Hydrogenation and epoxidation of polymers made by controlled...

Details Hydrogenation and epoxidation of polymers made by controlled... Hydrogenation and epoxidation of polymers made by controlled...

2007-10-09

2010-10-12

Cheung, William K (Department: 1796)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S348000

Reexamination Certificate

active

07812108

ABSTRACT:
The present invention discloses a process for synthesizing a hydrogenated polymer that comprises: (1) preparing a aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; (2) initiating polymerization of said monomer within the aqueous polymerization medium to produce a latex of an unsaturated polymer; (3) treating the latex of the unsaturated polymer with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (b) a reducing agent selected from the group consisting of hydrazine and hydrates of hydrazine; and (c) a metal ion activator to produce the hydrogenated polymer.

REFERENCES:
patent: 4452950 (1984-06-01), Wideman
patent: 4581429 (1986-04-01), Solomon et al.
patent: 5039737 (1991-08-01), Parker et al.
patent: 5401804 (1995-03-01), Georges et al.
patent: 5990224 (1999-11-01), Raynolds et al.
patent: 6262169 (2001-07-01), Helmer et al.
patent: 6262206 (2001-07-01), Nesvadba et al.
patent: 6353065 (2002-03-01), Charleux et al.
patent: 6472485 (2002-10-01), MacLeod et al.
patent: 6518364 (2003-02-01), Charmot et al.
patent: 6737488 (2004-05-01), Vanhoorne et al.
patent: 6992156 (2006-01-01), Parker et al.
patent: 7442746 (2008-10-01), Parker
patent: 2004/0110889 (2004-06-01), Yagi et al.
patent: WO 98/32726 (1998-07-01), None
Prokopov N.I., Gritskova I.A. “Characterstic features of heterophase polymerisation of styrene with simultaneous formation of surfactants at the interface”,Russian Chemical Reviews70 (9) 791-800 (2001).
Cunnigham, Michael F. “Living/controlled radical polymerizations in dispersed phase systems” (Prog. Polym. Sci. 27 (2002) 1039-1067).
Butté, Alessandro, et al “Miniemulsion Living Free Radical Polymerization of Styrene” (Macromolecules2000, 33, 3485-3487).
Gilbert, Robert G., et al “RAFT in Emulsion Polymerization: What Makes it Different” (Polymer Preprints2002, 43(2), 130).
Bon, Stefan A.F. et al, “Controlled Radical Polymerization in Emulsion” (Macromolecules1997, 30, 324-326).
Moad, Graeme, et al, “Living freed radical polymerization with reversible addition—fragmentation chain transfer (the life of RAFT)” (Polym Int49:993-1001 (2000)).

Affiliated with

Also associated with

Rating

Hydrogenation and epoxidation of polymers made by controlled... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydrogenation and epoxidation of polymers made by controlled..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrogenation and epoxidation of polymers made by controlled... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4184698