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7163997 |
Polyether derivative and process for producing the same
The present invention relates to a polyether derivative represented by the following general formula (I):
wherein X 1 represents —CO— or —SO 2 —; Ar 1 represents unsubstituted...
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6977290 |
Process for preparing oligomeric aliphatic diols, polycarbonatediols based thereon and prepolymers thereof
The present invention relates to a method for preparing oligomeric aliphatic diols, polycarbonatediols based thereon and NCO-terminated prepolymers obtainable therefrom. The inventive compounds may...
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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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6812265 |
Liquid composition polymerizable into organic glasses having good optical and physico-mechanical properties
Liquid composition which can be polymerized into organic glasses, by means of radical polymerization with low shrinkage, comprising the product obtained from the trans-esterification of a...
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6777528 |
Process for producing polycarbonate resin
A process for producing a polycarbonate resin which comprises performing melt polycondensation of pentacyclopentadecanedimethanol or pentacyclopentadecanedimethanol and diol with carbonic acid...
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6605356 |
Metal surface treatment agent, and metal material coated with same
A metal surface treatment agent containing the following components (A) to (D), which securely adheres to a metal substrate such as aluminum, exhibits excellent corrosion preventive properties,...
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6531566 |
Polyoxyalkylenepolyols and process for producing ring-opened polymer
A polyoxyalkylene polyol or monool (I) of the general formula (1) below, in which not less than 40% of the terminally located hydroxyl-containing groups, namely —AO—H groups, are primary...
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6262127 |
Polymeric matrices and their uses in pharmaceutical compositions
This invention provides pharmaceutical compositions comprising polymeric matrices, especially those comprising IL-6 as an active ingredient. Specific novel poly(ethylene carbomate) polymers are...
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6252013 |
Method for making siloxane copolycarbonates
A melt condensation polymerization process for preparing siloxane copolycarbonates is provided. The process includes reacting an aromatic dihydroxy compound, carbonic acid diester, hydroxyaryl...
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6153672 |
Composition of tris-pyrrolidonyl triazine and polyfunctional active H-containing material
A process for preparing a tris-lactam crosslinking agent, tris-pyrrolidonyl triazine, from N,N',N"-tris(4-chlorobutyryl)melamine by treatment of the chlorobutyryl derivative with a base such as...
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6107369 |
Crosslinked film of tris-pyrrolidonyl triazine and polyfunctional active H-containing material
A process for preparing a tris-lactam crosslinking agent, tris-pyrrolidonyl triazine, from N,N',N"-tris(4-chlorobutyryl)melamine by treatment of the chlorobutyryl derivative with a base such as...
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6106918 |
Optical quality polycarbonates
Bischloroformate oligomer compositions are prepared by passing phosgene into a heterogeneous aqueous-organic mixture containing at least one dihydroxyaromatic compound, with simultaneous...
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5977262 |
Preparation of hydroxy urethanes
The reactions of cyclic carbonates, especially 1,3-dioxolan-2-ones, with amines, especially primary amines, are catalyzed by the presence of a base whose conjugate acid has a pKa of about 11 or...
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5969081 |
Cyclic oligomers comprising m-phenylene isophthalamide and polymers thereof
Disclosed herein are cyclic oligomers comprising substituted or unsubstituted m-phenylene isophthalamide, complexes of these oligomers with selected metal salts, novel methods for their...
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5945464 |
Ultraviolet-curable, resin-forming thiol-ene compositions
The ultraviolet-curable, resin-forming composition which comprises a polycarbonic acid ester such as diethylene glycol bis(allyl carbonate), a polythiol such as pentaerythritol...
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5910548 |
Process for producing modified epoxy resin, modified epoxy resin produced, and epoxy resin composition thereof
The process for producing a modified epoxy resin comprises reacting (a) an epoxy resin having at least two epoxy groups per one molecule, and (b) a specific active ester group-containing compound...
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5756781 |
Method for making tris(hydroxyphenyl) compounds using ion exchange
An improved method for the preparation of tris(4-hydroxyphenyl) compounds is provided. In particular, an improved method for preparing 1, 1,1-tris(4'-hydroxyphenyl)ethane is provided which...
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5723562 |
Process for polymerization reactions with functionalized peroxides
Novel functionalized peroxides which may be used as crosslinking, grafting and curing agents, initiators for polymerization reactions and as monomers for condensation polymerizations to form...
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5719259 |
Perfluoroalkylene oxide copolymer composition containing functional groups
Perfluoroalkylene oxide copolymer having acid fluoride moieties are prepared by reaction of hexafluoropropylene oxide and 1,2-epoxypentafluoropropane 3-fluorosulfate in the presence of a cesium...
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5637664 |
Polymeric, catalytically active compounds, their preparation, and their use as catalysts in the preparation of polyisocyanates containing uretdione groups
Polymeric, catalytically-active compounds having imidazole groups linked terminally and/or laterally to the polymer chain through reactive groups on the polymer chain are disclosed. The polymer...
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5633342 |
Method for the synthesis of environmentally degradable block copolymers
A method is provided for the synthesis of environmentally degradable block copolymers which includes the sequential polymerization of polymer-forming materials in the presence of one or more...
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RE35499 |
Elimination of monocarbonate from polycarbonate
A polycarbonate composition, and process for making same, wherein the monocarbonate and dicarbonate content is eliminated or limited to negligibly low levels by withholding introduction of chain...
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5623026 |
Siloxanes containing epoxy groups, and mixtures thereof with polycarbonates
Siloxanes containing epoxy groups having the formula 1 ##STR1## Formula 1 wherein A means a C 1 -C 20 alkyl radical with epoxy groups B means R 1 or A R 1 , R 2 independently of each...
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5597887 |
Branched polycarbonate preforms, blow moldable polycarbonate and method for making
Blow moldable polycarbonate is produced by first producing a polycarbonate preform by a melt transesterification process. The polycarbonate preform comprises 2.1 to 10 mole percent polyfunctional...
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5580951 |
Method for preparing aromatic bischloroformate compositions and polycarbonates
Bischloroformate oligomer compositions are prepared by passing phosgene into a heterogeneous aqueous-organic mixture containing at least one dihydroxyaromatic compound, with simultaneous...
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5527879 |
Polyfunctional polycarbonate polyol
Disclosed is a coating composition comprising: (1) a polycarbonate polyol having an average molecular weight of 400-10,000 and a hydroxyl value of 50-350, and (2) a melamine resin curing agent,...
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5494997 |
Preparation of by the bischloroformate process of soft segment polycarbonate
A process for preparing a polyestercarbonate copolymer which is nearly devoid of diaryl-carbonates and that exhibits a glass transition temperature lower than bisphenol-A carbonate homopolymer, and...
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5488089 |
Curable resin composition
A curable resin composition, which is not thickened nor gels during storage, can be high solids, cures even at low temperatures and is excellent in electrostatic coating properties, and which...
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5486593 |
Medical devices fabricated from copolymers having recurring carbonate units
This invention relates to medical devices formed totally or in part from homopolymers or copolymers comprising recurring carbonate moieties.
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5466744 |
Polymerization of macrocyclic poly(alkylene dicarboxylate) oligomers
Macrocyclic polyester oligomer compositions comprising alkylene isophthalate or terephthalate units or the like are prepared by the reaction of a diol with a diacid chloride in the presence of at...
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5464930 |
Article for use in optical application formed from linear polycarbonate resins
Bischloroformate oligomer compositions are prepared by passing phosgene into a heterogeneous aqueous-organic mixture containing at least one dihydroxyaromatic compound, with simultaneous...
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5459226 |
Polycarbonate redistribution method
The present invention is directed to a method for effecting the redistribution of polycarbonate and polycarbonate blends utilizing a tetraorganophosphonium carboxylate salt.
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5426170 |
Method for preparing an aromatic polycarbonate
1. A method for preparing an aromatic polycarbonate having less content of a low molecular weight oligomer which comprises the steps of: (A) conducting an interfacial polymerization reaction in a...
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5399658 |
Gamma-radiation-resistant polycarbonate composition
A gamma radiation-resistant polycarbonate-disulfide resin is disclosed. The incorporation of disulfide linkages in the structure of polycarbonate was found to enhance the resistance of the resin to...
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5393855 |
Thermosetting resin composition
A thermosetting resin composition which comprises (A-2) a vinyl polymer having at least one each of 2-oxo-1,3-dioxolan-4-yl group and a carboxyl group together on the polymer and a catalyst (B)...
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5362841 |
Process for the preparation of high molecular weight halogenated polycarbonate
A process for preparing halogenated polycarbonate wherein the total amount of base the end pH of the aqueous phaser and the amount of coupling catalyst employed in the reaction are controlled to...
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5362839 |
Polycarbonate having reduced carbonate byproduct content
A process for preparing polycarbonate wherein a chain terminator is added to the reaction mixture after substantial reaction of a carbonate precursor, a coupling catalyst is added to the reaction...
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5360889 |
Soft polycarbonate resin
A soft polycarbonate resin represented by formula (I): ##STR1## wherein A represents a polyether block consisting essentially of a structural unit represented by formula (II): --CH 2 --CH 2 ...
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5349102 |
Process for the preparation of phenyl carbonates or polycarbonates
A process for the preparation of an aromatic carbonate or polycarbonate from a phenol or bisphenol, methanol, carbon monoxide and oxygen comprising the steps of 1) reacting phenol or bisphenol with...
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5332800 |
Cyclic aromatic amide oligomers
This invention concerns cyclic aromatic amide oligomer compositions and a process for preparing such cyclic oligomers.
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5322919 |
Process for producing a polycarbonate in inert solvent
A process for producing polycarbonates which comprises transesterifying by reacting (A) at least one compound selected from the group consisting of aromatic dihydroxy compounds, aliphatic dihydroxy...
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5314779 |
Imaging members and processes for the preparation thereof
A process for the preparation of layered photoconductive imaging members which comprises forming layers comprised of a mixture of cyclic oligomers with degrees of polymerization of from about 2 to...
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5296567 |
Thermocurable compositions
The present document describes the use of an inhibitor for cationic polymerization as an additive to a thermocurable composition based on at least one cationically polymerizable organic material...
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5294729 |
Process for the preparation of a block oligocarbonate
A process for preparing a block oligocarbonate is disclosed. The oligocarbonate conforms to ##STR1## where R denotes hydrogen or ##STR2## and where A denotes an aromatic carbonate structure...
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5288837 |
Preparation of polycarbonate with subsequent addition of chain terminator and base
A process for preparing polycarbonate wherein a chain terminator is added to the reaction mixture after substantial reaction of a carbonate precursor, a coupling catalyst is added to the reaction...
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5266659 |
Solid state process for the preparation of high molecular weight poly(arylcarbonate)s from amorphous oligomer
The invention disclosed is an improved process for the preparation of high molecular weight poly(arylcarbonate), the molecular weight ranging from 45,000-60,000 (corresponding to n inh 0.8 to 1.0)...
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5264548 |
Low melting cyclic polycarbonate composition
A cyclic polycarbonate oligomer having a low melting point useful in the preparation of high molecular weight resins. The cyclic polycarbonate oligomers have structural units with long alkyl chains...
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5252683 |
Coating composition for the prevention of scattering of glass fragments
A coating composition useful for shatter-proofing glass, capable of forming a film which allows an elongation of at least 400%. The coating composition includes (A) a polyurethane compound obtained...
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5239042 |
Amorphous polymers and process for the production thereof
There are disclosed dibenzofuran amorphous polymer comprising a recurring unit represented by following formula (II) and having a molecular weight giving a reduced viscosity of at least 0.2 dl/g as...
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5225518 |
Polycarbonate preparation from molten bisphenol-A/water mixture
In the interfacial polymerization process for preparing aromatic carbonate polymers by reacting bisphenol-A with a carbonate precursor, the bisphenol-A is introduced to the reaction medium in a...
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