requires the use of an electrolyte phase comprising an electrolyte and a hygroscopic agency within the surface of the coating.
Consequently, a desirable composition comprises a mixture of organic and inorganic chemicals that are finely dispersed, intimately mixed and bonded together and to the articles in a manner to resist the exigencies of use.
There are many fire-retardant compounds which can be used in the present invention. A preferred compound is the group of highly chlorinated paraffins. These paraffins are longchain, saturated, chlorinated, linear hydrocarbons preferably containing 20 to 30 carbon atoms, about 70% chlorine by weight and having a softening point of from 70 to 1 00 C. Other fireretardant compounds are inorganic compounds such as antimony oxide. The use of such compounds as antimony oxide together with the highly chlorinated paraffins results in a fireretardant synergism. Inorganic compounds similar to antimony oxide which can function as fireretardants and synergists are the oxides, halides, borates, phosphates and polyalkylphosphates of elements of groups 2 to 5 of the Periodic Table.
The composition of the invention also includes a water-soluble electrolyte which functions as an anti-static agent. Some suitable electrolytes are sodium tetraborate decahydrate and calcium chloride. As mentioned above, it is important to also include a surfactant having humectant and hygroscopic properties to improve the conductivity, and hence the anti-static properties, of the composition. For example, a suitable surfactant is an ethoxylate, showing a medium hydrophilic/hydrophobic balance.
A binder is necessary for making the composition adhere to the articles. An elastomeric, polymeric binder has the best balance of properties in terms of adhesion, waterresistance and flexibility. Suitable binders are natural rubbers, synthetic rubbers, or mixtures of the two. A preferred binder is unsaturated butyl rubber.
The composition also contains an aqueous solvent and a non-aqueous solvent. The aqueous solvent is most preferably water, and the nonaqueous solvent is preferably a hydrocarbon solvent, for example, having a boiling range between 90" and 1300C.
As a preferred embodiment, the composition may also contain a solvent coupler, to assist in the mixing of the two solvent systems. A preferred coupler is a monohydric alcohol such as propanol.
The composition also contains an emulsion stabilizer. A suitable stabilizer is a glycol ether.
Preferably a glycol monoether is used. Two examples of suitable glycol ethers are diethylene glycol monobutyl ether and ethylene glycol monobutyl ether. Alternatively, other generally known stabilizers can be used.
The composition is prepared by mixing the aqueous solvent (i.e. water) with the hydrophilic components of the composition. The hydrophobic components are similarly mixed with the nonaqueous solvent. The two solvent systems are then mixed together to form a stable emulsion.
The viscosity of the emulsion is preferably sufficient to allow knife coating of the brattice cloth or other article.
The composition is coated on to the article or cloth, and allowed to dry. The coated article retains some level of moisture as described earlier, according to the amount of moisture in the atmosphere and general environment.
A particularly preferred composition is one which comprises (a) (i) 1 5 to 50 parts by weight of long-chain, saturated, chlorinated, linear hydrocarbons of from 20 to 30 carbon atoms, containing about 70% chlorine by weight, and having a softening point of from 700C to 1 000C, (ii) 2 to 10 parts by weight of antimony oxide, (b) (i) 0.1 to 5 parts by weight of sodium tetraborate decahydrate, (ii) 1 to 30 parts by weight of calcium chloride.
(c) 1 to 10 parts by weight of an ethoxylate surfactant showing a medium hydrophilic/ hydrophobic balance, (d) 20 to 30 parts by weight of unsaturated butyl rubber, (e) 4 to 5 parts by weight of water, (f) 20 to 30 parts by weight of a hydrocarbon solvent having a boiling range of from 900C to 1300C, (g) 20 to 30 parts by weight of a glycol ether, and (h) 5 to 30 parts by weight of propanol as a solvent coupler.
It will be understood that, for a particular method of application and end use of the article, the percentage of the components should be adjusted to best advantage to give a satisfactory working formulation.
The amount of composition required may be varied depending upon the variation in the required properties of the article to be coated, but it is likely to be of the order of 1% to 20% of the weight of the coated article. In this range, coatings usually display a maximum electrical resistance of 3x 108 ohms when tested to the National Coal Board (UK) Specification Number 1 58/1980.
Example The following formulation was found suitable for use on polyolefin woven cloth with a coating weight of within the localised limits of 10 to 40 grams per square metre of the coated aarticle.
Parts by Component weight Cereclor 70f') 1 5-20 Antimony oxide 2-10 Sodium tetraborate decahydrate 0.1-5 Calcium chloride 1-30 Teric 1 8M 10(2) 1-10 Butyl rubber adhesive 10--40 Hydrocarbon solvent 20-30 Propanol 5-30 Diethylene glycol monobutyl ether 20-30 (1) "Cereclor" is a Registered Trade Mark of .C.I. Ltd., and comprises long-chain, saturated, chlorinated hydrocarbons of from 20 to 30 carbon atoms, containing about 70% by weight of chlorine, and having a softening point of from 70 C to 1000C and an average molecular weight of about 1000.
(2) "Teric" is a Registered Trade Mark of l.C.I. Ltd., and represents octadecylamine ethoxylates.

Claims (20)

Claims
1. A fire-retardant, anti-static composition for coating articles formed from natural and/or synthetic material, said composition comprising, (a) at least one fire-retardant compound chosen from highly chlorinated paraffins and inorganic compounds chosen from the oxides, halides, borates, phosphates and polyalkylphosphates of elements of groups 2 to 5 of the Periodic Table, (b) at least one water-soluble electrolyte, (c) at least one surfactant having humectant and hygroscopic properties, (d) at least one elastomeric and polymeric binder, (e) an aqueous solvent, (f) a non-aqueous solvent, and (g) at least one emulsion stabilizer.
2. The composition as defined in claim 1, wherein said emulsion stabilizer is a glycol ether.
3. The composition as defined in claim 1 or claim 2, which also includes a solvent coupler to promote compatability between said aqueous and said non-aqueous solvents.
4. The composition as defined in claim 3, wherein said solvent coupler is a monohydric alcohol.
5. The composition as defined in any one of claims 1 to 4, wherein said at least one of fire retardant compound comprises highly chlorinated paraffins and at least one of said inorganic compounds.
6. The composition as defined in claim 5 wherein said highly chlorinated paraffins are longchain, saturated, chlorinated, linear hydrocarbons containing from 20 to 30 carbon atoms, containing about 70% chlorine by weight, and having a softening point of from 70 C to 1000C.
1000C.
7. The composition as defined in any one of claims 1 to 6, wherein said inorganic compound is antimony oxide.
8. The composition as defined in any one of claims 1 to 7, wherein said at least one watersoluble electrolyte is sodium tetraborate decahydrate and calcium chloride.
9. The composition as defined in any one of claims 1 to 8, wherein said surfactant having humectant and hygroscopic properties is an ethoxylate surfactant showing a medium hydrophilic/hydrophobic balance.
10. The composition as defined in any one of claims 1 to 9, wherein said elastomeric and polymeric binder is chosen from natural rubber, synthetic rubber and mixtures thereof.
1 The composition as defined in claim 10, wherein said binder is unsaturated butyl rubber.
12. The composition as defined in any one of claims 1 to 11, wherein said aqueous solvent is water.
13. The composition as defined in any one of claims 1 to 12, wherein said non-aqueous solvent is a hydrocarbon solvent.
14. The composition as defined in any one of claims 1 to 13, which is in the form of an emulsion.
1 5. A fire-retardant, anti-static composition for coating articles formed from natural and/or synthetic material, said composition comprising, (a) (i) 1 5 to 50 parts by weight of long-chain, saturated, chlorinated, linear hydrocarbons of from 20 to 30 carbon atoms, containing about 70% chlorine by weight, and having a softening point of from 70 C to 1000C, (ii) 2 to 10 parts by weight of antimony oxide, (b) (i) 0.1 to 5 parts by weight of sodium tetraborate decahydrate, (ii) 1 to 30 parts by weight of calcium chloride, (c) 1 to 10 parts by weight of an ethoxylate surfactant showing a medium hydrophilic/hydrophobic balance, (d) 20 to 30 parts by weight of unsaturated butyl rubber, (e) 4 to 5 parts by weight of water, (f) 20 to 30 parts by weight of a hydrocarbon solvent having a boiling range of from 900C to 1 30 C (g) 20 to 30 parts by weight of a glycol ether, and (h) 5 to 30 parts by weight of propanol as a solvent coupler.
1 6. A fire-retardant, anti-static composition substantially as herein described with reference to the Example.
1 7. A method for the preparation of the composition defined in any one of claims 1 to 16, comprising mixing the hydrophilic components of said composition with said aqueous solvent, mixing the hydrophobic components of said composition with said non-aqueous solvent, and then mixing the aqueous and non-aqueous solvent containing all the components of said composition together to form a stable emulsion.
18. The method as defined in claim 17, wherein the viscosity of said stable emulsion is suitable for knife coating the emulsion onto articles.
1 9. A method of rendering an article fireresistant and anti-static, comprising coating an article with a fire-resistant, anti-static composition as defined in any one of claims 1 to 16, and then allowing the article so coated to dry.
20. An article whenever coated with a composition as defined in any one of claims 1 to 16.
GB08319799A 1982-07-22 1983-07-22 Fire-retardant anti-static compositions Expired GB2125076B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPF501482 1982-07-22

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GB8319799D0 GB8319799D0 (en) 1983-08-24
GB2125076A true GB2125076A (en) 1984-02-29
GB2125076B GB2125076B (en) 1985-10-02

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GB (1) GB2125076B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0186876A3 (en) * 1984-12-25 1987-01-14 Teijin Limited Chemical-resistant filter material
EP0352882A1 (en) * 1988-06-27 1990-01-31 Milliken Research Corporation Method for making electrically conductive textile materials
EP0434190A1 (en) * 1989-10-25 1991-06-26 Imperial Chemical Industries Plc Mineral oil composition containing a fire suppressant
WO2002050232A3 (en) * 2000-12-21 2002-09-26 Henkel Ecolab Gmbh & Co Ohg Method for removing electrostatically attached residues from plastic surfaces
US20140099849A1 (en) * 2012-09-28 2014-04-10 Chuanping Li Pigment paste composition
US11828026B2 (en) * 2018-01-31 2023-11-28 Oji Holdings Corporation Base sheet for total heat exchanger element

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU645275B2 (en) * 1989-11-29 1994-01-13 Southcorp Australia Pty Ltd Coated fabric

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0186876A3 (en) * 1984-12-25 1987-01-14 Teijin Limited Chemical-resistant filter material
EP0352882A1 (en) * 1988-06-27 1990-01-31 Milliken Research Corporation Method for making electrically conductive textile materials
EP0434190A1 (en) * 1989-10-25 1991-06-26 Imperial Chemical Industries Plc Mineral oil composition containing a fire suppressant
WO2002050232A3 (en) * 2000-12-21 2002-09-26 Henkel Ecolab Gmbh & Co Ohg Method for removing electrostatically attached residues from plastic surfaces
US20140099849A1 (en) * 2012-09-28 2014-04-10 Chuanping Li Pigment paste composition
US11828026B2 (en) * 2018-01-31 2023-11-28 Oji Holdings Corporation Base sheet for total heat exchanger element

Also Published As

Publication number Publication date
GB8319799D0 (en) 1983-08-24
GB2125076B (en) 1985-10-02
AU1673183A (en) 1984-03-15

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930722