PLASTICIZER FREE CAULK AND SEALANTS HAVING IMPROVED AGED WET ADHESION

摘要

The present invention provides filled aqueous caulk and sealant compositions made from high solids aqueous binders chosen from copolymers having a mixture of backbone acid and hydroxyl groups that are copolymerized from 0.5 to 7.5 wt.%, based on total monomer weight, of an hydroxyl group containing monomer, and mixed backbone acid copolymers that are copolymerized from methacrylic acid (MAA) with a second acid monomer having a lower pKa than the pKa of MAA. Preferred, compositions comprise one or more organosilane exhibit the adhesion and joint movement capability required by ASTM C-920-08, as well as good weatherability and aged wet adhesion to glass, even at a filler to binder ratio of 0.2:1 to 4:1.