Abstract D R A W I N G New tertiary-aliphatic alpha-(peracyl)azo compounds represented by the formula PROCESSES FOR PREPARING I where R is and n is 1 or and n is 2 by reacting a t-aliphatic Alpha -chloroazo compound with peracids or their salts selected from with the corresponding acylating agent; and the use of these compounds as polymerization initiators for vinyl monomers and as curing agents for resins. For example, 2-t-butylazo-2(acetylperoxy)-4-methylpentane is prepared by reacting the sodium salt of 2-t-butylazo-2-hydroperoxy-4-methylpentane with acetyl chloride; and the product used to polymerize vinyl chloride at 30*C. and to cure unsaturated polyester-styrene resins at room temperature. processes for preparing compounds I by reacting t-aliphatic azo compounds of the formula
IN A PROCESS FOR THE HOMO- OR COPOLYMERIZATION OF ETHYLENICALLY UNSATURATED MONOMERS WHICH ARE RESPONSIVE AT SUITABLE TEMPERATURES TO FREE RADICAL GENERATORS AS POLYMERIZATION INITIATORS, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS FREE RADICAL GENERATOR T-ALIPHATIC A-(PERACYL)AZO COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
40 words
IN A PROCESS FOR THE HOMO- OR COPOLYMERIZATION OF ETHYLENICALLY UNSATURATED MONOMERS WHICH ARE RESPONSIVE AT SUITABLE TEMPERATURES TO FREE RADICAL GENERATORS AS POLYMERIZATION INITIATORS, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS FREE RADICAL GENERATOR T-ALIPHATIC A-(PERACYL)AZO COMPOUNDS OF THE FORMULA
Claim 3
Dependent Claim
33 words
In a process for curing an unsaturated polyester resin composition in the presence of a free radical initiator, the improvement which comprises employing as said initiator t-aliphatic Alpha -(peracyl)azo compounds of the formula
Claim 4
Dependent Claim
33 words
In a process for curing an unsaturated polyester resin composition in the presence of a free radical initiator, the improvement which comprises employing as said initiator t-aliphatic Alpha -(peracyl)azo compounds of the formula
Claim 5
Dependent Claim
20 words
Claim 1 wherein the monomer is vinyl chloride and the polymerization temperature is in the range of -10* to +60*C.
Claim 6
Dependent Claim
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claim 3 wherein the generator is 2-t-butylazo-2-(acetylperoxy)-4-methylpentane.
Claim 7
Dependent Claim
34 words
claim 2 wherein said composition comprises (a) the esterification product of propylene glycol, maleic anhydride and phthalic anhydride in admixture with (b) monomeric styrene, and the curing temperature is in the range of 20*-90*C.
Claim 8
Dependent Claim
8 words
claim 5 wherein the initiator is 1-t-butylazo-1-(benzoylperoxy) cyclohexane.