US3711520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant compositions
Assignee: General Electric Co
•
Filing: 1970-09-04
•
Granted: 1973-01-16
•
Expires: 1990-09-04
Abstract
Abstract A silicone elastomer stock which exhibits improved flame resistance in the cured state consists essentially of a silicone elastomer, a filler, a small amount of a flame retardant material selected from the group consisting of platinum and platinum compounds and a Group II metal oxide.
Inventors
- 👤 C Pfeifer
- 👤 W Bobear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:58
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/08; C08K3/18; C08K3/20; C08K3/22; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
6 words
The cured product of claim 1.
Claim 2
Dependent Claim
17 words
a finely divided, non-alkaline inorganic filler in an amount of from 10 to 300 parts, by weight,
Claim 3
Dependent Claim
17 words
a finely divided, non-alkaline inorganic filler in an amount of from 10 to 300 parts, by weight,
Claim 4
Dependent Claim
27 words
small, but effective amount to impart flame retardancy of a platinum containing material not exceeding 250 parts per million by weight based on the organopolysiloxane gum, and
Claim 5
Dependent Claim
27 words
small, but effective amount to impart flame retardance of a platinum containing material not exceeding 250 parts per million by weight based on the organopolysiloxane gum, and
Claim 6
Dependent Claim
22 words
The composition of claim 1 further characterized by the inorganic filler being present in an amount of from 40 to 125 parts.
Claim 7
Dependent Claim
36 words
The composition of claim 1 further characterized by the platinum-containing material being present in a range to provide from about 1 to about 25 parts per million, by weight based on the organopolysiloxane gum, of platinum.
Claim 8
Dependent Claim
31 words
a small but effective amount to improve flame retardancy of the above composition of a Group II metal oxide not to exceed 100 parts by weight based on the organopolysiloxane gum.
Claim 9
Dependent Claim
31 words
a small but effective amount to improve flame retardancy of the above composition of a Group II metal oxide not to exceed 100 parts by weight based on the organopolysiloxane gum.
Claim 10
Dependent Claim
18 words
The composition of claim 1 further characterized by the phenyl-to-silicon ratio being from about 0.01 to about 0.4.
Claim 11
Dependent Claim
19 words
The composition of claim 1 further characterized by the ratio of phenyl-to-silicon being from about 0.03 to about 0.1
Claim 12
Dependent Claim
46 words
The composition of claim 1 further characterized by the inorganic filler being fumed silica and the Group II metal oxide being zinc oxide. 8 The composition of claim 7 further characterized by the zinc oxide being present in an amount of from 1 to 15 parts.
Claim 13
Dependent Claim
18 words
The composition of claim 1 further characterized by from 0.01 to 1 part of magnesium oxide being present.
Claim 14
Dependent Claim
25 words
The composition of claim 1 further characterized by the ratio of phenyl groups to silicon in the polysiloxane being from about 0.01 to about 0.08.
Claim 15
Dependent Claim
16 words
A composition of matter which in a cured state exhibits improved flame-retardant properties, the composition comprising:
References Cited (Backward Citations)
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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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |