摘要:
Embodiments relate to a method of producing a modified double metal cyanide complex, a method of producing a monol or polyol that includes providing the modified double metal cyanide complex, an alkylene oxide polymerization process that includes providing the modified double metal cyanide complex, a batch, semi-batch, or continuous manufacturing process that includes providing the modified double metal cyanide complex, and a polyether polyol prepared using the batch, semi-batch, or continuous manufacturing process that includes providing the modified double metal cyanide complex.
摘要:
The present invention concerns a catalyst formulation comprising: (a) a Zn catalyst comprising a Zn compound having alcoholate ligand(s) derived from one or more polyols, and (b) a catalyst additive comprising a metal compound (i) having alcoholate ligand(s) derived from one or monohydric alcohol wherein the metal is selected from: (I) first row transition metals excluding Zn, preferably Sc, Ti, V, Cr, Mn, Ni, and Co, more preferably Ti, (II) second row transition metals, preferably Y and Zr, more preferably Zr, and (III) combinations of at least two metals selected from (I) and (II). The present invention also relates to a process for polymerizing an epoxide monomer, preferably ethylene oxide, comprising carrying out the process in the presence of the catalyst formulation.
摘要:
The present invention concerns a catalyst formulation comprising: (a) a Zn catalyst comprising a Zn compound having alcoholate ligand(s) derived from one or more polyols, and (b) a catalyst additive comprising a metal compound (i) having alcoholate ligand(s) derived from one or monohydric alcohol wherein the metal is selected from: (I) group 2 metals, preferably Mg, Ca, Sr, and Ba, more preferably Mg, (II) Li, and (III) combinations of at least two metals selected from (I) and (II). The present invention also relates to a process for polymerizing an epoxide monomer, preferably ethylene oxide, comprising carrying out the process in the presence of the catalyst formulation.
摘要:
This disclosure relates to a method for preparing polyalkylenecarbonate. More specifically, in the method for preparing polyalkylenecarbonate, by using a solution polymerization with a specific heterogeneous catalyst and a solvent in the polymerization process of an epoxide compound and carbon dioxide, the products of side-reaction are reduced, removal of metal residues and by-products from the products is facilitated, danger due to overheating of the reactants is minimized, and heat removal and process stability are improved, and thus, high molecular weight copolymer may be easily provided, and mass production and scale-up are easy.
摘要:
The present invention relates to a production method of polyalkylene oxide particles including a step of forming the polyalkylene oxide particles by polymerization of an alkylene oxide in a polymerization solution containing a polymerization solvent and a catalyst dispersed in the polymerization solvent. The average particle diameter of the catalyst is 25 μm or less.
摘要:
The present invention provides a highly efficient process for manufacturing copolyether glycol having a mean molecular weight of from about 650 to about 5000 dalton by polymerization of tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms. More particularly, the invention relates to a process for manufacturing copolyether glycol which comprises recycle to the polymerization reaction step of at least a portion of the oligomeric cyclic ether which is co-produced with the copolyether glycol, said process exhibiting an Space Time Yield value of greater than about 0.9.
摘要:
The present invention relates to processes for preparing ethylene oxide (EO)-capped polyols in which removal of catalyst residues or salts formed by the neutralization of the basic catalyst is not required prior to discharging the polyol from the reactor because neutralization occurs during or after the starter charge of a subsequent batch. The inventive processes allow for the preparation of DMC-catalyzed intermediates and their base-catalyzed EO caps within the same reactor. Polyols produced by the processes of the invention have a high content of primary hydroxyl groups and may be useful for producing polyurethane foams, elastomers, sealants, coatings, adhesives and the like.
摘要:
A process for preparing polyetherols by ring-opening polymerization of alkylene oxides onto H-functional initiator molecules comprises at least one process step a) in which a compound of the formula (I) M′aM″b(OH)cOd* Ae*Lf (I), is applied to a solid inert support or incorporated in the latter or molded to form a shaped body is used as catalyst, and at least one process step b) in which a multimetal cyanide compound of the formula (II) M1a[M2(CN)b(A)c]d·fM1gXn·h(H20) eL (II) is applied to a solid, inert support or incorporated in the latter or molded to form a shaped body or in powder or paste form is used as catalyst.
摘要:
A process for polymerizing oxepanes, dioxolanes, trioxanes, and tetrahydrofurans to their respective polymers by contacting them with a selected metal compound and an accelerator which is a selected vinyl ester or a selected phosphorous compound.
摘要:
A photocurable composition comprising (1) an epoxy compound having at least one epoxy group and at least one unsaturated double bond in the same molecule; (2) a metal compound present in an amount ranging from 0.001 to 10 wt. %, based on the epoxy compound; and (3) a silicon compound which is capable of forming a silanol group when irradiated with light and which is present in an amount ranging from 0.1 to 20 wt. %, based on the epoxy compound, is characterized by a particularly rapid curing rate.