Functional perfluoropolyethers and process for the preparation t

Details Functional perfluoropolyethers and process for the preparation t Functional perfluoropolyethers and process for the preparation t

1987-05-27

1989-03-21

Anderson, Harold D.

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

Synthetic resins

Treating polymer containing material or treating a solid...

260544F, 568615, 562586, C08F 600, C07C 4904, C08G 6532

Patent

active

048143723

ABSTRACT:
The process for the scission of high molecular weight perfluoropolyethers having neutral end groups obtained from photo-oxidation processes of perfluoroolefins, or fluorination of hydrogenated polyalkylene oxides, or by polymerization with opening of the partially fluorinated oxetane ring, the scission being carried out in the presence of catalysts selected from the group consisting of fluorides, oxyfluorides and oxides of transition metals, or selected from the group consisting of Al, Sn, and Sb, at temperatures ranging from 150.degree. to 380.degree. C. The scission process leads to the formation of low molecular weight perfluoropolyethers having neutral and acid end groups, the perfluoropolyetheral acids being subjected to conversion reactions in order to obtain functionalized perfluoropolyethers. The products can be used as operative fluids for high vacuum pumps.

REFERENCES:
patent: 3242218 (1966-03-01), Miller
patent: 3665041 (1972-05-01), Sianesi et al.
patent: 3770792 (1973-11-01), Sianesi et al.
patent: 3814741 (1974-06-01), Caporiccio et al.
patent: 3847978 (1974-11-01), Sianesi et al.
patent: 4647413 (1987-03-01), Savn

Affiliated with

Also associated with

Rating

Functional perfluoropolyethers and process for the preparation t does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Functional perfluoropolyethers and process for the preparation t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Functional perfluoropolyethers and process for the preparation t will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-477407