US4384067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral-filled polycarbonate compositions of improved impact strength
Assignee: Bayer Corp
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Filing: 1981-11-19
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Granted: 1983-05-17
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Expires: 2001-11-19
Abstract
Abstract A mineral-filled thermoplastic composition comprising polycarbonate, poly(alkylene) terephthalate and polyanhydride resin characterized in an improved impact is disclosed.
Inventors
- 👤 Herbert L. Rawlings
- 👤 Gerard E. Reinert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:06
CPC Classifications
C; C08; C08L; C08L69/00; C08K; C08K3/00; C08K3/01; C08K3/013; C08K3/18; C08K3/24; C08K3/26; C08K3/34; C08L23/00; C08L23/02; C08L23/18; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
147 words
A filled molding composition comprising: (a) an aromatic polycarbonate resin and (b) poly(alkylene) terephthalate wherein alkylene groups contain from 2 to 10 carbon atoms and (c) a polyanhydride resin characterized by the structural formula ##STR6## wherein R is selected from the group consisting of a phenyl radical, an alkyl substituted phenyl radical and an alkyl radical having more than 4 carbon atoms, m is an integer of from 1 to 3, R 1 and R 2 independently are a hydrogen atom or a C 1 -C 6 alkyl and n is an integer of from 1 to 200 and (d) a mineral filler having a maximum particle size under 100 microns wherein said polyanhydride resin is present at an amount between 0.5 and 5% relative to the weight of the composition, and wherein said aromatic polycarbonate and said poly(alkylene) terephthalate relate by weight from 10:1 to 1:2.
Claim 2
Dependent Claim
147 words
A filled molding composition comprising: (a) an aromatic polycarbonate resin and (b) poly(alkylene) terephthalate wherein alkylene groups contain from 2 to 10 carbon atoms and (c) a polyanhydride resin characterized by the structural formula ##STR6## wherein R is selected from the group consisting of a phenyl radical, an alkyl substituted phenyl radical and an alkyl radical having more than 4 carbon atoms, m is an integer of from 1 to 3, R 1 and R 2 independently are a hydrogen atom or a C 1 -C 6 alkyl and n is an integer of from 1 to 200 and (d) a mineral filler having a maximum particle size under 100 microns wherein said polyanhydride resin is present at an amount between 0.5 and 5% relative to the weight of the composition, and wherein said aromatic polycarbonate and said poly(alkylene) terephthalate relate by weight from 10:1 to 1:2.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein said alkylene groups contain 2 carbon atoms.
Claim 4
Dependent Claim
24 words
The composition of claim 1 wherein said polyanhydride resin is a copolymer of α-octadecene and maleic and anhydride having a molar ratio of 1:1.
Claim 5
Dependent Claim
11 words
The composition of claim 3 wherein said mineral filler is novaculite.
Claim 6
Dependent Claim
19 words
The composition of claim 4 wherein said novaculite is of an average particle size of less than 5 microns.
Claim 7
Dependent Claim
21 words
The composition of claim 1 wherein said mineral filler is present in an amount between 10 and 40 percent by weight.
Claim 8
Dependent Claim
59 words
The composition of claim 1 or 2 or 3 wherein said mineral filler is present at an amount between 10 and 40 percent, said polyanhydride is present at an amount between 0.5 and 5 percent said percents relative to the weight of said composition, and said polycarbonate relates by weight to said poly(alkylene) terephthalate as from 10:1 to 1:2.
Claim 9
Dependent Claim
22 words
The composition of claim 1 or 2 or 3 or 4 or 6 wherein R 1 and R 2 are hydrogen atoms.
References Cited (Backward Citations)
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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) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |