US4804711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt blending of a carboxy terminated polystyrene oligomer with an aromatic polyester
Assignee: General Electric Co
•
Filing: 1987-10-26
•
Granted: 1989-02-14
•
Expires: 2007-10-26
Abstract
Abstract A process which comprises mixing a melt of an amorphous aromatic polyester with a melt of a carboxy terminated polystyrene oligomer, said oligomer having a number average molecular weight of from about 500 to 10,000.
Inventors
- 👤 Toshio Ishihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:32
CPC Classifications
C; C08; C08L; C08L69/00; C08L69/005; C08L67/00; C08L67/02; C08L67/03
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
39 words
A composition prepared from a process which comprises mixing a melt of an amorphous aromatic polyester with a melt of a carboxy terminated polystyrene oligomer, said oligomer having a number average molecular weight of from about 500 to 10,000.
Claim 2
Dependent Claim
39 words
A composition prepared from a process which comprises mixing a melt of an amorphous aromatic polyester with a melt of a carboxy terminated polystyrene oligomer, said oligomer having a number average molecular weight of from about 500 to 10,000.
Claim 3
Dependent Claim
17 words
The composition in accordance with claim 1 wherein the polyester is polycarbonate, copolyestercarbonate, polyarylate, or polycycloalkylene phthalate.
Claim 4
Dependent Claim
13 words
The composition in accordance with claim 2 wherein the polyester is aromatic polycarbonate.
Claim 5
Dependent Claim
13 words
The composition in accordance with claim 3 wherein the polycarbonate is bisphenol-A polycarbonate.
Claim 6
Dependent Claim
18 words
The composition in accordance with claim 1 wherein the monomer comprising the oligomer is styrene, methylstyrene or p-methylstyrene.
Claim 7
Dependent Claim
20 words
The composition in accordance with claim 5 wherein the polystyrene has a further comonomer which is not a vinyl aromatic.
Claim 8
Dependent Claim
18 words
The composition in accordance with claim 6 wherein the said comonomer is acrylonitrile, acrylate, methacrylate or an alkadiene.
Claim 9
Dependent Claim
22 words
The composition in accordance with claim 7 wherein the styrene monomer is from about 20 to 90 mole percent of the oligomer.
Claim 10
Dependent Claim
21 words
The composition in accordance with claim 8 wherein the styrene monomer is at least about 50 mole percent of the oligomer.
Claim 11
Dependent Claim
26 words
The composition in accordance with claim 9 wherein the oligomer is 25 mole percent acrylonitrile and 75 mole percent styrene and the polyester is bisphenol-A polycarbonate.
Claim 12
Dependent Claim
19 words
The composition in accordance with claim 5 wherein the oligomer monomer is styrene and the polyester is bisphenol-A polycarbonate.
Claim 13
Dependent Claim
29 words
A composition comprising an admixture of an amorphous polyester and a carboxy terminated polystyrene oligomer, said oligomer having a number average molecular weight of from about 500 to 10,000.
Claim 14
Dependent Claim
29 words
A composition comprising an admixture of an amorphous polyester and a carboxy terminated polystyrene oligomer, said oligomer having a number average molecular weight of from about 500 to 10,000.
Claim 15
Dependent Claim
17 words
The composition in accordance with claim 12 wherein the polyester is polycarbonate, copolyestercarbonate, polyarylate, or polycycloalkylene phthalate.
Claim 16
Dependent Claim
13 words
The composition in accordance with claim 13 wherein the polyester is aromatic polycarbonate.
Claim 17
Dependent Claim
13 words
The composition in accordancd with claim 14 wherein the polycarbonate is bisphenol-A polycarbonate.
Claim 18
Dependent Claim
19 words
The composition in accordance with claim 12 wherein the monomer comprising the oligomer is styrene, α methylstyrene or p-methylstyrene.
Claim 19
Dependent Claim
20 words
The composition in accordance with claim 16 wherein the polystyrene has a further comonomer which is not a vinyl aromatic.
Claim 20
Dependent Claim
17 words
The composition in accordance with claim 17 wherein the monomer is acrylonitrile, acrylate, methacrylate or an alkadiene.
Claim 21
Dependent Claim
22 words
The composition in accordance with claim 18 wherein the styrene monomer is from about 20 to 90 mole percent of the oligomer.
Claim 22
Dependent Claim
21 words
The composition in accordance with claim 19 wherein the styrene monomer is at least about 50 mole percent of the oligomer.
Claim 23
Dependent Claim
26 words
The composition in accordance with claim 20 wherein the oligomer is 25 mole percent acrylonitrile and 75 mole percent styrene and the polyester is bisphenol-A polycarbonate.
Claim 24
Dependent Claim
19 words
The composition in accordance with claim 15 wherein the oligomer monomer is styrene and the polyester is bisphenol-A polycarbonate.
Claim 25
Dependent Claim
17 words
The composition in accordance with claim 12 wherein the polystyrene oligomer is terminated with mercapto succinic acid.
Claim 26
Dependent Claim
28 words
The composition in accordance with claim 1 wherein the oligomer is from about 0.5 to about 2 weight percent of the weight of the polyester and the oligomer.
Claim 27
Dependent Claim
27 words
The composition in accordance with claim 11 wherein the styrene oligomer is from about 0.5 to about 2 wt. percent of the styrene oligomer and bisphenol-A polycarbonate.
Claim 28
Dependent Claim
28 words
The composition in accordance with claim 1 wherein the oligomer is from about 0.5 to about 10 wt. percent of the weight of the polyester and the oligomer.
Claim 29
Dependent Claim
24 words
The composition in accordance with claim 12 wherein the oligomer is from about 0.5 to about 10 wt. percent of the polyester and oligomer.
Claim 30
Dependent Claim
24 words
The composition in accordance with claim 27 wherein the oligomer is from about 0.5 to about 2 wt. percent of the oligomer and polyester.
Claim 31
Dependent Claim
28 words
The composition in accordance with claim 22 wherein the styrene oligomer is from about 0.5 to about 2 wt. percent of the styrene oligomer and the bisphenol-A polycarbonate.
References Cited (Backward Citations)
US4267096A
Cited
US4657980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-02-14 | 1992-08-15 | 1993-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-14 | 1996-08-15 | 1997-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-14 | 2000-08-15 | 2001-02-14 | $7700.00 | Window Closed / Lapsed |