Process for improving the melt flow index of thermoplastic polym

Details Process for improving the melt flow index of thermoplastic polym Process for improving the melt flow index of thermoplastic polym

1986-12-23

1988-08-23

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528950, 523109, 264 16, 264 406, 264343, 525938, 433224, C08J 318, A61C 502

Patent

active

047662000

ABSTRACT:
A novel process for providing a thermoplastic polymer having unique thermal characteristics including the step of cooling the polymer during extended mastication until the melt index of the polymer is substantially increased.

REFERENCES:
patent: 2333242 (1943-11-01), Fryling
patent: 2693461 (1954-11-01), Jones
patent: 3256227 (1966-06-01), Kraus
patent: 3414557 (1968-12-01), Kraus et al.
patent: 3634381 (1972-01-01), Lehnerer et al.
patent: 3839250 (1974-10-01), Ehrend et al.
Yee et al, "Three Dimensional Obturation of the Root Canal Using Injection Molded, Thermoplasticized Dental Gutta-Percha"--Journal of Endodontics, vol. 3, No. 5, May, 1977.
Marlin et al, "Clinical Use of Injection Molded Thermoplasticized Gutta-Percha for Obturation of the Root Canal System: A Preliminary Report"--Journal of Endodontics, vol. 7, No. 6, Jun., 1981.
Lugassy et al, "Root Canal Obturation with Gutta-Percha: A Scanning Electron Microscope Comparison of Vertical Compaction and Automated Thermatic Condensation"--Journal of Endodontics, vol. 8, No. 3, Mar. 1982.

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