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7488772 |
Polymerization of macrocyclic polyester oligomers using N-heterocyclic carbene and metal amide or metal alkoxide catalyst
Mixtures or adducts of N-heterocyclic carbenes with metal amides or metal alkoxides are effective catalysts for the polymerization of macrocyclic polyester oligomers. The catalysts are stable at...
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7456249 |
Catalyst, its preparation and the polymerization of cyclic ethers over this catalyst
The present invention relates to a solid, acid catalyst for the preparation of polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers by polymerization of...
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7417075 |
Cationically polymerizable composition, actinic radiation curable ink-jet ink, and production method of cationically polymerizable composition
A cationically polymerizable composition containing a cationically polymerizable compound and a cationic polymerization initiator, wherein a total content of a cationic compound, a metal compound...
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7368524 |
Cationically curing two component materials containing a noble metal catalyst
The invention relates to two-component preparations comprising epoxy compounds and a noble metal species, in particular for the preparation of dental compositions. The invention particularly...
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7034103 |
Process for production of polyols with hydroxide containing double metal cyanide (DMC) catalysts
The present invention provides process for producing polyols using a crystalline, hydroxide containing double metal cyanide (DMC) catalyst of the formulae (I) or (II),
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6830704 |
Composition of 2-cyanoacrylate, lewis acid metal salt and clathrate
A 2-cyanoacrylate composition useful as an adhesive contains a Lewis acid metal salt comprising a metal such as aluminum, gallium, indium or thalium, and the conjugate base of an acid such as a...
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6815529 |
Catalyst for producing aliphatic polycarbonate and the preparation thereof
This invention relates to a catalyst for producing aliphatic polycarbonate, which is composed of a rare-earth coordination compound; an alkyl metal compound; a polyol; and a carbonate. The...
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6794451 |
Cationically polymerizable liquid composition and tacky polymer
A cationically polymerizable liquid composition is formed from a cationically polymerizable mixture (A) and a solid resin (B) that is compatible with the mixture (A) at room temperature and has a...
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6632897 |
Use of nano-scaled metal oxide particles as polymerization catalysts
Described is the use of nanoscale metal oxide particles as catalysts for the thermal and/or photochemical polymerization of species having at least one polymerizable carbon-carbon multiple bond...
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6569981 |
Crystallizing polyether polyols, a method for producing them and use of the same
This invention relates to crystallizing polyether polyols which can be produced firstly by the reaction of propylene oxide and polyhydroxy compounds in the presence of an alkoxy compound which...
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6547985 |
Composition of 2-cyanoacrylate, Lewis acid metal salt and clathrate
A 2-cyanoacrylate composition useful as an adhesive contains a Lewis acid metal salt which comprises a specific metal such as aluminum, gallium, indium or thallium, and the conjugate base of an...
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6512074 |
Polymerization catalysts of oxirane compounds and process for preparing polymers of oxirane compounds using the catalysts
Polymerization catalysts of oxirane compounds are catalysts which are suitable to carry out suspension precipitation polymerization of the oxirane compounds in an organic solvent which cannot...
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6458918 |
Method for producing partially crystalline polyether polyols
The present invention relates to a process for the preparation of novel, partially crystalline polyether polyols with a functionality of ≧2, an average molecular weight M n of 500 to 100,000 and...
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6437090 |
Curing catalyst, resin composition, resin-sealed semiconductor device and coating material
A curing catalyst comprising at least one of a cationic curing catalyst component and an organo-metallic compound component. At least one of these components is capable of reversibly repeating the...
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6403842 |
Processes for producing poly(alkylene ether) glycol
Disclosed are a process for producing a poly(alkylene ether) glycol which comprises polymerizing a cyclic ether in the presence of at least a catalyst and a carboxylic acid anhydride, wherein the...
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6359108 |
Method for polymerizing cyclic ether
A process for polymerizing cyclic ethers over a heterogeneous catalyst comprises using a heterogeneous catalyst comprising one or more pillared interlayered clays (PILCs).
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6281154 |
Compounds having one group 13 element, bound with one mono- or di-anionic trident ligand, a method of preparation and application thereof as polymerization catalysts
Novel compounds having one group 13 element bound with one mono- or di-anionic tridentate ligand, a method of preparation thereof and use thereof as a copolymerization catalyst.
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6207793 |
Process for production of polytetramethylene-ether-glycol-diester using halloysite catalyst
An improved process for Polytetramethylene-Ether-Glycol-Diesters of the formula R--CO--O(CH 2 --CH 2 --CH 2 --CH 2 --O)n-COR 1 , in which R and R 1 are identical or different and are alkyl...
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6096836 |
(Hetero)aromatic ether, (thio)ester or (thio)carbonate epoxy catalyst
Disclosed herein is a curing catalyst comprising at least one compound which is a substituted or unsubstituted aromatic or heteroaromatic compound and having any one of groups (I) --O--R 1 , (II)...
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6015914 |
Compound having oxetanyl group, process for producing same, and curing composition
Provided is a compound having an oxetanyl group and represented by the following formula: ##STR1## wherein R 1 represents a methyl group or an ethyl group and R 2 represents a hydrogen atom, a...
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5969059 |
Impregnation resin composition
An impregnation resin composition comprising an alicyclic epoxy compound, an acid anhydride, an aluminum compound having an organic group, and butylglycidyl ether, wherein the alicyclic epoxy...
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5952458 |
Process for preparing a vinyl terminated polymer
Synthesis of a vinyl terminated polymer by reacting a cationically polymerizable monomer in the form of a cyclic ether with an acid chloride in a suitable solvent and in the presence of a Lewis...
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5942595 |
Process for co-polymerization of formaldehyde with cyclic ethers in the presence of organic nitro compounds
Disclosed is a process for copolymerization of formaldehyde with cyclic ethers in the presence of organic nitro compounds. The process enhances the selectivity for the cyclic copolymer.
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5922633 |
Thermal latent acid catalyst
A thermal latent acid catalyst which comprises (i) a compound having an epoxy group, (ii) a compound having a sulfur atom of the following formula: R 5 --S--R 6 , wherein R 5 and R 6 are the...
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5886138 |
Process for the preparation of tetrahydrofuran polymers
A process for the continuous and discontinuous production of tetrahydrofuran polymers by homopolymerizing tetrahydrofuran or copolymerizing tetrahydrofuran with 1,2-alkylene oxides in the presence...
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5811497 |
Aromatic curing catalyst for epoxy resins
Disclosed herein is a curing catalyst comprising at least one compound which is a substituted or unsubstituted aromatic or heteroaromatic compound and having any one of groups (I) --O--R 1 , (II)...
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5770678 |
Polymerization of, and depolymerization to, cyclic ethers using selected metal compound catalysts
A process for polymerizing oxiranes, oxetanes, oxepanes, dioxolanes, trioxanes, and tetrahydrofurans to their respective polymers by contacting them with a selected metal compound is disclosed; and...
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5712331 |
Curable epoxy compositions containing aziridine in supercritical fluid carbon dioxide
A curable resin system in supercritical carbon dioxide as diluent includes an epoxy resin, a co-reactant selected from poly N-substituted aziridines, and a catalyst to promote cure at ambient...
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5663289 |
Preparation and polymerization of initiators containing multiple oxetane rings: new routes to star polymers
This invention relates to novel multifunctional oxetanes, i.e., compounds having multiple oxetane groups, which are useful as initiators in the preparation of star polymers and polymer cascades...
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5641857 |
Preparation of polytetrahydrofuran
Polytetrahydrofuran or polytetrahydrofuran monoesters of C 1 -C 20 -monocarboxylic acids or polytetrahydrofuran monoethers of monohydric C 1 -C 20 -alcohols, having an average molecular weight...
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5641853 |
Polymerization of cyclic ethers using selected metal compound catalysts
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...
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5614126 |
Solventless curable resin composition, in particular for the fabrication of prepregs
The invention relates to a substantially solventless curable resin composition, in particular for the fabrication of prepregs, which contains more than 45% by weight of substances which are solid...
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5478920 |
Cyclic ether polymerization using silicon compound accelerators
When selected silicon compounds are added to cationic polymerizations of cyclic ethers such as oxiranes and tetrahydrofurans, the rate of polymerization is often increased, and novel polyethers are...
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5384337 |
Poromeric material having uniformly distributed electrets for maintaining an electrostatic charge
A poromeric material for maintaining an electrostatic charge is provided, the material including a matrix of fibers, a polymeric binder for binding the matrix, and electrets present substantially...
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5344911 |
Process for producing polyoxymethylene copolymer having reduced amount of unstable terminal groups
Processes for producing a polyoxymethylene copolymer includes forming a crude polyoxymethylene copolymer by subjecting a reaction system containing trioxane, a cyclic ether or cyclic formal...
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5290912 |
Process for producing a polyoxyalkylene compound
The present invention has an object of producing a polyoxyalkylene compound by ring-opening polymerization of an alkylene oxide to a certain specific highly hydrophobic initiator. The present...
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5216122 |
Removal of residual ethylene oxide from poly(ethylene oxide)
Residual ethylene oxide is removed from poly(ethylene oxide) by the steps of adding to particles of high molecular weight poly(ethylene oxide) a finely divided solid particulate material which is...
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5124417 |
Initiators for cationic polymerization
Disclosed are novel compounds which are useful as initiators for cationically polymerizable monomers. The novel compounds comprise a carbon containing cation (e.g., trimethyloxonium) which is...
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5109109 |
Process for producing aromatic or heterocyclic polymer with metal halides
A process for producing aromatic polymers which comprise subjecting halogenated aromatic compounds or combinations of aromatic compounds and polyhalogenated aromatic compounds to...
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5032653 |
Direct synthesis by cationic polymerization of nitrogen-containing polymers
A method is provided for the direct synthesis of novel polymeric materials functionalized with desirable nitrogen-containing functional groups such as terminal azido, cyano, carbonylamino or...
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4988797 |
Cationic polymerization of cyclic ethers
Cyclic ethers having 4 and 5 member rings are polymerized with a alcohol initiator and an acid catalyst. The acid catalyst is used at a molar ratio relative to hydroxyl groups of the alcohol...
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4970295 |
Preparation of oxetane polyether polyols using a bleaching earth catalyst
A process for the preparation of polyethers is disclosed in which an oxetane monomer, or a mixture of an oxetane monomer and an oxolane monomer, and a carboxylic acid anhydride are contacted with a...
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4962281 |
Synthesis of stereoregular poly(propylene oxide)
Stereoregular, crystalline, isotactic poly(propylene oxide) is prepared using an effective concentration of a hydrotalcite type catalyst in a process conducted above a temperature of about 100° C....
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4952644 |
Synthesis of ABA triblock polymers and A.sub.n B star polymers from cyclic ethers
ABA triblock and A n B star polymers are produced by sequential cationic polymerization of 4 and 5 member ring cyclic ethers to initially form a B block and subsequent cationic polymerization of 4...
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4943626 |
Primary polyether active hydrogen compounds which are prepared from linked, protectively initiated polyalkyleneoxides
Polyether active hydrogen compounds having at least two terminal active hydrogen groups on primary carbon atoms are prepared by (a) forming polyoxyalkylene molecules each having at least one active...
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4904745 |
Polyalkylene oxide having unsaturated end group and narrow molecular weight distribution
A polyalkylene oxide having unsaturated end groups. The polymer has a distribution of molecular weight Mw/Mn of not more than 1.5, and a process for the same. The polymer is useful as rubber...
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4861839 |
Metal chelate compound and curable coating composition therefrom
A metal chelate compound in which a chelate forming metal is coordinated with a ligand represented by the formula ##STR1## wherein R 1 , R 2 and R 3 , which are the same or different, represent a...
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4728722 |
Preparation of polyoxybutylene polyoxyalkylene glycols having a narrow molecular weight distribution and a reduced content of oligomeric cyclic ethers
A process for the batchwise preparation of polyoxybutylene polyoxyalkylene glycols by copolymerizing tetrahydrofuran with a 1,2-alkylene oxide in the presence of compounds containing reactive...
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4654417 |
Process for preparing polyalkylene oxide having narrow distribution of molecular weight
Polyalkylene oxide having narrow distribution of molecular weight is prepared by a process comprising polymerizing alkylene oxide in the presence of a complex produced by the reaction of an...
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4650853 |
Process of polymerizing epoxides in solvent mixtures to form granular polymer products
Epoxides are polymerized in granular form which is easily processed. The polymerization occurs in a solvent system composed of significant portions of two different solvents.
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