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7498401 Thermoplastic polycarbonate compositions, articles made therefrom and method of manufacture  
A thermoplastic composition, contains a polycarbonate resin, a polycarbonate-polysiloxane copolymer, an aromatic vinyl copolymer, an impact modifier, and a mineral filler, wherein the composition...
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...
6984393 Biodegradable elastomer and method of preparing same  
This invention relates to thermally crosslinked and photo-crosslinked biodegradable and biocompatible elastomeric polymers. The elastomers can be used for biomedical devices such as needles,...
6864347 Nonlinear optical chiral compounds and devices incorporating same  
The present disclosure is in part directed to optical devices for modulating light comprising compounds which spontaneously align. The disclosure is also directed to electro-optic compounds wherein...
6831147 UV-stable polycarbonates optionally mixed with known aromatic polycarbonates, production thereof and use thereof  
The present invention provides UV-stable polycarbonates, optionally mixed with known aromatic polycarbonates, the production and use thereof, wherein the polycarbonates contain terminal groups of...
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...
6740728 Methods for the preparation of polyesters, poly(ester amide)s and poly(ester imide)s and uses of the materials obtained therefrom  
The present invention relates to methods for the preparation of polyesters, poly(ester amide)s and poly(ester imide)s. The materials obtained by the methods of present invention are useful as fluid...
6590022 Process for preparing protective-colloid-stabilized vinylaromatic-1,3-diene copolymers  
A method is provided for producing protective colloid-stabilized vinyl aromatic-1.3-diene-copolymers in the form of their aqueous polymer dispersions or in the form of a powder which can be...
6576735 Polycarbonate resin  
A polycarbonate resin obtainable by reaction of a carbonic acid ester-forming compound with bisphenols consisting essentially of 9,9-bis(4-hydroxy-3-methylphenyl) fluorene and a bisphenol...
6518390 Precursor of a heat resistant resin, heat resistant resin, insulating film and semiconductor device  
A precursor of a polybenzoxazole resin which comprises a crosslinking group in a molecule and has a specific structure, a polybenzoxazole resin obtained from the precursor by the condensation...
6376641 Aromatic-aliphatic copolycarbonate and process for producing the same  
An aromatic-aliphatic copolycarbonate and a process for producing the same which comprises polycondensation of an aromatic dihydroxy compound, such as 1,1-bis(4-hydroxyphenyl)cyclohexane,...
6291125 Terpolymer imaging member and imaging process  
A terpolymer represented by formula ##STR1## is useful in particular in electrophotographic imaging members.
6288206 Chiral polymer compositions exhibiting nonlinear optical properties  
Chiral organic polymers doped with or appended by nonlinear optical dyes are disclosed. The use of chiral polymers produces a more stable noncentrosymmetric environment for the dye molecules...
6177522 Biostable polycarbonate urethane products  
Porous and non-porous polycarbonate urethane polymers having a set of properties suitable for long term implantation within the body of a mammal. The polycarbonate foams and elastomers, comprise a...
6080833 Low-birefringent organic optical component and a spirobiindan polymer  
A low-birefringent organic optical component comprising a polymer prepared by polymerizing a racemic mixture of the monomer with an asymmetric spiro ring represented by general formula (1) as an...
5910562 Copolycarbonate resin and resin composition comprising the same  
A copolycarbonate resin containing a structural unit derived from bisphenol A and a structural unit derived from 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro 5,5!undecane or a...
5872882 Non-linear optical polycarbonates  
The invention relates to non-linear optically active (NLO) polycarbonates and to NLO active waveguides containing these polycarbonates. Waveguides containing these NLO polycarbonates have a low...
5859833 Optical disk grade copolyestercarbonates derived from hydroxyphenylindanols  
Copolycarbonates having low intrinsic birefringence comprise structural units derived from hydroxyphenylindanol, from resorcinol, alkylenedioic acid or eugenolsiloxane, and, optionally, from a...
5856422 Optically active poly(aryl)ethers containing optically pure spirobindane and indane moieties  
Optically active poly(aryl)ether polymers prepared from monomers containing optically pure spirobiindane and/or indane moieties are disclosed. The chiral poly(aryl)ether polymers are of high...
5852156 Polycarbonate composition  
A polycarbonate composition comprises (a) a substantially chlorine-atom free, aromatic dihydroxy compound/carbonic diester transesterification polycarbonate, and the following components (b), (c)...
5852090 Norbornene-substituted bisphenol antioxidants  
The antioxidants of the formulae I and II ##STR1## in which R 1 is methyl or H, R 2 is H or methyl, R 3 is H or C 1 -C 4 alkyl, R 4 is C 1 -C 5 alkyl, R 5 is C 1 -C 5 alkyl,...
5830988 Indane polyetherimides  
Polyetherimide polymers prepared from monomers containing indane moieties are disclosed. The high molecular weight indane polyetherimides are transparent, ductile, and exhibit high glass transition...
5777063 Optically active indane polymers  
Optically active polycarbonate, polyester, and polyurethane polymers prepared from monomers containing optically pure indane moieties are disclosed. The chiral indane polymers are of high molecular...
5712362 Process for the production of UV-stable polycarbonates  
The invention relates to a process for the production of UV-stable polycarbonates, to the polycarbonates obtainable in accordance with the invention and to their use for the production of sheets,...
5710238 Process for preparing branched polycarbonates by solid state polymerization  
This invention involves a novel process for preparing branched polycarbonates employing a solid state polycondensation process; specifically, subjecting a linear crystallized oligomer derived from...
5688896 Non-linear optically active polycarbonate  
The invention pertains to a non-linear optically active (NLO) side chain polycarbonate and to NLO active waveguides containing said polycarbonate. Waveguides containing this NLO polycarbonate have...
5677416 Flame-retardant wholly aromatic polyester and method for preparing the same  
There are disclosed a wholly aromatic polyester represented by formula I with enhanced flame retardance and chemical stability, and a method for the preparing the same. The polymer is prepared in...
5670603 Polymers exhibiting nonlinear optical properties  
This invention relates to polymers having non-linear optical properties which polymers include fluorene moieties having at least one electron accepting group and at least one electon donating group...
5652324 Process for the production of thermoplastic polycarbonate  
The invention relates to a transesterification process for the production of thermoplastic, solventless oligo-/polycarbonates in which aromatic diphenols and carbonic acid diaryl esters are...
5652312 Redistribution of organic polyestercarbonate compositions  
Polyestercarbonates, particularly those containing aliphatic dicarboxylic acid-derived structural units, are redistributed by heating in the presence of a carbonate redistribution catalyst, and,...
5621065 Polycarbonate diols, their preparation and use as starting products for polyurethane plastics  
This invention relates to novel polycarbonates having hydroxyl end groups and an average molecular weight of 500 to 12,000, as determined by measuring the OH number, and being based on dimer diols...
5556936 Aromatic polycarbonates having polyfunctional UV screening units, method for making and use  
UV stabilized polycarbonates are provided having chemically combined polyhydric phenol benzotriazole carbonate units, such as...
5545710 Use of special polycarbonates for the production of optical articles  
The present invention provides the use of polycarbonates containing carbonate structural units of the formula (I), ##STR1## for the production of optical articles, novel polycarbonates, which...
5532331 Thiodiphenol copolycarbonates and their use as components of multilayered polymeric reflective bodies  
This invention provides novel copolycarbonates that exhibit improvements in glass transition temperature, refractive index, and limiting oxygen index compared to prior art thiodiphenol/bisphenol A...
5525701 Method for the manufacture of aromatic polycarbonate  
Aromatic polycarbonates manufactured by polycondensation of a dihydric compound and a carbonic acid diester using at least two reactors in series have improved color and low impurities content when...
5516877 Crosslinkable carbonate polymers of dihydroxyaryl fluorene  
There are disclosed carbonate polymers of dihydroxyaryl fluorene having crosslinkable moieties. There are also disclosed such polymers in the form of composites. The polymers of this invention are...
5470939 Polycarbonate copolymer  
A polycarbonate copolymer having a desirable heat resistance and impact resistance, which comprises a carbonate structural unit of the formula (I): ##STR1## wherein A is alkylidene, alkylene,...
5464923 Polymer compositions containing substituted biphenyl pyrazines  
The present invention provides novel substituted biphenyl pyrazines or pyrazine derivatives ("BPD") which are functional and have useful application as a monomer for a variety of high performance...
5424389 Polycarbonate copolymer of spirobisindan and bisphenol-A, method of preparing such a copolymer and optical components of such a copolymer  
A polycarbonate copolymer of a spirobisindan (6,6'-dihydroxy-3,3,3',3'-tetramethyl-1,1'-spirobisindan) and bisphenol-A in which the mole fraction of the spirobisindan α ranges between 0.844 and...
5420226 Method of making photoreceptor charge transport layers  
A method of making a photoreceptor charge transport layer involves the steps of applying at least one macrocyclic carbonate oligomer to a supporting surface, and in situ polymerizing the at least...
5405926 Polymer compositions and products made therefrom having nonlinear optical properties; methods for their synthesis, and for the production of the products  
This invention provides novel polyethers and polycarbonates which exhibit nonlinear optical response, and which have utility as a transparent optical component in optical light switch and high...
5391693 Process for producing a polycarbonate copolymer  
A polycarbonate copolymer having a desirable heat resistance and impact resistance, and a process for producing the copolymer. The polycarbonate copolymer comprises a carbonate structural unit of...
5380814 Aromatic polycarbonate and process for production thereof  
A process for producing an aromatic polycarbonate by reacting an aromatic dihydroxy compound, an alkali or alkaline earth metal base and a carbonyl halide compound comprises feeding a...
5344910 Heat-resistant polycarbonate resins containing 2-alkyl-3,3-bis(p-hydroxyphenyl)phthalimide  
Polycarbonate resins containing repeating or recurring polymer chain units of the formula: ##STR1## wherein R represents alkyl are useful in high temperature applications, when thermoplastically...
5321116 Process for preparing random copolycarbonate  
A process for preparation of a random copolycarbonate from an ortho-substituted dihydric phenol and a non-ortho-substituted dihydric phenol.
5319065 Process for producing polycarbonate resin having specific terminal OH/CO value  
There is provided a process for producing a polycarbonate resin containing less amounts of a terminal OH group and a residual monomer and having excellent heat resistance efficiently with a simple...
5312890 Polycarbonate compositions comprising bisphosphine oxide monomer  
Bisphosphine oxide monomers and homologs thereof may be incorporated into polycarbonates in order to obtain a flame retardant polymer. More particularly, bis[2,5-(diphenylphosphine...
5283314 Process for the production of a branched polycarbonate with emulsion having interfacial area  
A process for producing a branched polycarbonate comprising reacting a dihydric phenol, such as 2,2-bis(4-hydroxyphenyl) propane, a polyfunctional organic compound, such as...
5276213 Special dihydroxydiphenyl bicycloalkanes, their production and their use for the production of high molecular weight polycarbonates  
Dihydroxydiphenyl bicycloalkanes characterized in that they contain 9 to 13 ring C atoms in the bicycloaliphatic component are disclosed. The disclosed compounds were found to be suitable for the...
5247053 Halogenated copolycarbonates having improved end group selectivity and resistance to degradation  
A halogenated copolycarbonate, including a poly(ester/carbonate), which contains reduced levels of phenolic end groups and end groups which result from side reactions of process chemicals with the...
Matches 1 - 50 out of 189 1 2 3 4 >