Latex processes
AssigneeXerox Corporation
InventorsHadi K. Mahabadi, Grazyna E. Kmiecik-Lawrynowicz, T. Hwee Ng
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Abstract
A process for the preparation of polymer latex particles by conducting a pre-reaction emulsification with monomer, polar comonomer, water, surfactant, chain transfer agent, and initiator; and which pre-reaction emulsification is effected at a low temperature of from about 3.degree. C. to about 35.degree. C., for example, and thereafter, effecting emulsion polymerization by heating the aforementioned emulsified mixture in a reactor at a temperature of from about 25.degree. C. to about 125.degree. C. The aforementioned reactor contents are retained at this temperature, that is 25.degree. C. to 125.degree. C. for an effective time period. Thereafter, the reaction mixture is cooled.
Claims16
A process for the preparation of polymer latex particles comprising
- (a) conducting a pre-reaction emulsification which comprises emulsification of the polymerization reagents of monomer, polar comonomer, water, surfactant, chain transfer agent, and initiator, and wherein said emulsification is accomplished at a low temperature of from about 3.degree. to about 35.degree. C.;
- and
- (b) accomplishing an emulsion polymerization, which comprises heating the emulsified mixture of (a) in a reactor at from about 25.degree. to 125.degree. C. and retaining the contents of the reactor at said temperature of from about 25.degree. to 1250.degree. C., followed by cooling, and wherein said pre-reaction emulsification is accomplished with a mechanical stirrer at a stirring rate of from about 50 to about 600 rpm for about 15 to about 60 minutes.
A process for the preparation of polymer latex particles comprising
- (a) conducting a pre-reaction emulsification which comprises emulsification of the polymerization reagents of monomer, polar comonomer, water, surfactant, chain transfer agent, and initiator;
- and
- (b) accomplishing an emulsion polymerization, which comprises heating the emulsified mixture of (a) for an effective time period of from about 1 to about 7 hours, followed by cooling, and wherein said pre-reaction emulsification is accomplished with a mechanical stirrer at a stirring rate of from about 50 to about 600 rpm for about 15 to about 60 minutes.
Dependencies are inferred from the claim text.