Living radical polymerization method

Details Living radical polymerization method Living radical polymerization method

2008-07-15

2008-07-15

Teskin, Fred M (Department: 1796)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S184000, C526S190000, C526S192000, C526S206000, C526S219200, C556S064000, C556S070000, C556S104000, C502S152000, C502S224000, C502S227000

Reexamination Certificate

active

07399814

ABSTRACT:
A highly active and environment-friendly catalyst for use in a living radical polymerization is provided.A catalyst for use in a living radical polymerization method is provided. The catalyst comprises a central element, which is selected from germanium, tin and antimony, and at least one halogen atom, which is bound to the central element. A monomer having a radical reactive unsaturated bond is subjected to a radical polymerization reaction under the presence of the catalyst, thereby it is possible to obtain a polymer having narrow molecular weight distribution. The present invention has the merits such as low toxicity of the catalyst, a small amount of the catalyst can be used, high solubility of the catalyst, mild reaction conditions, no coloration, no odor (unnecessary post-treatment of molded products). The method of the present invention is more environment-friendly and economical than a conventional living radical polymerization method.

REFERENCES:
patent: 2451871 (1948-10-01), Rochow
patent: 4048095 (1977-09-01), Wojcik et al.
patent: 5312871 (1994-05-01), Mardare et al.
patent: 5403803 (1995-04-01), Shaffer et al.
patent: 6649716 (2003-11-01), Andrekanic et al.
patent: 1378535 (2004-01-01), None
patent: 11-322822 (1999-11-01), None
patent: 2002-249505 (2002-09-01), None
Goto, et al, “Germanium and Tin-Catalyzed Living Radical Polymerization of Styrene”, Polymer Preprints (ACS, Div. Poly. Chem.), 2005, 46(2), 245-246.
Kraus, et al, Studies Relating to Organic Germanium Derivatives. III. Diphenyl Germanium Dihalides and Diphenyl Germanium Imine, JACS, 52, 3690-6 (1930).
Yuezhong, et al, “Free Radical Copolymerization in the Presence of Lewis Acid . . . ”, China Synthetic Rubber Industry, 1990, 13(4), 253-258 (with English language translation).
Krzysztof,Matyjaszewski et al.; “Controller/“Living” Radical Polymerization. Kinetics of the Homogenous Atom Transfer Radical Polymerization of Styrene”; Journal of the American Chemical Society; vol. 199, pp. 674-680, 1997.

Affiliated with

Also associated with

Rating

Living radical polymerization method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Living radical polymerization method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Living radical polymerization method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2760353