Catalyst, its preparation and the polymerization of cyclic...

Details Catalyst, its preparation and the polymerization of cyclic... Catalyst, its preparation and the polymerization of cyclic...

2008-01-10

2008-11-25

Truong, Duc (Department: 1796)

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

Synthetic resins

From heterocyclic reactant containing as ring atoms oxygen,...

C528S416000, C528S485000, C528S486000, C526S089000, C526S266000, C526S268000, C526S270000, C526S271000, C549S472000, C560S012000, C502S080000, C502S081000, C502S086000

Reexamination Certificate

active

07456249

ABSTRACT:
The present invention relates to a solid, acid catalyst for the preparation of polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer, which has a BET surface area of at least 160 m2/g and an acid center density of at least 0.05 mmol/g for pKavalues of from 1 to 6, to a process for preparing it and to a process for the polymerization of cyclic ethers over this catalyst.

REFERENCES:
patent: 3901826 (1975-08-01), Hofstadt et al.
patent: 4127513 (1978-11-01), Bellis
patent: 4189566 (1980-02-01), Mueller et al.
patent: 4228462 (1980-10-01), van Straaten et al.
patent: 4243799 (1981-01-01), Mueller et al.
patent: 4460796 (1984-07-01), Mueller
patent: 5268345 (1993-12-01), Mueller et al.
patent: 6043338 (2000-03-01), Sigwart et al.
patent: 6274527 (2001-08-01), Belbachir et al.
patent: 6274700 (2001-08-01), Eller et al.
patent: 6362312 (2002-03-01), Eller et al.
patent: 7041752 (2006-05-01), Schlitter et al.
patent: 2004/0220381 (2004-11-01), Schlitter et al.
patent: 1173442 (1964-07-01), None
patent: 2247530 (1972-09-01), None
patent: 2801578 (1979-07-01), None
patent: 19527532 (1997-01-01), None
patent: 19755415 (1999-06-01), None
patent: 19801462 (1999-07-01), None
patent: 0398636 (1990-11-01), None
patent: 0535515 (1993-04-01), None
patent: 915458 (1946-11-01), None
patent: WO-03/002631 (2003-01-01), None
Blatterstrukturen, Klockmanns Mineralogie, Aug. 16, 1978, pp. 739-765.

Affiliated with

Also associated with

Rating

Catalyst, its preparation and the polymerization of cyclic... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Catalyst, its preparation and the polymerization of cyclic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst, its preparation and the polymerization of cyclic... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4033749