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US3622541A Expired / Lapsed US ⏱️ 0.0 years remaining

Halogen-containing, high-molecular, soluble, thermoplastic polyaryl polyethers

Assignee: Bayer AG
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Filing: 1969-05-09
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Granted: 1971-11-23
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Expires: 1989-05-09
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Abstract

Abstract The invention relates to new halogen-containing, high-molecular, soluble, thermoplastic polyaryl polyethers of the formula (I) in which R1 and R2 denote hydrogen or identical or different alkyl or alkoxy radicals with one to four carbon atoms; Hal is fluorine, chlorine or bromine; Ar is an unsubstituted or substituted phenylene, naphthylene, diphenylene or polynuclear bivalent aromatic radical of the formula (II) where R denotes a bivalent aliphatic, cycloaliphatic or araliphatic radical with one to eight carbon atoms or -O-, -S-, SO-, -SO2-or -CO-, X denotes a halogen atom or the radical -O -Ar -OH, Y denotes a hydrogen atom or the radical AND N DENOTES AN INTEGER FROM ABOUT 3 TO ABOUT 200. These new polyethers are produced by reacting molar amounts of a tetrahalobenzene or of several tetrahalobenzenes of the formula (III) and of a bisphenolate or of several bisphenolates of the formula (IV) Me -O -Ar -O -Me IN WHICH Me denotes an alkali metal, in a polar organic solvent at temperatures between about 80* C. and about 180* C.

Inventors

  • 👤 Gerhard Darsow
  • 👤 Ludwig Bottenbruch
  • 👤 Hermann Schnell

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 20:43
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/23; C08G65/00; C08G65/34; C08G65/38; C08G65/40; C08G65/4006; C08G65/4012; C08G2650/00; C08G2650/28; C08G2650/46; C08G2650/48; Y; Y10; Y10S; Y10S260/00; Y10S260/24

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 9 words
The polyaryl polyether of claim 1 wherein Ar is
Claim 2
Dependent Claim 9 words
The polyaryl polyether of claim 1 wherein Ar is
Claim 3
Dependent Claim 25 words
A process for producing the polyaryl polyether of claim 1 which consists essentially of reacting molar amounts of one or several tetrahalobenzenes of the formula
Claim 4
Dependent Claim 16 words
The process of claim 4 wherein the temperature is from about 120* to about 160* C.
Claim 5
Dependent Claim 11 words
The process of claim 4 wherein the tetrahalobenzene is 1,2,4, 5-tetrachlorobenzene.
Claim 6
Dependent Claim 11 words
The process of claim 4 wherein the tetrahalobenzene is 1,2,4, 5-tetrabromobenzene.
Claim 7
Dependent Claim 8 words
The process of claim 4 wherein Ar is
Claim 8
Dependent Claim 8 words
The process of claim 4 wherein Ar is

References Cited (Backward Citations)

US3306875A Cited
US3257357A Cited
US3257358A Cited
FR1407301A Cited
US3332909A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-11-22 1975-05-24 1975-11-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-11-22 1979-05-24 1979-11-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-11-22 1983-05-24 1983-11-23 $7700.00 Window Closed / Lapsed

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