Single step preparation of block copolymer of polyamides

Details Single step preparation of block copolymer of polyamides Single step preparation of block copolymer of polyamides

1976-11-08

1977-08-23

Lieberman, Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 78R, 260 78A, C08L 7700

Patent

active

040440710

ABSTRACT:
Process for forming block copolymer involves mixing dry salt of a prepolyamide and a molten melt-spinnable polyamide. Mixture is heated to a temperature in the range of between from the melting point of higher melting component of the mixture to below amide-interchange temperature of a blend of the melt-spinnable polyamide and the homopolymer which would result from the polymerization of the salt. Mixing and heating is continued until substantially all of the salt and the polyamide are converted into a block copolymer. The latter can be used to make fibers. One example of a suitable salt is a 30203-6 salt.

REFERENCES:
patent: 2577621 (1951-12-01), May
patent: 3397107 (1968-08-01), Kimura
patent: 3499853 (1970-03-01), Griebsch
patent: 3509106 (1970-04-01), Lotz
patent: 3549724 (1970-12-01), Okazaki
patent: 3683047 (1972-08-01), Honda
patent: 3729449 (1973-04-01), Kimura
patent: 3863609 (1974-10-01), Kimura
patent: 3882090 (1975-05-01), Fagerburg

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