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Incorporation of additives into polymers

Patent ·
OSTI ID:1174423
;

There has been invented a method for incorporating additives into polymers comprising: (a) forming an aqueous or alcohol-based colloidal system of the polymer; (b) emulsifying the colloidal system with a compressed fluid; and (c) contacting the colloidal polymer with the additive in the presence of the compressed fluid. The colloidal polymer can be contacted with the additive by having the additive in the compressed fluid used for emulsification or by adding the additive to the colloidal system before or after emulsification with the compressed fluid. The invention process can be carried out either as a batch process or as a continuous on-line process.

Research Organization:
The Regents of the University of California, Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-36
Assignee:
The Regents of the University of California (Los Alamos, NM)
Patent Number(s):
6,599,962
Application Number:
09/835,256
OSTI ID:
1174423
Country of Publication:
United States
Language:
English

References (9)

Water-in-Carbon Dioxide Emulsions:  Formation and Stability journal September 1999
Coloured particles by dispersion polymerization journal January 1987
Dispersion polymerization of styrene in polar solvents. 6. Influence of reaction parameters on particle size and molecular weight in poly(N-vinylpyrrolidone)-stabilized reactions journal June 1990
Preparation of colored poly(styrene-co-butyl methacrylate) micrometer size beads with narrow size distribution by dispersion polymerization in presence of dyes journal December 1995
Effect of Surfactants on the Interfacial Tension and Emulsion Formation between Water and Carbon Dioxide journal January 1999
Emulsion Polymerization in a Hybrid Carbon Dioxide/Aqueous Medium journal October 1997
Swelling of Polystyrene Latex Particles in Water by High-Pressure Carbon Dioxide journal May 1997
A Small-Angle Neutron Scattering Study of Water in Carbon Dioxide Microemulsions journal July 1997
Reverse micelles in supercritical fluids. 3. Amino acid solubilization in ethane and propane journal July 1990

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