Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in reactor of specified material – or in reactor...
Patent
1979-11-07
1982-03-16
Henderson, C. A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymerizing in reactor of specified material, or in reactor...
526202, 526225, 560 55, 568 33, 568707, 568727, 562468, C08F 220, C08F 224, C08F 202
Patent
active
043202152
ABSTRACT:
A method of preventing scale formation and adhesion onto the surfaces of a polymerization vessel and auxilliary equipment used in polymerization of vinyl chloride monomer, wherein the surfaces are coated prior to polymerization with a coating agent having the concurrent properties of (a) one or more functional groups having the ability to chelate, (b) one or more functional groups having the ability to inhibit action of free radicals, and (c) substantial insolubility to vinyl chloride monomer and insoluble to water. The concurrent presences of these functional characteristics syngergistically act to prevent scale adhesion onto the surfaces after substantial numbers of repeated polymerization charges.
REFERENCES:
patent: 3825434 (1974-07-01), Berens
patent: 4076951 (1978-02-01), Katayvma
patent: 4093787 (1978-06-01), Burgess
Osawa Tadashi
Yonezawa Kazuya
Henderson C. A.
Kanegafuchi Kagaku Kogyo & Kabushiki Kaisha
Kojima Moonray
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