Patent US4743644A successfully refreshed from Google Patents.
US4743644A
Expired / Lapsed
US
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Stabilized-alumina filled thermoplastics
Assignee: Tyco Electronics UK Ltd
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Filing: 1987-03-23
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Granted: 1988-05-10
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Expires: 2007-03-23
Abstract
Abstract A water stabilizer polymeric composition incorporating a hydrated alumina filler, which is characterized by the presence of an effective amount of an antimony V compound. The compositions have a reduced tendency to absorb water and specific compositions find applicaiton as electrical insulation and in the production of dimensionally recoverable article.
Inventors
- 👤 Richard S. Skipper
- 👤 Richard J. Penneck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:02
CPC Classifications
C; C08; C08K; C08K9/00; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/2279; H; H01; H01B; H01B3/00; H01B3/002; H01B3/006
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
60 words
A water stabilized polymeric composition suitable for use as electrical insulation comprising (a) a polymer, (b) 5 to 80%, based on the weight of the composition, of a hydrated alumina filler, and (c) a sodium-reactive antimony V compound in an amount effective to improve the water stability of the compositon, the composition having less than 15% by weight halogen content.
Claim 2
Dependent Claim
60 words
A water stabilized polymeric composition suitable for use as electrical insulation comprising (a) a polymer, (b) 5 to 80%, based on the weight of the composition, of a hydrated alumina filler, and (c) a sodium-reactive antimony V compound in an amount effective to improve the water stability of the compositon, the composition having less than 15% by weight halogen content.
Claim 3
Dependent Claim
21 words
A composition according to claim 1, in which the hydrated alumina is alumina trihydrate Al 2 O 3 .3H 2 O.
Claim 4
Dependent Claim
29 words
A composition according to claim 1, in which the hydrated alumina has a surface area of from 2 to 40 M 2 /g as measured by the B.E.T. method.
Claim 5
Dependent Claim
28 words
A composition according to claim 1, in which the hydrated alumina is present in an amount of from 20 to 70% based on the weight of the composition.
Claim 6
Dependent Claim
22 words
A composition according to claim 1, in which the antimony V compound is a hydrated antimony V oxide or a precursor thereof.
Claim 7
Dependent Claim
32 words
A composition according to claim 1, in which the antimony V compound is present in an amount of from 0.1 to 10 weight per cent, based on the weight of the composition.
Claim 8
Dependent Claim
32 words
A composition according to claim 1, in which the antimony V compound is present in an amount of from 10 to 25 weight per cent, based on the weight of the composition.
Claim 9
Dependent Claim
21 words
A composition according to claim 1, in which the hydrated alumina has been treated with a silane or titanate coupling agent.
Claim 10
Dependent Claim
22 words
A composition according to claim 1, in which the hydrated alumina has been pre-treated to reduce the level of sodium impurity therein.
Claim 11
Dependent Claim
47 words
A composition according to claim 9, in which the hydrated alumina has been pre-treated by washing with water or an aqueous medium to reduce the total sodium level therein to less than 1000 ppm measured as Na 2 O, based on the weight of the hydrated alumina.
Claim 12
Dependent Claim
30 words
A composition according to claim 9, in which the hydrated alumina has been pre-treated with a sodium complexing or chelating agent and washed to remove water soluble compounds thus formed.
Claim 13
Dependent Claim
18 words
A composition according to claim 11, in which the sodium complexing or chelating agent is zinc uranyl acetate.
Claim 14
Dependent Claim
18 words
A composition according to claim 1, which comprises a vinyl ester homo--or copolymer or a (meth)acrylate homo--or copolymer.
Claim 15
Dependent Claim
43 words
A composition according to claim 1, which comprises a polymer blend comprising a vinyl ester homo--or copolymer, a (meth)acrylate homo--or copolymer, a substituted or unsubstituted polyalkene or alkene copolymer, a segmented polyether ester copolymer, a silicone resin or elastomer, or an acrylic elastomer.
Claim 16
Dependent Claim
45 words
A composition according to claim 14, which comprises a vinyl ester homo--or copolymer or (meth)acrylate homo-- or copolymer, and wherein the vinyl ester homo-or copolymer is present in an amount of from 30 to 99 weight percent based on the total weight of polymers present.
Claim 17
Dependent Claim
14 words
A water stabilized dimensionally recoverable article comprising a polymeric composition according to claim 1.
Claim 18
Dependent Claim
13 words
Electrical equipment incorporating as electrical insulation a polymeric composition according to claim 1.
Claim 19
Dependent Claim
37 words
A water stablized polymeric composition according to claim 1, wherein at least one of (b) or (c) is coated with a reagent which can chemically react with or physically bond to the surface of the other component.
Claim 20
Dependent Claim
22 words
A composition according to claim 18, wherein the reagent is an acid, a reactive functional acid derivative, or a complex chelating agent.
Claim 21
Dependent Claim
21 words
A composition according to claim 18, in which the hydrated alumina is alumina trihydrate Al 2 O 3 .3H 2 O.
Claim 22
Dependent Claim
22 words
A composition according to claim 18, in which the antimony V compound is a hydrated antimony V oxide or a precursor thereof.
Claim 23
Dependent Claim
32 words
A composition according to claim 18, in which the antimony V compound is present in an amount of from 0.1 to 10 weight per cent, based on the weight of the composition.
Claim 24
Dependent Claim
32 words
A composition according to claim 18, in which the antimony V compound is present in an amount of from 10 to 25 weight per cent, based on the weight of the composition.
Claim 25
Dependent Claim
16 words
A composition according to claim 19, in which the acid is acrylic acid or citric acid.
Claim 26
Dependent Claim
17 words
A composition according to claim 19, in which the complexing or chelating agent is a polydentate ligand.
Claim 27
Dependent Claim
19 words
A composition according to claim 25, in which the polydentate ligand is a B-polyketonate or an imine derivative thereof.
Claim 28
Dependent Claim
29 words
A composition according to claim 18, in which the amount or reagent(s) employed is from 1 to 10 weight per cent based on the weight of the hydrated alumina.
Claim 29
Dependent Claim
39 words
A composition according to claim 18, in which the hydrated alumina has been pre-treated to reduce the total sodium level therein to less than 1000 ppm measured as Na 2 O, based on the weight of the hydrated alumina.
Claim 30
Dependent Claim
30 words
A composition according to claim 18, in which the hydrated alumina has been pre-treated with a sodium complexing or chelating agent and washed to remove water soluble compounds thus formed.
Claim 31
Dependent Claim
18 words
A composition according to claim 29, in which the sodium complexing or chelating agent is zinc uranyl acetate.
Claim 32
Dependent Claim
18 words
A composition according to claim 18, which comprises a vinyl ester homo--or copolymer or a (meth)acrylate homo--or copolymer.
Claim 33
Dependent Claim
43 words
A composition according to claim 18, which comprises a polymer blend comprising a vinyl ester homo--or copolymer, a (meth)acrylate homo--or copolymer, a substituted or unsubstituted polyalkene or alkene copolymer, a segmented polyether ester copolymer, a silicone resin or elastomer, or an acrylic elastomer.
Claim 34
Dependent Claim
14 words
A water stabilized dimensionally recoverable article comprising a polymeric composition according to claim 18.
Claim 35
Dependent Claim
13 words
Electrical equipment incorporating as electrical insulation a polymeric composition according to claim 18.
Claim 36
Dependent Claim
28 words
A composition according to claim 18, in which the hydrated alumina is present in an amount of from 5 to 80% based on the weight of the composition.
Claim 37
Dependent Claim
31 words
A composition according to claim 18, in which the antimony V compound is present in an from amount 0.1 to 60 weight per cent, based on the weight of the composition.
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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) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |