Claims
- 1. A polymer blend which comprises from about 60% to about 99% by weight of a polyphenylene ether and from about 1% to about 40% by weight of a siloxane polyetherimide copolymer which contains from about 20 to about 50 mol % of repeating units of the formula: ##STR16## and from about 50 to about 80 mole % of repeating units of the formula: ##STR17## wherein n and m independently are integers from 1 to about 10; g is an integer from about 5 to about 25; T is --O-- or a group of the formula
- --O--Z--O--
- wherein the divalent bonds of the --O-- or the --O--Z--O-- group are in the 3,3', 3,4', 4,3' or 4,4' positions; Z is a member of the group consisting of (A) ##STR18## and (B) divalent organic radicals of the general formula ##STR19## where X is a member selected from the group consisting of divalent radicals of the formulas ##STR20## where y is an integer from 1 to about 5; and R is a divalent organic radical selected from the group consisting of (a) aromatic hydrocarbon radicals having from 6 to about 20 carbon atoms and halogenated derivatives thereof, (b) alkylene radicals having from 2 to about 20 carbon atoms, cycloalkylene radicals having from 3 to about 20 carbon atoms, and (c) divalent radicals of the general formula ##STR21## where Q is a member selected from the group consisting of ##STR22## and x is an integer from 1 to about 5.
- 2. The polymer blend of claim 1, wherein the siloxane polyetherimide copolymer further contains repeating units of the formula ##STR23## wherein M is selected from the group consisting of ##STR24## where B is --S-- or ##STR25## and R is as defined in claim 1.
- 3. The polymer blend of claim 2, wherein n and m are integers from 1 to about 5.
- 4. The polymer blend of claim 3, wherein g has an average value from 9 to about 20.
- 5. The polymer blend of claim 1, 2 or 3 wherein the siloxane polyetherimide copolymer is a substantially random copolymer.
- 6. The polymer blend of claim 1, 2 or 3, wherein the siloxane polyetherimide copolymer is a block copolymer.
- 7. The polymer blend of claim 1, 2 or 3, wherein the siloxane polyetherimide copolymer is an alternating copolymer.
- 8. The polymer blend of claim 1, wherein the polyphenylene ether comprises repeating units of the formula: ##STR26## wherein the oxygen ether atom of one structural unit is connected to the benzene nucleus of the next adjoining unit, b is a positive integer and is at least 50 and Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4, which may be the same or different, are monovalent substitutents selected from the group consisting of hydrogen, halogen, hydrocarbon radicals, halohydrocarboxy radicals and halohydrocarboxy radicals having at least two carbon atoms between the halogen atom and the benzene nucleus.
- 9. The polymer blend of claim 8, wherein Y.sub.1 is methyl, Y.sub.2 phenyl and Y.sub.3 and Y.sub.4 are hydrogen.
- 10. The polymer blend of claim 8, wherein Y.sub.1 and Y.sub.2 are methyl and Y.sub.3 and Y.sub.4 are hydrogen.
- 11. The polymer blend of claim 8, wherein Y.sub.1 and Y.sub.2 are phenyl and Y.sub.3 and Y.sub.4 are hydrogen.
- 12. The polymer blend of claim 8, wherein the polyphenylene ether is a copolymer which contains repeating units of the formula shown in claim 8, in which Y.sub.1 and Y.sub.2 are methyl and Y.sub.3 and Y.sub.4 are hydrogen and repeating units of the formula shown in claim 8, in which Y.sub.1, Y.sub.2 and Y.sub.4 are methyl and Y.sub.3 is hydrogen.
- 13. The polymer blend of claim 8, wherein the polyphenylene ether has an intrinsic viscosity, measured in chloroform at 25.degree. C., of at least 0.1 dl/g.
- 14. The polymer blend of claim 13, wherein the intrinsic viscosity ranges from about 0.4 dl/g to about 0.6 dl/g.
- 15. The polymer blend of claim 1, wherein the organosiloxane-containing repeating unit constitutes from about 25 to about 40 mole % of the siloxane polyetherimide copolymer.
- 16. The polymer blend of claim 1, which contains from about 3% to about 25% by wt. of the siloxane polyetherimide copolymer.
- 17. The polymer blend of claim 1, which further contains fillers, pigments, reinforcing agents, plasticizers or mixtures thereof.
Parent Case Info
This is a continuation of application Ser. No. 07/563,750, filed Aug. 3, 1990, now abandoned, which, is a continuation of application Ser. No. 304,907, filed Feb. 1, 1989, now abandoned, which is a continuation of Ser. No. 046,192, filed May 5, 1987, now abandoned.
US Referenced Citations (13)
Foreign Referenced Citations (5)
Number |
Date |
Country |
91118 |
Oct 1983 |
EPX |
2116836 |
Oct 1971 |
DEX |
257010 |
Nov 1969 |
SUX |
1353501 |
May 1974 |
GBX |
8602593 |
May 1986 |
WOX |
Non-Patent Literature Citations (2)
Entry |
Flame Retardancy of Polymeric Materials, vol. 2, W. C. Kuryla and A. J. Papa (Eds.), Marcel Dekker, New York 1973, p. 157. |
Koton, M. M. and Florinski, F. S. Zh. Org. Khin., 4 (5), 744 (1968). |
Continuations (3)
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Number |
Date |
Country |
Parent |
563750 |
Aug 1990 |
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Parent |
304907 |
Feb 1989 |
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Parent |
46192 |
May 1987 |
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