Method of preparing propionic acid-terminated polymers

Details Method of preparing propionic acid-terminated polymers Method of preparing propionic acid-terminated polymers

2005-01-21

2009-10-27

Rábago, Roberto (Department: 1796)

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

Synthetic resins

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

C525S061000, C525S259000, C525S307000, C525S326100, C525S328800, C525S329700, C525S330300, C525S404000, C525S408000, C525S409000, C525S523000, C525S530000, C525S531000

Reexamination Certificate

active

07608663

ABSTRACT:
The invention provides methods for preparing polymers bearing a terminal propionic acid. The method involves first reacting a water soluble and non-peptidic polymer comprising at least one hydroxyl group with a tertiary alkyl acrylate in the presence of a catalyst to form a propionic acid ester of the polymer, wherein the polymer has a weight average molecular weight of at least about 10,000 Da; and then treating the propionic acid ester of the polymer with a strong acid to form a propionic acid of the polymer.

REFERENCES:
patent: 4248786 (1981-02-01), Batz et al.
patent: 4670417 (1987-06-01), Iwasaki et al.
patent: 4943626 (1990-07-01), McGrath et al.
patent: 4948915 (1990-08-01), Keen
patent: 4996356 (1991-02-01), Takahashi et al.
patent: 5034559 (1991-07-01), Hickmann
patent: 5081285 (1992-01-01), Unruh et al.
patent: 5157075 (1992-10-01), Kanai et al.
patent: 5256819 (1993-10-01), Fried
patent: 5328955 (1994-07-01), Rhee et al.
patent: 5483008 (1996-01-01), Sakurai et al.
patent: 5523479 (1996-06-01), Sanders et al.
patent: 5614549 (1997-03-01), Greenwald et al.
patent: 5672662 (1997-09-01), Harris et al.
patent: 5681567 (1997-10-01), Martinez et al.
patent: 5840900 (1998-11-01), Greenwald et al.
patent: 6441136 (2002-08-01), Pettit
patent: 6495659 (2002-12-01), Bentley et al.
patent: 6583272 (2003-06-01), Bailon
patent: 2004/0219131 (2004-11-01), Patten et al.
patent: 0067029 (1986-04-01), None
patent: 2000-204153 (2000-07-01), None
patent: 2000204153 (2000-07-01), None
patent: WO 92/01474 (1992-02-01), None
patent: WO 97/03106 (1997-01-01), None
patent: WO 99/45964 (1999-09-01), None
English translation of JP 2000-204153, published Jul. 2000.
http://www.sejinbio.co.kr/single-arm%20PE.htm, downloaded Dec. 8, 2008.
Quotation SW041102-02SS, Shearwater Corporation, 2002.
Invoice No. 001229, Shearwater Corporation, 2002.
Invoice No. 001380, Shearwater Corporation, 2002.
Invoice No. 001381, Nektar Therapeutics, 2002.
Invoice No. 001574, Shearwater Corporation, 2002.
Invoice No. 000965, Nektar Therapeutics, 2002.
Invoice No. 002867, Nektar Therapeutics, 2003.

Affiliated with

Also associated with

Rating

Method of preparing propionic acid-terminated polymers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of preparing propionic acid-terminated polymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of preparing propionic acid-terminated polymers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4057288