James L. Turner
Engineering at Whitney Rd, Cleveland, OH

4340702, Jul 20, 1982

Oct 22, 1979

6/086853

George R. Huddleston - Lorain OH
James W. Turner - Bay Village OH

The B. F. Goodrich Company - Akron OH

C08F 226, C08F 620

526 70

There is disclosed a process of preparing vinyl dispersion resins by conducting the polymerization reaction of the vinyl monomer or monomers in an aqueous medium in the presence of a polymerization initiator or catalyst and an emulsifier or emulsifier system to form a vinyl resin latex, which is then subjected to an ultrafiltration step by forcing the same through a semipermeable membrane leaving behind the polymer particles and reusing the permeate, which contains dissolved monomer(s) and emulsifier, in the further production of vinyl resin latices. Unexpectedly, further use of the permeate substantially reduces polymer buildup in the reactor and since the ultrafiltration step increases the polymer particle concentration in the latex, considerable heat energy is saved in the spray-drying step.

4292424, Sep 29, 1981

Mar 3, 1980

6/126789

George R. Huddleston - Lorain OH
James W. Turner - Bay Village OH
Kenneth D. Konter - Washburn IL

The B.F. Goodrich Company - Akron OH

C08F 614, C08F 616

528500

The invention relates to the production of vinyl dispersion or paste resins by means of the emulsion polymerization process and the recovery of the resins from the polymer latices produced thereby. In the process, the polymer latex is first carefully coagulated to yield a fast filtering sludge, the sludge is passed to a pressure filter to separate a high solids, friable polymer wetcake from the serum, the wetcake is rinsed with proper agents to neutralize the same and remove undesirable residues, pressure in the filter is applied to the rinsed wetcake to increase the solids content thereof, the wetcake is then broken into particles and friable agglomerates, and thereafter said particles and agglomerates are dried and ground to proper size in one step in a fluid energy mill. Thus the spray drying and the subsequent harsh grinding steps are eliminated producing a superior product for plastisols.

4286081, Aug 25, 1981

Dec 20, 1979

6/105694

Bela K. Mikofalvy - Avon Lake OH
James W. Turner - Bay Village OH

The BF Goodrich Company - Akron OH

C08F 1406

526 74

There is disclosed a process for preparing vinyl dispersion resins by conducting the polymerization reaction of the vinyl monomer or monomers in an aqueous alkaline medium, using an oil-soluble polymerization initiator, at low temperatures, in the presence of an emulsifier and, optionally, at least one long straight chain alcohol containing from 14 to 24 carbon atoms, and in the presence of an electrolyte, such as for example, ammonium carbonate ((NH. sub. 4). sub. 2 CO. sub. 3), and wherein the reaction ingredients are thoroughly mixed, or homogenized, prior to polymerization. The aqueous emulsion of the polymer(s) so produced are capable of being dried into friable aggregates of individual spheres of polymer particles. The dried resin can easily be formulated into plastisols of high North Fineness and high gloss. In addition, polymer buildup in the reactor is reduced.

4292420, Sep 29, 1981

Dec 20, 1979

6/105693

James W. Turner - Bay Village OH
Bela K. Mikofalvy - Avon Lake OH

The B. F. Goodrich Company - Akron OH

C08F 1406

526212

A method for drying a polymer latex comprising mixing with said latex a partially fugitive gas producing electrolyte and filtering said latex to recover the polymer.

4098978, Jul 4, 1978

Nov 12, 1975

5/630981

Bela Kalman Mikofalvy - Avon Lake OH
James Wilson Turner - Bay Village OH

The B. F. Goodrich Company - Akron OH

C08F 226, C08F11406

526 81

At least one vinylidene halide monomer is polymerized in an aqueous emulsion medium in admixture with ammonium persulfate and at least one ammoniated anionic emulsifier, preferably also together with hydrogen peroxide. The polymerization process is maintained at a pH of at least about 8. 5 using ammonium hydroxide. The polymerization process is conducted in the substantial absence of alkali metal ions. Polymerization is both rapid and linear. The resulting polymers have excellent heat stability and water whitening resistance.