US4698390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miscible blends of polycarbonate with vinyl chloride derived polymers
Assignee: BP Corp North America Inc
•
Filing: 1986-04-10
•
Granted: 1987-10-06
•
Expires: 2006-04-10
Abstract
Abstract A molding composition containing a compatible blend of (i) a polycarbonate having repeating units derived from bis-(3,5-dimethyl-4-hydroxyphenyl)sulfone (TMBS), optionally a dihydric phenol such as 2,2-bis(4-hydroxyphenyl)propane (Bisphenol A) and a carbonate precursor, and (ii) a vinyl chloride derived polymer.
Inventors
- 👤 Lloyd M. Robeson
- 👤 James E. Harris
- 👤 James H. Kawakami
- 👤 Louis M. Maresca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:27
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L69/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
55 words
A molding composition comprising a compatible blend of: (a) a polycarbonate containing repeating units (I) having the formula: ##STR8## and, optionally, repeating units (II) having the formula: ##STR9## in which repeating units (I) and optionally repeating units (II) are connected by interbonding units derived from a carbonate precursor, and (b) a vinyl chloride derived polymer.
Claim 2
Dependent Claim
55 words
A molding composition comprising a compatible blend of: (a) a polycarbonate containing repeating units (I) having the formula: ##STR8## and, optionally, repeating units (II) having the formula: ##STR9## in which repeating units (I) and optionally repeating units (II) are connected by interbonding units derived from a carbonate precursor, and (b) a vinyl chloride derived polymer.
Claim 3
Dependent Claim
18 words
The molding composition of claim 1 wherein the polycarbonate comprises ordered, alternating repeating units have the formula ##STR10##
Claim 4
Dependent Claim
15 words
The molding composition of claim 1 wherein the vinyl chloride polymer is poly (vinyl chloride).
Claim 5
Dependent Claim
23 words
The molding composition of claim 1 wherein the vinyl chloride polymer is a copolymer of vinyl chloride with an olefinically unsaturated polymerizable compound.
References Cited (Backward Citations)
US3169121A
Cited
US3312660A
Cited
US3737409A
Cited
US3879347A
Cited
US4005037A
Cited
US4105711A
Cited
US4020045A
Cited
US4286083A
Cited
US4297455A
Cited
EP0000547A1
Cited
US4313873A
Cited
US4267303A
Cited
US4260731A
Cited
US4369303A
Cited
US4324869A
Cited
US4349658A
Cited
US4404351A
Cited
US4499257A
Cited
US4594404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |