Abstract:
Isocyanate-terminated prepolymers can be cured with di- and triamino-s-triazines of formula ##STR1## where R is ##STR2## --S--R.sub.5 ; --O--R.sub.6 or ##STR3## where at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is hydrogen; R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are hydrogen or an optionally substituted aromatic or aliphatic group andR' is the divalent residue of an organic diamine, the residue of an organic diisocyanate, or the residue of an organic diepoxide.
Abstract:
A method for priming a high solids enamel automotive finish to improve the adhesion thereto of a sealant composition, which method comprises treating said surface with a strong acid, conveniently by applying a primer composition to said surface, said primer composition comprising a solution, in a volatile organic solvent, of a hydroxy functional film forming resin and at least 0.25 percent of a strong acid, by weight of said resin.
Abstract:
What are disclosed are a poly(meth)acrylate polymer having pendant hydrolyzable alkoxysilane groups thereon prepared by reacting a poly(meth)acrylate polymer having pendant hydroxy groups thereon with an isocyanato functional alkoxysilane having 1 to 3 hydrolyzable lower alkoxy groups present on the silicon atom thereof; a substrate such as glass or aluminum having a tenacious coating thereon of such a polymer alone or in admixture with another, different, resinous binder component; such a substrate further having a resinous sealant composition applied over said tenacious coating as a primer; and methods for making such a polymer and such coated substrates.
Abstract:
What are disclosed are a poly(meth)acrylate polymer having pendant hydrolyzable alkoxysilane groups thereon prepared by reacting a poly(meth)acrylate polymer having pendant hydroxy groups thereon with an isocyanato functional alkoxysilane having 1 to 3 hydrolyzable lower alkoxy groups present on the silicon atom thereof; a substrate such as glass or aluminum having a tenacious coating thereon of such a polymer alone or in admixture with another, different, resinous binder component; such a substrate further having a resinous sealant composition applied over said tenacious coating as a primer; and methods for making such a polymer and such coated substrates.