Process for preparing regulated molecular weight perfluoro-polye

Details Process for preparing regulated molecular weight perfluoro-polye Process for preparing regulated molecular weight perfluoro-polye

1986-11-13

1988-11-29

Anderson, Harold D.

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

Synthetic resins

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

568615, 260544F, 562586, 528485, C07C 5158, C07C 4904, C08G 6532

Patent

active

047882573

ABSTRACT:
A process for the dissociation of high molecular weight perfluoropolyethers to obtain low molecular weight perfluoropolyethers which comprises treating a perfluoropolyether with 0.1-10% by weight of a catalyst consisting of Ti, Cr, Mn, Fe, Co, Ni, V, Cu, Mo, Sn, Sb, Zr, Zn oxides at temperatures comprised between 150.degree. and 380.degree. C.

REFERENCES:
patent: 2854490 (1958-09-01), Fischer et al.
patent: 3847978 (1974-11-01), Sianesi et al.

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