Abstract: Polyethers are prepared by polymerizing an alkylene oxide in the presence of a starter, an aluminum compound that has at least one hydrocarbyl substituent, and a phosphorus-nitrogen base. The phosphorus-nitrogen base is present in only a small molar ratio relative to the amount of starter. The presence of such small amounts of phosphorus-nitrogen base greatly increases the catalytic activity of the system, compared to the case in which the aluminum compound is used by itself. The product polyethers have low amounts of unsaturated polyether impurities and little or no unwanted high molecular weight fraction. Polymers of propylene oxide have very low proportions of primary hydroxyl groups.

Abstract: Alkoxylations are performed by reacting a cyclic oxide with a starter in the presence of certain phosphonium catalysts. The phosphonium catalysts are highly active and effective in such small quantities that it is often unnecessary to remove catalyst residues from the product. The phosphonium catalysts are very effective in alkoxylating even low molecular weight starters such as glycerol and sorbitol.

Abstract: Polyethers are prepared by polymerizing a cyclic oxide in the presence of a starter and certain phosphonium catalysts. The phosphonium catalysts are highly active and effective in such small quantities that it is often unnecessary to remove catalyst residues from the product. The phosphonium catalysts are very effective in alkoxylating even low molecular weight starters such as glycerol and sorbitol.

Abstract: Alkoxylation reactions are performed in the presence of a phosphonium catalyst having the structure P+(XR1R2R3)A1 wherein R1 is a group having an unsubstituted or inertly substituted aromatic five-member ring having a direct bond between an atom of the aromatic five-member ring and the phosphorus atom, and each R2 is independently a group having an unsubstituted or inertly substituted, optionally heteroatomic, aromatic five- or six-member ring having a direct bond between a carbon atom of the optionally heteroatomic aromatic five- or six-member ring and the phosphorus atom. X is selected from fluorine, chlorine, bromine, iodine, C1-12 perfluoroalkyl, C1-12 alkyl, aryloxy and C1-12 alkoxy, and A is a weakly coordinating anion.

Abstract: Polyethers are prepared by polymerizing an alkylene oxide in the presence of a starter, an aluminum compound that has at least one hydrocarbyl substituent, and a phosphorus-nitrogen base. The phosphorus-nitrogen base is present in only a small molar ratio relative to the amount of starter. The presence of such small amounts of phosphorus-nitrogen base greatly increases the catalytic activity of the system, compared to the case in which the aluminum compound is used by itself. The product polyethers have low amounts of unsaturated polyether impurities and little or no unwanted high molecular weight fraction. Polymers of propylene oxide have very low proportions of primary hydroxyl groups.

Abstract: The present disclosure provides a process. In an embodiment, the process includes melt blending, in the presence of a platinum-group metal catalyst, (i) an olefin-SiH polymer with (ii) a monovinyl graft component having the Structure (1) H2C?CH2—X, wherein X of Structure (1) is a C4-C20 heterohydrocarbyl group with one or more heteroatoms selected from the group consisting of O, N, and Si. The process includes grafting the monovinyl graft component to the olefin-SiH polymer to form a functionalized olefin-Si polymer. The present disclosure also provides the functionalized olefin-Si polymer composition produced from the present process.

Abstract: Polyethers are prepared by polymerizing an alkylene oxide in the presence of a starter, an aluminum compound that has at least one hydrocarbyl substituent, and a phosphorus-nitrogen base. The phosphorus-nitrogen base is present in only a small molar ratio relative to the amount of starter. The presence of such small amounts of phosphorus-nitrogen base greatly increases the catalytic activity of the system, compared to the case in which the aluminum compound is used by itself. The product polyethers have low amounts of unsaturated polyether impurities and little or no unwanted high molecular weight fraction. Polymers of propylene oxide have very low proportions of primary hydroxyl groups.