Polymerization process using di-t-butyl diperoxycarbonate as a f

Details Polymerization process using di-t-butyl diperoxycarbonate as a f Polymerization process using di-t-butyl diperoxycarbonate as a f

1977-01-06

1978-11-14

Lilling, Herbert J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526228, 526346, C08F 200, C08F 434, C08F 438, C08F11208

Patent

active

041256964

ABSTRACT:
A process for the free-radical polymerization of a vinyl monomer, including vinyl aromatic monomer, at least two distinct, progressively higher polymerization temperatures, each between the temperatures of from about 50.degree. C and 130.degree. C, in the presence of at least two free-radical initiators, one of which, used in relatively minor proportions, is di-t-butyl diperoxycarbonate and the other, used in relatively major proportions, has a ten hour half-life temperature below 90.degree. C. The distinct temperatures for polymerization may occur as separate parts of a polymerization in which the temperature of the system continually increases.

REFERENCES:
patent: 3534009 (1970-10-01), Beresniewicz
patent: 3743630 (1973-07-01), Wood
"Organic Perioxides", Swern Ed. vol. 1, pp. 81-86, Wiley Intersci.
"Polymer Handbook", Brandrup et al.; II-1 to II-5S, Decomposition Rates of Organic Free Due Radical Initiators.

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