US4506045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose ester-aliphatic polycarbonate thermoplastic moulding compositions
Assignee: Bayer AG
•
Filing: 1983-09-14
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Granted: 1985-03-19
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Expires: 2003-09-14
Abstract
Abstract Thermoplastic moulding compositions consisting of from 1 to 99% by weight of at least one cellulose ester or cellulose mixed ester, from 99 to 1% by weight of an aliphatic polyester or polyether containing carbonate groups and, optionally, standard auxiliaries and additives.
Inventors
- 👤 Helmut Waniczek
- 👤 Christian Lindner
- 👤 Carlhans Suling
- 👤 Herbert Bartl
- 👤 Walter Uerdingen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:33
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08L1/10; C08L69/00; Y; Y10; Y10S; Y10S525/00; Y10S525/932
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
52 words
A thermoplastic moulding composition consisting of I. from 1 to 99% by weight of at least one cellulose ester or cellulose mixed ester; and II. from 99 to 1% by weight of an aliphatic polyester or polyether containing carbonate groups in the polymer chain as linkage and optionally standard auxiliaries and additives.
Claim 2
Dependent Claim
52 words
A thermoplastic moulding composition consisting of I. from 1 to 99% by weight of at least one cellulose ester or cellulose mixed ester; and II. from 99 to 1% by weight of an aliphatic polyester or polyether containing carbonate groups in the polymer chain as linkage and optionally standard auxiliaries and additives.
Claim 3
Dependent Claim
111 words
A thermoplastic moulding composition as claimed in Claim 1, wherein component II is a compound of the following recurring structural unit I ##STR5## in which X' are the same or different residues of a polyester having a molecular weight of from 200 to 6000 X'=X or are the same or different residues of aliphatic polyethers having a molecular weight of from 200 to 20000, 1 is an integer of from 1 to 20 n=0 or is an integer of from 1 to 20 and m is an integer of ≧20, and in that the compounds have an intrinsic viscosity η in tetrahydrofuran of from 0.5 to 2.5 dl/g at 25° C.
Claim 4
Dependent Claim
30 words
A thermoplastic moulding composition as claimed in claim 1 consisting of from 80 to 97 % by weight of component I from 3 to 20% by weight of component II.
Claim 5
Dependent Claim
29 words
A moulding composition as claimed in claim 3 consisting of from 85 to 95% by weight of component I and from 5 to 15% by weight of component II.
Claim 6
Dependent Claim
30 words
A moulding composition as claimed in claim 1 consisting of from 1 to 50% by weight of component I and from 50 to 99 % by weight of component II.
Claim 7
Dependent Claim
30 words
A moulding composition as claimed in claim 5 consisting of from 10 to 35% by weight of component I and from 90 to 65 % by weight of component II.
Claim 8
Dependent Claim
39 words
A moulding composition as claimed in claim 2 wherein in the general formula I the residue X' has a molecular weight of from 1000 to 2500 and the residue X has a molecular weight of from 200 to 1000.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-18 | 1988-09-17 | 1989-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-18 | 1992-09-17 | 1993-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-18 | 1996-09-17 | 1997-03-19 | $7700.00 | Window Closed / Lapsed |