US4798874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic blends comprising polycarbonate resin and amorphous polyamide
Assignee: General Electric Co
•
Filing: 1988-04-11
•
Granted: 1989-01-17
•
Expires: 2008-04-11
Abstract
Abstract Thermoplastic blends of amorphous polyamide with a resin selected from the group consisting of polycarbonate, poly(ester-carbonate), and polyarylate have excellent physical properties.
Inventors
- 👤 Louis M. Maresca
- 👤 Donald C. Clagett
- 👤 Uwe S. Wascher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:13
CPC Classifications
C; C08; C08L; C08L69/00; C08L67/00; C08L67/02; C08L67/03; C08L69/005; C08L77/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
28 words
A blend of thermoplastic resins consisting essentially of: (i) at least one aromatic polycarbonate resin; and (ii) at least one amorphous polyamide resin having no distinct melting point.
Claim 2
Dependent Claim
28 words
A blend of thermoplastic resins consisting essentially of: (i) at least one aromatic polycarbonate resin; and (ii) at least one amorphous polyamide resin having no distinct melting point.
Claim 3
Dependent Claim
23 words
The blend of claim 1 which contains a weight ratio of from about 49/1 to about 1/49 amorphous polyamide to total polycarbonate content.
Claim 4
Dependent Claim
16 words
The blend of claim 2 wherein said ratio is about 9/1 to about 1 to 9.
Claim 5
Dependent Claim
12 words
The blend of claim 1 wherein said amorphous polyamide is substantially transparent.
Claim 6
Dependent Claim
20 words
The blend of claim 1 wherein said amorphous polyamide has a heat of fusion of about 1 cal-gram or less.
Claim 7
Dependent Claim
13 words
The blend of claim 1 wherein said amorphous polyamide has side chain substitution.
Claim 8
Dependent Claim
15 words
The blend of claim 1 wherein aid polyamide is polymerized from monomers comprising non-symmetric monomers.
Claim 9
Dependent Claim
15 words
The blend of claim 7 wherein said non-symmetric monomers comprise meta aromatic diamines and diacids.
Claim 10
Dependent Claim
32 words
The blend of claim 1 wherein said polyamide is a opolymer of at least one nylon selected from the roup consisting of nylon 6, 6/6, 11, 12, 6/3, 6/4, 6/10 and 6/12.
Claim 11
Independent Claim
49 words
A method for preparing a thermoplastic blend consisting essentially of: (i) melt blending thermoplastic resins comprising polyamide and at least one aromatic polycarbonate; and (ii) cooling the resultant resin melt at a sufficient rate effective to produce an amorphous polyamide phaes, the amorphous polyamide having no distinct melting point.
Claim 12
Independent Claim
49 words
A method for preparing a thermoplastic blend consisting essentially of: (i) melt blending thermoplastic resins comprising polyamide and at least one aromatic polycarbonate; and (ii) cooling the resultant resin melt at a sufficient rate effective to produce an amorphous polyamide phaes, the amorphous polyamide having no distinct melting point.
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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) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |