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(12)United States Patent Blair et al.

(10) Patent N0.: US 7,273,570 B2 (45) Date of Patent: Sep. 25, 2007

2004/0241430 A1 12/2004 Jachucketal. FOREIGN PATENT DOCUMENTS

(54) (75)

(73) (*)

(21) (22) (65)

(51)

METHOD OF FORMING POLYMER PARTICLES

Inventors: StewartW. Blair,Rochester,NY (US); LloydA.Lobo,Rochester,NY (US);

TomasG.McHugh,Webster,NY (US)

Assignee: Eastman Kodak Company, Rochester, NY (US)

0 499 363 B1 1 152 832 B1 1 464 389 A1 6 169 125 B1

00/48728

02/18328 A1 03/008083 03/008460

8/1995

9/2002 10/2004 4/2005 8/2000 3/2002 1/2003 1/2003

(56)

References Cited U.S. PATENT DOCUMENTS

Notice:

Subjecttoanydisclaimer,thetermofthis patentisextendedoradjustedunder35 U.S.C. 154(b) by 146 days.

Appl.No.:11/178,091

OTHER PUBLICATIONS

R.J.J. Jachuck et al., “Process Intensi?cation: Removal of an Organic Component From an Aqueous Emulsion Using Spinning DisReactorTechnology”,HeatRecoverySystemsandCHP, 1994, vol. 14, No. 5, pp. 475-491.

* cited by examiner

Primary ExamineriMary Lynn Theisen (74)Attorney,Agent,orFirmiCarlF.RuoiT

(57) ABSTRACT

Thepresentinventionisamethodofmanufacturingpolymer particles. The method includes providing an oil in Water emulsion,Whereintheoilphasecomprisesavolatilesolvent and at least one Water insoluble polymer. The volatile solvent has a solubility of not more than 10% in Water and theWaterinsolublepolymerhasaWeightaveragemolecular Weight of at least 2000. The Water insoluble polymer is soluble in the volatile solvent. The emulsion is supplied to a rotating surface of a rotating surface reactor. The tempera tureoftherotatingsurfaceismaintainedattheboilingpoint of said solvent or greater. The rotating surface of the reactor spins at a speed sufficient to cause the emulsion to spread over the rotating surface as a continuously ?owing thin ?lm Wherein a vapor phase containing the volatile solvent is removed. The Water insoluble polymer particles are then collected as a slurry of polymer particles and Water.

15Claims,1DrawingSheet

Filed:

Jul.8,2005

Prior Publication Data US 2007/0007677A1 Jan.11,2007

Int. Cl.

B29B 9/10

(52)US. Cl. .......................................................... 264/8 (58) Field of Classi?cation Search ................... 264/8;

425/8 See application ?le for complete search history.

(2006.01)

3,597,176 A * 8/1971 Plumat ....................... 65/21.2 4,070,325 A 1/1978 Burke, Jr. 4,374,074A*2/1983Uedaetal.....................264/8

4,833,060A 6,380,297 Bl 6,515,153 B2 6,858,189 B1

5/1989 Nairetal. 4/2002 Zionetal. 2/2003 Burns et a1. 2/2005 Ramshawetal. 3/2002 Burns et a1. 8/2003 Ramshawetal.

11/2004 Grayetal.

2002/0035281 A1 2003/0161767 A1 2004/0235039 A1

US007273570B2

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