| http://www.w3.org/ns/prov#value | - A preferred dispersing agent for the fine particle size filler contains a mixture of compounds comprising a phosphorus oxyacid having the formula: ##STR2## wherein R1 is an organic group containing a terminal chain which is either a hydrocarbon group having at least six carbon atoms or a polyether or polyester of molecular weight greater than 200 preferably from 500-10,000, R2 is either a group as
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