Blended latex binder for exterior paints with wet primed...

Details Blended latex binder for exterior paints with wet primed... Blended latex binder for exterior paints with wet primed...

C - Chemistry, Metallurgy

08

L

117/201, 400/650

C08L 27/06 (2006.01) C08L 31/04 (2006.01) C08L 35/00 (2006.01) C09D 3/74 (1980.01)

Patent

CA 1064636

Abstract of the Disclosure A water-based paint confers wet primed adhesion if its binder is a latex whose polymer is a vinyl chloride/ acrylic or an all-acrylic containing polymerized therein (based on weight of main monomers) not only 0.3-5% of (meth) acrylic acid but also a fraction of hydroxymethyl diacetone acrylamide (HMDAA)* which must be at least 1% in case of vinyl chloride/acrylics and at least 2% in case of all-acrylics. But, surprisingly, when such a latex is diluted by blending with a vinyl acetate/acrylic latex which by itself does not confer wet primed adhesion, superior wet primed adhesion is obtainable even when the overall level of HMDAA is only 0.65% when the HMDAA latex is an al??acrylic and only 0.40% when the HMDAA latex is a vinyl chloride/acrylic. * Trademark

232881

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