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Patent US5120800A successfully refreshed from Google Patents.
US5120800A
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Process for preparing modified-polyphenylene ether
Assignee: Mitsubishi Chemical Corp
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Filing: 1991-04-05
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Granted: 1992-06-09
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Expires: 2011-04-05
Abstract
Abstract Disclosed are processes for preparing a process for preparing a modified polyphenylene ether which comprises reacting any one of a borane compound having at least one boron-hydrogen bond, an α,β-unsaturated carbonyl compound or a mercaptane having a carbonyl group, a hydroxyl group or an alkoxysilyl group with a polyphenylene ether having a carbon-carbon unsaturated bond in a substituent, and optionally oxidizing the resulting borane-modified PPE under alkaline conditions.
Inventors
- 👤 Toru Tsukahara
- 👤 Mitsutoshi Aritomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:48
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/48; C08G65/485; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A process for preparing an alcoholic hydroxyl group-modified polyphenylene ether which comprises reacting a borane compound having at least one boron-hydrogen bond and represented by the formula: ##STR4## wherein R 1 and R 2 independently represent a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, a hydrocarbonoxy group or a halogen atom, with a polyphenylene ether having a carbon-carbon unsaturated bond in a substituent, and then reacting an oxidizing agent to the formed borane-modified a polyphenylene ether under alkaline conditions.
Claim 2
Dependent Claim
83 words
A process for preparing an alcoholic hydroxyl group-modified polyphenylene ether which comprises reacting a borane compound having at least one boron-hydrogen bond and represented by the formula: ##STR4## wherein R 1 and R 2 independently represent a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, a hydrocarbonoxy group or a halogen atom, with a polyphenylene ether having a carbon-carbon unsaturated bond in a substituent, and then reacting an oxidizing agent to the formed borane-modified a polyphenylene ether under alkaline conditions.
Claim 3
Dependent Claim
13 words
The process according to claim 1, wherein said polyphenylene ether contains 2-allyl-6-methylphenol unit.
Claim 4
Dependent Claim
17 words
The process according to claim 1, wherein said polyphenylene ether is a copolymer of 2-allyl-6-methylphenol and 2,6-dimethylphenol.
Claim 5
Dependent Claim
19 words
The process according to claim 1, wherein the borane compound is borane-tetrahydrofurane complex, borane-pyridine complex, borane-methylsulfide complex or 9-borabicyclo[3.3.1]nonane.
Claim 6
Dependent Claim
13 words
The process according to claim 1, wherein said oxidizing agent is hydrogen peroxide.
References Cited (Backward Citations)
US3262911A
Cited
US3281393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-09 | 1995-12-09 | 1996-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-09 | 1999-12-09 | 2000-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-09 | 2003-12-09 | 2004-06-09 | $7700.00 | Window Closed / Lapsed |