Description: 526 synthetic resins or natural rubbers -- part of the class 520 series / 526 synthetic resins or natural rubbers -- part of the class 520 series/() synthetic resins (class 520, subclass 1) (72) polymers from only ethylenic monomers or processes of polymerizing, polymerizable compositions containing only ethylenic monomers as reactants or processes of preparing (89) polymerizing in the presence of a specified material other than monomer (90) material contains transition metal or compound thereof (95) material contains transition metal oxide (other than peroxide) (102) contains non-transition heavy metal or compound thereof
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