Polymerization of ethylenically unsaturated monomers employing alpha-halo substituted diacyl peroxides
AssigneeArgus Chemical Corporation
InventorDonald W. Wood
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Abstract
Asymmetrical organic diacyl peroxide polymerization initiators having enhanced initiator efficiency and characterized by the presence of an acyclic acyl group of four or more carbon atoms having bromo or halo substitution at the alpha carbon atom, the other acyl group being different and heterosubstituted. However, when the alpha-halosubstituted acyl group is branched chain the other acyl group may be hydrocarbon.
Claims12
A method for initiating the polymerization of a polymerizable monomer containing ethylenic unsaturation comprising subjecting said monomer to polymerization conditions in the presence of a catalytic amount of an organic peroxide of the formula:
- ##STR5## wherein X is hydrogen, chlorine, or bromine, at least one X being chlorine or bromine;
- R.sup.1 is saturated aliphatic hydrocarbon of from two to 19 carbon atoms, having from zero to five branches along the chain;
- and
- R is an organic radical of from one to 19 carbon atoms and composed solely of carbon, hydrogen, oxygen and halogen of atomic number nine to 35, with the proviso that R has at least one atom of oxygen or halogen, when R.sup.1 is straight chain.
A method for initiating the polymerization of a polymerizable monomer containing ethylenic unsaturation comprising subjecting said monomer to polymerization conditions in the presence of a catalytic amount of an organic peroxide of the formula:
- ##STR6## wherein X.sup.1 is chlorine or bromine;
- n is an integer of from 1 to 9;
- R.sup.2 is an organic radical having other than alpha-halo substitution and of from two to 11 carbon atoms having from one to three heteroatoms which are oxy or halogen or atomic number nine to 35.
A method for initiating the polymerization of a polymerizable monomer containing ethylenic unsaturation comprising subjecting said monomer to polymerization conditions in the presence of a catalytic amount of an organic peroxide of the formula:
- ##STR7## wherein X.sup.2 is chlorine or bromine;
- n.sup.2 is an integer of from 1 to 6;
- Y is hydrogen or alkyl, at least one Y being alkyl, and
- R.sup.3 is an organic radical composed solely of carbon, hydrogen, and the heteroatoms oxygen and halogen of atomic number nine to 35, three being not more than three heteroatoms.
Dependencies are inferred from the claim text.