US4224217A
Expired / Lapsed
US
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Combustion resistant aromatic polymers containing char-forming benzyl and/or allyl moieties
Assignee: Dow Chemical Co
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Filing: 1978-01-05
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Granted: 1980-09-23
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Expires: 1998-01-05
Abstract
Abstract The char-forming characteristics of aromatic polymers containing one or more combustion resistant components are improved by incorporating therein a polybenzyl, a polyallyl, or an allyl/benzyl moiety. As an example, a styrene polymer comprising a halogenated comonomer such as bromostyrene is rendered char-forming by the presence of copolymerized vinylbenzyl chloride in the styrene polymer. Such polymeric compositions are useful in the manufacture of shaped articles such as housings for electrical appliances.
Inventors
- 👤 Kent S. Dennis
- 👤 Joseph W. Raksis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:29
CPC Classifications
C; C08; C08K; C08K5/00; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L25/18
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
78 words
A char-forming aromatic polymer composition comprising (1) a normally solid aromatic polymer containing polymerized bromostyrene in an amount to reduce the flame propagation characteristics of the aromatic polymer and dispersed in said composition (2) a char-forming amount in the range from about 0.1 to about 1.5 milliequivalents of a plurality of active benzyl and/or active allyl moieties per gram of the composition and (3) an inorganic compound in an amount effective to enhance char formation of the composition.
Claim 2
Dependent Claim
78 words
A char-forming aromatic polymer composition comprising (1) a normally solid aromatic polymer containing polymerized bromostyrene in an amount to reduce the flame propagation characteristics of the aromatic polymer and dispersed in said composition (2) a char-forming amount in the range from about 0.1 to about 1.5 milliequivalents of a plurality of active benzyl and/or active allyl moieties per gram of the composition and (3) an inorganic compound in an amount effective to enhance char formation of the composition.
Claim 3
Dependent Claim
35 words
The composition of claim 1 wherein the aromatic polymer is a monovinylidene aromatic polymer and has dispersed therein a plurality of active benzyl moieties, said composition containing a combustion-resistant amount of a halogenated organic moiety.
Claim 4
Dependent Claim
33 words
The composition of claim 2 wherein the aromatic polymer is a styrene polymer containing at least 50 mole percent of polymerized styrene having dispersed therein polymerized vinylbenzyl moieties and a brominated organic moiety.
Claim 5
Dependent Claim
42 words
The composition of claim 2 wherein the plurality of benzyl moieties is a polymer of at least one of pentachlorophenyl vinylbenzyl ether, and tribromophenyl vinylbenzyl ether wherein said benzyl polymer supplies a part of said combustion resistant amount of halogenated organic moiety.
Claim 6
Dependent Claim
16 words
The composition of claim 4 comprising from about 2 to about 50 weight percent of halogen.
Claim 7
Dependent Claim
17 words
The composition of claim 3 wherein the benzylic moieties are an integral part of the aromatic polymer.
Claim 8
Dependent Claim
17 words
The composition of claim 1 wherein the aromatic polymer is an aromatic polycarbonate or an ABS resin.
Claim 9
Dependent Claim
21 words
The composition of claim 1 wherein the aromatic polymer is a styrene polymer and the benzyl moiety is a benzyl chloride.
Claim 10
Dependent Claim
22 words
The composition of claim 1 wherein the inorganic compound is an oxide of iron, nickel, copper, chromium, cobalt, zirconium, molybdenum or manganese.
Claim 11
Dependent Claim
66 words
A char-forming aromatic polymer composition comprising (1) a normally solid aromatic polymer and dispersed in said composition (2) a char-forming amount in the range from about 0.1 to about 1.5 milliequivalents of a plurality of active benzyl and/or active allyl moieties per gram of the composition and (3) a metal ferri or ferro cyanide salt in an amount effective to enhance char formation of the composition.
Claim 12
Dependent Claim
66 words
A char-forming aromatic polymer composition comprising (1) a normally solid aromatic polymer and dispersed in said composition (2) a char-forming amount in the range from about 0.1 to about 1.5 milliequivalents of a plurality of active benzyl and/or active allyl moieties per gram of the composition and (3) a metal ferri or ferro cyanide salt in an amount effective to enhance char formation of the composition.
Claim 13
Dependent Claim
15 words
The composition of claim 10 which also contains a further char-promoting amount of calcium oxide.
Claim 14
Dependent Claim
32 words
The composition of claim 10 wherein the metal of the metal ferric or ferro cyanide salt is an alkali metal, nickel, calcium, barium, copper, chromium cobalt, zinc, manganese, magnesium and mixtures thereof.
Claim 15
Dependent Claim
49 words
The composition of claim 12 wherein the metal ferric or ferro cyanide salt is Ni 3 [Fe(CN) 6 ] 2 , K 4 Fe(CN) 6 , K 2 Ni 3 [Fe(CN) 6 ] 2 , K 2 Zn 3 [Fe(CN) 6 ] 2 or K 2 CaFe(CN) 6 .
Claim 16
Dependent Claim
71 words
A char-forming aromatic polymer composition comprising (1) a normally solid aromatic polymer and dispersed in said composition, (2) a char-forming amount in the range from about 0.1 to about 1.5 milliequivalents of a plurality of active benzyl and/or active allyl moieties per gram of the composition and (3) an acetyl acetonate of copper, cobalt, manganese, vanadium, nickel, chromium or iron in an amount effective to enhance char formation of the composition.
Claim 17
Dependent Claim
71 words
A char-forming aromatic polymer composition comprising (1) a normally solid aromatic polymer and dispersed in said composition, (2) a char-forming amount in the range from about 0.1 to about 1.5 milliequivalents of a plurality of active benzyl and/or active allyl moieties per gram of the composition and (3) an acetyl acetonate of copper, cobalt, manganese, vanadium, nickel, chromium or iron in an amount effective to enhance char formation of the composition.
Claim 18
Dependent Claim
30 words
The composition of claim 13 wherein the metal ferric or ferro cyanide salt is present in an amount from about 1 to about 20 weight percent based on the composition.
Claim 19
Dependent Claim
21 words
The composition of claim 15 which also contains a further char-promoting amount of an oxide of calcium, strontium, magnesium or barium.
Claim 20
Dependent Claim
17 words
The composition of claim 10 wherein the aromatic polymer is an aromatic polycarbonate or an ABS resin.
Claim 21
Dependent Claim
21 words
The composition of claim 10 wherein the aromatic polymer is a styrene polymer and the benzyl moiety is a benzyl chloride.
Claim 22
Dependent Claim
35 words
The composition of claim 10 wherein the aromatic polymer is a monovinylidene aromatic polymer and has dispersed therein a plurality of active benzyl moieties, said composition containing a combustion-resistant amount of a halogenated organic moiety.
Claim 23
Dependent Claim
33 words
The composition of claim 19 wherein the aromatic polymer is a styrene polymer containing at least 50 mole percent of polymerized styrene having dispersed therein polymerized vinylbenzyl moieties and a brominated organic moiety.
Claim 24
Dependent Claim
42 words
The composition of claim 19 wherein the plurality of benzyl moieties is a polymer of at least one of pentachlorophenyl vinylbenzyl ether and tribromophenyl vinylbenzyl ether wherein said benzyl polymer supplies a part of said combustion resistant amount of halogenated organic moiety.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |