US4056504A
Expired / Lapsed
US
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Polycarbonate molding compositions
Assignee: Bayer AG
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Filing: 1976-01-07
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Granted: 1977-11-01
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Expires: 1996-01-07
Abstract
Abstract The present invention is concerned with polycarbonate molding resins with improved flow and strength properties which contain about 10 to 40 wt.% glass fibers and about 0.5 to 5 wt. % of polyalkylene glycol terephthalate or about 0.5 to 10 wt.% of polyalkylene glycol isophthalate.
Inventors
- 👤 Manfred Grundmeier
- 👤 Rudolf Binsack
- 👤 Hugo Vernaleken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:47
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08L; C08L69/00
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
97 words
Thermoplastic molding compositions comprising a. high molecular aromatic polycarbonates based on diphenols, b. about 10% by weight to 40% by weight based on the polycarbonate + glass fibers, of glass fibers, and c. about 4% by weight to 0.5% by weight, based on the total mixture, of a polyalkylene glycol terephthalate, or a. high molecular aromatic polycarbonates based on diphenols b. about 10% by weight to 40% by weight, based on the total mixture, of glass fibers and c. about 10% by weight to 0.5% by weight, based on the total mixture of a polyalkylene glycol isophthalate.
Claim 2
Dependent Claim
97 words
Thermoplastic molding compositions comprising a. high molecular aromatic polycarbonates based on diphenols, b. about 10% by weight to 40% by weight based on the polycarbonate + glass fibers, of glass fibers, and c. about 4% by weight to 0.5% by weight, based on the total mixture, of a polyalkylene glycol terephthalate, or a. high molecular aromatic polycarbonates based on diphenols b. about 10% by weight to 40% by weight, based on the total mixture, of glass fibers and c. about 10% by weight to 0.5% by weight, based on the total mixture of a polyalkylene glycol isophthalate.
Claim 3
Dependent Claim
49 words
Thermoplastic molding compositions comprising a. high-molecular aromatic polycarbonates based on diphenols b. about 10% by weight to 40% by weight, based on the polycarbonate + glass fibers, of glass fibers c. about 4% by weight to 1% by weight, based on the total mixture, of a polyalkylene glycol terephthalate.
Claim 4
Dependent Claim
49 words
Thermoplastic molding compositions comprising a. high-molecular aromatic polycarbonates based on diphenols b. about 10% by weight to 40% by weight, based on the polycarbonate + glass fibers, of glass fibers c. about 4% by weight to 1% by weight, based on the total mixture, of a polyalkylene glycol terephthalate.
Claim 5
Dependent Claim
19 words
Thermoplastic molding compositions according to claim 2, characterized in that polyethylene terephthalate is used as the polyalkylene glycol terephthalate.
Claim 6
Dependent Claim
17 words
The molding composition of claim 2 characterized in that polybutylene terephthalate is used as polyalkylene glycol terephthalate.
Claim 7
Dependent Claim
48 words
Thermoplastic molding compositions comprising a. high-molecular aromatic polycarbonates based on diphenols b. about 10% by weight to 40% by weight, based on the total mixture, of glass fibers and c. about 10% by weight to 0.5% by weight, based on the total mixture, of a polyalkylene glycol isophthalate.
Claim 8
Dependent Claim
48 words
Thermoplastic molding compositions comprising a. high-molecular aromatic polycarbonates based on diphenols b. about 10% by weight to 40% by weight, based on the total mixture, of glass fibers and c. about 10% by weight to 0.5% by weight, based on the total mixture, of a polyalkylene glycol isophthalate.
Claim 9
Dependent Claim
32 words
Thermoplastic molding compositions of claim 5, characterized in that a polyalkylene glycol isophthalate is used in which up to 75 mol-% of the isophthalic acid has been substituted by other dicarboxylic acids.
Claim 10
Dependent Claim
18 words
Thermoplastic molding compositions of claim 5, charaterized in that polyethylene glycol isophthalate is used as polyalkylene glycol isophthalate.
Claim 11
Dependent Claim
18 words
Thermoplastic molding compositions of claim 5, characterized in that poly-1,4-bis hydroxymethyl-cyclohexane isophthalate is used as polyalkylene glycol isophthalate.
Claim 12
Dependent Claim
57 words
A process for improving the melt viscosity of high molecular weight aromatic polycarbonate molding resins containing about 10 to 40 wt.% glass fibers, based on the weight of the polycarbonate and glass fibers, comprising incorporating about 0.5 to 4 wt.%, based on the weight of the total mixture, of a polyalkylene glycol terephthalate into the molding resin.
Claim 13
Dependent Claim
57 words
A process for improving the melt viscosity of high molecular weight aromatic polycarbonate molding resins containing about 10 to 40 wt.% glass fibers, based on the weight of the polycarbonate and glass fibers, comprising incorporating about 0.5 to 4 wt.%, based on the weight of the total mixture, of a polyalkylene glycol terephthalate into the molding resin.
Claim 14
Dependent Claim
13 words
The process of claim 9 wherein the polyalkylene glycol terephthalate is polyethylene terephthalate.
Claim 15
Dependent Claim
13 words
The process of claim 9 wherein the polyalkylene glycol terephthalate is polybutylene terephthalate.
Claim 16
Dependent Claim
31 words
The process of claim 9 wherein the polyalkylene glycol terephthalate is incorporated at temperatures between about 250° and 300° C with a mixing time of not more than about 5 minutes.
Claim 17
Dependent Claim
17 words
The process of claim 12 wherein the temperature of incorporation is between about 270° and 290° C.
Claim 18
Dependent Claim
25 words
The process of claim 9 wherein the incorporation conditions are such that substantially no transesterification takes place between the polycarbonate and the polyalkylene glycol terephthalate.
Claim 19
Dependent Claim
13 words
The process of claim 9 wherein the components are processed in an extruder.
Claim 20
Dependent Claim
20 words
The process of claim 15 wherein the polyalkylene glycol terephthalate is incorporated into a polycarbonate which already contains glass fibers.
Claim 21
Dependent Claim
18 words
The process of claim 9 wherein the components are mixed in an internal kneader and then ribbon granulated.
Claim 22
Dependent Claim
57 words
A process for improving the melt viscosity of high molecular weight aromatic polycarbonate molding resins containing about 10 to 40 wt.% glass fibers, based on the weight of the polycarbonate and glass fibers, comprising incorporating about 0.5 to 10 wt.%, based on the weight of the total mixture, of a polyalkylene glycol isophthalate into the molding resin.
Claim 23
Dependent Claim
57 words
A process for improving the melt viscosity of high molecular weight aromatic polycarbonate molding resins containing about 10 to 40 wt.% glass fibers, based on the weight of the polycarbonate and glass fibers, comprising incorporating about 0.5 to 10 wt.%, based on the weight of the total mixture, of a polyalkylene glycol isophthalate into the molding resin.
Claim 24
Dependent Claim
29 words
The process of claim 18 wherein a polyalkylene glycol isophthalate is used in which up to 75 mol% of the isophthalic acid has been substituted by other dicarboxylic acids.
Claim 25
Dependent Claim
14 words
The process of claim 18 wherein the polyalkylene glycol isophthalate is polyethylene glycol isophthalate.
Claim 26
Dependent Claim
13 words
The process of claim 18 wherein the polyalkylene glycol isophthalate is poly-1,4-bis-hydroxymethyl-cyclohexane isophthalate.
Claim 27
Dependent Claim
31 words
The process of claim 18 wherein the polyalkylene glycol isophthalate is incorporated at temperatures between about 250° and 300° C with a mixing time of not more than about 5 minutes.
Claim 28
Dependent Claim
17 words
The process of claim 22 wherein the temperature of incorporation is between about 270° and 290° C.
Claim 29
Dependent Claim
25 words
The process of claim 18 wherein the incorporation conditions are such that substantially no transesterification takes place between the polycarbonate and the polyalkylene glycol isophthalate.
Claim 30
Dependent Claim
13 words
The process of claim 18 wherein the components are processed in an extruder.
Claim 31
Dependent Claim
20 words
The process of claim 25 wherein the polyalkylene glycol isophthalate is incorporated into a polycarbonate which already contains glass fibers.
Claim 32
Dependent Claim
18 words
The process of claim 18 wherein the components are mixed in an internal kneader and then ribbon granulated.
Claim 33
Dependent Claim
29 words
The thermoplastic molding compositions of claim 5 wherein the polyalkylene glycol isophthalate is present in from about 7% by weight to 1% by weight, based on the total mixture.
Claim 34
Dependent Claim
31 words
The process of claim 18 wherein about 1 to 7 wt. %, based on the weight of the total mixture, of a polyalkylene glycol isophthalate is incorporated into the molding resin.
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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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |