Solvent for aromatic carboxylic or sulfonic acids
AssigneeSika Technology AG
InventorsMichael Schlumpf, Andreas Kramer, Urs Burckhardt
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Abstract
A method for preparing an acid solution by contacting at least one aromatic carboxylic or sulfonic acid with at least one polyether having blocked hydroxyl groups as a solvent. The polyether having blocked hydroxyl groups is not volatile and exhibits a surprisingly high dissolving capacity for the aromatic carboxylic or sulfonic acid. The acid solution is very compatible in curable compositions and does not cause any emission or odor or migration effects. The acid solution is particularly suitable as a constituent of polyurethane compositions having latent curing agents for accelerating the hydrolysis of the latent reactive groups.
Claims8
A curable composition comprising (i) polymerizable macromolecules, and (ii) an acid solution that is obtained by contacting at least one aromatic carboxylic or sulfonic acid with at least one polyether having blocked hydroxyl groups as solvent so as to dissolve the at least one aromatic carboxylic or sulfonic acid to form an acid solution,
- wherein the blocked hydroxyl groups are selected from the group consisting of ester groups, aceto ester groups, carbonate groups, and urethane groups.
Dependencies are inferred from the claim text.