US5039741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toughened polyoxymethylene and shaped articles produced therefrom
Assignee: Ticona GmbH
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Filing: 1990-03-02
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Granted: 1991-08-13
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Expires: 2010-03-02
Abstract
Abstract The invention relates to a mixture composed essentially of polyoxymethylene (component A), a rubber-elastic graft copolymer in which the particles have been formed from a rubber-elastic, single-phase core based on polydiene and a hard graft shell (component B) and, if appropriate, a polymeric third component (component C). The invention also relates to a three-component mixture of the components A, B' and C, the core, in the case of B', being preponderantly or entirely composed of poly(meth)acrylic acid ester or silicone rubber instead of polydiene. The shaped articles produced from these mixtures are particularly distinguished by good low-temperature impact strength.
Inventors
- 👤 Karlheinz Burg
- 👤 Harald Cherdron
- 👤 Friedrich Kloos
- 👤 Helmut Schlaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:05
CPC Classifications
C; C08; C08L; C08L59/00; C08L59/02; C08F; C08F279/00; C08F279/02; C08L51/00; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
A mixture comprised of polyoxymethylene (component A) and 5-50% by weight, relative to the total mixture, of a rubber-elastic graft copolymer (component B), wherein the graft copolymer is present in the polyoxymethylene in the form of a finely dispersed phase having an average particle size between 0.1 and 5 μm and consists essentially of particles which have been formed from a rubber-elastic, single-phase core consisting essentially of a polydiene base, which is cross-linked and has a gel content in excess of 70%, and a hard graft shell, said shell comprising a single layer or a plurality of layers.
Claim 2
Dependent Claim
98 words
A mixture comprised of polyoxymethylene (component A) and 5-50% by weight, relative to the total mixture, of a rubber-elastic graft copolymer (component B), wherein the graft copolymer is present in the polyoxymethylene in the form of a finely dispersed phase having an average particle size between 0.1 and 5 μm and consists essentially of particles which have been formed from a rubber-elastic, single-phase core consisting essentially of a polydiene base, which is cross-linked and has a gel content in excess of 70%, and a hard graft shell, said shell comprising a single layer or a plurality of layers.
Claim 3
Dependent Claim
17 words
A mixture as claimed in claim 1, wherein the core in the component B consists of polydiene.
Claim 4
Dependent Claim
36 words
A mixture as claimed in claim 1, wherein the shell of the particles in the component B consists essentially of a single layer, said single layer consisting essentially of polyacrylate, polymethacrylate, polyacrylonitrile, polymethacrylonitrile, or combinations thereof.
Claim 5
Dependent Claim
19 words
A mixture as claimed in claim 1, wherein the component B has a glass transition temperature below -60° C.
Claim 6
Dependent Claim
12 words
A shaped article produced from the mixture as claimed in claim 1.
Claim 7
Dependent Claim
16 words
A mixture as claimed in claim 1, wherein said shell consists essentially of a single layer.
Claim 8
Dependent Claim
15 words
A mixture as claimed in claim 1 consisting essentially of component A and component B.
Claim 9
Dependent Claim
15 words
A mixture as claimed in claim 1, wherein said shell comprises a plurality of layers.
Claim 10
Dependent Claim
35 words
A mixture as claimed in claim 8, wherein said shell consists essentially of two layers, an inner layer consisting essentially of crosslinked polystyrene and an outer layer consisting essentially of polyacrylate, polymethacrylate, polyacrylonitrile, or polymethacrylonitrile.
Claim 11
Dependent Claim
95 words
A mixture comprising: component A, a polyoxymethylene, having incorporated therein 5-50% by weight, relative to the total mixture, of component B, a particulate mass finely distributed throughout component A, the particles of said particulate mass having an average particle size between 0.1 and 5 μm and consisting essentially of rubber-elastic, single phase cores having a polydiene base, which is cross-linked and has a gel content in excess of 70%, and a hard graft shell, said hard graft shell being essentially of the polydiene and up to 10% by weight of a co-polymerized styrene or acrylonitrile.
Claim 12
Dependent Claim
95 words
A mixture comprising: component A, a polyoxymethylene, having incorporated therein 5-50% by weight, relative to the total mixture, of component B, a particulate mass finely distributed throughout component A, the particles of said particulate mass having an average particle size between 0.1 and 5 μm and consisting essentially of rubber-elastic, single phase cores having a polydiene base, which is cross-linked and has a gel content in excess of 70%, and a hard graft shell, said hard graft shell being essentially of the polydiene and up to 10% by weight of a co-polymerized styrene or acrylonitrile.
Claim 13
Dependent Claim
20 words
A mixture as claimed in claim 10, wherein the the copolymerized styrene or acrylonitrile is up to 5% by weight.
References Cited (Backward Citations)
DE1193240B
Cited
DE1931392A1
Cited
US3642940A
Cited
DE1964156A1
Cited
US3749755A
Cited
DE2659357A1
Cited
US4296216A
Cited
EP0037686A2
Cited
EP0079477A1
Cited
US4556690A
Cited
US4639488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |