Claims
- 1. A single phase, compatiblized ternary blend comprising a polycarbonate resin, a polyester resin, and no more than about 5%, by weight, based on the combined weights of polycarbonate resin and polyester resin, of an oligomeric or polymeric liquid crystalline additive, as a compatibilizer.
- 2. A blend as claimed in claim 1 wherein additive is a segmented liquid crystalline block copolymer which comprises up to 500 unit(s) of the general formula:
- --[[Rod].sub.x --[Coil].sub.y ]--
- where "Rod" indicates the mesogenic block, with x ranging from 2 to 15 and indicating the number of mesogen repeats, "Coil" indicating the block comprising a flexible coil polyester segment, with y ranging from about 2 to about 25 and indicating the number of repeat units in the flexible polyester block.
- 3. A blend as claimed in claim 2 wherein the mesogenic unit in the block copolymer is of the general formula:
- --[--OArC(O)O(CH.sub.2).sub.n OC(O)ArOC(O)ArC(O)--]--.sub.x
- where Ar represents phenyl with para- bond sites, n is an integer of from 2 to 10, and x is an integer of from about 5 to about 15.
- 4. A blend as claimed in claim 2 wherein the flexible coil blocks comprise polybutylene terephthalate.
- 5. A blend as claimed in claim 3 wherein the flexible coil blocks comprise polybutylene terephthalate.
- 6. A blend as claimed in claim i wherein the additive is a thermotropic, essentially liquid crystalline oligomer comprising aromatic units and at least one linear polyalkylene spacer therein.
- 7. A blend as claimed in claim 6 wherein the aromatic units are aromatic ester units.
- 8. A blend as claimed in claim 6 wherein the oligomer comprises three aromatic units.
- 9. A blend as claimed in claim 6 wherein the polyalkylene spacer comprises from about two to about ten carbon atoms.
- 10. A blend as claimed in claim 7 wherein the polyalkylene spacer comprises from about two to about ten carbon atoms.
- 11. A blend as claimed in claim 8 wherein the polyalkylene spacer comprises from about two to about ten carbon atoms.
- 12. A blend as claimed in claim 6 wherein the oligomer has a weight average molecular weight of no more than about 6,000 and comprises aromatic ester units and a linear polyalkylene spacer.
- 13. A blend as claimed in claim 12 wherein the oligomer comprises three aromatic groups and wherein the spacer contains from about two to about ten carbon atoms.
Parent Case Info
This is a continuation-in-part of U.S. Ser. No. 08/309,289, filed Sep. 20, 1994, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (1)
Number |
Date |
Country |
58-185645 |
Oct 1983 |
JPX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
309289 |
Sep 1994 |
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