| 主权项 |
1. A composition comprising ingredients (A) and (B): where Ingredient (A) is a catalytically effective amount of a reaction product of a Zn precursor and a ligand, where the Zn precursor is distinct from a reaction product of the Zn precursor and the ligand, and where the ligand is selected from the group consisting of Ligands (a), (b), (c), and (d), whereLigand (a) has general formula (ii)where a bond with ‘Rn’ in the formula represents a covalent single bond or an aromatic bond forming part of a ring structure, Q1 is a heteroatom selected from O and S, each A2 and each A3 is independently selected from a hydrogen atom and a monovalent hydrocarbon group, each of A5 and A6 is independently selected from a hydrogen atom and a monovalent organic group, with the proviso that A5 and A6 may be bonded together to form a ring structure, each of A4 and A7 is independently selected from nothing, a hydrogen atom, and a monovalent organic group, A1 is either a monovalent hydrocarbon group or a divalent linking group, with the proviso that when A1 is a divalent linking group, then A1 links the structure of general formula (ii) with a structure of formula (iii):where * denotes a point of attachment, and Q1, A2, A3, A4, A5, A6, and A7 are as defined above;Ligand (b) isLigand (c) isandLigand (d) isandIngredient (B) is a silicon containing base polymer having an average, per molecule, of one or more hydrolyzable substituents, andIngredient (A) is capable of catalyzing a condensation reaction of the hydrolyzable substituents on ingredient (B). |
