US3931101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flameproof moulding compositions based on polyolefins
Assignee: Hoechst AG
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Filing: 1973-05-21
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Granted: 1976-01-06
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Expires: 1993-05-21
Abstract
Abstract Flameproof moulding compositions, which are based on polyolefins and made from a pulverulent blend comprising a polyolefin as its essential ingredient and a plurality of flame-retardant ingredients. The flame-retardant ingredients comprise red phosphorus and at least one organic nitrogen compound which carbonizes after inflammation. The moulding compositions contain the flame-retardant ingredients in a total proportion of at most about 30 weight %. Red phosphorus and organic nitrogen compound are used in a quantitative ratio between 99:1 and 1.99.
Inventors
- 👤 Franz-Josef Dany
- 👤 Joachim Wortmann
- 👤 Peter Munch
- 👤 Gunther Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:20
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/16; C08K5/17; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/26; C08L23/28; C08L23/286; C08K3/01; C08K3/016
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
50 words
A flameproof molding composition comprising a pulverulent blend of a polyolefin and a plurality of flame retardants consisting of, in addition to red phosphorus, melamine, the amount of flame retardants being about 10-30 weight % of said composition, the quantitative ratio of red phosphorus and melamine being 1:1 - 3:1.
Claim 2
Dependent Claim
50 words
A flameproof molding composition comprising a pulverulent blend of a polyolefin and a plurality of flame retardants consisting of, in addition to red phosphorus, melamine, the amount of flame retardants being about 10-30 weight % of said composition, the quantitative ratio of red phosphorus and melamine being 1:1 - 3:1.
Claim 3
Dependent Claim
15 words
The moulding composition as claimed in claim 1, wherein the polyolefin is polyethylene or polypropylene.
Claim 4
Dependent Claim
19 words
The molding composition as claimed in claim 1, wherein the red phosphorus has a particle size of 75-200 microns.
Claim 5
Dependent Claim
18 words
The moulding composition as claimed in claim 1, wherein the melamine has a particle size of 75-200 microns.
Claim 6
Dependent Claim
19 words
The moulding composition as claimed in claim 1, wherein the quantitative ratio of red phosphorus and melamine is 1:1.
References Cited (Backward Citations)
US2544706A
Cited
US2603614A
Cited
US3666715A
Cited
US3714114A
Cited
US3819575A
Cited
US3808127A
Cited
US3810862A
Cited
US3810850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |