Flame retardant copolyester-carbonate compositions

• US 4,454,275 A
• Filed: 08/11/1982
• Issued: 06/12/1984
• Est. Priority Date: 02/20/1981
• Status: Expired due to Term

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Rosenquist, Niles R.
• Primary Examiner(s): Hayes, Lorenzo B.
• Assistant Examiner(s): Morgan, Kriellion
• Application Number:
  US06/407,129
• Time in Patent Office: 671 Days
• Field of Search: 528/193, 528/194, 528/176, 524/164, 524/611, 524/612, 524/94, 525/146, 525/165
• US Class Current: 524/164
• CPC Class Codes: C08K 5/42 Sulfonic acids; Derivatives thereof
• CPC Class Codes: C08L 101/02 characterised by the presence of specified groups , e.g. terminal or pendant functional groups
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 27/12 containing fluorine atoms
• CPC Class Codes: C08L 27/18 Homopolymers or copolymers or tetrafluoroethene
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• CPC Class Codes: C08L 69/005 Polyester-carbonates

Abstract

An improved flame retardant polyester-carbonate composition comprised of an admixture of (i) an aromatic polyester-carbonate, (ii) an organic alkali metal salt of sulfonic acid or an organic alkaline earth metal salt of sulfonic acid or mixtures thereof, and (iii) a fluorinated polyolefin.

Claims

1. An aromatic copolyester carbonate composition which obtains a pass rating under the procedures of a modified ASTM D-3713 consisting essentially of in admixture

(i) a nonhalogenated aromatic copolyester carbonate derived from a dihydric phenol, an aromatic dicarboxylic acid, reactive derivative of an acid or mixtures thereof, and a carbonate precursor, said aromatic dicarboxylic acid or reactive derivative thereof being present as residue in the aromatic polyestercarbonate in a mole percent of from about 25 to about 90 mole percent based on the moles of dihydric phenol;

(ii) a flame retardant effective amount of at least one compound selected from the group consisting of alkali metal salts of an organic sulfonic acid and alkaline earth metal salts of organic sulfonic acid;

(iii) an anti-dripping effective amount of a type 3 fluorinated polyolefin; and

(iv) the essential absence of glass fibers.

2. The composition of claim 1 wherein said alkali metal salts of organic sulfonic acid and alkaline earth metal salts of organic sulfonic acid are derived from acid selected from the group consisting of:

unsubstituted monomeric or polymeric sulfonic acids;

monomeric or polymeric aromatic sulfonesulfonic acids;

sulfonic acids of aromatic ketones;

heterocyclic sulfonic acids;

sulfonic acids of aromatic sulfides;

monomeric or polymeric aromatic ether sulfonic acids;

olefinic sulfonic acids;

monomeric or polymeric phenol ester sulfonic acids;

sulfonic acids of monomeric and polymeric aromatic carboxylic acids and esters;

halocycloaliphatic aromatic sulfonic acids;

monomeric or polymeric aromatic sulfonic acids; and

mixtures thereof.

3. The composition of claim 2 wherein said fluorinated polyolefin is polytetrafluoroethylene.

4. The composition of claim 3 wherein said amount of polytetrafluoroethylene is from about 0.05 to about 0.5 weight percent based on the weight of the polyester-carbonate resin.

5. The composition of claim 2 wherein said flame retardant amount is from about 0.2 to about 2 weight percent based on the weight of the polyester-carbonate resin.

6. The composition of claim 1 wherein said dihydric phenol is bisphenol-A.

7. The composition of claim 6 wherein said carbonate precursor is phosgene.

8. The composition of claim 7 wherein the copolyester-carbonate is derived from a reactive derivative of dicarboxylic acid and said reactive derivative is selected from the group consisting of isophthaloyl dichloride, terephthaloyl dichloride, and mixtures thereof.

9. The composition in accordance with claim 8 wherein the dicarboxylic acid reactive derivative residue is present in the aromatic copolyester-carbonate in a mole percent of from about 35 to about 80 mole percent.

10. The composition of claim 1 wherein the alkali metal salt of organic sulfonic acid is sodium 2,4,5-trichlorobenzenesulfonate.

11. An aromatic copolyester-carbonate composition which obtains a pass rating under the procedures of a modified ASTM D-3713 consisting essentially of in admixture

(i) an non-halogenated aromatic copolyester carbonate derived from a dihydric phenol, an aromatic dicarboxylic acid or reactive derivative thereof, and a carbonate precursor, said aromatic dicarboxylic acid or reactive derivative thereof being present in the aromatic polyestercarbonate in a mole percent of from about 25 to about 90 mole percent based on the moles of dihydric phenol;

(ii) a flame retardant effective amount of at least one compound selected from the group consisting of alkali metal salts of an organic sulfonic acid and alkaline earth metal salts of organic sulfonic acid;

(iii) an anti-dripping effective amount of a type 3 fluorinated polyolefin.