Primer composition containing epoxy phosphate esters, silane coupling agent, reactive end group-terminated polydiorganosiloxane, organometallic catalysts and amine hardening agents

Claim 1

A primer composition comprising a diluent and a film-forming binder composition; said binder composition comprising an organometallic siloxane condensation catalyst, an amine hardner, a silane coupling agent, and a reaction product of: (1) a reactive endgroup-functional polydiorganosiloxane represented by the general formula: ##STR7## wherein n is an integer equal to 0 to 2,000 inclusive; X is selected from the group consisting of halogen, hydrogen, --OH, --OOCR 3 , --OR 3 , --O--N=R 3 , --N(R 3 ) 2 and --SR 3 ; R 1 is selected from the group consisting of C.sub.(1-3) monovalent hydrocarbon radicals, substituted derivatives thereof which are free of olefinic unsaturation, and C.sub.(2-10) olefinically unsaturated aliphatic radicals; R 2 is selected from the group consisting of C.sub.(1-18) hydrocarbon radicals and substituted derivatives thereof; and R 3 is selected from the group consisting of a hydrocarbon radical and a substituted hydrocarbon radical; and (2) a phosphate ester containing terminal epoxide functionality corresponding to the general formula: ##STR8## wherein R' is a glycidyl ether of the general formula: ##STR9## wherein m is a positive number between 0 and about 20 and equals the number of repeating units in said ether; R is an aromatic group or a remnant of a compound which contains an aromatic group; R" is H or an organic group of up to about 20 carbons; and R'" is selected from a group consisting of R' and R".