§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US4046835A Expired / Lapsed US ⏱️ 0.0 years remaining

Polymers with imide groups, and comprising a polyester free from aliphatic unsaturation

Assignee: Rhone Poulenc Industries SA
•
Filing: 1976-03-03
•
Granted: 1977-09-06
•
Expires: 1996-03-03
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A polymer is disclosed that results from the reaction of: A. a polyimide of the formula: ##STR1## in which the symbol D represents a divalent radical selected from the class consisting of the radicals ##STR2## WHERE Y represents H, CH 3 or Cl and m is 0 or 1, the symbol A represents an organic radical of valency n which may contain up to 30 carbon atoms, and n represents a number at least equal to 2; B. a polyamine of the formula (NH.sub.2).sub.p B (II) in which the symbol B represents an organic radical of valency p which may contain up to 30 carbon atoms, and p represents a number at least equal to 2; and C. a linear polyester, free from aliphatic unsaturation, and of molecular weight at least equal to 1,500, the amounts of these reactants being such that there are 1.2 to 5 imide groups per NH 2 group, and the polyester represents up to 50% of the weight of the polyimide/polyamine/polyester combination. A process for making the polymer is also disclosed.

Inventors

  • 👤 Max Gruffaz
  • 👤 Jean-Louis Locatelli

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 05:21
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 168 words
A polymer resulting from the reaction of: a. a polyimide of the formula ##STR8## in which the symbol D represents a divalent radical selected from the class consisting of the radicals ##STR9## where Y represents H, CH 3 or Cl and m is 0 or 1, the symbol A represents an organic radical of valency n which may contain up to 30 carbon atoms, and n represents a number at least equal to 2; b. a polyamine of the formula (NH.sub.2).sub.p B (II) in which the symbol B represents an organic radical of valency p which may contain up to 30 carbon atoms, and p represents a number at least equal to 2; and c. a linear polyester, free from aliphatic unsaturation, and of molecular weight at least equal to 1,500, the amounts of these reactants being such that there are 1.2 to 5 imide groups per NH 2 group, and the polyester represents at least 5% and up to 50% of the weight of the polyimide/polyamine/polyester combination.
Claim 2
Dependent Claim 168 words
A polymer resulting from the reaction of: a. a polyimide of the formula ##STR8## in which the symbol D represents a divalent radical selected from the class consisting of the radicals ##STR9## where Y represents H, CH 3 or Cl and m is 0 or 1, the symbol A represents an organic radical of valency n which may contain up to 30 carbon atoms, and n represents a number at least equal to 2; b. a polyamine of the formula (NH.sub.2).sub.p B (II) in which the symbol B represents an organic radical of valency p which may contain up to 30 carbon atoms, and p represents a number at least equal to 2; and c. a linear polyester, free from aliphatic unsaturation, and of molecular weight at least equal to 1,500, the amounts of these reactants being such that there are 1.2 to 5 imide groups per NH 2 group, and the polyester represents at least 5% and up to 50% of the weight of the polyimide/polyamine/polyester combination.
Claim 3
Dependent Claim 42 words
A polymer according to claim 1, wherein the linear polyester has a molecular weight of between 2,000 and 30,000 and is derived from one or more acids selected from the class consisting of adipic acid, sebacic acid, isophthalic acid and terephthalic acid.
Claim 4
Dependent Claim 35 words
A process for the preparation of a polymer according to claim 1, consisting essentially in heating the mixture of reactants comprising the polyimide, the polyamine and the linear polyester at between 50° and 350° C.
Claim 5
Dependent Claim 14 words
A polymer according to claim 1, when in the form of a shaped article.

References Cited (Backward Citations)

US3717615A Cited
US3766302A Cited
US3712933A Cited
US3970714A Cited
US3972960A Cited
US3998787A Cited
US3763273A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-09-05 1981-03-07 1981-09-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-09-05 1985-03-07 1985-09-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-09-05 1989-03-07 1989-09-06 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag