Coating processes – Particles – flakes – or granules coated or encapsulated – Solid encapsulation process utilizing an emulsion or...
Patent
1978-08-08
1980-12-23
Smith, John D.
Coating processes
Particles, flakes, or granules coated or encapsulated
Solid encapsulation process utilizing an emulsion or...
106308B, 260 4214, 260 4215, 427214, 427215, 427255, 427301, 427302, 526 97, 526129, 526156, 526901, 4273855, 4273897, 4273898, 4272481, B05D 724
Patent
active
042411122
ABSTRACT:
According to the invention, the method for applying a polymer coating onto the surface of a solid filler comprises deposition of a complex organometallic catalyst, containing a compound of a transition metal and an organic compound of a metal of the second or third groups of the periodic system, on the surface of the solid filler and liquid- or gas-phase polymerization of olefins at a temperature of 50.degree. to 170.degree. C. and a pressure of 1 to 60 atm on said catalyst deposited on the surface of the solid filler. The deposition is carried out in two stages. The first stage is gas-phase deposition of the first component of the catalyst, i.e. a compound of a transition metal, on the surface of the solid filler. The second stage is gas- or liquid-phase deposition of the second component of the catalyst, i.e. an organic compound of a metal of the second or third group of the periodic system. Polymer coatings produced by this method are marked by a high quality and uniformity, as well as good adhesion to the surface of the solid filler. The coating density is 0.7 to 0.95 g/cm.sup.3. The thickness of such coatings can be varied within a broad range from a minimum of 7.multidot.10.sup.-3 g/m.sup.2. The method according to the invention permits a considerable reduction in the consumption of the initial monomers and the catalyst; for example, the catalyst consumption can be reduced to a value as low as 0.001 to 0.1 percent of the weight of the filler on conversion to vanadium tetrachloride. The method is quite simple technologically.
REFERENCES:
patent: 3168484 (1965-02-01), Engel et al.
patent: 3790550 (1974-02-01), Miller
patent: 3925338 (1975-12-01), Ort
patent: 4035560 (1977-07-01), Caumartin et al.
patent: 4076922 (1978-02-01), Satoh et al.
Akopian Leonid A.
Brikenshtein Khaim-Mordkhe A.
Dyachkovsky Fridrikh S.
Enikolopov Nikolai S.
Gavrilov Jury A.
Page Thurman K.
Smith John D.
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