| http://www.w3.org/ns/prov#value | - e of claim 2 wherein the reinforcement promoter has the structure: ##STR21## wherein R1 is an organic group free of olefinic or acetylenic unsaturation having a valence of n; R2, and R3 and R4 are hydrogen, carboxy, or monovalent organic groups free of olefinic or acetylenic unsaturation; X is: ##STR22## m has a value of 0 or 1; and n has a value of at least two. 5.
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