US 5,292,458 A · Method of producing photosensitive microcapsules

Abstract

A method of producing a photosensitive microcapsule which contains a polymerizable monomer and a polymerization initiator. Soluble water is displaced in the polymerizable monomer by performing one or both of distilling the polymerizable monomer and adding a dehydrating agent to the polymerizable monomer. The polymerization initiator and a first microcapsule-forming material are added to the water-displaced polymerizable monomer to produce a solution. Soluble oxygen in the polymerizable monomer is displaced by performing one or both of bubbling an inert gas and adding an oxygen absorbent to the polymerizable monomer. Soluble oxygen may also be displaced in an ionic surfactant by performing the bubbling and adding of oxygen absorbent. The ionic absorbent is added to the solution containing the polymerizable monomer and polymerization initiator, and then the solution is emulsified. A microcapsule membrane is produced by adding a second microcapsule-forming material to the emulsion.

Claims22

Dependent claims

A method of producing a photosensitive microcapsule which contains a polymerizable monomer and a polymerization initiator to initiate the polymerization of said polymerizable monomer, said method comprising the steps of:

displacing soluble water in said polymerizable monomer;
producing a solution to be contained in the microcapsules by adding the polymerization initiator and a first material for the microcapsule membrane to said polymerizable monomer in which said soluble water is displaced;
producing an emulsion by adding an ionic surfactant solution to said solution to be contained in the microcapsules and emulsifying said solution with an agitator;
and producing a microcapsule membrane by adding a second material for the microcapsule membrane to said emulsion.

1 more element

A method of producing a photosensitive microcapsule which contains a polymerizable monomer and a polymerization initiator, comprising the steps of:

providing a polymerizable monomer containing soluble water;
displacing soluble water in the polymerizable monomer by performing one or both of (1) distilling the polymerizable monomer and (2) adding a dehydrating agent to the polymerizable monomer;
after the displacing step, adding a polymerization initiator and a first microcapsule-forming material to the polymerizable monomer to produce a solution;
displacing soluble oxygen in at least one of the polymerizable monomer and an ionic surfactant by performing at least one of (1) bubbling the polymerizable monomer with an inert gas, (2) bubbling the ionic surfactant with an inert gas, (3) adding an oxygen absorbent to the polymerizable monomer and (4) adding an oxygen absorbent to the surfactant;
adding the ionic surfactant to the solution;
emulsifying the solution and the ionic surfactant to form an emulsion;
and producing a microcapsule membrane by adding a second microcapsule-forming material to the emulsion.

4 more elements

Dependencies are inferred from the claim text.

Method of producing photosensitive microcapsules

Life of this patent

Method of producing photosensitive microcapsules

Life of this patent

Abstract

Claims22