Process for producing capsules having walls of a waxy material

Claim 2

A PROCESS FOR PRODUCING CONTROLLED PARTICLE SIZE CAPSULES CONSISTING ESSENTIALLY OF WALLS OF A SINGLE WAXY MATERIAL SURROUNDING A SINGLE CORE MATERIAL, SAID PROCESS COMPRISING DROPWISE DISPERSING A WAXY MATERIAL CONTAINING A CORE MATERIAL PARTICLE IN A FIRST AGITATE AQUEOUS MEDIUM MAINTAINED AT A TEMPERATURE HIGHER THAN THE MELTING POINT OF THE WAXY MATERIAL, AND ALLOYING THE WAXY MATERIAL CONTAINING SAID CORE MATERIAL PARTICLE TO FALL BY GRAVITY FROM SAID FIRST AGITATED AQUEOUS MEDIUM INTO A SECOND NON-AGITATED AQUEOUS MEDIUM MAINTAINED AT A TEMPERATURE LOWER THAN THE METLING POINT OF THE WAXY MATERIAL THEREBY FORMING SAID CAPSULES, THE SIZE OF THE CAPSULES BEING REGULATED BY THE AMOUNT OF AGITATION IN SAID FIRST AQUEOUS MEDIUM.

Claim 3

The process as claimed in claim 1, wherein said waxy material has a melting point of from 50* to 100*C.

Claim 4

The process as claimed in claim 2, wherein said waxy material is a member selected from the group consisting of Japanese tallow, cotton wax and turpentine.

Claim 5

The process as claimed in claim 2, wherein said waxy material is a member selected from the group consisting of beeswax, whale wax and hydrous lanolin.

Claim 6

The process as claimed in claim 2, wherein said waxy material is a member selected from the group consisting of paraffin and chlorinated paraffin.

Claim 7

The process as claimed in claim 2, wherein said waxy material is a member selected from the group consisting of a polyethylene having a molecular weight lower than 5000, a denatured wax, a denatured rosin, a hardened oil, a fatty acid, a long chain alcohol, a fatty acid ester and an amide.

Claim 8

The process as claimed in claim 1, wherein said aqueous medium is water.

Claim 9

The process as claimed in claim 1, wherein said aqueous medium is an aqueous solution of a member selected from the group consisting of an inorganic salt, an organic salt, gum arabic, gelatin, polyvinyl alcohol and cellulose.

Claim 10

The process as claimed in claim 1, wherein said aqueous medium is an aqueous dispersion of a member selected from the group consisting of silica, kaolin and starch.

Claim 11

The process according to claim 1 wherein said first and second aqueous mediums are contained in a container having a constricted boundary between the upper and lower portions of said container, said first aqueous medium maintained at a temperature higher than the melting point of said waxy material being in the upper portion of said container and said second aqueous medium maintained at a temperature lower than the melting point of said waxy material being in the lower portion of said container, wherein said waxy material containing said core material particle is allowed to fall by gravity from the upper portion of said container containing said first aqueous medium into the lower portion of said container containing said second aqueous medium through the constricted boundary, the boundary being constricted to assure that said second aqueous medium is not agitated due to the agitation of said first aqueous medium in the upper portion of said container.

Claim 12

A process for producing controlled particle size capsules consisting essentially of walls of a single waxy material surrounding a single core material particle, said process comprising: dispersing core material particles in a waxy material with heating at a temperature higher than the melting point of the waxy material forming a dispersion of said core material particles in said waxy material; adding dropwise the resulting dispersion to a first agitated aqueous medium maintained at a temperature higher than the melting point of the waxy material; and allowing the waxy material containing said core material particle to fall by gravity from said first agitated aqueous medium into a second non-agitated aqueous medium maintained at a temperature lower than the melting point of said waxy material thereby forming said capsules, the size of the capsules being regulated by the amount of agitation in said first aqueous medium and also by the original size of said core material particles.

Claim 13

A process for producing controlled particle size capsules consisting essentially of walls of a single waxy material surrounding a single core material particle, said process comprising: dispersing core material particles in a waxy material with heating at a temperature higher than the melting point of the waxy material forming a dispersion of said core material particles in said waxy material; adding dropwise the resulting dispersion to a first agitated aqueous medium maintained at a temperature higher than the melting point of the waxy material; and allowing the waxy material containing said core material particle to fall by gravity from said first agitated aqueous medium into a second non-agitated aqueous medium maintained at a temperature lower than the melting point of said waxy material thereby forming said capsules, the size of the capsules being regulated by the amount of agitation in said first aqueous medium and also by the original size of said core material particles.

Claim 14

A process for producing controlled particle size capsules consisting essentially of walls of a single waxy material surrounding a single core material particle, said process comprising: dispersing core material particles in a waxy material with heating at a temperature higher than the melting point of the waxy material to form a dispersion of said core material particles in said waxy material; drying the resulting dispersion to obtain solid particles consisting of said waxy material surrounding individual particles of said core material; adding dropwise said solid particles to a first agitated aqueous medium maintained at a temperature higher than the melting point of the waxy material; and allowing said solid particles to fall by gravity from said first agitated medium into a second non-agitated aqueous medium maintained at a temperature lower than the melting point of said waxy material thereby forming said capsules, the size of the capsules being regulated by the amount of agitation in said first aqueous medium and also by the original size of said core material particles.

Claim 15

A process for producing controlled particle size capsules consisting essentially of walls of a single waxy material surrounding a single core material particle, said process comprising: dispersing core material particles in a waxy material with heating at a temperature higher than the melting point of the waxy material to form a dispersion of said core material particles in said waxy material; drying the resulting dispersion to obtain solid particles consisting of said waxy material surrounding individual particles of said core material; adding dropwise said solid particles to a first agitated aqueous medium maintained at a temperature higher than the melting point of the waxy material; and allowing said solid particles to fall by gravity from said first agitated medium into a second non-agitated aqueous medium maintained at a temperature lower than the melting point of said waxy material thereby forming said capsules, the size of the capsules being regulated by the amount of agitation in said first aqueous medium and also by the original size of said core material particles.