Ternary polymer blends

• US 4,908,418 A
• Filed: 01/29/1982
• Issued: 03/13/1990
• Est. Priority Date: 01/29/1982
• Status: Expired due to Fees

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Holub, Fred F.
• Primary Examiner(s): SHORT, PATRICIA A
• Application Number:
  US06/344,007
• Time in Patent Office: 2,965 Days
• Field of Search: 525/425, 525/433
• US Class Current: 525/425
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 2666/18 Polyesters or polycarbonates according to C08L67/00 - C08L69/00; Derivatives thereof
• CPC Class Codes: C08L 67/03 the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
• CPC Class Codes: C08L 79/08 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors

Abstract

Disclosed are ternary blends of (a) a polyetherimide and (b) a polyarylate, an aromatic polyester which is derived from a dihydric phenol and a dicarboxylic acid and (c) a thermoplastic polymer selected from polycarbonates and aliphatic-aromatic polyesters which is compatible with the polyetherimide and the polyarylate. The blends exhibit a high heat distortion temperature and have a good degree of flame resistance.

Claims

1. A composition comprising a blend of (a) a polyarylate which is derived from at least one dihdyric phenol and at least one aromatic dicarboxylic acid, (b) a polyetherimide and (c) a thermoplastic polymer which is compatible with the blend of the polyarylate and the polyetherimide.

2. A composition as defined in claim 1 wherein the dihydric phenol is of the formula:

##STR17## wherein Y is independently selected from alkyl groups of 1 to 4 carbon atoms, cycloalkyl groups of 6 to 12 carbon atoms, aryl groups of 6 to 12 carbon atoms, aryl group sof 6 to 20 carbon atoms chlorine or bromine, z independently has a value from 0 to 4, inclusive, and R is a divalent saturated aliphatic or aromatic hydrocarbon radical selected from alkylene and alkylidene radicals having from 1 to 8 carbon atoms, cycloalkylene and cycloalkylidene radicals having up to and including 9 carbon atoms and arylene radicals having from 6 to 20 carbon atoms.

3. A composition as defined in claim 2 wherein each z is 0 and R is an alkylidene radical of 3 carbon atoms.

4. A composition as in claim 1 wherein the aromatic dicarboxylic acid in (a) is selected from terephthalic or isophthalic acids, or mixtures thereof.

5. A composition as defined in claim 1 wherein the polyetherimide is of the following formula:

##STR18## wherein a is an integer greater than 1, preferably from about 10 to 10,000 or more, --O--R₂ --O-- is attached to the 3 or 4 and 3'"'"' or 4'"'"' positions and R₂ is selected from

(a) a substituted or unsubstituted aromatic radical such as ##STR19## (b) a divalent radical of the formula;

##STR20## wherein R₄ is independently C₁ to C₆ alkyl, or halogen and R₅ is selected from --O--, --S --, ##STR21## --SO₂ --, --SO--, alkylene of 1 to 6 carbon atoms, cycloalkylene of 4 to 8 carbon atoms and alkylidene of 1 to 6 carbon atoms or cycloalkylidene of 4 to 8 carbon atoms;

R₃ is selected from an aromatic hydrocarbon radical having from 6 to 20 carbon atoms and halogenated derivatives thereof or alkyl substituted derivatives thereof wherein the alkyl group contains 1 to 6 carbon atoms, alkylene and cycloalkylene radicals having from 2 to 20 carbon atoms, C₂ --C₈ alkylene terminated polydiorganosiloxane and a divalent radical of the formula ##STR22## wherein R₄ and R₅ are as previously defined and wherein R₅ may be a direct bond.

6. A composition as defined in claim 1 wherein the polyetherimide is of the following formula:

##STR23## wherein ##STR24## is a member selected from ##STR25## wherein R₆ is independently hydrogen, lower alkyl or lower alkoxy ##STR26## wherein the oxygen may be attached to either ring and located ortho or para to one of the bonds to the anhydride carbonyl group, a is an integer greater than 1preferably from about 10 to about 10,000 or more, R₂ is selected from

(a) a substituted aromatic radical such as ##STR27## (b) a divalent radical of the formula ##STR28## wherein R₄ is independently C₁ to C₆ alkyl, or halogen and R₅ is selected from --O--, --S--, ##STR29## --SO₂ --, --SO--, alkylene of 1 to 6 carbon atoms, cycloalkylene of 4 to 8 carbon atoms and alkylidene of 1 to 6 carbon atoms or cycloalkylidene of 4 to 8 carbon atoms;

R₃ is selected from an aromatic hydrocarbon radical having from 6 to 20 carbon atoms and halogenated derivatives thereof or alkyl substituted derivatives thereof wherein the alkyl group contains 1 to 6 carbon atoms, alkylene and cycloalkylene radicals having from 2 to 20 carbon atoms, C₂ -C₈ alkylene terminated to 20 carbon atoms polydiorganosiloxane and a divalent radical of the formula ##STR30## wherein R₄ and R₅ are as previously defined and wherein R₅ may be a direct bond.

7. A composition as in claims 1, 5, or 6 wherein the polyetherimide is of the following formula:

##STR31##

8. A composition as in claim 1 wherein the thermoplastic polymer is at least one of a polyester or a polycarbonate.

9. A composition as defined in claim 8 wherein the polyester is derived from an aliphatic diol and an aromatic dicarboxylic acid having repeating units of the following general formula:

##STR32##

10. A composition as defined in claim 8 or 9 wherein the polyester is poly(ethylene terephthalate).

11. A composition as defined in claim 8 wherein the polycarbonate is the reaction product of a dihydric phenol and a carbonate precursor.

12. A composition as defined in claims 8 or wherein the dihydric phenol is bisphenol-A and the carbonate precursor is carbonyl chloride.

13. A composition in accordance with claims 8 or 11 wherein the dihydric phenol is bisphenol-A and the carbonate precursor is diphenyl carbonate.

14. A composition in accordance with claim 1 further containing at least one filler.