CA1040778A - Iron oxide-organo halogen flame retardants for polyolefins - Google Patents
Iron oxide-organo halogen flame retardants for polyolefinsInfo
- Publication number
- CA1040778A CA1040778A CA207,339A CA207339A CA1040778A CA 1040778 A CA1040778 A CA 1040778A CA 207339 A CA207339 A CA 207339A CA 1040778 A CA1040778 A CA 1040778A
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- CA
- Canada
- Prior art keywords
- halogen
- composition
- weight
- flame resistant
- oxide
- Prior art date
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Abstract
ABSTRACT OF THE DISCLOSURE
An improved and economical fire retarding system for polymeric compositions comprising the combination of a halogen-containing hydrocarbon and an oxide of iron or an oxide of copper: a method of rendering polymeric compositions resistant to flame; and the flame resistant polymeric com-positions and products comprising the same.
An improved and economical fire retarding system for polymeric compositions comprising the combination of a halogen-containing hydrocarbon and an oxide of iron or an oxide of copper: a method of rendering polymeric compositions resistant to flame; and the flame resistant polymeric com-positions and products comprising the same.
Description
104077t3 Fire retarding systems based upon the combination of halogen-containing materials with antimony compounds such as oxides or halides of antimony have heretofore been ex-tensively utilized to impart resistance to flame and com-bustion in polymeric compositions and other materials. For example, U.S. Patent 2,480,298 of August 30, 1949, teaches the use of at least 6 percent by weight of a chlorinated hydro-carbon in combination with 20 to 35 percent by weight of antimony trioxide as a flame proofing agent or system for polyethylene compositions.
The need for obtaining more effective resistance to flame or fire in polymeric products and other materials, more-over, has prompted efforts to improve this basic system of :::
combinations of halogenated materials and antimony compounds such as are dis¢losed in U.S. Patents 3,582,518 dated June 1, 1971; 3,740,245 dated June 19, 1973; and 3,741,893 dated June 26, 1973. Other recent patents, including U.S. Patents ~,, 3,340,226 dated September 5, 1967 and 3,705,128 dated December 5, 1972, have proposed the use of a variety of metal com-positions, such for example, as tin and zinc compounds, assubstitutes or supplements for antimony compounds in halogen-containing fire retarding systems as a means of enhancing resistance to flame and overcoming shortcomings of the basic system.
The present invention involves the discovery of an improvement in those basic and conventional fire retarding systems which contain a halogen material and an antimony com-pound, and it comprises the replacement of the antimony com-pound, or its equivalent metal compound in the system, with a more effective and economical component, namely, an oxide of iron or copper and combinations thereof. Accordingly, this ; invention includes novel and more effective fire retarding 1.
systems composed of new and improved combinations of more economical ingredients and the resultant compositions and the method of obtaining such compositions.
It is accordingly an object of this invention to provide a more effective and economical fire retarding system comprising novel combinations of halogen-containing hydro-carbons with low cost metal oxides.
It is another object of this invention to increase resistance to flame and combustion in flame retarded polymeric compositions through the use of an improved fire retarding system of reduced material costs and thereby improve effective-ness while providing a savings in materials.
It is also an object of this invention to provide new and improved polymeric compositions, and products thereof, of improved resistance to flame and combustion and methods for producing the compositions.
It is a further object of this invention to provide electrical conductors with polymeric insulations of improved resistance to flame and combustion, at lower costs.
This invention comprises the replacement, or supplementation, of antimony compounds, such as oxides or halides of antimony, or other metal compound equivalents there-for, in fire retarding systems of halogen-containing hydro-carbons, with more effective and lower cost components com-prising particulate ferric oxide, ferrous oxide, cuprous oxide and cupric oxide, or mixtures thereof. The improvements and advantages of this invention are derived from both the dis-covered superior effectiveness of the oxides of iron or copper in combination with a halogen-containing hydrocarbon as a fire retarding system whereby increased resistance to flame and combustion is attained, and the generally lower costs of oxides of iron or copper as compared with the cost of antimony
The need for obtaining more effective resistance to flame or fire in polymeric products and other materials, more-over, has prompted efforts to improve this basic system of :::
combinations of halogenated materials and antimony compounds such as are dis¢losed in U.S. Patents 3,582,518 dated June 1, 1971; 3,740,245 dated June 19, 1973; and 3,741,893 dated June 26, 1973. Other recent patents, including U.S. Patents ~,, 3,340,226 dated September 5, 1967 and 3,705,128 dated December 5, 1972, have proposed the use of a variety of metal com-positions, such for example, as tin and zinc compounds, assubstitutes or supplements for antimony compounds in halogen-containing fire retarding systems as a means of enhancing resistance to flame and overcoming shortcomings of the basic system.
The present invention involves the discovery of an improvement in those basic and conventional fire retarding systems which contain a halogen material and an antimony com-pound, and it comprises the replacement of the antimony com-pound, or its equivalent metal compound in the system, with a more effective and economical component, namely, an oxide of iron or copper and combinations thereof. Accordingly, this ; invention includes novel and more effective fire retarding 1.
systems composed of new and improved combinations of more economical ingredients and the resultant compositions and the method of obtaining such compositions.
It is accordingly an object of this invention to provide a more effective and economical fire retarding system comprising novel combinations of halogen-containing hydro-carbons with low cost metal oxides.
It is another object of this invention to increase resistance to flame and combustion in flame retarded polymeric compositions through the use of an improved fire retarding system of reduced material costs and thereby improve effective-ness while providing a savings in materials.
It is also an object of this invention to provide new and improved polymeric compositions, and products thereof, of improved resistance to flame and combustion and methods for producing the compositions.
It is a further object of this invention to provide electrical conductors with polymeric insulations of improved resistance to flame and combustion, at lower costs.
This invention comprises the replacement, or supplementation, of antimony compounds, such as oxides or halides of antimony, or other metal compound equivalents there-for, in fire retarding systems of halogen-containing hydro-carbons, with more effective and lower cost components com-prising particulate ferric oxide, ferrous oxide, cuprous oxide and cupric oxide, or mixtures thereof. The improvements and advantages of this invention are derived from both the dis-covered superior effectiveness of the oxides of iron or copper in combination with a halogen-containing hydrocarbon as a fire retarding system whereby increased resistance to flame and combustion is attained, and the generally lower costs of oxides of iron or copper as compared with the cost of antimony
- 2 -~04~778 4lD-1380 compounds and many of their equivalents in the prior art.
The enhanced fire retarding systems of this invention include the new combinations of oxides of iron or oxides of copper, and mixtures thereof, with the halogen-containing materials which had heretofore been used in fire retarding systemswith antimony compounds or their equivalents, including the halogenated hydrocarbons of U.S. Patent 2,480,298 dated August 30, 1949 and the other prior art patents cited above. For example, conventional halogenated hydrocarbons for flame re~stance comprise chlorinated parrafin, chlorinated propanes, chlor-inated propylenes, hexachloroethane, chlorinated polythene, chlorinated polyisobutylene, polyvinyl chloride, polyvinylidene chloride, after-chlorinated polyvinyl chloride, chlorinated polyphenyls, chlorinated naphthalenes, hexa-; chlorobenzene, chlorinated indenes, chlorinated polystyrenes, chlorinated diphenyl alkanes, and their brominated or other equivalents. Also included as conventional halogenated hydro-carbons are proprietary halogenated flame retardants such as Hooker Chemical Company's Dechlorane Plus 515, Diamond Alkali Company's Chlorowax, and similar products.
The proportions of the ingredients of the novel combinations comprising the fire retarding systems of this invention, and also the amounts of the combinations of the system added to polymer compositions can vary considerably and depend primarily upon the degree of resistance to flame or combustion required or desired, and also upon the combustion characteristics of the particular polymeric composition treated. However, with the fire retarding systems of this invention, typical amounts of the oxides of iron or copper 30 for dispersion through a polymeric composition comprise approximately 5 to 10 percent by weight thereof based upon the total weight of the combustible components of the overall polymeric composition. Moreover, inasmuch as the components of this invention are more effective in the fire retarding nr~ systems ~ t antimony compounds, the amounts of iron and copper oxides can be reduced from the proportions of antimony previously used to achieve equivalent levels of resistance to flame and fire, or similar amounts of iron or copper oxides to those of former antimony use can be employed with attendant increases in resistance to flame and fire. Generally, amounts of particulate iron or copper oxides of from at least about 3 percent up to about 15 percent by weight, based upon the total weight of the combustible components of the overall polymeric composition, will suffice in most applications and provide the prerequisite level of flame resistance.
The proportions of the halogen-containing material of the novel combinations of the improved fire retarding systems of this invention are generally the same as employed in the prior art systems containing antimony compounds. More-over, as is well known and appreciated in the art, since it is the halogen of this component of the system which provides the re~stance to flame and combustion, supplemented or enhanced by the presence of an antimony or other metal component, the amount of halogen-containing material utilized depends upon the content or proportion of halogen in such a material and its availability at flame or combustion temperatures as well as the degree of flammability of a given polymeric composition and the level of resistance to flame and combustion desired or required therefor. Generally, overall halogen contents of within the approximate range of about 8 to 50 percent by weight thereof based upon the total weight of the combustible in-gredients of the polymeric compositions provide effectivelevels of resistance to flame and combustion when combined with the metal oxides of this invention. Frequently about 15 _ 41D-1380 104~778 to 35 percent by weight of overall halogen content will serve most applications.
The following examples and data derived from a comparative evaluation of several fire retarding systems and ingredients, including the system of this invention comprising the replacement of antimony trioxide with smaller proportions of the lower costs oxides, when applied to common crosslink cured polyethylene compositions with a typical chlorine-containing hydrocarbon, demonstrate the relative effectiveness of such systems and the advantages and improvements of this invention.
; The polymeric composition employed to evaluate the effects of oxides of iron and copper upon fire retarding systems with a halogen-containing material, consisted of the cured product of the following typical curable compound formulation given in relative parts by weight: Polyethylene low density polyethylene, Sinclair Koppers Co. - 100 parts;
Antioxidant: polymerized 1,2 dihydro-2,2,4 trimethylquinoline (Agerite~ Resin D, R.T. Vanderbilt Co.) - 1 part; Curing -~ 20 coagent, triallyl cyanurate - 1 part; and Peroxide curing agent, ,~; di~ cumyl peroxide Di Cup ~ , Herculeæ Co.) - 3.5 parts.
To provide the halogen-containing material for the ;; fire retarding systems evaluated within the given polyethylene composition, 20 parts by weight of a commercial flame retardant, Hooker Chemical Company's Dechlorane~ 602, was combined with ` the said polyethylene formulation. DECHLORANE 602 is a Diels-Alder condensation reaction product betweel 1 mole of furan and 2 moles of hexachlorocyclopentadiene, having a chlorine content of 69.4 percent by weight and the structural formula of:
. ~
~ 30 ":~
_ 5 _ ~.;~
104~778 Cl Cl 41D-1380 Cl ~ ~3 Cl The flame resistance of the foregoing polyethylene composition containing 20 parts by weight of Dechlorane 602 as a standard, and also this base composition including antimony trioxide, zinc borate, or an oxide of this invention, and in some cases containing an additional halogen-containing material, were each measured by the Oxygen Index Test ~ASTM
D-2863-70). The halogen-containing materials and/or metal compounds added to the given base composition providing the standard, and the oxygen index values of the standard alone and including the added halogen-containing materials and/or metal compounds in the amounts specified are all given in the `;
following table of the fire retarding systems and their relative resistance to flame. All amounts of ingredients are in relative ,. ..
parts by weight, and in each instance the base composition is present in 125.5 parts by weight, in the relative proportions of ingredients set forth above.
; ~. .
~' ~ '.' . .
F ,~
~' :
.... . . .
-, . ' ' . .
1040'778 41D-1380 o ~
_, , N
O
o ~ ~a O ~
C) O
Q ~ S ~
e ,~
I ~ u"a O 1` O~
I
:F~ I ~D N
O
al ~ O
~1 . m s~
o a~
r~ H O _I
d~ ~
t~l U~ ~1 ~D . ~
O ~ ~
O ~ O
Nl N SJ 0 ~ o O
.: ~ I O "I
~, 0 ~,. 'O _I Q
_I
O S'~ ~
:, co e ` ~ ~u .: N ~ ,~
, :; . O ~ ~1 ~ m ~ ~
_ ~ o o ô o ` ~ 1 ~ N rl r~ N 0 . ~ X ~ ~ X ~ X
1 ~ ~ ~ ` ~ x o : ~. 0 ~ 5 0 0 ~
- o ~ .Q ~ X ~ ~ m ~
.;; o o x ~ ~o ~ ~ 0:;~ k E3 ~ ~- O ~ H O~1 :, O O O ~ XX 0 0 US-l I s~ ~ o u oo ,~ ~ e s.. F. ~ ~-~ u ~ ~
:' ~d ~ ~ X~ ~ U
m x ~ ~ ~ H HCJ N O ~It :
The polyethylene compositions of the standard and also including the additives of each examples were all prepared and heat cured with the peroxide curing agent in an identical manner. That is allingedients of the formulation, except the peroxide curing agent were irst blended by mixing at a roll temperature of about 200F for a period of about lO minutes on a two roll rubber mill, then the peroxide curing agent was added and mixing continued at a temperature of 200F for 3 minutes. Egual ~uantities of the blended composition of the standard and each sample was molded at about 1300 psi and 350F for about 45 minutes, thereby crosslink curing the poly-ethylene with the peroxide agent and forming a test specimen measuring 4~ inch X 4~ inch for evaluation of its flame re~i~tance by the oxygen index test procedure.
The improved, and more economical fire retarding systems comprising oxides of iron or copper of this invention are particularly applicable to polyolefin polymeric materials and composition~, either cured or uncured, comprising ethylene-containing polymers such as polyethylene, copolymers of ethylene and other polymerizable materials, and blends of polymers or copolymers of ethylene with other polymeric ~- materials such as ethylene-vinyl acetate, copolymers of ethylene and propylene and terpolymers of ethylene and propylene with a diene and the like.
The flame retarded polymeric compositions of this invention are suitable for use in the formation of a variety i;
of products and articles wherein resistance to flame is a factor. The compositions provided by this invention are particularly useful as flame resistant dielectric insulations and jackets for wire and cable and other electrical conductors.
The method of rendering polymeric materials or com-positions thereof resistant to flame and combustion according ~0~8 41D-1380 to this invention, comprises the addition and distribution of the components of the novel fire retarding system comprising a particulate oxide of iron or copper with a halogen-containing hydrocarbon throughout the mass of the polymer by any suitable mixing or compounding technique or apparatus.
The flame retarded composition of this invention may also include other conventional and typical ingredients, additives and agents, depending upon the intended service of the products formed therefrom, and their required or desired properties. For example other components may comprise preservatives, lubricants, mold release agents, pigments or coloring agents, fillers, processing aids, waterproofing agents, coupling agents, and additional flame proofing materials.
Although the invention has been described with reference to certain specific embodiments thereof, numerous modifications are possible and it is desired to cover all modifications falling within the spirit and scope of this invention.
:;, '' ''' ~: _ 9 _
The enhanced fire retarding systems of this invention include the new combinations of oxides of iron or oxides of copper, and mixtures thereof, with the halogen-containing materials which had heretofore been used in fire retarding systemswith antimony compounds or their equivalents, including the halogenated hydrocarbons of U.S. Patent 2,480,298 dated August 30, 1949 and the other prior art patents cited above. For example, conventional halogenated hydrocarbons for flame re~stance comprise chlorinated parrafin, chlorinated propanes, chlor-inated propylenes, hexachloroethane, chlorinated polythene, chlorinated polyisobutylene, polyvinyl chloride, polyvinylidene chloride, after-chlorinated polyvinyl chloride, chlorinated polyphenyls, chlorinated naphthalenes, hexa-; chlorobenzene, chlorinated indenes, chlorinated polystyrenes, chlorinated diphenyl alkanes, and their brominated or other equivalents. Also included as conventional halogenated hydro-carbons are proprietary halogenated flame retardants such as Hooker Chemical Company's Dechlorane Plus 515, Diamond Alkali Company's Chlorowax, and similar products.
The proportions of the ingredients of the novel combinations comprising the fire retarding systems of this invention, and also the amounts of the combinations of the system added to polymer compositions can vary considerably and depend primarily upon the degree of resistance to flame or combustion required or desired, and also upon the combustion characteristics of the particular polymeric composition treated. However, with the fire retarding systems of this invention, typical amounts of the oxides of iron or copper 30 for dispersion through a polymeric composition comprise approximately 5 to 10 percent by weight thereof based upon the total weight of the combustible components of the overall polymeric composition. Moreover, inasmuch as the components of this invention are more effective in the fire retarding nr~ systems ~ t antimony compounds, the amounts of iron and copper oxides can be reduced from the proportions of antimony previously used to achieve equivalent levels of resistance to flame and fire, or similar amounts of iron or copper oxides to those of former antimony use can be employed with attendant increases in resistance to flame and fire. Generally, amounts of particulate iron or copper oxides of from at least about 3 percent up to about 15 percent by weight, based upon the total weight of the combustible components of the overall polymeric composition, will suffice in most applications and provide the prerequisite level of flame resistance.
The proportions of the halogen-containing material of the novel combinations of the improved fire retarding systems of this invention are generally the same as employed in the prior art systems containing antimony compounds. More-over, as is well known and appreciated in the art, since it is the halogen of this component of the system which provides the re~stance to flame and combustion, supplemented or enhanced by the presence of an antimony or other metal component, the amount of halogen-containing material utilized depends upon the content or proportion of halogen in such a material and its availability at flame or combustion temperatures as well as the degree of flammability of a given polymeric composition and the level of resistance to flame and combustion desired or required therefor. Generally, overall halogen contents of within the approximate range of about 8 to 50 percent by weight thereof based upon the total weight of the combustible in-gredients of the polymeric compositions provide effectivelevels of resistance to flame and combustion when combined with the metal oxides of this invention. Frequently about 15 _ 41D-1380 104~778 to 35 percent by weight of overall halogen content will serve most applications.
The following examples and data derived from a comparative evaluation of several fire retarding systems and ingredients, including the system of this invention comprising the replacement of antimony trioxide with smaller proportions of the lower costs oxides, when applied to common crosslink cured polyethylene compositions with a typical chlorine-containing hydrocarbon, demonstrate the relative effectiveness of such systems and the advantages and improvements of this invention.
; The polymeric composition employed to evaluate the effects of oxides of iron and copper upon fire retarding systems with a halogen-containing material, consisted of the cured product of the following typical curable compound formulation given in relative parts by weight: Polyethylene low density polyethylene, Sinclair Koppers Co. - 100 parts;
Antioxidant: polymerized 1,2 dihydro-2,2,4 trimethylquinoline (Agerite~ Resin D, R.T. Vanderbilt Co.) - 1 part; Curing -~ 20 coagent, triallyl cyanurate - 1 part; and Peroxide curing agent, ,~; di~ cumyl peroxide Di Cup ~ , Herculeæ Co.) - 3.5 parts.
To provide the halogen-containing material for the ;; fire retarding systems evaluated within the given polyethylene composition, 20 parts by weight of a commercial flame retardant, Hooker Chemical Company's Dechlorane~ 602, was combined with ` the said polyethylene formulation. DECHLORANE 602 is a Diels-Alder condensation reaction product betweel 1 mole of furan and 2 moles of hexachlorocyclopentadiene, having a chlorine content of 69.4 percent by weight and the structural formula of:
. ~
~ 30 ":~
_ 5 _ ~.;~
104~778 Cl Cl 41D-1380 Cl ~ ~3 Cl The flame resistance of the foregoing polyethylene composition containing 20 parts by weight of Dechlorane 602 as a standard, and also this base composition including antimony trioxide, zinc borate, or an oxide of this invention, and in some cases containing an additional halogen-containing material, were each measured by the Oxygen Index Test ~ASTM
D-2863-70). The halogen-containing materials and/or metal compounds added to the given base composition providing the standard, and the oxygen index values of the standard alone and including the added halogen-containing materials and/or metal compounds in the amounts specified are all given in the `;
following table of the fire retarding systems and their relative resistance to flame. All amounts of ingredients are in relative ,. ..
parts by weight, and in each instance the base composition is present in 125.5 parts by weight, in the relative proportions of ingredients set forth above.
; ~. .
~' ~ '.' . .
F ,~
~' :
.... . . .
-, . ' ' . .
1040'778 41D-1380 o ~
_, , N
O
o ~ ~a O ~
C) O
Q ~ S ~
e ,~
I ~ u"a O 1` O~
I
:F~ I ~D N
O
al ~ O
~1 . m s~
o a~
r~ H O _I
d~ ~
t~l U~ ~1 ~D . ~
O ~ ~
O ~ O
Nl N SJ 0 ~ o O
.: ~ I O "I
~, 0 ~,. 'O _I Q
_I
O S'~ ~
:, co e ` ~ ~u .: N ~ ,~
, :; . O ~ ~1 ~ m ~ ~
_ ~ o o ô o ` ~ 1 ~ N rl r~ N 0 . ~ X ~ ~ X ~ X
1 ~ ~ ~ ` ~ x o : ~. 0 ~ 5 0 0 ~
- o ~ .Q ~ X ~ ~ m ~
.;; o o x ~ ~o ~ ~ 0:;~ k E3 ~ ~- O ~ H O~1 :, O O O ~ XX 0 0 US-l I s~ ~ o u oo ,~ ~ e s.. F. ~ ~-~ u ~ ~
:' ~d ~ ~ X~ ~ U
m x ~ ~ ~ H HCJ N O ~It :
The polyethylene compositions of the standard and also including the additives of each examples were all prepared and heat cured with the peroxide curing agent in an identical manner. That is allingedients of the formulation, except the peroxide curing agent were irst blended by mixing at a roll temperature of about 200F for a period of about lO minutes on a two roll rubber mill, then the peroxide curing agent was added and mixing continued at a temperature of 200F for 3 minutes. Egual ~uantities of the blended composition of the standard and each sample was molded at about 1300 psi and 350F for about 45 minutes, thereby crosslink curing the poly-ethylene with the peroxide agent and forming a test specimen measuring 4~ inch X 4~ inch for evaluation of its flame re~i~tance by the oxygen index test procedure.
The improved, and more economical fire retarding systems comprising oxides of iron or copper of this invention are particularly applicable to polyolefin polymeric materials and composition~, either cured or uncured, comprising ethylene-containing polymers such as polyethylene, copolymers of ethylene and other polymerizable materials, and blends of polymers or copolymers of ethylene with other polymeric ~- materials such as ethylene-vinyl acetate, copolymers of ethylene and propylene and terpolymers of ethylene and propylene with a diene and the like.
The flame retarded polymeric compositions of this invention are suitable for use in the formation of a variety i;
of products and articles wherein resistance to flame is a factor. The compositions provided by this invention are particularly useful as flame resistant dielectric insulations and jackets for wire and cable and other electrical conductors.
The method of rendering polymeric materials or com-positions thereof resistant to flame and combustion according ~0~8 41D-1380 to this invention, comprises the addition and distribution of the components of the novel fire retarding system comprising a particulate oxide of iron or copper with a halogen-containing hydrocarbon throughout the mass of the polymer by any suitable mixing or compounding technique or apparatus.
The flame retarded composition of this invention may also include other conventional and typical ingredients, additives and agents, depending upon the intended service of the products formed therefrom, and their required or desired properties. For example other components may comprise preservatives, lubricants, mold release agents, pigments or coloring agents, fillers, processing aids, waterproofing agents, coupling agents, and additional flame proofing materials.
Although the invention has been described with reference to certain specific embodiments thereof, numerous modifications are possible and it is desired to cover all modifications falling within the spirit and scope of this invention.
:;, '' ''' ~: _ 9 _
Claims (10)
1. A flame resistant polyolefin polymeric com-position comprising a polymeric polyolefin including the com-bination of a halogen-containing hydrocarbon wherein said halogen is selected from chlorine and bromine with a particulate oxide of iron.
2. The flame resistant polyolefin polymeric composition of claim 1, wherein the halogen-containing hydrocarbon is present in the composition in an amount sufficient to provide from about 8 to about 50 percent by weight of halogen based upon the weight of the organic content of the composition and the oxide of iron is present in an amount of about 3 to about 15 percent by weight of the organic content of the composition.
3. The flame resistant polyolefin polymeric composition of claim 2, wherein the halogen-containing hydrocarbon is a Diels-Alder condensation product of 1 mole furan and 2 moles hexa-chlorocyclopentadiene.
4. The flame resistant polyolefin polymeric composition of claim 1, 3, wherein the metal oxide is present in an amount of from about 5 to about 10 percent by weight of the organic content of said composition.
5. The flame resistant polyolefin polymeric composition of claim 3, wherein the polyolefin is crosslink cured.
6. An electrical conductor having a flame resistant polymeric composition thereabout comprising a cross link cured ethylene-containing polymer including the combination of a halo-gen-containing hydrocarbon wherein said halogen is selected from chlorine and bromine with a particulate oxide of iron.
7. The electrical conductor combination of claim 6 wherein said flame resistant polymeric composition contains sufficient halogen-containing hydrocarbon to provide from about 8 to about 50 percent by weight of halogen based upon the weight of the organic content of the composition and the oxide of iron is present in an amount of about 3 to about 15 percent by weight of the organic content of the composition.
8. The electrical conductor of claim 7 wherein, in said flame resistant polymeric composition said halogen-con-taining hydrocarbon is a Diels-Alder condensation product of 1 mole furan and 2 moles hexachlorocyclopentadiene.
9. The electrical conductor of claim6, 7 or 8 wherein, in said flame resistant polymeric composition the oxide of iron is ferric oxide and is present in an amount of at from about 5 to about 10 percent by weight of the organic content of said composition.
10. The electrical conductor of claim 8 wherein, in said flame resistant polymeric composition, a brominated hydro-carbon is included.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US40038073A | 1973-09-26 | 1973-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1040778A true CA1040778A (en) | 1978-10-17 |
Family
ID=23583381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA207,339A Expired CA1040778A (en) | 1973-09-26 | 1974-08-19 | Iron oxide-organo halogen flame retardants for polyolefins |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1040778A (en) |
-
1974
- 1974-08-19 CA CA207,339A patent/CA1040778A/en not_active Expired
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