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7495065 |
Method of preparing polycarbonate resin
A method of preparing a polycarbonate resin having improved thermal stability is provided. The method includes: mixing polycarbonate having hydroxy terminal groups and a end terminator, a compound...
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7495067 |
Polyester process using a pipe reactor
The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes...
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7495066 |
Copolycarbonate-polyesters, methods of manufacture, and uses thereof
A copolycarbonate-polyester, comprising units of formula
wherein at least 60 percent of the total number of R 1 groups are divalent aromatic organic radicals and the balance thereof are...
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7495063 |
Reduced oligomer concentration in high purity polyalkylene glycols
Polyalkylene glycol compositions having reduced low molecular weight oligomers are disclosed. Some compositions, particularly polyethylene glycol compositions, have a number average molecular...
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7491788 |
High heat polycarbonate compositions, methods for the preparation thereof, and articles derived therefrom
Melt blended compositions, comprising up to 20 wt % of an optional additive, and 80-100 wt % of a copolycarbonate having a Tg of 200° C. or more of (1)
wherein the mole ratio of x:y is 35:65...
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7491792 |
Polymer powder with block polyetheramide, use in a shaping process, and moldings produced from this polymer powder
Moldings can be produced from a polymer powder containing at least one block polyetheramide containing an oligoamide dicarboxylic acid and a polyetheramine; wherein the powder is suitable for use...
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7485695 |
Polycarbonates containing low levels of methyl salicylate prepared by a melt polymerization in a reactive extruder
Polycarbonate is prepared by reactive extrusion on a reactive extruder. A method incorporates the steps of introducing a polycarbonate oligomer, an activated carbonate, and a transesterification...
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7482423 |
Polycarbonates and method of preparing same
Polycarbonates incorporating terminal carbonate groups derived from ester-substituted activated carbonates, for example terminal methyl salicyl carbonate (TMSC) derived from the use of BMSC as the...
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7479258 |
Method for producing an aromatic polycarbonate
It is a task of the present invention to provide a method for producing a high quality, high performance aromatic polycarbonate (which is colorless and has excellent mechanical properties) from a...
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7473756 |
Low-viscosity oligocarbonate polyols
The present invention relates to low-viscosity oligocarbonate polyols, their preparation and use. The oligocarbonate polyols are based on diols of formula I below, which are used in combination...
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7473753 |
Adhesive compositions and methods of using the same
Adhesive compositions are described which comprise at least one organic sulfoxide, sulfone or sulfide and at least one ketone, ether, ester, amide or carbonate or a mixture thereof. The adhesive...
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7462681 |
Polycyanurate compositions
A polycyanurate composition (I), wherein “n” is a positive integer of about 1 to about 10, and wherein R, R′, and R″ comprising at least one of C, H, N, O, F, Si, P, S, Cl, Br, I, and any...
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7462684 |
Preparation of transparent, multilayered articles containing polyesters comprising a cyclobutanediol and homogeneous polyamide blends
Disclosed is a process for the preparation of multilayered, shaped articles having high transparency and low haze and in which at least one layer contains at least one polyester comprising...
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7442757 |
Resin, resin composition, method for manufacturing the same, and molded material including the same
A thermoplastic resin contains a polymer, and the polymer includes a divalent phosphate residue having a spiro ring, represented by formula (1), in a molecule and has a number average molecular...
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7425603 |
Polymers, polymer compositions, and method of preparation
A polymer comprising structural units derived from a polycyclic dihydroxy compound of Formula (I)
wherein R 1 , R 2 and R 3 are independently at each occurrence selected from the group...
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RE40508 |
Thermally stable polymers, method of preparation, and articles made therefrom
Thermally stable polymers comprising resorcinol arylate chain members are prepared using an interfacial method comprising the steps of: (a) combining at least one resorcinol moiety and at least one...
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7405265 |
Method of preparing catalyst for polymerization of aliphatic polycarbonate and method of polymerizing aliphatic polycarbonate
Disclosed is a method of preparing a catalyst for polymerization of aliphatic polycarbonates and a method of polymerizing an aliphatic polycarbonate. This method includes reacting a zinc precursor...
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7402650 |
Process for preparing polyarylate having high thermo-resistance and high transparency
A process for preparing polyarylate wherein a bivalent phenol compound having the structure of Formula 1 and an aromatic dicarboxylic acid halogen compound react to prepare a polyarylate, and...
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7399820 |
Cyclic oligoformals in polycarbonate
A thermoplastic molding composition comprising (co)poly(ester)carbonate, and a cyclic oligoformal is disclosed. The composition that is characterized in its lowered water absorption and improved...
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7390868 |
Catalyst for polycarbonate production and process for producing polycarbonate
Provided are a catalyst for producing polycarbonate comprising a reaction product obtained by reacting (a) a catalyst carrier containing nitrogen or phosphorus with (b) a palladium compound and (c)...
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7375166 |
Polymeric blends for optical devices and method of manufacture thereof
A method for manufacturing a film or sheet comprises deforming a polymeric alloy at a temperature effective to impart to the deformed alloy a birefringence retardation of greater than or equal to...
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7375177 |
Polymers, polymer compositions and method of preparation
A polymer comprising at least one structural unit derived from a dihydroxy compound of Formula (I)
wherein R 1 is an aromatic divalent functionality having 6 to 60 carbons, R 2 can be the...
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7368521 |
Method of producing modified polycarbonate using spray-crystallizing method
Provided is a method of producing a high-molecular weight modified polycarbonate resin. The method includes a melt condensation polymerization process in which transesterification and quick...
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7365149 |
Equipment cleaning in the manufacture of polycarbonates
A surface of a melt polymerization reactor system having residual reaction components of a melt polymerization reaction thereon can be cleaned by introducing a cleaning agent having a phenolic...
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7365148 |
Polycarbonate and process for producing the same
A polycarbonate containing an ether diol residue producible from a polysaccharide and expressed by the following formula (1),
and a diol residue expressed by the following formula (2)
...
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7361724 |
Self assembling monolayer compositions
A surface coating composition for providing a self-assembling monolayer, in stable form, on a material surface or at a suitable interface, as well as a method of preparing such a composition and a...
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7358321 |
High glass transition temperature copolycarbonates, methods of manufacture, and uses thereof
A copolycarbonate is discloses, comprising units of the formula (1)
wherein 70 to 99.5 mole percent of the total number of R 1 groups are derived from a dihydroxy compound of formula (2)
...
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7348394 |
Methods for preparing transparent articles from biphenol polycarbonate copolymers
A method for producing a transparent article is provided. The method comprises melt transesterifying in the presence of a transesterification catalyst and a monomer mixture to produce a biphenol...
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7345133 |
Branched polycarbonates
A branched polycarbonate and processes for its preparation are disclosed. The polycarbonate contains structural units conforming to
in which R 1 , R 2 , R 3 and R 4 mutually independently...
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7342085 |
Synthesis of oligomeric cyanate esters
A cyanate ester system is disclosed. An aryl ether oligomer may be made from a dihydroxyaromatic compound and a dihaloaromatic compound in the presence of a base. The oligomer is then reacted with...
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7339070 |
Method and apparatus for waste stream recovery
A method for recovering a product mixture from a waste stream in a diaryl carbonate manufacturing process comprising reacting the waste stream with an alkyl alcohol to form a reaction mixture, and...
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7339021 |
Method for preparing polycarbonate resin
The present invention relates to a method for preparing polycarbonate resin, and more particularly to a method for effectively preparing polycarbonate resin having a large molecular weight in a...
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7332560 |
Thermoplastic molding compositions having reduced water absorption
A thermoplastic molding composition comprising polycarbonate and at least one (co)polyformal is disclosed. Characterized by its low water absorption the composition is particularly suitable for...
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7332559 |
Method of preparing polycarbonate resin
A method of preparing a high molecular weight polycarbonate resin is provided. In the method, a condensation polymerization process is used so that a mole fraction of arylcarbonate existing in a...
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7329718 |
Aromatic polycarbonate resin, process for producing the same, optical-part molding material, and optical part
The present invention relates to an aromatic polycarbonate resin which comprises repetitive units originating in residual groups of a 2,2-bis(4-hydroxyphenyl)adamantane compound and a...
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7326467 |
Polycarbonate-based resin composition for extrusion molding using sizing die and molded product
A polycarbonate-based resin composition for extrusion molding using a siring die, and a molded product produced by extrusion-molding the resin composition using a sizing die, The...
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7326763 |
Polymers, polymer compositions and method of preparation
A polymer comprises structural units derived from a polycyclic dihydroxy compound of Formula (I)
wherein R 1 is selected from the group consisting of a cyano functionality, a nitro...
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7326764 |
Transparent compositions, methods for the preparation thereof, and articles derived therefrom
A reaction product comprises a first polyester-polycarbonate comprising a polyester unit and a polycarbonate unit, a second polyester-polycarbonate comprising a polyester unit and a polycarbonate...
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7323535 |
Transparent compositions, methods for the preparation thereof, and articles derived therefrom
A reaction product comprises a polyester-polycarbonate comprising a polyester unit and a polycarbonate unit, a polycarbonate polymer, and a transesterification catalyst, wherein the...
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7323536 |
Transparent compositions, methods for the preparation thereof, and articles derived therefrom
A reaction product comprises a polyester-polycarbonate comprising a polyester unit and a polycarbonate unit, and a transesterification catalyst. The reaction product has a haze of less than 5.0%,...
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7317073 |
Method of producing vacuum in the production of polymers
A method is disclosed for producing a vacuum and for separating condensable components present in vapor which accumulates during the production of a polymer by melt-phase polycondensation under...
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7317067 |
Polycarbonate copolymer, and heat resistant parts comprising the same
An object of the present invention is to provide a polycarbonate copolymer having excellent heat resistance and dimensional stability and heat resistant parts comprising the copolymer and suitable...
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7309755 |
Method of producing polycarbonate articles by rotation molding and rotation molded articles made by the method
A method for making a polycarbonate article is described wherein the article is made by rotation molding a melt polycarbonate having a weight average molecular weight from 25,000 to about 36,000....
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7307114 |
Polycarbonate resin composition for use in the production of a substrate for an optical information medium
A polycarbonate resin composition for use in the production of a substrate for an optical information medium, comprising (A) an aromatic polycarbonate resin having a weight average molecular weight...
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7297753 |
Reduction of permeation through a polymer
A method for reducing the permeation rate of a permeable species through a polymeric material includes identifying a solubility-increasing species in the polymeric material having a reversible...
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7297754 |
Method for the preparation of aromatic chloroformates
A method for preparing an aromatic chloroformate comprising, introducing a mixture of at least one aromatic hydroxyl compound, phosgene, at least one solvent, and at least one organic base into a...
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7279544 |
Transesterification process for the production of polycarbonates having a low content of volatile compounds
A multi stage process for the production of polycarbonates having low monomer content is disclosed. The process entails, in sequence, (i) transesterifying in the melt at least one dihydroxyaryl...
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7271235 |
Branched aromatic polycarbonate and its production method
It is to provide a branched aromatic polycarbonate excellent in hue and excellent in melt properties such as melt strength. A branched aromatic polycarbonate obtained by transesterification and...
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7271234 |
Polyarylates for drug delivery and tissue engineering
Biocompatible polyarylates of tyrosine-derived diphenol compounds and poly(alkylene oxide) dicarboxylic acids, articles formed therefrom and therapeutic uses are disclosed.
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7268204 |
Complex of a multimetal cyanide compound and methods of forming polyethercarbonate polyols
A method of forming a polyethercarbonate polyol enhances incorporation of CO 2 into the polyethercarbonate polyol. The method provides a catalyst including a multimetal cyanide compound. The...
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