The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 1981
Filed:
May. 21, 1979
Ronald Golden, Mt. Prospect, IL (US);
Mabrin P Powell, Mason, OH (US);
Champion International Corporation, Stamford, CT (US);
Abstract
Opacifying agents of improved structural integrity and light scattering ability are disclosed. These agents are composed of hollow, substantially spherical agglomerates having discontinuous walls composed of solid, spherical microparticles. The microparticles are produced by admixing an aqueous, partially condensed aldehyde condensation product with an oily non-solvent material and an emulsifying agent to produce a water-in-oil emulsion. Polymerization acid catalyst is then admixed with the emulsion to produce the discrete, substantially spherical and opaque, solid microparticles. After inverting the emulsion to oil-in-water form and adding oil-soluble resin adhesive, elevated temperature is used to cure the adhesive while evaporatively removing residual oily non-solvent. This yields improved agglomerate opacifying agents of high physical stability.