| abstract |
An object of the present invention is to provide an adhesion-imparting agent that exhibits excellent adhesion when used for a curable resin composition, and a curable resin composition containing the adhesion-imparting agent. The adhesion-imparting agent of the present invention is an organopolysiloxane represented by the following average unit formula (1), (R 11 R 12 SiO 2/2 ) a (R 2 SiO 3/2 ) b (R 3 SiO 3 / 2 ) c (R 4 O 1/2 ) d . ． ． (1)n n n (In the average unit formula (1), R 11 and R 12 each independently represent an aryl group having 6 to 20 carbons or an alkyl group having 1 to 20 carbons, R 2 represents an alkenyl group, and R 3 represents a group containing an epoxy group. Or an oxetanyl-containing group, R 4 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms. A, b, c, and d are all positive numbers, and satisfy 0.80 a + b + c + d 1.00, c / (a + b + c)> 0.01, d / (a + b + c)> 0.02 and d / (2a + b + c + d) <0.05). |