Tri-blend resin of PBI, PAEK, and PEI

Details Tri-blend resin of PBI, PAEK, and PEI Tri-blend resin of PBI, PAEK, and PEI

2007-02-06

2009-12-08

Woodward, Ana L (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S420000, C525S425000, C525S432000, C525S436000, C525S931000

Reexamination Certificate

active

07629420

ABSTRACT:
A polymer blend comprises PBI, PAEK, and PEI. A method of making the foregoing blend comprises the steps of intimately blending PBI, PAEK, and PEI by dissolving PBI, PAEK, and PEI in a strong acid or melt blending PBI, PAEK, and PEI.

REFERENCES:
patent: 4912176 (1990-03-01), Alvarez et al.
patent: 4973630 (1990-11-01), Leung et al.
patent: 5380477 (1995-01-01), Kent et al.
patent: 6753365 (2004-06-01), Brown et al.
patent: 2004/0005474 (2004-01-01), Charnock et al.

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