US3856884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
An aromatic polycarbonate/polyalkylene naphthalate resin composition having a marble-like appearance
Assignee: Teijin Ltd
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Filing: 1973-07-31
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Granted: 1974-12-24
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Expires: 1993-07-31
Abstract
Abstract A resin composition having a marble-like appearance is disclosed, comprising 5 to 90% by weight, based on the weight of the composition, of an aromatic polycarbonate, and a polyalkylene naphthalate consisting of polytetramethylene-2,6-naphthalate, polyhexamethylene-2,6-naphthalate and a mixture thereof.
Inventors
- 👤 K Sakai
- 👤 Y Tokai
- 👤 S Matsunaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:53
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L69/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
47 words
A RESIN COMPOSITION HAVING A MARBLE-LIKE APPEARANCE, CONSISTING ESSENTIALLY OF THE SUBSTANTIALLY UNREACTED MIXTURE OF FROM 5 TO 90% BY WEIGHT, BASED ON THE WEIGHT OF THE COMPOSITION, OF AN AROMATIC POLYCARBONATE, AND AT LEAST ONE POLYALKENE NAPTHALATE SELECTED FROM THE GROUP CONSISTING OF POLYTETRAMETHYLENE-2,6-NAPTHALATE AND POLYHEXAMETHYLENE-2,6NAPTHALATE.
Claim 2
Dependent Claim
47 words
A RESIN COMPOSITION HAVING A MARBLE-LIKE APPEARANCE, CONSISTING ESSENTIALLY OF THE SUBSTANTIALLY UNREACTED MIXTURE OF FROM 5 TO 90% BY WEIGHT, BASED ON THE WEIGHT OF THE COMPOSITION, OF AN AROMATIC POLYCARBONATE, AND AT LEAST ONE POLYALKENE NAPTHALATE SELECTED FROM THE GROUP CONSISTING OF POLYTETRAMETHYLENE-2,6-NAPTHALATE AND POLYHEXAMETHYLENE-2,6NAPTHALATE.
Claim 3
Dependent Claim
26 words
The resin composition of claim 1 wherein the amount of said polycarbonate is 5 to 45 % by weight based on the weight of the composition.
Claim 4
Dependent Claim
20 words
The resin composition of claim 1 wherein said aromatic polycarbonate has an average molecular weight of 15,000 to 100, 000.
Claim 5
Dependent Claim
35 words
The resin composition of claim 1 wherein said polyalkylene naphthalate has a relative viscosity, as measured at 35*C. using a solution of 1.2 g of polymer in 100 ml. of ortho-chlorophenol, of at least 1.4.
Claim 6
Dependent Claim
24 words
The resin composition of claim 1 wherein the amount of said polycarbonate is 20 to 40 % based on the weight of the composition.
Claim 7
Dependent Claim
30 words
The resin composition of claim 1 wherein the aromatic polycarbonate and polyalkylene naphthalate are physically mixed while in a molten state, but substantially unreacted, for not more than thirty minutes.
Claim 8
Dependent Claim
19 words
The resin composition of claim 1 wherein the aromatic polycarbonate is an ester-interchange reaction product of a 4,4''-dihydroxydiaryl alkane.
Claim 9
Dependent Claim
59 words
The resin composition of claim 1 wherein the amount of said polycarbonate is 20 to 40 % based on the weight of the composition, the polycarbonate is an ester-interchange reaction product of a 4,4''-dihydroxydiaryl alkane, and the polycarbonate and the polyalkylene naphthalate are physically mixed while in a molten state, but substantially unreacted, for not more than 10 minutes.
References Cited (Backward Citations)
US3218372A
Cited
US3426100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |