Method for making heterophasic polymer compositions

A method for producing a polymer composition, the method comprising the steps of:

• (a) providing a compatibilizing agent, the compatibilizing agent comprising two or more functional groups capable of reacting with a free radical in a radical addition reaction, wherein the compatibilizing agent is a compound conforming to the structure of Formula (EX)
• wherein R301, R302, R303, and R304 are independently selected from the group consisting of hydrogen, halogens, alkyl groups, substituted alkyl groups, aryl groups, substituted aryl groups, heteroaryl groups, and substituted heteroaryl groups;
• R311 and R312 are individual substituents independently selected from the group consisting of hydrogen, alkyl groups, substituted alkyl groups, alkenyl groups, substituted alkenyl groups, amine groups, substituted amine groups, aryl groups, substituted aryl groups, heteroaryl groups, and substituted heteroaryl groups or R311 and R312 together form a single substituent selected from the group consisting of aryl groups, substituted aryl groups, heteroaryl groups, and substituted heteroaryl groups;
• (b) providing a heterophasic polymer composition, the heterophasic polymer composition comprising a propylene polymer phase and an ethylene polymer phase;
• (c) providing a second polymer composition, the second polymer composition comprising recycled polymer;
• (d) mixing the compatibilizing agent, the heterophasic polymer composition, and the second polymer composition;
• and
• (e) generating free radicals in the propylene polymer phase and the ethylene polymer phase of the heterophasic polymer composition and in the polymer of the second polymer composition, whereby at least a portion of the compatibilizing agent reacts with the free radicals.