US4223104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copoly (carbonate/phosphonate) compositions
Assignee: Akzo America Inc
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Filing: 1978-08-11
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Granted: 1980-09-16
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Expires: 1998-08-11
Abstract
Abstract Improved copoly(carbonate/phosphonate) compositions formed by reaction of a dihydric phenol, a carbonate precursor, and an organophosphorus dihalide are disclosed. The inherent viscosity and melting point of such compositions is increased by the presence of an effective amount of a chain branching agent, optionally in the additional presence of a chain terminating agent.
Inventors
- 👤 Ki-Soo Kim
- 👤 Arthur J. Yu
- 👤 Siegfried Altscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:46
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/04; C08G64/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
56 words
In a copoly(carbonate/phosphonate) composition formed by the reaction of: (1) at least one dihydric phenol; (2) at least one carbonate precursor; and (3) at least one organophosphorus dihalide, wherein the improvement consists essentially of the presence of an effective amount of a chain branching agent to increase the melting point and inherent viscosity of said composition.
Claim 2
Dependent Claim
56 words
In a copoly(carbonate/phosphonate) composition formed by the reaction of: (1) at least one dihydric phenol; (2) at least one carbonate precursor; and (3) at least one organophosphorus dihalide, wherein the improvement consists essentially of the presence of an effective amount of a chain branching agent to increase the melting point and inherent viscosity of said composition.
Claim 3
Dependent Claim
17 words
A composition as claimed in claim 1 wherein the chain branching agent is a trifunctional phosphorus compound.
Claim 4
Dependent Claim
42 words
A composition as claimed in claim 1 wherein the chain branching agent has a formula selected from the group consisting of P(O)X 3 , P(S)X 3 and PX 3 , where X is selected from the group consisting of chlorine and bromine.
Claim 5
Dependent Claim
15 words
A composition as claimed in claim 3 wherein the chain branching agent is phosphorus oxychloride.
Claim 6
Dependent Claim
26 words
A composition as claimed in claim 1 wherein the chain branching agent has the formula ##STR4## where m is an integer ranging from 3 to 6.
Claim 7
Dependent Claim
32 words
A composition as claimed in claim 1 wherein the amount of chain branching agent ranges from about 0.1 mole % to about 5 mole %, based on the molar amount of phenol.
Claim 8
Dependent Claim
23 words
A composition as claimed in claim 1 which further consists essentially of an effective amount of a chain terminating agent to prevent gelation.
Claim 9
Dependent Claim
14 words
A composition as claimed in claim 5 wherein the chain branching agent is phloroglucinol.
Claim 10
Dependent Claim
14 words
A composition as claimed in claim 5 wherein the chain branching agent is pyrogallol.
Claim 11
Dependent Claim
25 words
A composition as claimed in claim 7 wherein the amount of chain terminating agent ranges from about 0.5 mole % to about 10 mole %.
Claim 12
Dependent Claim
26 words
A composition as claimed in claim 7 wherein the chain terminating agent is selected from the group consisting of the monohydroxy alkyl and aryl chain terminators.
Claim 13
Dependent Claim
38 words
A composition as claimed in claim 1 wherein the chain branching agent is of the general formula ##STR5## where p is an integer of from 1 to 4 and q is an integer of from 2 to 8.
References Cited (Backward Citations)
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Cited
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US3578634A
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US4001183A
Cited
US3766139A
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US3897392A
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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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |