Ternary polymer blends containing a polyetherimide, a polyphthalate carbonate, and rubber modified vinyl aromatic polymer

• US 4,855,356 A
• Filed: 12/30/1987
• Issued: 08/08/1989
• Est. Priority Date: 12/30/1987
• Status: Expired due to Fees

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Rock, John A., Holub, Fred F.
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US07/139,578
• Time in Patent Office: 587 Days
• Field of Search: 525/66, 525/67, 525/133, 525/146, 525/92, 525/148
• US Class Current: 525/66
• CPC Class Codes: C08L 25/06 Polystyrene
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• CPC Class Codes: C08L 69/005 Polyester-carbonates
• CPC Class Codes: C08L 79/08 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors

Abstract

The present invention relates to ternary polymer blends containing (a) a polyetherimide, (b) a rubber modified vinyl aromatic polymer, and (c) a polyphthalate carbonate. The blends have excellent high temperature properties, improved impact resistance values and have excellent flexural values.

Claims

1. A ternary polymer blend comprising in admixture (a) a polyetherimide, (b) a rubber modified vinyl aromatic polymer, and (c) a polyphthalate carbonate prepared from a dihydric phenol, a carbonate precursor, a terephthalic acid or ester-forming derivative thereof, an isophthalic acid or ester-forming derivative thereof, said polyphthalate carbonate having from about 70 to 95 weight percent ester content and a range of terephthalate groups ranging from about 2 to about 15 percent of the ester content, wherein the rubber modified vinyl aromatic polymer is selected from the group consisting of methyl methacrylate-butadiene-styrene, styrene-ethylene-butylene-styrene, acrylonitrile-butadiene-styrene and high impact polystyrene.

2. The ternary blend of claim 1 wherein said polyetherimide includes repeating groups of the formula:

##STR18## where a represents a whole number in excess of 1, the group --O--A<

is selected from;

##STR19## R₁ being hydrogen, lower alkyl or lower alkoxy, Z is a member of the class consisting of (1);

##STR20## and (2) divalent organic radicals of the general formula;

##STR21## where X is a member selected from the class consisting of divalent radicals of the formulas;

##STR22## where q is 0 or 1, y is a whole number from 1 to 5, and R is a divalent organic radical selected from the class consisting of (1) aromatic hydrocarbon radicals having from 6 to about 10 carbon atoms and halogenated derivatives thereof, (2) alkylene radicals and cycloalkylene radicals having from 2 to about 20 carbon atoms, (3) C₂ to about C₈ alkylene terminated polydiorganosiloxane, and (4) divalent radicals included by the formula;

##STR23## where Q is a member selected from the class consisting of;

##STR24## where x is a whole number from 1 to 5 inclusive.

3. The ternary blend of claim 2 wherein the polyetherimide is of the formula:

##STR25##

4. The ternary blend of claim 3 wherein Z is:

##STR26## and R is selected from;

##STR27##

5. The ternary blend of claim 4 wherein the polyetherimide is of the formula:

##STR28##

6. The ternary blend of claim 4, wherein the polyetherimide further includes repeating units of the formula ##STR29## where R is previously defined and M is selected from the group consisting of ##STR30## where B is --S-- or ##STR31##

7. The ternary blend of claim 1 wherein the weight percent ester content is from about 75 to 90.

8. The ternary blend of claim 1 wherein the range of terephthalate groups range from about five to about 10 percent of the ester content.

9. The ternary blend of claim 1 wherein the dihydric phenol is bisphenol A.

10. The ternary blend of claim 1 wherein the rubber modified vinyl aromatic polymer is high impact polystyrene.

11. The ternary blend of claim 1 wherein the rubber modified vinyl aromatic polymer is methyl-methacrylate-butadiene-styrene.

12. The ternary blend of claim 1 wherein the rubber modified vinyl aromatic compound is styrene-ethylene-butylene-styrene.

13. The ternary blend of claim 1 wherein from about 1 to about 98 percent by weight is said polyetherimide, from about 1 to about 98 percent by weight is said rubber modified vinyl aromatic polymer and from about 1 to about 98 percent by weight is said polyphthalate carbonate.

14. The ternary blend of claim 13 wherein from about 1 to about 96 percent by weight is said polyetherimide, from about 3 to 20 percent by weight is said rubber modified vinyl aromatic polymer and from about 1 to 96 percent by weight is said polyphthalate carbonate.

15. The ternary blend of claim 14 wherein said rubber modified vinyl aromatic polymer is high impact polystyrene.