Process for the production of finely dispersed polymer mixtures

Details Process for the production of finely dispersed polymer mixtures Process for the production of finely dispersed polymer mixtures

1989-09-22

1992-04-21

Bleutge, John C.

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

Synthetic resins

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

525148, 525197, 525198, 528483, C08J 300

Patent

active

051069067

ABSTRACT:
37 Highly dispersed mixtures of at least two polymers which are not completely miscible in the melt under customary conditions are produced by melting the polymers used in the presence of supercritical gases or mixtures of gases, intensively thoroughly mixing the molten polymers for long enough until the viscosity of the melt has diminished by at least 10%, subsequently cooling the polymer melt with further thorough mixing, until the viscosity of the melt has at least reached the original value again and then depressurizing the polymer melt. The highly dispersed mixtures produced in this way can be processed in the customary manner into mouldings.

REFERENCES:
patent: 4598006 (1986-07-01), Sand
patent: 4745029 (1988-05-01), Kambour
patent: 4820752 (1989-04-01), Berens
patent: 4990595 (1991-02-01), Traechkner
B. J. Schmitt, Ber. Bunsenges, Phys. Chem. 89 (1983), p. 113 et seq.
Ottenbrite, Utracki, Inoue Eds., Current Topics in Polymer Science, vol. II, 1987.
David C. Bonner, Polymer Engineering and Science, Feb. 1977, vol. 17, No. 2, pp. 65-72.
Sanat K. Kumar, Sanjay P. Chhabria, Robert C. Reid and Ulrich W. Suter, 1987 American Chemical Society, Macromolecules 1987, 20, 2550-2557.

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