Primer composition, adhering method, and electric/electronic part

An article comprising a base material, a silicone cured product, and a primer layer adhering the silicone cured product to the base material,

• wherein the primer layer comprises the reaction product of a primer composition comprising:
• (A) an organosiloxane block copolymer represented by the average unit formula:
• (R12SiO2/2)a(R2SiO3/2)b
• wherein each R1 and R2 is independently an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms, “a” is a number in the range of 0.40 to 0.90, “b” is a number in the range of 0.10 to 0.60, and “a+b”=1.00, having 0.5 to 35.0 mol % of silicon atom-bonded hydroxyl groups or silicon atom-bonded alkoxy groups, in addition to being a solid at 25° C. and having a softening point of 200° C. or lower, in which resinous siloxane blocks represented by the formula:
• [R2SiO3/2]
• wherein R2 is the same as above, are connected by linear siloxane blocks represented by the formula:
• —(R12SiO2/2)n—
• wherein R1 is the same as above, and “n” is a number in the range of 10 to 400;
• (B) a curing catalyst, in an amount to promote curing of this composition;
• and
• (C) an organic solvent;
• and
• wherein the silicone cured product comprises the reaction product of a curable silicone composition different from the primer composition.