US3929689A
Expired / Lapsed
US
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Foamed flame retardant polyolefin compositions of improved physical strength
Assignee: Phillips Petroleum Co
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Filing: 1974-07-05
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Granted: 1975-12-30
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Expires: 1994-07-05
Abstract
Abstract Foamed flame retardant polyolefin compositions having improved physical strength are obtained by the addition of a phenylbenzoate stabilizer to said compositions.
Inventors
- 👤 Roger J Walton
- 👤 Kenneth R Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:06
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J9/0014; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/02; C08K5/03; C08K5/04; C08K5/13; C08K5/56; C08K5/57; C08J2323/00; C08J2323/02; C08J2485/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
78 words
A FOAMED FLAME RETARDANT POLYOLEFIN COMPOSITION COMPRISING A POLYOLEFIN SELECTED FROM HOMOPOLYMERS DERIVED FROM THE POLYMERIZATION OF 1-MONOOLEFINS HAVING FROM 3 TO 8 CARBON ATOMS, AND COPOLYMERS DERIVED FROM THE POLYMERIZATION OF 1-MONOOLEFINS HAVING FROM 3 TO 8 CARBON ATOMS WITH A MINOR AMOUNT OF AT LEAST ONE 1-MONOOLEFIN HAVING FROM 2 TO 8 CARBON ATOMS; AN EFFECTIVE FLAME RETARDANT AMOUNT OF A HALOGENATED ORGANIC COMPOUND; AND AN EFFECTIVE STABILIZING AMOUNT OF A PHENYLBENZOATE STABILIZER HAVING THE FORMULA:
Claim 2
Dependent Claim
78 words
A FOAMED FLAME RETARDANT POLYOLEFIN COMPOSITION COMPRISING A POLYOLEFIN SELECTED FROM HOMOPOLYMERS DERIVED FROM THE POLYMERIZATION OF 1-MONOOLEFINS HAVING FROM 3 TO 8 CARBON ATOMS, AND COPOLYMERS DERIVED FROM THE POLYMERIZATION OF 1-MONOOLEFINS HAVING FROM 3 TO 8 CARBON ATOMS WITH A MINOR AMOUNT OF AT LEAST ONE 1-MONOOLEFIN HAVING FROM 2 TO 8 CARBON ATOMS; AN EFFECTIVE FLAME RETARDANT AMOUNT OF A HALOGENATED ORGANIC COMPOUND; AND AN EFFECTIVE STABILIZING AMOUNT OF A PHENYLBENZOATE STABILIZER HAVING THE FORMULA:
Claim 3
Dependent Claim
47 words
A composition in accordance with claim 1 wherein from about 3 to about 10 parts by weight of said halogenated organic compound and from about 0.1 to about 1.5 parts by weight of said phenylbenzoAte stabilizer are present for each 100 parts by weight of said polyolefin.
Claim 4
Dependent Claim
54 words
A composition in accordance with claim 2 wherein from 3 to 6 parts by weight of said halogenated organic compound, from 0.25 to 0.5 part by weight of said foaming agent, and from 0.3 to 0.5 part by weight of said phenylbenzoate stabilizer are present for each 100 parts by weight of said polyolefin.
Claim 5
Dependent Claim
12 words
A composition in accordance with claim 1 wherein said polyolefin is polypropylene.
Claim 6
Dependent Claim
28 words
A composition in accordance with claim 4, wherein said polypropylene is a homopolymer of propylene and said halogenated organic compound is selected from halogenated cycloalkanes and halogenated biscycloalkanes.
Claim 7
Dependent Claim
14 words
A composition in accordance with claim 5 wherein said phenylbenzoate stabilizer is 2,4-di-tertiary-butylphenyl 3,5-di-tertiarybutyl-4-hydroxybenzoate.
Claim 8
Dependent Claim
57 words
A composition in accordance with claim 1 wherein said halogenated organic compound has a halogen content of at least about 30 weight percent based on the total weight of the halogenated organic compound; and wherein said composition further comprises a metal oxide selected from oxides of arsenic, antimony, and bismuth; and a color inhibitor having the formula:
Claim 9
Dependent Claim
12 words
A composition in accordance with claim 7 wherein said polyolefin is polypropylene.
Claim 10
Dependent Claim
70 words
A composition in accordance with claim 8 wherein at least 3 parts by weight of said halogenated organic compound, at least 0.1 part by weight of said metal oxide, at least 0.2 part by weight of said color inhibitor, at least 0.25 part by weight of said foaming agent, and at least 0.3 part by weight of said phenylbenzoate stabilizer are present for each 100 parts by weight of polypropylene.
Claim 11
Dependent Claim
28 words
A composition in accordance with claim 9, wherein said polypropylene is a homopolymer of propylene and said halogenated organic compound is selected from halogenated cycloalkanes and halogenated biscycloalkanes.
Claim 12
Dependent Claim
55 words
A composition in accordance with claim 10 wherein said phenylbenzoate stabilizer is 2,4-di-tertiary-butylphenyl 3,5-di-tertiarybutyl-4-hydroxybenzoate, wherein said halogenated organic compound is 1,2-bis(3,4-dibromocyclohexyl)-1,2-dibromomethane, wherein said foaming agent is 1,1-azobisformamide, wherein said metal oxide is antimony trioxide, and wherein each R of said color inhibitor formula is a tertiary butyl radical and y is equal to about 2.
Claim 13
Independent Claim
95 words
A method of preparing foamed flame retardant polyolefin compositions having improved physical strength, said method comprising: admixing a polyolefin selected from homopolymers derived from the polymerization of 1-monoolefins having from 3 to 8 carbon atoms and copolymers derived from the polymerization of 1-monoolefins having from 3 to 8 carbon atoms with a minor amount of at least one 1-monoolefin having from 2 to 8 carbon atoms, an effective flame retardant amount of a halogenated organic compound, an effective amount of a foaming agent, and an effective stabilizing amount of a phenylbenzoate stabilizer having the formula:
Claim 14
Independent Claim
95 words
A method of preparing foamed flame retardant polyolefin compositions having improved physical strength, said method comprising: admixing a polyolefin selected from homopolymers derived from the polymerization of 1-monoolefins having from 3 to 8 carbon atoms and copolymers derived from the polymerization of 1-monoolefins having from 3 to 8 carbon atoms with a minor amount of at least one 1-monoolefin having from 2 to 8 carbon atoms, an effective flame retardant amount of a halogenated organic compound, an effective amount of a foaming agent, and an effective stabilizing amount of a phenylbenzoate stabilizer having the formula:
Claim 15
Dependent Claim
60 words
A method in accordance with claim 12 wherein from about 3 to about 10 parts by weight of said halogenated organic compound, from about 0.1 to about 1 part by weight of said foaming agent and from about 0.1 to about 1.5 parts by weight of said phenylbenzoate stabilizer are present for each 100 parts by weight of said polyolefin.
Claim 16
Dependent Claim
54 words
A method in accordance with claim 13 wherein from 3 to 6 parts by weight of said halogenated organic compound, from 0.25 to 0.5 part by weight of said foaming agent, and from 0.3 to 0.5 part by weight of said phenylbenzoate stabilizer are present for each 100 parts by weight of said polyolefin.
Claim 17
Dependent Claim
57 words
A method in accordance with claim 12 wherein said halogenated organic compound has a halogen content of at least about 30 weight percent based on the total weight of the halogenated organic compound; and wherein said composition further comprises a metal oxide selected from oxides of arsenic, antimony, and bismuth; and a color inhibitor having the formula:
Claim 18
Dependent Claim
76 words
A method in accordance with claim 15 wherein said polyolefin is polypropylene and wherein at least 3 parts by weight of said halogenated organic compound, at least 0.1 part by weight of said metal oxide, at least 0.2 part by weight of said color inhibitor, at least 0.25 part by weight of said foaming agent, and at least 0.3 part by weight of said phenylbenzoate stabilizer are present for each 100 parts by weight of polypropylene.
Claim 19
Dependent Claim
56 words
A method in accordance with claim 16 wherein said polyolefin is a homopolymer of propylene, said halogenated organic compound is 1,2-bis(3,4-di-bromocyclohexyl-1,2-dibromoethane, said phenylbenzoate is 2,4-di-tertiary-butylphenyl 3,5-di-tertiary-butyl-4-hydroxybenzoate, said foaming agent is 1,1-azobisformamide, said metal oxide is antimony trioxide, each R of said color inhibitor formula is a tertiary butyl radical and y is equal to about 2.
Claim 20
Dependent Claim
86 words
A foamable flame retardant polyolefin composition comprising a polyolefin selected from homopolymers derived from the polymerization of 1-monoolefins having from 3 to 8 carbon atoms, and copolymers derived from the polymerization of 1-monoolefins having from 3 to 8 carbon atoms with a minor amount of at least one 1-monoolefin having from 2 to 8 carbon atoms; an effective flame retardant amount of a halogenated organic compound; an effective foamable amount of a foaming agent; and an effective stabilizing amount of a phenylbenzoate stabilizer having the formula:
Claim 21
Dependent Claim
86 words
A foamable flame retardant polyolefin composition comprising a polyolefin selected from homopolymers derived from the polymerization of 1-monoolefins having from 3 to 8 carbon atoms, and copolymers derived from the polymerization of 1-monoolefins having from 3 to 8 carbon atoms with a minor amount of at least one 1-monoolefin having from 2 to 8 carbon atoms; an effective flame retardant amount of a halogenated organic compound; an effective foamable amount of a foaming agent; and an effective stabilizing amount of a phenylbenzoate stabilizer having the formula:
Claim 22
Dependent Claim
60 words
A composition in accordance with claim 18 wherein from about 3 to about 10 parts by weight of said halogenated organic compound, from about 0.1 to about 1 part by weight of said foaming agent, and from about 0.1 to about 1.5 parts by weight of said phenylbenzoate stabilizer are present for each 100 parts by weight of said polyolefin.
Claim 23
Dependent Claim
43 words
A composition in accordance with claim 2 wherein from 3 to 6 parts by weight of said halogenated organic compound, and from 0.3 to 0.5 part by weight of said phenylbenzoate stabilizer are present for each 100 parts by weight of said polyolefIn.
Claim 24
Dependent Claim
12 words
A composition in accordance with claim 3 wherein said polyolefin is polypropylene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |