Iron(III) 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 effective amount of a catalytically active reaction product of a reaction of ingredients i) and ii), where
Ingredient i) is Fe precursor of general formula Fe-A 3 , where the Fe has an oxidation state of 3, and, each A is independently a monovalent organic group; and
Ingredient ii) is a ligand of general formula (xvii), where
General formula (xvii) is
where subscript y is an integer from 0 to 4, subscript z is an integer from 0 to 2, Q 20 is selected from O and S, Q 22 is selected from O and S, Q 21 is selected from N, C, O, and S, A 90 and A 93 are each independently selected from a monovalent organic group and H, A 91 and A 92 are each independently selected from a monovalent organic group, a halogen, and an inorganic group; with the proviso that A 91 optionally combines with another A 91 to form a ring structure; 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 one of conditions (a) to (b) is satisfied, where:
Condition (a) is each A is a carboxylic ester group; or
Condition (b) is each A is 2-ethylhexanoate.
3. The composition of claim 1 , where one of conditions (A) to (E) is satisfied, where:
Condition (A) is the ligand is selected from the group consisting of ligands 142, 143, 161, 164, 165, 168, 169, 170, 171, 172, 173, 174, 175, 177, 178, 179, 187-192, 210, 214, and 215; or
Condition (B) is the ligand is selected from the group consisting of ligands 168-169, 171-175, 177-179, 188-189, and 192; or
Condition (C) is the ligand is selected from the group consisting of ligands 178-179, and 210; or
Condition (D) is the ligand is selected from the group consisting of ligands 172-174, 178-179, 188, 189, and 210; or
Condition (E) is the ligand is selected from the group consisting of ligand numbers 168-171, 175, 177, 190, 191, and 214-215; and
where the ligands are numbered as follows:
4. The composition of claim 1 , where one of conditions (I) to (III) is satisfied, where
Condition (I) is that each A is a carboxylic ester group, and the ligand is one of 142, 143, 161, 164, 165, 168, 169, 170, 171, 172, 173, 174, 175, 177, 178, 179, 187, 188, 189, 190, 191, 192, 210, 214, or 215; or
Condition (II) is that each A is an alkoxy group, and the ligand is one of 178, 179, or 210; or
Condition (III) is that each A is an iso-propoxy group, and the ligand is one of 178, 179, or 210.
5. 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.
6. The composition of claim 1 , where condensation reaction of the composition produces a reaction product having a visual viscosity value ranging from 1000 centiStoke to a solid at room temperature when tested according to a method in which the composition is placed in a humidity chamber at 30° C. and 95% relative humidity for 48 hours.