Nylon compositions featuring improved rates of crystallization a

Details Nylon compositions featuring improved rates of crystallization a Nylon compositions featuring improved rates of crystallization a

1994-03-14

1995-05-09

Carrillo, Ana L.

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

Synthetic resins

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

525420, C08L 7700

Patent

active

054140510

ABSTRACT:
Disclosed are compositions and process for the improving the rate or crystallization of polyamide containing compositions which comprise two polyamides having dissimilar melting temperatures, said process comprising the steps of heating the two polyamides to a temperature which is above the melting point of the polyamide having the lower melting temperature but below the melting temperature of the polyamide having the higher melting temperature, as well compositions made in accordance with the process. Preferred polyamides include polycaprolactam and polyhexamethylene adipamide, poly(tetramethylenediamine-co-adipic acid) and further, the inventive compositions may optionally include optional additional constituents. The process provided for improved nucleation without the necessity of inorganic nucleation promoters or agents, and articles made in accordance to the process exhibit good physical properties.

REFERENCES:
patent: 2698966 (1955-01-01), Stott et al.
patent: 3549651 (1970-12-01), Oswald et al.
patent: 4749736 (1988-06-01), Khanna et al.
Nylon Plastics, pp. 424-425, M. I. Kohan, John Wiley & Sons, Pub., (1973).

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