US5185404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow improvement in the processing of PVC blends to be modified for impact strength
Assignee: Roehm GmbH Darmstadt
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Filing: 1991-07-31
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Granted: 1993-02-09
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Expires: 2011-07-31
Abstract
Abstract This invention relates to the flow improvement of compositions containing PVC to be modified for impact resistance, such as PVC-ABS polymer blends, during their processing, for example during injection molding, in processing machines by polymers based on alkyl methacrylate that are made up of at least 50 wt. % methyl methacrylate and with 2 to 50 wt. % C 2-8 -alkyl methacrylates as monomers, with molecular weights Mw in the range of 2,000 to ≦20,000 g/mol.
Inventors
- 👤 Karl J. Folsch
- 👤 Klaus Frank
- 👤 Karl-August Jung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:22
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L55/00; C08L55/02; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
44 words
A process for the mechanical processing of incompatible polymer blends containing PVC into plastic blend articles, comprising adding alkyl methacrylate copolymers with molecular weights Mw in the range of 2,000 to ≦10,000 g/mol to an incompatible polymer blend and mechanically processing said polymer blend.
Claim 2
Dependent Claim
44 words
A process for the mechanical processing of incompatible polymer blends containing PVC into plastic blend articles, comprising adding alkyl methacrylate copolymers with molecular weights Mw in the range of 2,000 to ≦10,000 g/mol to an incompatible polymer blend and mechanically processing said polymer blend.
Claim 3
Dependent Claim
30 words
The process of claim 1, wherein the polymer blend is PVC-ABS blend that contains PVC and ABS in a ratio of 70 : 30 to 30 : 70 by weight.
Claim 4
Dependent Claim
31 words
The process of claims 1 and 2, wherein the alkyl methacrylate copolymers comprise 50 to 100 wt.% alkyl methacrylates with 1 to 8 carbon atoms in the alkyl group as monomers.
Claim 5
Dependent Claim
21 words
The process of claims 1 or 2 wherein the alkyl methacrylate copolymers comprise 50 to 98 wt.% methyl methacrylate as monomer.
Claim 6
Dependent Claim
28 words
The process of claims 1 or 2, wherein the alkyl methacrylate copolymers comprise 60 to 95 wt.% methyl methacrylate and 40 to 5 wt.% n-butyl methacrylate as monomers.
Claim 7
Dependent Claim
54 words
The process of claims 1 or 2, wherein the alkyl methacrylate copolymers comprise at least 50 wt.% methyl methacrylate, 2 to 50 wt.% alkyl methacrylates with 2 to 8 carbon atoms in the alkyl group and 0 to 48 wt.% alkyl acrylates with 1 to 8 carbon atoms in the alkyl group as monomers.
Claim 8
Dependent Claim
17 words
The process of claim 6, wherein the alkyl methacrylate copolymers additionally comprise 0-48 wt.% of other monomer.
Claim 9
Dependent Claim
31 words
The process of claim 1, wherein the alkyl methacrylate copolymers are added in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of polymer blend.
Claim 10
Dependent Claim
31 words
The process of claim 8, wherein the alkyl methacrylate copolymers are added in an amount of 0.5 to 8 parts by weight based on 100 parts by weight of polymer blend.
Claim 11
Dependent Claim
31 words
The process of claim 8, wherein the alkyl methacrylate copolymers are added in an amount of 1 to 5 parts by weight based on 100 parts by weight of polymer blend.
Claim 12
Dependent Claim
19 words
The process of claim 5, wherein said alkyl methacrylate copolymers comprise 80-90% methyl methacrylate and 10-20% n-butyl-methacrylate as monomer.
Claim 13
Dependent Claim
21 words
The process of claim 5, wherein said alkyl methacrylate copolymers have molecular weights Mw in the range of 5,000 to 7,000.
Claim 14
Dependent Claim
15 words
The process of claim 1, wherein said polymer blend is mechanically processed by injection molding.
Claim 15
Dependent Claim
23 words
The process of claim 6, wherein said other monomer is selected from the group consisting of styrene and acrylonitrile or a mixture thereof.
References Cited (Backward Citations)
US3983186A
Cited
FR2167677A1
Cited
US4413092A
Cited
US4440905A
Cited
EP0058979A1
Cited
EP0138121A1
Cited
DE3542469A1
Cited
JPH06121152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-02-09 | 1996-08-10 | 1997-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-09 | 2000-08-10 | 2001-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-09 | 2004-08-10 | 2005-02-09 | $7700.00 | Window Closed / Lapsed |