Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1979-05-21
1981-04-28
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 63, 521 65, 521136, 521187, 521188, C08J 928
Patent
active
042647428
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.
REFERENCES:
patent: 3585149 (1971-06-01), Vassiliodes et al.
patent: 3669899 (1972-06-01), Vassiliodes et al.
patent: 3779957 (1973-12-01), Vassiliodes et al.
patent: 3781230 (1973-12-01), Vassiliodes et al.
patent: 3928272 (1975-12-01), Brancato et al.
Golden Ronald
Powell Mabrin P.
Champion International Corporation
Foelak Morton
Sommer Evelyn M.
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