US4244858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flameproof polyamide moulding compositions
Assignee: Bayer AG
•
Filing: 1979-03-07
•
Granted: 1981-01-13
•
Expires: 1999-03-07
Abstract
Abstract Self-extinguishing, flameproved, reinforced and/or filled polyamide moulding compositions containing as flameproofing agents a combination of a phenol-aldehyde resin and an alkali metal - or ammonium - polyphosphate.
Inventors
- 👤 Peter Tacke
- 👤 Dieter Neuray
- 👤 Dietrich Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:49
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/32; C08L; C08L61/00; C08L61/04; C08L61/06; C08L77/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
67 words
A self-extinguishing thermoplastic moulding composition comprising (1) from 40 to 95% by weight of polyamides, (2) from 0.5 to 20% by weight of an alkali metal and/or ammonium polyphosphate, (3) from 0.5 to 20% by weight of a phenol-aldehyde resin, (4) from 10 to 50% by weight of a reinforcing material and/or filler, the sum of components (1) to (4) having to amount to 100% by weight.
Claim 2
Dependent Claim
67 words
A self-extinguishing thermoplastic moulding composition comprising (1) from 40 to 95% by weight of polyamides, (2) from 0.5 to 20% by weight of an alkali metal and/or ammonium polyphosphate, (3) from 0.5 to 20% by weight of a phenol-aldehyde resin, (4) from 10 to 50% by weight of a reinforcing material and/or filler, the sum of components (1) to (4) having to amount to 100% by weight.
Claim 3
Dependent Claim
18 words
A moulding composition as claimed in claim 1, containing from 50 to 80% by weight of component (1).
Claim 4
Dependent Claim
18 words
A moulding composition as claimed in claim 1, containing from 2 to 15% by weight of component (2).
Claim 5
Dependent Claim
18 words
A moulding composition as claimed in claim 1 containing from 2 to 15% by weight of component (3).
Claim 6
Dependent Claim
18 words
A moulding composition as claimed in claim 1 containing from 15 to 35% by weight of component (4).
Claim 7
Dependent Claim
22 words
A moulding composition as claimed in claim 1, wherein the phenol-aldehyde resin contains up to 25% by weight of a crosslinking agent.
Claim 8
Dependent Claim
20 words
A moulding composition as claimed in claim 1 wherein the phenol-aldehyde resin is in the form of a metal salt.
Claim 9
Dependent Claim
16 words
A moulding composition as claimed in claim 1, wherein the polyamide is polyamide-6 or polyamide 6,6.
Claim 10
Dependent Claim
20 words
A moulding composition as claimed in claim 1 wherein the reinforcing materials are glass or asbestos fibres or glass beads.
Claim 11
Dependent Claim
18 words
A moulding composition as claimed in claim 1 wherein the fillers are talcum, wallastonite, feldspars, chalk or quartz.
Claim 12
Dependent Claim
49 words
A moulding composition as claimed in claim 1, wherein the polyphosphate corresponds to the general formula H.sub.[(n-m)+2] (Me).sub.m P.sub.n O.sub.3n+1 wherein n is an integer of from 3 to 1000 the ratio of m to n amounts approximately to 1, Me is Li, Na, K or NH 4 .
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) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |