Method for the production of homo-, co- and block copolymers

Details Method for the production of homo-, co- and block copolymers Method for the production of homo-, co- and block copolymers

2007-04-03

2007-04-03

Wu, David W. (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S200000, C526S317100, C526S347000

Reexamination Certificate

active

10515937

ABSTRACT:
A process is described for producing homo-, co- and block copolymers by controlled radical polymerization in aqueous solution, wherein a monomer component (A) consisting of at least one radically polymerizable monomer, an initiator component (B) consisting of at least one radical initiator, a polysaccharide component (C) consisting of at least one cyclic polysaccharide (derivative) and a regulator component (D) consisting of at least one compound of the general formula (Ia) or/and (Ib) are reacted in the presence of water,in which R1to R6can each independently denote hydrogen, an optionally substituted C1–C20alkyl residue, C3–C8cycloalkyl residue, C7–C34aralkyl residue or optionally an aromatic C6–C14hydrocarbon residue and R2and R5can additionally denote polymer residues having an average molecular mass (number average) of 100 to 50,000 Daltons, and at least two but at most four of the residues R1to R6represent an aromatic hydrocarbon residue. In this manner it is possible to produce polymers with a very narrow molecular weight distribution. Moreover, due to the much lower amounts of initiator and regulator compared to the prior art, the polymers contain only very small amounts of regulator and initiator decomposition products.

REFERENCES:
patent: 4235735 (1980-11-01), Marco et al.
patent: 4925588 (1990-05-01), Berrod et al.
patent: 5227446 (1993-07-01), Denzinger et al.
patent: 5760129 (1998-06-01), Lau
patent: 5763548 (1998-06-01), Matyjaszewski et al.
patent: 5807937 (1998-09-01), Matyjaszewski et al.
patent: 6165455 (2000-12-01), Torgerson et al.
patent: 6864337 (2005-03-01), Yuasa et al.
patent: 6875832 (2005-04-01), White et al.
patent: 2003/0130416 (2003-07-01), Flosbach et al.
patent: 2003/0170306 (2003-09-01), Raether et al.
patent: 2004/0176534 (2004-09-01), Rogers et al.
patent: 196 37 190 (1997-03-01), None
patent: 100 27 744 (2001-12-01), None
patent: 100 29 694 (2001-12-01), None
patent: 10027746 (2001-12-01), None
patent: 1 560 559 (1969-03-01), None
patent: WO-00 39169 (2000-07-01), None

Affiliated with

Also associated with

Rating

Method for the production of homo-, co- and block copolymers 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 for the production of homo-, co- and block copolymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the production of homo-, co- and block copolymers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3728224