Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1977-04-18
1979-01-23
Henderson, C. A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526 88, 526204, 526221, 526236, C08F 220, C08F11406
Patent
active
041362420
ABSTRACT:
A polymerization vessel equipped with a condenser is charged with vinyl chloride, a suspending agent or dispersing agent, and water. The mixture is subjected to a preparatory stirring in the absence of a catalyst. The polymerization catalyst is added thereto when bubbling caused by the preparatory stirring subsides and stable suspended oil drops form. Blockage of the condenser by polymer scale deposition is substantially reduced. The addition of an alkaline substance, an oxidizing substance or an azine dye further reduces polymer scale deposition. Preferably the operation of the condenser is initiated only after the conversion rate is higher than 5% or the average value per unit hour.
REFERENCES:
patent: 3340243 (1967-09-01), Beer
patent: 3541061 (1970-11-01), Heiberger
patent: 3562238 (1971-05-01), Parks
patent: 3577401 (1971-05-01), Smith
patent: 3627744 (1971-12-01), Hopkins
patent: 3926931 (1975-12-01), Koyanagi
Kiri Yoshitaka
Koyanagi Shunichi
Kurimoto Kazuhiko
Tajima Shigenobu
Henderson C. A.
Shinetsu Chemical Company
LandOfFree
Method for suspension-polymerizing vinyl chloride does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for suspension-polymerizing vinyl chloride, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for suspension-polymerizing vinyl chloride will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2273846