Patent US4274995A successfully refreshed from Google Patents.
US4274995A
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US
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Filled polyolefin compositions having improved thermal stability
Assignee: Akzo America Inc
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Filing: 1979-12-31
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Granted: 1981-06-23
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Expires: 1999-12-31
Abstract
Abstract Filled polyolefin compositions having improved thermal stability characteristics are formed by incorporation therein of an effective amount for improvement of such a characteristic of a composition comprising a substantially neutral lower alkoxylated alkyl acid phosphate ester. In certain filled polyolefin compositions the phosphate ester composition also results in color improvement.
Inventors
- 👤 Joseph Silberberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
32 words
A filled polyolefin composition having improved thermal stability comprising a polyolefin resin, an inorganic filler, and an effective amount for said improved stability of a composition comprising an alkoxylated alkyl acid phosphate.
Claim 2
Dependent Claim
32 words
A filled polyolefin composition having improved thermal stability comprising a polyolefin resin, an inorganic filler, and an effective amount for said improved stability of a composition comprising an alkoxylated alkyl acid phosphate.
Claim 3
Dependent Claim
24 words
A composition as claimed in claim 1 wherein the polyolefin is present at from about 30% to about 95%, by weight of the composition.
Claim 4
Dependent Claim
24 words
A composition as claimed in claim 1 wherein the filler is present at from about 5% to about 70%, by weight of the composition.
Claim 5
Dependent Claim
25 words
A composition as claimed in claim 1 wherein the phosphate composition is present at from about 0.1% to about 3%, by weight of the filler.
Claim 6
Dependent Claim
20 words
A composition as claimed in claim 1 wherein the polyolefin is selected from the group consisting of polyethylene and polypropylene.
Claim 7
Dependent Claim
22 words
A composition as claimed in claim 1 wherein the filler is selected from the group consisting of the silicates and metal carbonates.
Claim 8
Dependent Claim
28 words
A composition as claimed in either claim 1, 2, 3, 4, 5, or 6 wherein the filler is selected from the group consisting of talc and calcium carbonate.
Claim 9
Dependent Claim
67 words
A composition as claimed in either claim 1, 2, 3, 4, 5, or 6 wherein the phosphate has the formula: ##STR2## where x is an integer of from 1 to 5, m and n are either 1 or 2, with the sum of m and n being 3, R is a C 1 -C 20 alkyl group, and R' is a C 2 -C 5 alkyl group.
Claim 10
Dependent Claim
42 words
A composition as claimed in either claim 1, 2, 3, 4, 5, or 6 wherein the phosphate composition comprises a mixture of di(2-ethylhexyl)hydroxyethyl phosphate and mono(2-ethylhexyl)hydroxyethyl polyoxyethylene phosphate and the filler is selected from the group consisting of talc and calcium carbonate.
References Cited (Backward Citations)
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Cited
US3792008A
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US4098752A
Cited
US4116897A
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US4174340A
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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) | 1984-06-22 | 1984-12-22 | 1985-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-22 | 1988-12-22 | 1989-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-22 | 1992-12-22 | 1993-06-23 | $7700.00 | Window Closed / Lapsed |