Titanium containing complex and condensation reaction catalysts, methods for preparing the catalysts, and compositions containing the catalysts
View Patent ↗A composition is capable of curing via condensation reaction. The composition uses a new condensation reaction catalyst. The new condensation reaction catalyst is used to replace conventional tin catalysts. The composition can react to form a gum, gel, rubber, or resin.
1. A composition comprising:
(A) a catalytically active reaction product of a reaction of ingredients i) and ii), where
ingredient i) is a Ti precursor of formula Ti-A 4 , where each A independently represents a monovalent organic group; and
ingredient ii) is one of ligands [12], [59], [83], [84], [102], and [105], below:
[102] a ligand of general formula (xvii):
where A 57 and A 58 are each bonded to P through a single bond or a double bond, A 57 and A 58 are each independently selected from OH, O, and a monovalent organic group, A 59 is a monovalent organic group, and subscript e is an integer from 0 to 4; or
[105] a ligand of general formula (xx)
where subscript h is a in integer from 0 to 5, and each A 64 is independently selected from a halogen atom, OH, and a monovalent organic group; and
(B) a silicon containing base polymer having an average, per molecule, of one or more hydrolyzable substituents.
2. The composition of claim 1 , where
each A is an alkoxy group.
3. The composition of claim 1 , further comprising at least one additional ingredient distinct from ingredients (A) and (B), where the at least one additional ingredient is selected from the group consisting of: (C) a crosslinker; (D) a drying agent; (E) an extender, a plasticizer, or a combination thereof; (F) a filler; (G) a treating agent; (H) a biocide; (J) a flame retardant; (K) a surface modifier; (L) a chain lengthener; (M) an endblocker; (N) a nonreactive binder; (O) an anti-aging additive; (P) a water release agent; (Q) a pigment; (R) a rheological additive; (S) a vehicle; (T) a tackifying agent; (U) a corrosion inhibitor; and a combination thereof.
4. A method comprising: exposing the composition of claim 1 to moisture to prepare a reaction product.
5. The reaction product prepared by the method of claim 4 .
6. The composition claim 1 , where the ligand is selected from the group consisting of ligands 12, 83, and 84, and the composition is clear and colorless.
7. The reaction product of claim 5 , where the ligand used to prepare ingredient (A) in the composition used to prepare the reaction product is selected from the group consisting of ligands 12, 83, and 84, and the reaction product is clear and colorless.
8. The composition of claim 1 , where each A is an ethoxy group.
9. The composition of claim 1 , where each A is an aralkyl group.
10. The composition of claim 1 , where each A is a benzyl group.
11. The composition of claim 1 , where ingredient (A) is present in an amount ranging from 1 part per million to 5%, based on total weight of all ingredients in the composition.