US4101510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant polymer
Assignee: BP Corp North America Inc
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Filing: 1977-03-09
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Granted: 1978-07-18
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Expires: 1997-03-09
Abstract
Abstract A fire retardant polymer which has a low halogen content is obtained by incorporating a vinyl aromatic containing a group reactive under Friedel-Crafts conditions and a Lewis acid or Lewis acid precursor within a thermoplastic composition.
Inventors
- 👤 James Spanswick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:52
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08K; C08K3/00; C08K3/01; C08K3/016; C08L23/00; C08L23/02; C08L25/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
106 words
A flame retardant thermoplastic composition comprising: (a) a thermoplastic resin comprising an effective amount of at least one substituted vinyl aromatic monomer and at least one monomer selected from the group consisting of ethylene, propylene, and styrene, whereinsaid substituted vinyl aromatic monomer has the structure: ##STR2## where X is --CH 2 Cl, --CH 2 Br, --CH 2 OH, --SO 3 H, ##STR3## --CHO, --CO 2 R, --CH(CH 3 ) 2 or --C(O)CH 3 and R is an alkyl group containing 1 to 6 carbon atoms; and (b) an effective amount of a Lewis acid or Lewis acid precursor, which forms a char that inhibits flame propagation.
Claim 2
Dependent Claim
106 words
A flame retardant thermoplastic composition comprising: (a) a thermoplastic resin comprising an effective amount of at least one substituted vinyl aromatic monomer and at least one monomer selected from the group consisting of ethylene, propylene, and styrene, whereinsaid substituted vinyl aromatic monomer has the structure: ##STR2## where X is --CH 2 Cl, --CH 2 Br, --CH 2 OH, --SO 3 H, ##STR3## --CHO, --CO 2 R, --CH(CH 3 ) 2 or --C(O)CH 3 and R is an alkyl group containing 1 to 6 carbon atoms; and (b) an effective amount of a Lewis acid or Lewis acid precursor, which forms a char that inhibits flame propagation.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein the substituted vinyl aromatic monomer is vinylbenzylchloride.
Claim 4
Dependent Claim
15 words
The composition of claim 1 wherein the substituted vinyl aromatic monomer is vinylbenzene sulphonic acid.
Claim 5
Dependent Claim
18 words
The composition of claim 2 wherein about 5 to 20 wt.% vinylbenzylchloride is copolymerized in the thermoplastic resin.
Claim 6
Dependent Claim
28 words
The composition of claim 1 wherein the Lewis acid or Lewis acid precursor is antimony oxide, stannous chloride, ferric chloride, zinc borate, or an antimony oxide-chlorinated paraffin mixture.
Claim 7
Dependent Claim
13 words
The composition of claim 4 wherein styrene is copolymerized in the thermoplastic resin.
Claim 8
Dependent Claim
15 words
The composition of claim 6 which contains about 2 to 20 wt.% of antimony oxide.
Claim 9
Dependent Claim
107 words
A flame retardant thermoplastic composition comprising: (a) a polymer blend comprising a thermoplastic resin selected from the group consisting of ethylene, propylene and styrene polymers, and an effective amount of a polymer of a substituted vinyl aromatic monomer, wherein said substituted vinyl aromatic monomer has the structure: ##STR4## where X is --CH 2 Cl, --CH 2 Br, --CH 2 OH, --SO 3 H, ##STR5## --CHO, --CO 2 R, --CH(CH 3 ) 2 or --C(O)CH 3 and R is an alkyl group having 1 to 6 carbon atoms; and (b) an effective amoung of Lewis acid or Lewis acid precursor, which forms a char that inhibits flame propagation.
Claim 10
Dependent Claim
107 words
A flame retardant thermoplastic composition comprising: (a) a polymer blend comprising a thermoplastic resin selected from the group consisting of ethylene, propylene and styrene polymers, and an effective amount of a polymer of a substituted vinyl aromatic monomer, wherein said substituted vinyl aromatic monomer has the structure: ##STR4## where X is --CH 2 Cl, --CH 2 Br, --CH 2 OH, --SO 3 H, ##STR5## --CHO, --CO 2 R, --CH(CH 3 ) 2 or --C(O)CH 3 and R is an alkyl group having 1 to 6 carbon atoms; and (b) an effective amoung of Lewis acid or Lewis acid precursor, which forms a char that inhibits flame propagation.
Claim 11
Dependent Claim
12 words
The composition of claim 8 wherein the thermoplastic resin is styrene polymer.
Claim 12
Dependent Claim
13 words
The composition of claim 8 wherein the substituted vinyl aromatic monomer is vinylbenzylchloride.
Claim 13
Dependent Claim
15 words
The composition of claim 8 wherein the substituted vinyl aromatic monomer is vinylbenzene sulphonic acid.
Claim 14
Dependent Claim
29 words
The composition of claim 8 wherein the Lewis acid or Lewis acid precursor is antimony oxide, stannous chloride, ferric chloride, zinc borate, or an antimony oxide chlorinated paraffin mixture.
Claim 15
Dependent Claim
14 words
The composition of claim 9 wherein the styrene polymer is a rubber-modified styrene polymer.
Claim 16
Dependent Claim
15 words
The composition of claim 9 which contains about 2 to 20 wt.% of antimony oxide.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |