Appeal No. 96-2323
Application 08/116,555
emulsion of a water-soluble polymer, and claim the emulsion
made thereby. The process includes polymerizing at least one
water-soluble vinyl monomer which is in a water-in-oil
emulsion. The dissolved oxygen concentration of the emulsion
before initiating the polymerization is about 100 ppb or less.
Appellants state that due to the low oxygen concentration, the
formation of agglomerates is inhibited (specification, page
2). Claim 1 is illustrative and reads as follows:
1. A process for preparing a water-in-oil emulsion of a
water-soluble polymer comprising polymerizing at least one
water-soluble vinyl monomer in a water-in-oil emulsion,
wherein the dissolved oxygen concentration of the emulsion
before initiating polymerization is about 100 ppb or less.
THE REFERENCES
References relied upon by the examiner
Fan et al. (Fan) 4,485,209 Nov. 27,
1984
Cadel et al. (Cadel) 4,783,513 Nov. 8,
1988
13 Encyclopedia of Polymer Science and Engineering 776-83
(John Wiley & Sons, 1988).
Reference relied upon by appellants
3 Encyclopedia of Polymer Science and Engineering 279-81 (John
Wiley & Sons, undated).
THE REJECTIONS
2
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