Patent US4145330A successfully refreshed from Google Patents.
US4145330A
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US
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Flame retardant polypivalolactone compositions
Assignee: Albemarle Corp
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Filing: 1977-11-14
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Granted: 1979-03-20
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Expires: 1997-11-14
Abstract
Abstract Flame retardant thermoplastic compositions containing polypivalolactone resin, an inorganic phosphate, and optionally a fiberglass filler and a polybrominated aromatic compound.
Inventors
- 👤 Paul A. Zorzi
- 👤 Thomas S. Allen
- 👤 Michael E. Kucsma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:33
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/32; C08L; C08L67/00; C08L67/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
28 words
A thermoplastic composition which comprises polypivalolactone resin and an inorganic ammonium polyphosphate present in an amount up to about 45 phr sufficient to render the composition flame resistant.
Claim 2
Dependent Claim
28 words
A thermoplastic composition which comprises polypivalolactone resin and an inorganic ammonium polyphosphate present in an amount up to about 45 phr sufficient to render the composition flame resistant.
Claim 3
Dependent Claim
21 words
The composition of claim 1 including a non-dripping additive selected from the group consisting of fumed silica, asbestos and calcium hydroxide.
Claim 4
Dependent Claim
22 words
A composition of claim 1 wherein said composition also includes from 10 phr to 60 phr by weight of a reinforcing filler.
Claim 5
Dependent Claim
20 words
The composition of claim 3 wherein the amount of reinforcing filler is from about 30 phr to about 50 phr.
Claim 6
Dependent Claim
12 words
The composition of claim 3 in which the reinforcing filler is fiberglass.
Claim 7
Dependent Claim
21 words
The composition of claim 3 in which the amount of said polyphosphate is from about 10 phr to about 20 phr.
Claim 8
Dependent Claim
21 words
A composition of claim 3 which also contains from about 1 phr to about 20 phr of a polybrominated aromatic compound.
Claim 9
Dependent Claim
13 words
The composition of claim 7 wherein the polybrominated aromatic compound is decabromodiphenyl oxide.
Claim 10
Dependent Claim
12 words
The composition of claim 7 wherein the polybrominated aromatic compound is bis(dimethoxyphosphinyl)tetrabromo-p-xylene.
Claim 11
Dependent Claim
51 words
A thermoplastic composition which comprises polypivalolactone resin having a limiting viscosity number in the range of from about 0.8 to about 2.5, a reinforcing amount of glass fiber reinforcing agent, and an inorganic ammonium polyphosphate present in an amount up to about 30 phr sufficient to render the composition flame resistant.
Claim 12
Dependent Claim
51 words
A thermoplastic composition which comprises polypivalolactone resin having a limiting viscosity number in the range of from about 0.8 to about 2.5, a reinforcing amount of glass fiber reinforcing agent, and an inorganic ammonium polyphosphate present in an amount up to about 30 phr sufficient to render the composition flame resistant.
Claim 13
Dependent Claim
23 words
A composition of claim 10 wherein said composition additionally includes from about 1 phr to about 20 phr of a polybrominated aromatic compound.
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) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |