Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in reactor of specified material – or in reactor...
Patent
1978-01-23
1979-11-06
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, C08F 202, C08F 218, C08F 222
Patent
active
041736966
ABSTRACT:
A novel and improved method for polymerizing a vinyl monomer in a polymerization reactor is provided. The inner walls of the polymerization reactor and other surfaces coming into contact with the monomer are coated with an aqueous liquid containing at least one alkali metal or ammonium salt of an anionic dye of the sulfonic carboxylic acid form and having a pH value adjusted not to exceed 7 by aid of a pH adjusting agent, and the thus coated surfaces are dried with heat before the polymerization is conducted. The method serves to greatly reduce the deposition of polymer scale on those surfaces and, consequently, improve the productivity as well as the quality of polymer product.
REFERENCES:
patent: 4068059 (1978-01-01), Witenhafer et al.
Hasegawa Niichiro
Kaneko Ichiro
Katusima Sensaku
Koyanagi Shunichi
Shimizu Toshihide
Holler Alan
Shin-Etsu Chemical Co. , Ltd.
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