Method of forming uniform polymer spheres, composite particles a

Details Method of forming uniform polymer spheres, composite particles a Method of forming uniform polymer spheres, composite particles a

1992-01-17

1993-11-23

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

430137, 521 56, 521 61, 526201, 528486, 528499, C08F 600

Patent

active

052645533

ABSTRACT:
A method for forming fine polymer particles, including core/shell polymer composite particles and polymer-encapsulated liposome particles. A polymer solution is formed using a selective solvent which enables the polymer to be precipitated from the solution upon a change in condition thereof. The change in condition may be effected by lowering of the temperature of the solution and/or introducing a non-solvent to the solution. With respect to the formation of the polymer-encapsulated liposome particles, the liposome particles are included when the polymer solution is formed. One embodiment of the method for forming the core/shell particles includes the selective solvent being immiscible with water to form the polymer solution (oil phase), the addition of deionized water containing an emulsifier to the solution, forming the emulsion, cooling the resulting emulsion to precipitate a one polymer from the emulsion as oil drops leaving the other polymer in solution therein, evaporating the selective solvent solidifying the other polymer thereby encapsulating the one polymer forming the core/shell particles.

REFERENCES:
patent: 3674719 (1972-07-01), Jenkins
patent: 4702840 (1987-10-01), Degen et al.
patent: 4782097 (1988-11-01), Jain et al.
patent: 4885350 (1989-12-01), Yamashita et al.
patent: 4904562 (1990-02-01), Yusa et al.
patent: 5061766 (1991-10-01), Yamashita et al.

Affiliated with

Also associated with

Rating

Method of forming uniform polymer spheres, composite particles a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of forming uniform polymer spheres, composite particles a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming uniform polymer spheres, composite particles a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1850124