Curable polyolefin compositions containing organosilicon compounds as adhesion additives

A polyolefin composition exhibiting improved adhesion, said composition comprising

• (A) a polyolefin comprising repeating units derived from at least one olefin wherein each molecule of said polyolefin contains at least two ethylenically unsaturated groups capable of reacting to cure said polyolefin;
• and
• (B) an effective amount of an adhesion promoter for said polyolefin;
• wherein said adhesion promoter is a reaction product of ingredients comprising
• (B1) at least one organic compound containing at least one carbinol group and at least one ethylenically unsaturated group capable of reacting during curing of said polyolefin;
• and
• (B2) at least one organosilicon compound selected from the group consisting of silanes and bis-silylalkanes;
• and wherein said compound B2 contains at least three moisture-reactive groups and constitutes from 10 to 90 percent of the total weight of said ingredients.