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US4783522A Expired / Lapsed US ⏱️ 0.0 years remaining

Aromatic polythioetherimide

Assignee: Mitsubishi Chemical Corp
•
Filing: 1986-07-11
•
Granted: 1988-11-08
•
Expires: 2006-07-11
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Abstract

Abstract An aromatic polythioetherimide having a recurring unit of the following general formula (II): <IMAGE> (II) wherein -Ar-, which may be the same or different in the polymer, each represents a divalent aromatic residue and <IMAGE> which may be the same or different in the polymer, each represents <IMAGE> The aromatic polythioetherimides can be melt-molded, are excellent in the balance of mechanical properties and heat resistance, and can be widely used for parts in the electric and electronic fields, housings, automobile parts, aircraft interior parts, sliding parts, gears, cams, insulating materials, heat-resistant films, heat-resistant varnishes, heat-resistant fibers, etc., and preferably can be used as an engineering plastic for gears, cams, etc., and a heat-resistant insulating film material for electronic hardwares.

Inventors

  • 👤 Mitsutoshi Aritomi
  • 👤 Makoto Terauchi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 08:54
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/1064

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 143 words
An aromatic polythioetherimide having a recurring unit of the following general formula (II): ##STR19## wherein --Ar--, which is the same or different in the polymer, each represents a divalent aromatic residue and ##STR20## which is the same or different in the polymer, each represents ##STR21## and wherein said divalent aromatic residue has the following general formula: ##STR22## wherein A represents --O--, --CO--, --SO--, --SO 2 -- or --C g H 2g -- in which g is an integer of from 1 to 10, Y represents an alkyl group having 1 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, halogen or a nitro group and, b, c, d and e each is 0 or an integer of from 1 to 4.
Claim 2
Dependent Claim 143 words
An aromatic polythioetherimide having a recurring unit of the following general formula (II): ##STR19## wherein --Ar--, which is the same or different in the polymer, each represents a divalent aromatic residue and ##STR20## which is the same or different in the polymer, each represents ##STR21## and wherein said divalent aromatic residue has the following general formula: ##STR22## wherein A represents --O--, --CO--, --SO--, --SO 2 -- or --C g H 2g -- in which g is an integer of from 1 to 10, Y represents an alkyl group having 1 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, halogen or a nitro group and, b, c, d and e each is 0 or an integer of from 1 to 4.

References Cited (Backward Citations)

US4197397A Cited
US4405770A Cited
US4716216A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-11-08 1992-05-09 1992-11-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-11-08 1996-05-09 1996-11-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-11-08 2000-05-09 2000-11-08 $7700.00 Window Closed / Lapsed

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