Microcapsular opacifiers and method for their production

Details Microcapsular opacifiers and method for their production Microcapsular opacifiers and method for their production

1974-07-12

1986-02-25

Lovering, Richard D.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

106300, 106312, 210651, 42721331, 42721336, 521 76, 521 92, 521920, B01J 1302, C09D 500

Patent

active

045728690

ABSTRACT:
Air-containing microcapsular opacifiers, optionally containing pigment particles incorporated in the microcapsular structure, have substantially continuous, organic polymeric solid walls and a particle diameter of about 0.5 micron to about 10 microns, e.g., less than 1 or 2 microns. The opacifiers are produced by heating precursor microcapsules containing a liquid core material to a temperature sufficient to substantially drive off the core material from the precursor microcapsules and replace it with air.

REFERENCES:
patent: 2885303 (1959-05-01), Kaplan
patent: 3516846 (1970-06-01), Matson
patent: 3516941 (1970-06-01), Matson
patent: 3585149 (1971-06-01), Vassiliades et al.
patent: 3615972 (1971-10-01), Morehouse, Jr. et al.
patent: 3669899 (1972-06-01), Vassiliades et al.
patent: 3839064 (1974-10-01), Vincent

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