Water soluble complexing agent for metallic cations
AssigneeCoatex
InventorsJacky Rousset, Georges Ravet
Life of this patent
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Abstract
A water-soluble complexing agent of metallic cations having a high complexing power and a high threshhold effect, constituted from acrylic copolymers, characterized by the fact that said agent is formed by terpolymers comprising acrylic and methacrylic and itaconic units of the general formula: ##STR1## in which the indices, expressed in percent by weight have at least a value of 10 for x and y, and a value of 5 for z.
Claims14
A water-soluble complexing agent for metallic cations with a high complexing power and a high threshold effect, comprising:
- a terpolymer comprised of from 20 to 60% by weight acrylic acid units, from 20 to 60% by weight methacrylic acid units and from 5 to 40% by weight itaconic acid units, the acrylic acid units methacrylic acid units and itaconic acid units having the formulas:
- ##STR5##
A water-soluble complexing agent for metallic cations with a high complexing power and a high threshold effect, comprising:
- a terpolymer comprised of from 30 to 50% by wt. acrylic acid units, from 30 to 50% by wt. methacrylic acid and from 10 to 30% by wt. itaconic acid.
Dependencies are inferred from the claim text.