Process for the production of polymer microparticles

Details Process for the production of polymer microparticles Process for the production of polymer microparticles

2009-01-22

2011-11-15

Egwim, Kelechi (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S072000, C524S801000

Reexamination Certificate

active

08058370

ABSTRACT:
The object of the present invention is to provide a process for producing high-quality polymer microparticles having uniform particle size of the order of several micrometers to tens of micrometers by inverse suspension polymerization at high productivity while keeping excellent dispersion stability without causing aggregation among particles. The process is one for the production of polymer microparticles by inverse suspension polymerization of a vinyl monomer and includes steps of preparing in a dispersing tank a water-in-oil (W/O) type emulsion in which an organic solvent is a continuous phase and an aqueous solution of a vinyl-based monomer is a dispersing phase, and conducting the inverse suspension polymerization while feeding the water-in-oil (W/O) type emulsion to a continuous stirred tank reactor.

REFERENCES:
patent: 5149720 (1992-09-01), DesMarais et al.
patent: 5827909 (1998-10-01), DesMarais
patent: 6323250 (2001-11-01), Kadonaga et al.
patent: 1 298 146 (2003-04-01), None
patent: 5 222107 (1993-08-01), None
patent: 9 43898 (1997-02-01), None
patent: 10 512187 (1998-11-01), None
patent: 2001 11106 (2001-01-01), None
patent: 2001011106 (2001-01-01), None
patent: 2003 26706 (2003-01-01), None
patent: 2003026706 (2003-01-01), None
patent: 2003 34725 (2003-02-01), None
patent: 2003 516429 (2003-05-01), None
patent: 2003 301019 (2003-10-01), None
patent: 2004 262747 (2004-09-01), None
patent: 2008 63409 (2008-03-01), None
U.S. Appl. No. 12/865,028, filed Jul. 28, 2010, Gotou, et al.
U.S. Appl. No. 12/811,658, filed Jul. 2, 2010, Gotou, et al.
U.S. Appl. No. 12/811,385, filed Jul. 1, 2010, Gotou, et al.

Affiliated with

Also associated with

Rating

Process for the production of polymer microparticles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the production of polymer microparticles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of polymer microparticles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4290594