Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1975-06-02
1977-12-20
Gwinnell, Harry J.
Coating processes
With post-treatment of coating or coating material
Heating or drying
106312, 252316, 260 25R, 260 25M, 427379, 427388A, 427388C, B05D 302
Patent
active
040642941
ABSTRACT:
Microcapsules are produced in-situ in a film or during the manufacturing process of a water-based coating composition from which the film is formed. A principal process involves the in-situ production of void-containing microcapsules in a film formed from a water-based coating. This principal process involves as a first step the preparation of a polymer composition which may be a homogeneous solution containing a water-immiscible organic polymer, a water-immiscible solvent for the polymer, and a water-immiscible lower volatility non-solvent which is miscible with the solvent; or an emulsion containing as the continuous phase a water-immiscible organic polymer dissolved in a water-immiscible solvent for the polymer and, as the discontinuous phase, droplets of a lower volatility non-solvent dispersed in the continuous phase. This polymer composition is then emulsified under agitation and in the presence of a surfactant into a water-based coating composition. The water-based coating composition containing this emulsified polymer composition is then applied to a substrate and the solvent is evaporated from the polymer composition to produce microcapsules containing discrete droplets of the non-solvent. Subsequent drying of the water-based coating and evaporation of the non-solvent from the microcapsules produces a film having incorporated therein structured, closed-cell, void-containing microcapsules with the voids serving to provide opacity and gloss control to the film. In an alternative to the principal process, microcapsules containing the non-solvent are produced in-situ in the water-based coating composition prior to forming a film therefrom.
REFERENCES:
patent: 3157533 (1964-11-01), Clancy et al.
patent: 3336155 (1967-08-01), Rowe
patent: 3472798 (1969-10-01), Pitchforth et al.
patent: 3554786 (1971-01-01), Lieberman
patent: 3585149 (1971-06-01), Vassiliades et al.
patent: 3661807 (1972-05-01), Seiner
patent: 3669899 (1972-06-01), Vassiliades et al.
patent: 3707514 (1972-12-01), Vassiliades et al.
patent: 3720534 (1973-03-01), Macaulay et al.
patent: 3779941 (1973-12-01), Powell
patent: 3819542 (1974-06-01), Kreider
patent: 3824114 (1974-07-01), Vassiliades et al.
patent: 3844816 (1974-10-01), Vassiliades et al.
patent: 3915726 (1975-10-01), Hansen
Babil Simon
Claar James A.
Temple Rodger G.
Childs Sadie L.
Gwinnell Harry J.
PPG Industries Inc.
Severini Carl T.
Troy Frank J.
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