US4420584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass-filled polycarbonate of improved impact strength
Assignee: Bayer Corp
•
Filing: 1981-04-29
•
Granted: 1983-12-13
•
Expires: 2001-04-29
Abstract
Abstract A glass fiber reinforced polycarbonate composition having an improved level of impact strength and decreased notch sensitivity, comprising an aromatic polycarbonate, glass fibers and a polyanhydride resin which is a copolymer of alpha -olefin and maleic anhydride is provided.
Inventors
- 👤 Herbert L. Rawlings
- 👤 Gerard E. Reinert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:03
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08K3/00; C08K3/40; C08L; C08L35/00; C08L69/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
86 words
A polycarbonate molding composition comprising (a) an aromatic polycarbonate resin, (b) about 5 to 40% by weight, based on the total composition of glass fibers and (c) about 0.1 to 10% by weight, based on the total composition of a polyanhydride resin characterized by the structural formula: ##STR8## wherein R is a phenyl or an alkyl substituted phenyl radical or an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200 and m is from 1 to 3.
Claim 2
Dependent Claim
86 words
A polycarbonate molding composition comprising (a) an aromatic polycarbonate resin, (b) about 5 to 40% by weight, based on the total composition of glass fibers and (c) about 0.1 to 10% by weight, based on the total composition of a polyanhydride resin characterized by the structural formula: ##STR8## wherein R is a phenyl or an alkyl substituted phenyl radical or an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200 and m is from 1 to 3.
Claim 3
Dependent Claim
86 words
A polycarbonate molding composition comprising (a) an aromatic polycarbonate resin, (b) about 5 to 40% by weight, based on the total composition of glass fibers and (c) about 0.8 to 3.75% by weight, based on the total composition of a polyanhydride resin characterized by the structural formula: ##STR9## wherein R is a phenyl or an alkyl substituted phenyl radical or an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200 and m is from 1 to 3.
Claim 4
Dependent Claim
86 words
A polycarbonate molding composition comprising (a) an aromatic polycarbonate resin, (b) about 5 to 40% by weight, based on the total composition of glass fibers and (c) about 0.8 to 3.75% by weight, based on the total composition of a polyanhydride resin characterized by the structural formula: ##STR9## wherein R is a phenyl or an alkyl substituted phenyl radical or an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200 and m is from 1 to 3.
Claim 5
Dependent Claim
29 words
The molding composition of claim 1 wherein said polyanhydride resin is present in an amount of between 0.5 and 5% by weight, relative to the weight of said composition.
Claim 6
Dependent Claim
30 words
The molding composition of claim 1 or 2 wherein said glass fibers are present in an amount of between 10 and 30% by weight relative to weight of said composition.
Claim 7
Dependent Claim
26 words
The molding composition of claim 1 or 2 wherein said polyanhydride is a copolymer of α-octadecene and maleic acid anhydride having a molar ratio of 1:1.
Claim 8
Dependent Claim
15 words
The molding composition of claim 1 or 2 wherein said polycarbonate is based on bisphenol-A.
Claim 9
Dependent Claim
13 words
The molding composition of claim 1 or 2 further comprising flame retarding agents.
Claim 10
Dependent Claim
83 words
A process for desensitizing the notch effects of glass fiber reinforced aromatic polycarbonate compositions containing 5 to 40 percent by weight glass fibers comprising blending therein about 0.1 to 10% by weight, relative to the weight of the composition of a polyanhydride characterized by the structural formula: ##STR10## wherein R is a phenyl radical or an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200, and m is an integer from 1 to 3.
Claim 11
Dependent Claim
83 words
A process for desensitizing the notch effects of glass fiber reinforced aromatic polycarbonate compositions containing 5 to 40 percent by weight glass fibers comprising blending therein about 0.1 to 10% by weight, relative to the weight of the composition of a polyanhydride characterized by the structural formula: ##STR10## wherein R is a phenyl radical or an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200, and m is an integer from 1 to 3.
Claim 12
Dependent Claim
103 words
A polycarbonate molding composition comprising (a) an aromatic polycarbonate resin, (b) about 5 to 40% by weight, based on the total composition of glass fibers, (c) about 0.1 to 10% by weight, based on the total composition of a polyanhydride resin characterized by the structural formula: ##STR11## wherein R is a phenyl or an alkyl substituted phenyl radical or an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200 and m is from 1 to 3, (d) a sufficient amount of flame-retarding agents to render this composition V-O rating at 1/16" according to UL-94.
Claim 13
Dependent Claim
103 words
A polycarbonate molding composition comprising (a) an aromatic polycarbonate resin, (b) about 5 to 40% by weight, based on the total composition of glass fibers, (c) about 0.1 to 10% by weight, based on the total composition of a polyanhydride resin characterized by the structural formula: ##STR11## wherein R is a phenyl or an alkyl substituted phenyl radical or an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200 and m is from 1 to 3, (d) a sufficient amount of flame-retarding agents to render this composition V-O rating at 1/16" according to UL-94.
Claim 14
Dependent Claim
77 words
A polycarbonate molding composition comprising (a) an aromatic polycarbonate resin, (b) about 5 to 40% by weight, based on the total composition of glass fibers and (c) about 0.1 to 10% by weight, based on the total composition of a polyanhydride resin characterized by the structural formula: ##STR12## wherein R is an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200 and m is from 1 to 3.
Claim 15
Dependent Claim
77 words
A polycarbonate molding composition comprising (a) an aromatic polycarbonate resin, (b) about 5 to 40% by weight, based on the total composition of glass fibers and (c) about 0.1 to 10% by weight, based on the total composition of a polyanhydride resin characterized by the structural formula: ##STR12## wherein R is an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200 and m is from 1 to 3.
Claim 16
Dependent Claim
27 words
The composition of claim 10 wherein said glass fibers are present in an amount of between 10 to 30% by weight relative to weight of said composition.
Claim 17
Dependent Claim
28 words
The composition of claim 10 wherein said polyanhydride resin is present in an amount of between 0.5 and 5% by weight, relative to the weight of said composition.
Claim 18
Dependent Claim
27 words
The composition of claim 10 or 11 or 12 wherein said polyanhydride is a copolymer of α-octadecene and maleic acid anhydride having a molar ratio of 1:1.
Claim 19
Dependent Claim
94 words
A polycarbonate molding composition comprising (a) an aromatic polycarbonate resin, (b) about 5 to 40% by weight, based on the total composition of glass fibers, (c) about 0.1 to 10% by weight, based on the total composition of a polyanhydride resin characterized by the structural formula: ##STR13## wherein R is an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200 and m is from 1 to 3, (d) a sufficient amount of flame-retarding agent to render this composition V-O rating at 1/16" according to UL-94.
Claim 20
Dependent Claim
94 words
A polycarbonate molding composition comprising (a) an aromatic polycarbonate resin, (b) about 5 to 40% by weight, based on the total composition of glass fibers, (c) about 0.1 to 10% by weight, based on the total composition of a polyanhydride resin characterized by the structural formula: ##STR13## wherein R is an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200 and m is from 1 to 3, (d) a sufficient amount of flame-retarding agent to render this composition V-O rating at 1/16" according to UL-94.
Claim 21
Dependent Claim
83 words
A process for desensitizing the notch effects of glass fibers reinforced aromatic polycarbonate compositions containing 5 to 40 percent by weight glass fibers comprising blending therein about 0.8 to 3.75% by weight, relative to the weight of the composition of a polyanhydride characterized by the structural formula: ##STR14## wherein R is a phenyl radical or an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200, and m is an integer from 1 to 3.
Claim 22
Dependent Claim
83 words
A process for desensitizing the notch effects of glass fibers reinforced aromatic polycarbonate compositions containing 5 to 40 percent by weight glass fibers comprising blending therein about 0.8 to 3.75% by weight, relative to the weight of the composition of a polyanhydride characterized by the structural formula: ##STR14## wherein R is a phenyl radical or an alkyl radical having from 4 to 16 carbon atoms, n is an integer of from 1 to 200, and m is an integer from 1 to 3.
References Cited (Backward Citations)
US3586659A
Cited
US3732337A
Cited
US3678079A
Cited
US3862998A
Cited
US4172103A
Cited
US4080349A
Cited
US4048133A
Cited
US4056504A
Cited
US4147707A
Cited
US4172859A
Cited
US4143094A
Cited
US4205141A
Cited
US4097435A
Cited
US4247662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |