Melt strength improvement of pet

Details Melt strength improvement of pet Melt strength improvement of pet

C - Chemistry, Metallurgy

08

K

6/220, 400/7643

C08K 5/09 (2006.01) C08K 5/20 (2006.01) C08L 67/00 (2006.01)

Patent

CA 1148680

Abstract of the Disclosure A composition and method for improving the thermoplastic processing characteristics of poly(ethylene terephthalate) (PET) in amorphous form are disclosed, as well as PET with improved melt strength. The composition comprises (A) a polyanhydride selected from the group consisting of pyromellitic dianhydride, mellitic trianhydride, tetrahydrofuran dianhydride, and polyanhydrides containing at least two unsubstituted or substituted phthalic anhydride radicals; and (B) a fatty acid or N-substituted fatty acid amide having at least 10 carbon atoms in the acid portion of the molecule. The polyanhydride is present in the com- position in an amount of from 0.1% to 3% by weight, based on the PET.

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