Microspheric opacifying agents and method for their production

Details Microspheric opacifying agents and method for their production Microspheric opacifying agents and method for their production

1974-09-23

1980-12-16

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

106308M, 106308N, 162158, 260 294R, 427373, 428306, 428309, 428327, 521 65, 521188, B01J 1302, C08J 928

Patent

active

042396468

ABSTRACT:
Microspheric opacifying agents are provided by admixing an aqueous, partially condensed, aldehyde condensation product with an oily material containing an emulsifying agent thereby forming a water-in-oil emulsion, admixing an amphiphilic acid catalyst with the emulsion and polymerizing the condensation product to form discrete, substantially spherical, opaque, solid particles. Additionally, the solid particles may be separated from the oily continuous phase and admixed with water for the further removal of oily material, and thereby causing the formation of spherical agglomerates or "super particles" having a substantially greater opacity than the aforesaid discrete particles. The super particles are hollow, substantially spherical particles having substantially spherical, discontinuous walls composed of agglomerated substantially spherical particles.

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