Abstract:
A polymeric peroxide comprising a divalent recurring unit having the formula: wherein the recurring unit of Formula I has a 10 hour half-life temperature of at least 80 °C and optionally a divalent recurring unit having the formula: wherein R 1 , R 2 , R 3 , R 5 , X, X 1 , Y, Z, y and z are as defined in the Detailed Description of the Preferred Embodiments and the polymeric peroxide has a molecular weight of 1,000 to 200,000. The polymeric peroxides are derived from hydroxy-hydroperoxides or dihydroxy dialkyl peroxides. These polymeric peroxides can be used for preparing block copolymers and compatibilizing polymer blends and alloys.
Abstract:
The present invention relates to a novel antioxidant-peroxide compound of Structure A, in which the definitions of X, Y, R, An, x, and y are given in the Summary of the Invention section, for example, t-butyl peroxy-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, processes for producing polymeric compositions of enhanced oxidative stability via initiation of polymerization of ethylenically unsaturated monomers, curing of elastomers and unsaturated polyester resins, modification of polypropylene and other polymers and copolymers, and crosslinking of olefin polymers and copolymers, and the resulting polymers having enhanced oxidative stability.