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US4710531A Expired / Lapsed US ⏱️ 0.0 years remaining

Self-extinguishing polycarbonate composition

Assignee: ENICHEM TECNORESINE SpA AN ITALIAN Co
•
Filing: 1983-08-19
•
Granted: 1987-12-01
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Expires: 2003-08-19
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Abstract

Abstract Self-extinguishing polycarbonates are disclosed, which consist of mixtures of polycarbonates with at least one salt of metals of the I and/or the II A and B Groups of the Periodic Table, and/or ammonium salts of organic carboxylic compounds having the general formula (I) <IMAGE> (I) and, as an adjuvant, at least one compound which is a member selected from the group consisting of the following classes of compounds: (i) a halogenated phenyl ether; (ii) a phthalimide or naphthalimide; (iii) an organic sulphone or a derivative thereof; (iv) an inorganic compound selected from the group consisting of halides of alkali metals or of alkaline earth metals, oxides of metals of the Groups IB,VIB,VIIB,IIIA,IVA and VIII of the Periodic Table, of the lanthanide group, carbon black and the residues of the pyrolysis of the organic acid salts of formula (I).

Inventors

  • 👤 Giovanni Dozzi
  • 👤 Giorgio Della Fortuna
  • 👤 Salvatore Cucinella

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 11:40
CPC Classifications
C; C08; C08K; C08K5/00; C08K13/00; C08K13/02; C08K3/00; C08K3/02; C08K3/04; C08K3/16; C08K3/18; C08K3/20; C08K3/22; C08K5/04; C08K5/06; C08K5/09; C08K5/36; C08K5/41

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 92 words
A self-extinguishing polycarbonate composition consisting of an aromatic polycarbonate having an average viscometric molecular weight between 10,000 and 100,000 mixed with (A) at least one metal salt and/or ammonium salt of ethylenediaminotetraacetic acid, said metal being selected from the metals of Groups IA, IB, IIA or IIB of the Periodic Table; and (B) a halogenated organic ether having the general formula (II) ##STR7## wherein n is an integer from 0 to 10,000 and X can be, independently, hydrogen, fluorine, chlorine or bromine, wherein at least one X per aromatic ring is halogen.
Claim 2
Dependent Claim 92 words
A self-extinguishing polycarbonate composition consisting of an aromatic polycarbonate having an average viscometric molecular weight between 10,000 and 100,000 mixed with (A) at least one metal salt and/or ammonium salt of ethylenediaminotetraacetic acid, said metal being selected from the metals of Groups IA, IB, IIA or IIB of the Periodic Table; and (B) a halogenated organic ether having the general formula (II) ##STR7## wherein n is an integer from 0 to 10,000 and X can be, independently, hydrogen, fluorine, chlorine or bromine, wherein at least one X per aromatic ring is halogen.
Claim 3
Dependent Claim 15 words
The composition of claim 1, wherein said halogenated organic ether is a halogenated biphenyl oxide.
Claim 4
Dependent Claim 16 words
A composition as defined in claim 2, wherein said halogenated organic ether is decabromobiphenyloxide or octabromobiphenyloxide.
Claim 5
Dependent Claim 43 words
A composition as defined in claim 1, wherein said salt component (A) is selected from the sodium, potassium or ammonium salts of ethylenediaminotetraacetic acid, or mixtures thereof; and said halogenated organic ether (B) is selected from octabromobiphenyloxide, decabromobiphenyloxide, brominated polyphenyleneoxide, or mixtures thereof.

References Cited (Backward Citations)

US3492268A Cited
US3836490A Cited
US4263201A Cited
US4632953A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-11-30 1991-06-01 1991-12-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-11-30 1995-06-01 1995-12-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-11-30 1999-06-01 1999-12-01 $7700.00 Window Closed / Lapsed

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