US4385167A
Expired / Lapsed
US
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Preparation of polyphenylene ether resins
Assignee: General Electric Co
•
Filing: 1980-08-04
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Granted: 1983-05-24
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Expires: 2000-08-04
Abstract
Abstract An improved method for the preparation of polyphenylene oxides is disclosed. The method comprises using a diamine catalyst system comprising a cupric compound, coupling the phenolic monomer in the absence of methanol, and adding a promoter to the reaction mixture.
Inventors
- 👤 Daniel E. Floryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:23
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/44
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
67 words
In a process for the preparation of a polyphenylene oxide resin by the oxidative coupling of a phenolic monomer in the presence of oxygen and a diamine catalyst system, the improvement which comprises using a diamine catalyst system comprising a cupric salt, coupling the phenolic monomer in the absence of methanol, and adding a promoter consisting essentially of a sulfite or bisulfite salt to the reaction mixture.
Claim 2
Dependent Claim
67 words
In a process for the preparation of a polyphenylene oxide resin by the oxidative coupling of a phenolic monomer in the presence of oxygen and a diamine catalyst system, the improvement which comprises using a diamine catalyst system comprising a cupric salt, coupling the phenolic monomer in the absence of methanol, and adding a promoter consisting essentially of a sulfite or bisulfite salt to the reaction mixture.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the cupric salt is cupric chloride.
Claim 4
Dependent Claim
15 words
The process of claim 1, wherein the promoter is an alkali metal sulfite or bisulfite.
Claim 5
Dependent Claim
14 words
The process of claim 3 wherein the promoter is sodium sulfite or sodium bisulfite.
Claim 6
Dependent Claim
84 words
The process of claim 1 wherein the phenolic monomer is a compound of formula ##STR3## wherein X is selected from the group of hydrogen, chlorine, bromine, and iodine and Q is a monovalent substituent selected from the group consisting of hydrogen, halogen, hydrocarbon radicals free of tertiary alpha-carbon atom, halohydrocarbon radicals having at least two carbon atoms between the halogen atom and the phenyl nucleus, hydrocarbonoxy radicals, and halohydrocarbonoxy radicals having at least two carbon atoms between the halogen atom and the phenyl nucleus.
Claim 7
Dependent Claim
24 words
The process of claim 1 wherein the diamine catalyst system also comprises a hindered secondary diamine and a tertiary amine with low steric requirements.
Claim 8
Dependent Claim
16 words
The process of claim 6 wherein the diamine catalyst system also comprises N,N'-di-tert-butylethylene diamine and n-butyldimethylamine.
References Cited (Backward Citations)
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US3544515A
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US3544516A
Cited
US3787362A
Cited
US3796689A
Cited
US4058504A
Cited
US4211857A
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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) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |