Abstract: 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 separation membranes and as high performance materials.

Abstract: This specification discloses polycarbonates for optical use. These polycarbonates are prepared by reacting a bisphenol and carbonic diester in the presence of an alkaline compound catalyst. These polycarbonates have: (i) an intrinsic viscosity (IV) as determined at 20° C. in methylene chloride of between 0.34 and 0.38; (ii) a glass transition temperature (Tg) as determined by DSC of between 143 and 147° C.; and (iii) an intrinsic viscosity (IV) and glass transition temperature (Tg) ratio complying with the following general formula (A): IV×95.888+107.9<Tg<IV×95.888+113.

Abstract: A poly(arylene ether) polymer includes polymer repeat units of the following structure: —(O—Ar1—O—Ar2—)m—(O—Ar3—O—Ar4—)n— where Ar1, Ar2, Ar3, and Ar4 are identical or different aryl radicals, m is 0 to 1, n is 1-m, and at least one of the aryl radicals is grafted to at least one unsaturated group that is non-aromatic and is adapted to crosslink at a curing temperature below 20° C. without producing volatiles during curing and without providing functional groups after curing. Cured films containing the polymer can have a Tg from 160° C. to 180° C., a dielectric constant below 2.7 with frequency independence, and a maximum moisture absorption of less than 0.17 wt %. Accordingly, the polymer is especially useful in interlayer dielectrics and in die-attach adhesives.

Abstract: A curing agent for epoxy resins, comprising (a) 30 to 99 parts by weight of (i) a modified phenol resin, which is obtained by polycondensation of a heavy oil or pitch, a phenol and an aldehyde compound in the present of an acid catalyst, and/or of (ii) a a phenol resin having a hydrocarbon group with small polarity between phenol nuclei represented by the following general formula (I): wherein R1's may be the same or different from each other and each represent an alkyl group having 1 to 10 carbon atoms, substituted or nonsubstituted phenyl group, substituted or nonsubstituted aralkyl group or alkoxy group; Z's may be the same or different from each other and each represent a divalent hydrocarbon group having 1 to 20 carbon atoms to which a nitrogen atom, oxygen atom, phosphorus atom or sulfur atom may be bonded, at least one Z in one molecule is a divalent hydrocarbon group having 5 to 20 carbon atoms to which a nitrogen atom, oxygen atom, phosphorus atom or sulfur atom may be bonded; n is a number of 0 to 8

Abstract: A polyether copolymer comprising (A) an aromatic polyether block and (B) an aliphatic polyether block is provided.

Abstract: The invention relates to a crosslinked, carboxylic acid-based copolymer having good water absorbability and biodegradability, and a method for producing it; to an unsaturated carboxylic acid polymer having good detergency and its use; and to a biodegradable builder, a detergent composition and a dispersant. The invention includes (1) a crosslinked product of a copolymer from a monomer component that comprises an unsaturated monocarboxylic acid monomer and a specific amount of a quinone; and (2) an unsaturated carboxylic acid polymer which gives specific peaks in proton nuclear magnetic resonance spectrometry, and which has a specific number-average molecular weight and has calcium ion-sequestering ability, or an unsaturated carboxylic acid polymer having a specific structure.

Abstract: A process for producing 2,2′,3,3′,5,5′-hexamethyl-[1,1′-biphenyl]-4,4′-diol, which process comprises, while setting a pH of a reaction liquid containing an alkaline aqueous solution, a surfactant, a copper catalyst and 2,3,6-trimethylphenol during a reaction in the range of from 8 to 14 and controlling the variation range of the pH of the reaction liquid within ±1, oxidatively coupling the 2,3,6-trimethylphenol with an oxygen-containing gas, and a process for producing a bifunctional phenylene ether oligomer compound having a controlled average molecular weight, comprising carrying out oxidation polymerization under a proper oxygen concentration.

Abstract: The present invention relates to a hot melt moisture cure adhesive composition well suited for bonding porous substrates such as fabric, methods of adhesively bonding substrates and corresponding articles. The adhesive composition exhibits a combination of flexibility, high green strength, low molten viscosity and high heat resistance. In view of these properties, the adhesive is particularly amendable to hot melt adhesive application techniques wherein small individual discrete deposits of adhesive are applied to a substrate. The adhesive composition prepolymer is preferably the reaction product of at least one polyol, at least one polyisocyanate and at least one high molecular weight thermoplastic polyurethane lacking hard segments.

Abstract: A process for manufacturing an &agr;-dihydroxy derivative from an aryl allyl ether wherein such &agr;-dihydroxy derivative can be used to prepare an &agr;-halohydrin intermediate and an epoxy resin prepared therefrom including epoxidizing an &agr;-halohydrin intermediate produced from a halide substitution of an &agr;-dihydroxy derivative which has been obtained by a dihydroxylation reaction of an aryl allyl ether in the presence of an oxidant or in the presence of an oxidant and a catalyst.

Abstract: The object of the present invention is to provide an organic polymer excellent in heat resistance and chemical resistance and having a low dielectric constant.

Abstract: Articles made from a thermoplastic resin composition comprising a high modulus fiber and a resorcinol polyester or resorcinol polyester carbonate resin showing high strength and stiffness along with surprisingly good retention of gloss and color when exposed to weathering.

Abstract: An agent for imparting flame retardancy to a thermoplastic resin contains a polyhydric phenol such as a tannin compound as an effective component. The thermal stability of the thermoplastic resin can be improved so as to elevate the decomposition temperature of the thermoplastic resin if a small amount of the flame retardancy imparting agent is added to the thermoplastic resin so as to suppress the combustibility of the thermoplastic resin.

Abstract: In general terms, the present invention includes a light emitting polymeric material the light emitting polymeric material capable of producing electroluminescence upon being provided with a flow of electrons, the light emitting polymeric material comprising a plurality of polymeric chains comprising polymeric chains each having substituent moieties of sufficient number and size and extending from the polymeric chain and about a substantial portion of the circumference about the polymer chain so as to maintain the polymeric chains in a sufficiently deaggregated state (referred to herein as a “strapped” polymer), so as to substantially prevent the redshifting of the electroluminescence and the lowering of light emission efficiency of the electroluminescence.

Abstract: Herein is disclosed an oxygen scavenging composition, comprising (i) an oxygen scavenging polymer comprising units having structure I: wherein R1 and R2 are independently selected from the group consisting of —O—, —NCO—, and —NR—, wherein R is selected from the group consisting of —H and —C1-C6 alkyls; (ii) a transition metal oxidation catalyst; and (iii) an energy-absorbing compound selected from the group consisting of microwave reactive materials and photoinitiators having a wavelength of maximum absorption of electromagnetic radiation from about 200 nm to about 750 nm. The oxygen scavenging composition can be used to form an oxygen scavenging packaging article.

Abstract: The two-component composition for chemical fastenings consists of a first component and a second component separate from the first component. The first component contains a free-radical-curable synthetic resin, which is a mono-acrylate or monomethacrylate of an alkoxylated bisphenol having a viscosity of 100 to 5000 mPa·s at 23° C. The second component is a curing agent for the synthetic resin, such as dibenzoyl peroxide or methyl ethyl ketone peroxide. The first component may also include an accelerator. Good adhesion characteristics in wet concrete are provided by the adhesive composition because a monoacrylate and/or monomethacrylate of an alkoxylated, especially an ethoxylated or propyloxylated, bisphenol is used as the curable synthetic resin.

Abstract: A polyarylene copolymer which comprises (A) from 60 to 3 mol % aromatic compound units having a main chain containing one or more electron-withdrawing groups therein and (B) from 40 to 97 mol % aromatic compound units having a main chain containing no electron-withdrawing groups therein (provided that (A)+(B)=100 mol %), and a proton-conductive membrane comprising the polyarylene copolymer having sulfonic acid groups.

Abstract: Disclosed is a modified polyphenylene ether having a number average molecular weight of not smaller than 4,000, which is obtained by reacting a precursory modified polyphenylene ether with a phenolic compound in the presence of a radical generator, wherein the precursory modified polyphenylene ether comprises a plurality of polyphenylene ether chains each having a terminal phenolic hydroxyl group, wherein the plurality of polyphenylene ether chains collectively have at least one terminal phenolic hydroxyl group modified and wherein not all of the terminal phenolic hydroxyl groups of the plurality of polyphenylene ether chains are modified. Also disclosed is a method for producing the modified polyphenylene ether.

Abstract: Disclosed are polyarylene ether sulfides and polyarylene ether sulfones for optical device and a method for preparing the same. Polyarylene ether sulfides containing fluorine and polyarylene ether sulfones containing fluorine are synthesized through polycondensation of pentafluorophenyl sulfide and pentafluorophenyl sulfone monomer with dihydroxy monomer. In addition, by attaching ethynyl phenol and phenylethynylphenol to terminals of the high molecular weight polymer, solvent resistance of the polymer is increased. Thus, the high molecular weight polymers prepared by very simplified process have low light loss, excellent resistance for heat, solvent and water, and so can be used to manufacture inactive optical waveguide devices.

Abstract: Methods for preparing formaldehyde-free resorcinol resins are disclosed. The methods generally comprise reacting resorcinol first with dicyclopentadiene and then reacting that mixture with an olefinic compound. The resins produced by this method are also disclosed, as are rubber compositions utilizing the present resins. The resins are characterized as having a free resorcinol content of about 1 wt. % or less, and yielding a suitable softening point when used in rubber applications.

Abstract: Blends of novolaks and cyanates, such blends can be thermally hardened in a short time and without using a catalyst and have an excellent storage stability. The resins obtained by the blends can be used as binding agents in abradants or as chip coverings or printed circuit boards (PCB) in electronics.

Abstract: An improvement to the melt transesterification reaction of diaryl carbonate with dihydroxy aryl compound is disclosed.

Abstract: Extrusion of a mixture of an ester-substituted diaryl carbonate, such as bis-methyl salicyl carbonate, a dihydroxy aromatic compound such as bisphenol A and a transesterification catalyst such as tetrabutyl phosphonium acetate (TBPA) affords polycarbonate having a weight average molecular weight of greater than 20,000 Daltons. The extruder is equipped with one or more vacuum vents to remove by-product ester-substituted phenol. Similarly, a precursor polycarbonate having ester-substituted phenoxy endgroups, for example methyl salicyl endgroups, when subjected to extrusion affords a polycarbonate having a significantly increased molecular weight relative to the precursor polycarbonate. The reaction to form a higher molecular weight polycarbonate may be catalyzed by residual transesterification catalyst present in the precursor polycarbonate, or by a combination of any residual catalyst and an additional catalyst such as TBPA introduced in the extrusion step.

Abstract: The invention relates to a process for the preparation of melt processable liquid crystalline terpolyesters of the general formula I by the in situ acetylation of a monomer selected from (4-hydroxyphenyl) acetic acid/ 3(4-hydroxyphenyl)propionic acid and hydroquinone/4,4′-biphenol/2,6-naphthylene diol followed by acidolysis polycondensation with or without a solvent and a catalyst, under reduced pressure for the efficient removal of acetic acid to effect higher molecular weight formation. Post polymerisation is effected at higher temperatures below the decomposition temperature purification by soxhlet extraction using solvent mixtures selected from acetone-alcohol, acetone-methylethyl ketone.

Abstract: The present invention provides a curable polyphenylene ether (PPE) resin, a composition made therefrom, and a process for preparing the resin. The process involves introducing a vinyl group-containing functional group to the terminal end of PPE by modifying the hydroxy and ester groups on the terminal end. Thus, a curable thermosetting PPE resin including a vinyl group on the terminal end can be obtained. Since the dehydrogenation of side chain methyl using n-BuLi is not conducted in the process of the present invention, the process is much easier, and the cost can be decreased.

Abstract: A new phosphazene-based polyester macro-molecule is provided, as is a method for producing the macro-molecule.

Abstract: There is disclosed a (2,5-disubstituted-1,4-phenylene oxide) block copolymer which comprises one or more block structural units represented by formula (I) and at least one particular divalent structural unit in a molecule. There is also disclosed a (2,5-disubstituted-1,4-phenylene oxide) graft polymer which comprises one or more structural units of formula (IV), or three or more of structural unit of formula (IV) and particular divalent structural unit, in a molecule. (wherein R1 represents an unsubstituted or substituted hydrocarbon group, and the two R1s may be the same or different; a represents a number average degree of polymerization and is 5 or more; R4 represents a trifunctional unsubstituted or substituted hydrocarbon group; U represents —CO—, —OCO—, or —NHCO—; and f is 1 or 0.

Abstract: Compositions and methods are provided in which an electrical device is fabricated by incorporating macrocycles in a polymer on a substrate portion of the device, and crosslinking the polymer to form a crosslinked polymer. It is preferred that at least some of the macrocycles are relatively large, including at least six rings in the backbone of a macrocycle. It is also preferred that rings used in forming the macrocycles may be relatively large, preferably having at least six members as in phenyl rings. The intermacrocyclic links can be relatively complex, such as where four macrocycles may be coupled to a single atom or a single phenyl group. In yet other aspects, macrocycles can be heavily conjugated, with more preferred macrocycles having a completely conjugated backbone. In yet other aspects the macrocycles can have backbones with ether, carboxyl, and ethynyl groups, some of which can be used in crosslinking without reliance on an extrinsic crosslinker.

Abstract: Provided are a aromatic liquid crystalline polyester resin having improved low temperature processability, a film having excellent gas barrier property. The aromatic liquid crystalline polyester resin is obtained from an aromatic hydroxycarboxylic acid, an aromatic dicarboxylic acid and an aromatic diol, by optimizing formulation ratio of the above-described three components. The aromatic liquid crystalline polyester resin comprises an aromatic hydroxycarboxylic acid unit, an aromatic dicarboxylic acid unit and an aromatic diol unit, as repeating units, wherein the repeating unit (A) as an aromatic hydroxycarboxylic acid unit, is contained in an amount of 30 mol % or more based on the total amount of repeating units, and the polyester has a logarithmic viscosity of 1.5 dl/g or more, a flow temperature of 300° C. or less, and a melt tension measured at a temperature higher than the flow temperature by 25° C. or more of 1.

Abstract: Disclosed is a select class of liquid crystalline polyesters and molding compositions comprising the polyesters and glass fiber. The liquid crystalline polyesters consist essentially of (1) diacid residues consisting essentially of (i) cyclohexanedicarboxylic acid residues and (ii) other diacid residues selected from terephthalic acid residues, 2,6-naphthalene-dicarboxylic acid residues, or a mixture thereof; (2) diol residues consisting essentially of hydroquinone residues, 4,4′-biphenol residues or a mixture thereof; and, optionally, (3) p-hydroxybenzoic acid residues. In the above definition, the moles of diol residues are equal to the moles of diacid residues and the total of the (1), (2) and (3) mole percentages is equal to 100. The liquid crystalline polyesters have melting points determined by differential scanning calorimetry equal to or less than 360° C.

Abstract: A gas barrier polymer composition with active hydrogen functionality is provided. The polymer may be prepared by reacting a solution of organic diacid containing at least one active hydrogen group and diglycidyl ether in the presence of an optional catalyst. The pressure, temperature, and time parameters of the reaction are preferably regulated to prevent degradation and subsequent incorporation of degradation products of organic diacid containing at least one active hydrogen group into the gas barrier polymer composition. A formulation of the gas barrier polymer composition and a carrier may be used to coat plastic materials, containers, and preforms. The gas barrier polymer composition may also be employed in a method of making multilayer packaging materials or container preforms. The multilayer packaging materials or preforms can be used to make containers useful in packaging gas sensitive substances.

Abstract: A curable resin composition, which comprises a resin formed, in the presence of a transition metal complex, by polymerizing an oxidative-polymerizable compound that contains a phenol-compound-containing vegetable oil. A method for producing a curable resin composition comprising a resin formed, in the presence of a catalyst, by polymerizing an oxidative-polymerizable compound that contains a phenol-compound-containing vegetable oil, wherein the catalyst is a transition metal complex. The curable resin composition is useful as a raw material for a urushi-like coating, a friction material, a brake lining material, a brake pad material, a material for forming a coating film, a compound for a recording material, a raw material for an ink, a raw material for a coating,.a raw material for a adhesive, a raw material for an epoxy resin, a raw material for a photoresist or antioxidant, and a starting material for a functional polymer.

Abstract: A polyether copolymer comprising (A) an aromatic polyether block and (B) an aliphatic polyether block is provided.

Abstract: There is disclosed a (2,5-disubstituted-1,4-phenylene oxide) block copolymer which comprises one or more block structural units represented by formula (I) and at least one particular divalent structural unit in a molecule. There is also disclosed a (2,5-disubstituted-1,4-phenylene oxide) graft polymer which comprises one or more structural units of formula (IV), or three or more of structural unit of formula (IV) and particular divalent structural unit, in a molecule.

Abstract: Polyesters may be prepared by reacting an amyl diiodide, an aliphatic or aryl diol and carbon monoxide in presence of a catalyst and an organic base. The process is preferentially carried out in a solvent. The catalyst is a heterogeneous catalyst containing a metal selected from a group containing Palladium, Platinum, Nickel and Cobalt. Following the formation of polyester, the catalyst can be easily separated and efficiently recycled.

Abstract: An aromatic polyester having the following structural units, (1), (2), (3), (4) and (5), wherein the amount of the structural unit (1) is 30 to 50% based on the total of the all structural units, (2)/(3) is more than 2.78 and smaller than 4, (4)/(5) is more than 1.0 and smaller than 1.5, and {(2)+(3)}/{(4)+(5)} is from 0.9 to 1.1: wherein Ra, Rb, Rc, Rd, Re and Rf each independently represents a lower alkyl group, lower alkoxy group, phenoxy group, phenyl group or halogen atom, and l, m, n, o, p and q each independently represents an integer from 0 to 3, is provided; and the aromatic polyester has excellent molding property and a molded article made from this polyester has excellent soldering temperature resistance and rigidity.

Abstract: The invention relates to 2,7-substituted-9-substituted fluorenes and 9-substituted fluorene oligomers and polymers. The fluorenes, oligomers and polymers are substituted at the 9-position with two hydrocarbyl moieties which may optionally contain one or more of sulfur, nitrogen, oxygen, phosphorous or silicon heteroatoms; a C5-20 ring structure formed with the 9-carbon on the fluorene ring or a C4-20 ring structure formed with the 9-carbon containing one or more heteroatoms of sulfur, nitrogen or oxygen; or a hydrocarbylidene moiety. In one embodiment, the fluorenes are substituted at the 2- and 7-positions with aryl moieties which may further be substituted with moieties which are capable of crosslinking or chain extension or a trialkylsiloxy moiety. The fluorene polymers and oligomers may be substituted at the 2- and 7′-positions. The monomer units of the fluorene oligomers and polymers are bound to one another at the 2- and 7′-positions.

Abstract: Provided are a aromatic liquid crystalline polyester resin having improved low temperature processability, a film having excellent gas barrier property. The aromatic liquid crystalline polyester resin is obtained from an aromatic hydroxycarboxylic acid, an aromatic dicarboxylic acid and an aromatic diol, by optimizing formulation ratio of the above-described three components. The aromatic liquid crystalline polyester resin comprises an aromatic hydroxycarboxylic acid unit, an aromatic dicarboxylic acid unit and an aromatic diol unit, as repeating units, wherein the repeating unit (A) as an aromatic hydroxycarboxylic acid unit, is contained in an amount of 30 mol % or more based on the total amount of repeating units, and the polyester has a logarithmic viscosity of 1.5 dl/g or more, a flow temperature of 300° C. or less, and a melt tension measured at a temperature higher than the flow temperature by 25° C. or more of 1.

Abstract: 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 resulting in unexpectedly long relaxation times as compared with previously used organic polymers. In addition, the NLO/chiral polymer materials exhibit high electro-optical coefficients (r33), high nonlinear optical coefficients (d33), improved long-term thermal stability, and at the same time retain the processing advantages associated with organic polymers. Thus, the present NLO/chiral polymer materials are extremely well-suited for use in second-order nonlinear optical and optoelectronics devices.

Abstract: Amorphous copolyesters containing residues derived from 2,2′-[2,2-](sulfonylbis(4,1-phenyleneoxy))bis(ethanol). They exhibit enhanced heat distortion temperatures and glass transition temperatures without a significant increase in viscosity at low shear rates. The amorphous copolyesters also have improved resistance to attack by lipid solutions and are readily molded and extruded to form medial devices such as connectors, tubes, etc. which are useful for transport of lipids and other medical solutions.

Abstract: Alkylated and/or aralkylated polyhydroxy aromatic compounds prepared by reaction of a polyhydroxy aromatic compound (A) with an alkylene compound (B) at elevated temperature with the addition of a mixture (C) of oxalic acid and boric acid in a molar ratio of from 1:5 to 1:0, are useful, for example, as starting materials for the preparation of condensation polymers.

Abstract: A new two-step process for the preparation and industrial manufacture of calixarenes is disclosed. In the first step, linear phenolic oligomers are prepared in a basic medium from an optionally substituted phenol and a formaldehyde source. The reaction mixture is then neutralized or acidified, and cyclization of the oligomers is brought about at higher temperatures in the same reaction medium which is made water free and optionally completed by higher boiling liquids. The process allows a definite control of the cyclic compounds to be synthesized. Furthermore, novel calixarene compounds are disclosed as well as an installation for carrying out the process on a laboratory or industrial scale.

Abstract: The invention relates to novolac resins obtained by condensation (A) of an aromatic compound containing at least two hydroxyl groups and (B) of an unconjugated diene in an (A)/(B) molar ratio of between 0.7 and 1.75 in the presence of an acidic catalyst, which are characterized in that the content of free aromatic compound is lower than 5% by weight. Also disclosed are a process for the preparation of the resins, and rubber-based compositions including from 0.5 to 20 parts by weight of the above mentioned novolac resins per 100 parts by weight of rubber. The invention also relates to the use of the resins or rubber-based compositions in the field of vulcanization, especially of tires and of conveyor belts.

Abstract: Polyether polymers such as polyetherimides are prepared by a two-step reaction. The first step is the reaction between an alkali metal salt of a dihydroxy-substituted aromatic hydrocarbon, such as bisphenol A disodium salt, and a substituted aromatic compound such as 1,3-bis[N-(4-chlorophthalimido)]benzene, the alkali metal salt being employed in an amount less than stoichiometric. The intermediate low molecular weight polymer thus produced then undergoes reaction with additional alkali metal salt. By this method, a polyether polymer of closely controlled molecular weight can be conveniently prepared.

Abstract: A high-performance anti-reflective coating which highly absorbs a given light, e.g., deep ultraviolet rays, tenaciously adheres to substrates upon coating formation, is satisfactory in covering, and eliminates the influence of standing waves in the production of integrated circuits; novel light-absorbing polymers for forming the anti-reflective coating; and a process for producing the polymers. One of the polymers is produced by esterifying a copolymer comprising carboxylic anhydride groups and/or dicarboxylic acid groups such as maleic acid as basic recurring units with a hydroxylated aromatic chromophore. The unreacted carboxylic acid groups or acid anhydride groups remaining in the esterified light-absorbing polymer may be amidated and/or imidized with an aminated aromatic compound.

Abstract: Process for the preparation of compounds of the formula wherein Hal represents chlorine, bromine or iodine and preferably chlorine, wherein Ra represents hydrogen or a residue comprising one or more additional groups of the formula, from compounds wherein R2 represents hydrogen or a residue comprising one or more additional groups of the formula by reaction with gaseous hydrogen halide in the presence of a catalytic amount of an organic acid; process for the preparation of epoxy compounds starting from the reaction to produce a compound of formula (III) which is converted to a compound of formula (A) that is dehydrohalogenated to form the epoxy rings of a diepoxy compound.

Abstract: The present invention relates to a phenol resin, in particular a phenol resin for resists suitable for forming resist patterns. The phenol resin of the present invention is obtained by reacting at least two components, i.e., a compound (A) such as 4-hydroxymethyl-2,6-dimethylphenol and a polymerizable phenol compound such as parahydroxystyrene or a polymer (B), which is a polymer of the polymerizable phenol compound, in a ratio of 1 to 50 moles of the compound (A) to 100 moles of the polymerizable phenol compound or 100 moles of structural unit of the polymerizable phenol compound contained in the polymer (B) in the presence of an acid and having a molecular weight of 2,000 to 20,000. Such a phenol resin provides good pattern shape, heat resistance, resolution, and sensitivity in resists for lithography.

Abstract: Process for producing highly stretchable, amorphous anisotropic melt-forming polymers consisting essentially of recurring units derived from p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, an aromatic diacid, at least a portion of which comprises 2,6-naphthalene dicarboxylic acid, and an aromatic diol and/or hydroxyamine component, at least a portion of which is 4,4′-biphenol; which comprises incorporating into such polymers recurring units derived from resorcinol, wherein each of said recurring units is present in the polymer in specified amounts.

Abstract: A method for preparing bisphenol A is disclosed, with a selectivity for the p,p′-isomer of greater than about 97%. The method involves reacting phenol with p-isopropenylphenol or 2-(4-hydroxyphenyl)-2-propanol in the presence of a catalyst, at a reaction temperature of no greater than about 65° C. The bisphenol A product is preferably purified by a technique which omits the use of adduct crystallization.

Abstract: Provided herein are novel polymeric coating materials for direct digital imaging by laser. More specifically the novel coating materials are thermally reactive near infrared absorption polymers designed for use with near infrared laser imaging devices. This invention further extends to the preparation and methods of use of the novel materials. The invention is particularly useful in the preparation of lithographic printing plates for computer-to-plate and digital-offset-press technologies. The invention extends to photoresist applications, to rapid prototyping of printed circuit boards and to chemical sensor development.

Abstract: The invention relates to a method for producing and purifying tetrabutyl ammonium phenolate diphenol adduct by reacting an alkali phenolate with tetrabutyl ammonium salts in an aqueous phase and subsequently precipitating the adduct by adding phenol.