Loading patent…
AssigneeThe Commonwealth of Australia Commonwealth Scientific and Industrial Research Organisation
InventorsEzio Rizzardo, Gordon Francis Meijs, San Hoa Thang
Estimating the term…
A process for the production of lower molecular weight polymers by free radical polymerization, characterized in that there is added to the polymerization system a compound of the general formula I ##STR1## wherein R.sup.1 is hydrogen, chlorine, an alkyl group, or a group capable of activating the vinylic carbon towards free radical addition; R.sup.2 is hydrogen or an optionally substituted alkyl, alkenyl, aryl, cycloalkenyl or cycloalkyl group or the group --COZ, where Z is R.sup.3 or OR.sup.3, where R.sup.3 is hydrogen or an optionally substituted alkyl, alkenyl or aryl group. X is a hydrogen atom, an alkyl or aryl group, or a halogen, and the two X groups may be the same or different. The invention also includes polymers or oligomers made by the process and novel compounds of the general formula I as defined above.
A process for the production of lower molecular weight polymers by free radical polymerization, characterized in that there is added to the polymerization system a compound of the general formula I ##STR4## wherein R.sup.1 is hydrogen, chlorine, an alkyl group, or a group capable of activating the vinylic carbon towards free radical addition;
A compound of the general formula I ##STR5## wherein R.sup.1 is a group capable of activating the vinylic carbon towards free radical addition;
.alpha.-(t-butylperoxymethyl)styrene, .alpha.-(t-butylperoxymethyl)acrylonitrile, methyl .alpha.-(t-butylperoxymethyl)acrylate, ethyl .alpha.-(t-butylperoxymethyl)acrylate, or .alpha.-(cumeneperoxymethyl)styrene.
A process for the production of lower molecular weight polymers by free radical polymerization, wherein a compound selected from the group consisting of
A compound of the general formula (I):
Dependencies are inferred from the claim text.