US4871795A
Expired / Lapsed
US
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Flame retardant additive for thermoplastics
Assignee: General Electric Co
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Filing: 1988-07-22
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Granted: 1989-10-03
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Expires: 2008-07-22
Abstract
Abstract There is provided a flame retardant for thermoplastic resins comprising (i) 20 to 60% by weight a silicone oil; (ii) 10 to 40% by weight a silicone resin; (iii) 5 to 60% by weight a gassing agent selected from the group consisting of compounds containing both phosphorus and nitrogen or a mixture of phosphorus containing compounds with nitrogen containing compounds and (iv) a polyhydric alcohol in a weight ratio to said gassing agent ranging from about 1/9 to about 1/5.
Inventors
- 👤 Prakash K. Pawar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:25
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/32; C08L; C08L101/00
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
100 words
A flame retarded composition comprising: (A) 100 parts by weight a thermoplastic resin and (B) from about 2 to about 30 parts by weight a flame retardant additive comprising: (i) 20 to 60% by weight of a silicone oil; (ii) 10 to 40% by weight a silicone resin; (iii) 5 to 60% by weight a gassing agent selected from the group consisting of compounds containing both phosphorus and nitrogen or a mixture of phosphorus containing compounds with nitrogen containing compounds; and (iv) a polyhydric alcohol in a weight ratio to said gassing agent ranging from about 1/9 to about 1/2.6.
Claim 2
Dependent Claim
100 words
A flame retarded composition comprising: (A) 100 parts by weight a thermoplastic resin and (B) from about 2 to about 30 parts by weight a flame retardant additive comprising: (i) 20 to 60% by weight of a silicone oil; (ii) 10 to 40% by weight a silicone resin; (iii) 5 to 60% by weight a gassing agent selected from the group consisting of compounds containing both phosphorus and nitrogen or a mixture of phosphorus containing compounds with nitrogen containing compounds; and (iv) a polyhydric alcohol in a weight ratio to said gassing agent ranging from about 1/9 to about 1/2.6.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein said thermoplastic resin is polyolefin.
Claim 4
Dependent Claim
27 words
The composition of claim 1 wherein said silicone oil is an essentially linear polydimethylsiloxane polymer having a viscosity between about 90,000 and 150,000 centipoise at 25° C.
Claim 5
Dependent Claim
52 words
The composition of claim 1 wherein said silicone resin is an MQ resin comprised of monofunctional M units of the average formula R 3 SiO 0 .5 and tetrafunctional Q units of the average formula SiO 2 , and having an average ratio of, approximately, 0.3 to 4.0M units per Q unit.
Claim 6
Dependent Claim
17 words
The composition of claim 1 wherein said gassing agent is a compound containing both phosphorus and nitrogen.
Claim 7
Dependent Claim
33 words
The composition of claim 5 wherein said gassing agent is selected from the group consisting of ammonium polyphosphates, ammonium phosphates, ammonium pyrophosphates, ammonium phosphites, ammonium hypophosphates, ammonium hypophosphites, ammonium metaphosphates, ammonium dihydrogen phosphites.
Claim 8
Dependent Claim
20 words
The composition of claim 1 wherein said gassing agent is a mixture of phosphorus containing compounds and nitrogen containing compounds.
Claim 9
Dependent Claim
32 words
The composition of claim 1 wherein said flame retardant additive is present in an amount ranging from about 10 to about 25 parts by weight per 100 parts by weight thermoplastic resin.
Claim 10
Dependent Claim
23 words
The composition of claim 2 wherein said polyhydric alcohol is selected from the group consisting of pentaerythritol, dipentaerythritol, tripentaerythritol, pentitols, hexitols, and saccharides.
Claim 11
Dependent Claim
75 words
A flame retardant additive comprising: (i) 20 to 60% by weight a silicone oil; (ii) 10 to 40% by weight a silicone resin; (iii) 5 to 60% by weight a gassing agent selected from the group consisting of compounds containing both phosphorus and nitrogen or a mixture of phosphorus containing compounds with nitrogen containing compounds; and (iv) a polyhydric alcohol in a weight ratio to said gassing agent ranging from about 1/9 to about 1/2.6.
Claim 12
Dependent Claim
75 words
A flame retardant additive comprising: (i) 20 to 60% by weight a silicone oil; (ii) 10 to 40% by weight a silicone resin; (iii) 5 to 60% by weight a gassing agent selected from the group consisting of compounds containing both phosphorus and nitrogen or a mixture of phosphorus containing compounds with nitrogen containing compounds; and (iv) a polyhydric alcohol in a weight ratio to said gassing agent ranging from about 1/9 to about 1/2.6.
Claim 13
Dependent Claim
27 words
The composition of claim 10 wherein said silicone oil is an essentially linear polydimethylsiloxane polymer having a viscosity between about 90,000 and 150,000 centipoise at 25° C.
Claim 14
Dependent Claim
52 words
The composition of claim 10 wherein said silicone resin is an MQ resin comprised of monofunctional M units of the average formula R 3 SiO 0 .5 and tetrafunctional Q units of the average formula SiO 2 , and having an average ratio of, approximately, 0.3 to 4.0M units per Q unit.
Claim 15
Dependent Claim
17 words
The composition of claim 10 wherein said gassing agent is a compound containing both phosphorus and nitrogen.
Claim 16
Dependent Claim
33 words
The composition of claim 13 wherein said gassing agent is selected from the group consisting of ammonium polyphosphates, ammonium phosphates, ammonium pyrophosphates, ammonium phosphites, ammonium hypophosphates, ammonium hypophosphites, ammonium metaphosphates, ammonium dihydrogen phosphites.
Claim 17
Dependent Claim
20 words
The composition of claim 10 wherein said gassing agent is a mixture of phosphorus containing compounds and nitrogen containing compounds.
Claim 18
Dependent Claim
23 words
The composition of claim 11 wherein said polyhydric alcohol is selected from the group consisting of pentaerythritol, dipentaerythritol, tripentaerythritol, pentitols, hexitols, and saccharides.
Claim 19
Dependent Claim
91 words
A process for flame retarding thermoplastic resin comprising the step of (A) melt blending with said thermoplastic resin a flame retardant additive comprising: (i) 20 to 60% by weight a silicone oil; (ii) 10 to 40% by weight a silicone resin; (iii) 5 to 60% by weight a gassing agent selected from the group consisting of compounds containing both phosphorus and nitrogen or a mixture of phosphorus containing compounds with nitrogen containing compounds; and (iv) a polyhydric alcohol in a weight ratio to said gassing agent ranging from about 1/9 to1/2.6.
Claim 20
Dependent Claim
91 words
A process for flame retarding thermoplastic resin comprising the step of (A) melt blending with said thermoplastic resin a flame retardant additive comprising: (i) 20 to 60% by weight a silicone oil; (ii) 10 to 40% by weight a silicone resin; (iii) 5 to 60% by weight a gassing agent selected from the group consisting of compounds containing both phosphorus and nitrogen or a mixture of phosphorus containing compounds with nitrogen containing compounds; and (iv) a polyhydric alcohol in a weight ratio to said gassing agent ranging from about 1/9 to1/2.6.
Claim 21
Dependent Claim
17 words
The process of claim 17 wherein said melt temperature is between about 250° F. and 600° F.
Claim 22
Dependent Claim
27 words
The process of claim 17 wherein said silicone oil is an essentially linear polydimethylsiloxane polymer having a viscosity between about 90,000 and 150,000 centipoise at 25° C.
Claim 23
Dependent Claim
52 words
The process of claim 17 wherein said silicone resin is an MQ resin comprised of monofunctional M units of the average formula R 3 SiO 0 .5 and tetrafunctional Q units of the average formula SiO 2 , and having an average ratio of, approximately, 0.3 to 4.0M units per Q unit.
Claim 24
Dependent Claim
17 words
The process of claim 17 wherein said gassing agent is a compound containing both phosphorus and nitrogen.
Claim 25
Dependent Claim
33 words
The process of claim 21 wherein said gassing agent is selected from the group consisting of ammonium polyphosphates, ammonium phosphates, ammonium pyrophosphates, ammonium phosphites, ammonium hypophosphates, ammonium hypophosphites, ammonium metaphosphates, ammonium dihydrogen phosphites.
Claim 26
Dependent Claim
20 words
The process of claim 17 wherein said gassing agent is a mixture of phosphorus containing compounds and nitrogen containing compounds.
Claim 27
Dependent Claim
23 words
The process of claim 20 wherein said polyhydric alcohol is selected from the group consisting of pentaerythritol, dipentaerythritol, tripentaerythritol, pentitols, hexitols, and saccharides.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |