Primer for silicone rubber

A priming agent composition comprises 100 (weight) parts of an organopolysiloxane, 5-500 parts of organosilicon compounds having at least one hydrolyzable group, 5-500 parts filler comprising reinforcing filler and/or hydrolysis condensates of at least one organosilicon compound, and an organic solvent. A priming agent composition (I) comprises: (a) 100 (weight) parts of an organopolysiloxane comprising units of formula (I); (b) 5-500 parts of organosilicon compounds having at least one hydrolyzable group of formula (II) or (III); (c) 5-500 parts of filler comprising reinforcing filler and/or hydrolysis condensates of at least one organosilicon compound (B) having at least two X groups per molecule; (d) 10-2000 parts of solvent comprising an organic solvent and/or a low molecular weight cyclic or linear polyorganosilicon compound; (e) 0-80 parts of crosslinking agents comprising dialkyl peroxide, diaryl peroxide, alkylaryl peroxide, aralkyl peroxide and/or hydroperoxide; (f) 0-50 parts of condensation catalysts; and (g) 0-50 parts of inactive filler, pigments, coloring agents, thermal stabilizers, alkynols, benzotriazoles, triazoles, fibers and polymer powder. RaR1>bSiO(4-a-b)/2 (I) R2>cR3>dSi(X)e (II) (X)e'R2>c'R3>d'Si-R4>-SiR2>c'R3>d'Si(X)e' (III) R : OH or optionally halogenated or O-, N-, S- or P-atom containing 1-20 C hydrocarbon that is free from aliphatically unsaturated groups; R1>aliphatically unsaturated, optionally halogenated or O- or N-atom containing 1-10C hydrocarbon; a, b : 0-3; a+b = 3 and each molecule contains at least 4 R1> groups; R2>optionally halogenated 1-20C hydrocarbon; R3>alkenyl or Y-R4>; X : -OR2>, -NR2>2, R2>-C(=O)-N(R2>)- or -O-N=CR2>2; Y : monovalent anhydride, aminoalkoxy, acryloxy, methacryloxy, N-aminoalkylamino, sulfone, sulfonate, phosphate, phosphonate, amino, N-alkylamino, epoxy or mercapto; R4>divalent, optionally O-containing 1-20C hydrocarbon; c, d : 0-3; e : 1-4; c+d+e : 4 c', d' : 0-2; e' : 1-3; and c'+d'+e' : 3. Independent claims are included for: (1) a process for the production of the composition (I) by mixing components (a), (b), (c) and (d) and optionally (e), (f) and (g); (2) a process to improve the adhesion of silicon rubber to a substrate by application of the composition (I) onto the substrate, drying or crosslinking to formed a primed substrate followed by application of a crosslinkable silicon rubber composition on to the primed substrate to form a laminate and hardening of the laminate to form an ad