Manufacturing method for sulfonic acid group-containing ether compound

摘要

The present invention provides a method for efficiently producing a sulfonic acid group-containing ether compound having a high purity and a good polymerizability while preventing production of a byproduct, and provides a sulfonic acid group-containing ether compound containing fewer impurities and having a good radical (co)polymerizability.;The present invention provides a method of producing a sulfonic acid group-containing ether compound by reacting a sulfurous acid compound with a compound represented by the formula (1):;wherein R1 represents a single bond, a CH2 group, or a CH2CH2 group, and R2 represents H, or a CH3 group,the method comprising the steps of:adjusting pH of a reaction system to 5.5 or greater with use of an alkaline substance; andadding the compound represented by the formula (1) to a reaction vessel containing the sulfurous acid compound.

主权项

1. A composition comprising sulfonic acid group-containing ether compound of formula (2),
wherein the composition has pH of 10 or greater, and the composition comprises, with respect to 100 mol % of the compound of formula (2), less than 10 mol % of a of formula (3): wherein R1 represents a single bond, a CH2 group, or a CH2CH2 group, R2 represents H, or a CH3 group, X and Y may be the same as or different from each other and each represent a hydroxy group or a sulfonic acid (salt) group, and at least one of X and Y is a sulfonic acid (salt) group.