US4517319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toughened polyoxymethylene and shaped articles produced therefrom
Assignee: Ticona GmbH
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Filing: 1984-02-02
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Granted: 1985-05-14
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Expires: 2004-02-02
Abstract
Abstract The invention relates to mixtures essentially composed of a polyoxymethylene, a polyurethane and a filler, the polyurethane having a Shore hardness A of not more than 90 and the filler having an average particle size less than 10 μm. The shaped articles produced from the mixture according to the invention are distinguished, above all, by improved notched impact strength.
Inventors
- 👤 Eckart Reske
- 👤 Ernst Wolters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:02
CPC Classifications
C; C08; C08L; C08L59/00; C08L59/02; C08K; C08K3/00; C08K3/01; C08K3/013; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A mixture consisting essentially of a polyoxymethylene, a polyurethane and a filler, wherein the polyurethane has a Shore hardness A of not more than 90 and the filler has an average particle size less than 10 μm, and wherein the composition of the mixture is given by the equations ##EQU2## in which the symbols have the following meaning: P 1 =% by weight of polyoxymethylene P 2 =% by weight of polyurethane P 3 =% by weight of filler ρ 1 =density of the polyoxymetnylene in g.cm -3 ρ 2 =density of the polyurethane in g.cm -3 ρ.sub. = density of the filler material in g.cm -3 a=a numerical value between 0 and 0.4, b=a numerical value between 0.03 and 0.55, and P 3 is at least 0.5.
Claim 2
Dependent Claim
128 words
A mixture consisting essentially of a polyoxymethylene, a polyurethane and a filler, wherein the polyurethane has a Shore hardness A of not more than 90 and the filler has an average particle size less than 10 μm, and wherein the composition of the mixture is given by the equations ##EQU2## in which the symbols have the following meaning: P 1 =% by weight of polyoxymethylene P 2 =% by weight of polyurethane P 3 =% by weight of filler ρ 1 =density of the polyoxymetnylene in g.cm -3 ρ 2 =density of the polyurethane in g.cm -3 ρ.sub. = density of the filler material in g.cm -3 a=a numerical value between 0 and 0.4, b=a numerical value between 0.03 and 0.55, and P 3 is at least 0.5.
Claim 3
Dependent Claim
33 words
A mixture as claimed in claim 1, wherein a has a numerical value between 0 and 0.3, b has a numerical value between 0.03 and 0.55, and P 3 is at least 1.
Claim 4
Dependent Claim
14 words
A mixture as claimed in claim 1, wherein a is not more than 0.25.
Claim 5
Dependent Claim
37 words
A mixture as claimed in claim 1, wherein the filler has an average particle size less than 5 μm, and contains not more than 3% by weight of particles having a particle size greater than 10 μm.
Claim 6
Dependent Claim
20 words
A mixture as claimed in claim 1, wherein the filler neither melts nor sinters together nor decomposes below 250° C.
Claim 7
Dependent Claim
20 words
A mixture as claimed in claim 5, wherein the filler neither melts nor sinters together nor decomposes below 230° C.
Claim 8
Dependent Claim
20 words
A mixture as claimed in claim 1, wherein the filler is carbon black or an oxide, sulfate, carbonate or silicate.
Claim 9
Dependent Claim
32 words
A mixture as claimed in claim 7, wherein the filler is titanium dioxide, zinc oxide, aluminum oxide, silicon dioxide which has been surface-treated with dimethyldichlorosilane, magnesium carbonate, calcium carbonate or zinc carbonate.
Claim 10
Dependent Claim
22 words
A mixture as claimed in claim 1, wherein the polyurethane is thermoplastic and has a Shore hardness A of 50 to 85.
Claim 11
Dependent Claim
12 words
A shaped article produced from the mixture as claimed in claim 1.
References Cited (Backward Citations)
US3256245A
Cited
DE1193240B
Cited
DE2051028A1
Cited
US3766298A
Cited
US3781381A
Cited
US4179479A
Cited
US4388865A
Cited
EP0038881A1
Cited
US4347338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |