Increasing the molecular weight of polycondensates and...

Details Increasing the molecular weight of polycondensates and... Increasing the molecular weight of polycondensates and...

C - Chemistry, Metallurgy

08

K

C08K 5/3435 (2006.01) C08G 59/26 (2006.01) C08J 11/04 (2006.01) C08L 63/00 (2006.01) C08L 67/00 (2006.01) C08L 69/00 (2006.01) C08L 77/00 (2006.01)

Patent

CA 2259890

The invention relates to a process for increasing the molecular weight of polycondensates and at the same time stabilizing them, essentially without crosslinking, which comprises heating a polyamide, a polyester, a polycarbonate or a copolymer or blend of these polymers with addition of at least one diepoxide comprising terminal epoxide groups and as a further structural element a tetramethylpiperidine radical located centrally between the epoxide groups to a temperature which is above the melting point of the polymer in the case of crystalline polycondensates or above the glass point in the case of amorphous polycondensates. The invention additionally relates to mixtures comprising the corresponding diepoxides, to their use, and to polycondensates prepared from them.

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