Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in reactor of specified material – or in reactor...
Patent
1976-03-16
1978-07-04
Holler, Alan
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymerizing in reactor of specified material, or in reactor...
526 74, 526344, 528484, C08F 202, C08F 1406
Patent
active
040989720
ABSTRACT:
Vinyl chloride monomers or a monomeric mixture composed mainly of vinyl chloride is bulk-polymerized in a polymerization vessel. The inner walls and other surfaces of said vessel, coming into contact with the monomer or monomers, are coated with one or more specifically selected inorganic or organic compounds having a solubility greater than 0.5 g in 100 g of water at 25.degree. C and a boiling point higher than 60.degree. C. This bulk polymerization method serves to greatly reduce the deposition of polymer scale on the vessel walls and other surfaces. In addition the polymer scale deposited can be readily separated and removed by merely washing with water or gas under pressure. The present method provides high quality polymers.
REFERENCES:
patent: 3515709 (1970-06-01), Nelson et al.
patent: 3778423 (1973-12-01), Reiter
patent: 3926910 (1975-12-01), Mowdood
patent: 4016341 (1977-04-01), Ogawa et al.
patent: 4024330 (1977-05-01), Morningstar et al.
Eguchi Yoshitugu
Kurimoto Kazuhiko
Kuwata Satoshi
Ogawa Kinya
Holler Alan
Shin-Etsu Chemical Co. , Ltd.
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