Abstract: A process for making a random polyalkylene terephthalate/naphthalate copolymer by synthesizing a bis-(hydroxyalkyl)-naphthalate composition under transesterification conditions, and subsequently combining the bis-(hydroxyalkyl)-naphthalate, a terephthalic acid, and an alkylene glycol under direct esterification conditions to form a random polyaklylene terephthalate/naphthalate copolymer. The preferred bis-(hydroxyalkyl)-naphthalate is bis-(2-hydroxyalkyl)-2,6-naphthalate, with bis-(2-hydroxyethyl)-2,6-naphthalate being the most preferred. Preferably, the bis-(hydroxyalkyl)-naphthalate is added at the initial stage of an acid-based polymer process, and polymerization is initiated or continued to produce a polyester copolymer. Alternatively, the bis-(hydroxyalkyl)-naphthalate is added to phthalate-based oligomers after the initial direct esterification stage, and polymerization is continued to produce a polyester copolymer.

Abstract: The invention relates to Amorphous and/or semicrystalline copolyesters containing .beta.-hydroxyalkylamide groups according to formula (I) ##STR1## whereinP=polymer chain of the polyesterR1=alkyl residues with 1-5 atoms or hydrogen or ##STR2## R2=alkyl residues with 1-5 C-atoms or hydrogen, R3=alkyl residues and 1-5 C-atoms or hydrogen, andn.gtoreq.2,with a molecular weight (Mn) of 300 to 15,000 and a hydroxyl value of 10 to 400 ?mg KOH/g!.

Abstract: There are provided a polyethylene terephthalate resin composition in which to 100 parts by weight of a polyethylene terephthalate resin (A) polymerized by use of a germanium catalyst and having at least 80% of an ethylene terephthalate repetition unit, 0.05 to 30 parts by weight of a compound selected from the group consisting of an epoxy compound having at least two intramolecular epoxy groups without any intramolecular ester linkage and a carbodiimide compound (B) is formulated, and resin compositions in which a fibrous reinforcing material (C), a block copolymer (D) and an inorganic nucleating agent (E) are further formulated in the above mentioned composition. The resin composition of the present invention is excellent in moist heat resistance, fluidity and mechanical strength, and in addition, can be subjected to high cycle molding even in a mold of a low temperature to yield a molded article with improved surface characteristics.

Abstract: The present invention describes a process of making strap using both post consumer and non-post consumer PET of wide distribution intrinsic viscosity (IV) through direct solid state polymerization in a flaked state to produce PET with increased, heterogenous IV suitable for high performance strap extrusion. The process increases the IV of post-consumer resins, consisting principally of polyethylene terephthalate (PET), by chopping the post-consumer plastic into flakes and chunks, rolling the flakes and chunks, preheating the flakes, and further heating the flakes and chunks in an atmosphere of hot nitrogen gas, thereby increasing the intrinsic viscosity. PET polymers having increased viscosities according to the present invention provide a polymer useful in manufacturing high performance strap.

Abstract: A process for making polyetherester resins is disclosed. A glycol ester of an aromatic diacid such as terephthalic acid is reacted with a polyether and a source of a dicarboxylic acid such as maleic anhydride to produce a polyetherester resin, wherein the aromatic diester content may be conveniently adjusted as desired. The process permits the preparation of unsaturated polyetherester resins with relatively high levels of terephthalate repeating units while avoiding the difficulties associated with the direct use of terephthalic acid in previously known procedures. Such unsaturated polyetheresters are useful for making thermoset resins with excellent mechanical and physical properties. New glycol esters based on 2-methyl-1,3-propanediol, and polyester resins and thermosets made from the glycol esters, are also disclosed.

Abstract: This invention relates to a polyester resin comprising (A) from about 5% to about 50% by weight reactive diluent and (B) from about 50% to about 95% by weight of an unsaturated polyester resin prepared from at least one component selected from the group consisting of (i) from about 0.5% up to about 8% by mole of a polyhydric alcohol, having at least three hydroxyl groups, and at least one transesterification catalyst, (ii) from about 2% up to about 12% by mole of a reaction product of a polyol and a fatty carboxylic acid, and (iii) from about 2% up to about 12% by mole of a fatty reactant selected from the group consisting of a fatty primary alcohol, a fatty epoxide, a fatty monocarboxylic acid and mixtures thereof, wherein each member of the group has up to about 100 carbon atoms. In another aspect, the invention relates to mixtures of the above polyester resins with conventional polyester resins. Methods of reducing volatile organic compound emissions are also part of the invention.

Abstract: The present invention relates to a scratch resistant polymer composition having a polymer that includes a copolyetherester elastomer, said polymer having a hardness of from 25D to 82D, and a fluorosurfactant having a nonionic organic head and a tail of the formula CF.sub.3 --(CF.sub.2).sub.x --CH.sub.2 CH.sub.2, where x is an integer from 3 to 15.

Abstract: The present invention relates to a method for forming the LCP composite having LCP fibers dispersed in the matrix resin even if the LCP content may be smaller than the lower limit of the fiber formable range.The method is characterized in that a resin composite reinforced by the LCP fiber in a mixture ratio beyond the fiber formable range or the preferred fiber formable range by means of an extrusion or injection molding of a resin mixture containing a liquid crystal resin composite extruded in the fiber formable range or the preferred fiber formable range.

Abstract: An electronic circuit substrate is sealed with a sealing material made of thermoplastic resin having a thermal-expansion coefficient close to that of a ceramic substrate by a compound filler dispersedly mixed in the sealing material. The filler includes at least two of milled fiber, glass fiber, and flaked filler.

Abstract: This invention relates to the synthesis from PET (virgin, recycled, post consumer, or precursor raw materials) of novel water dispersible or water emulsifiable polyester resins having improved hydrophobicity or non-polar characteristics. These characteristics give the applied film of these dispersions or emulsions much improved water repellency while at the same time retaining their redispersible or reemulsifiable properties. Such resins can be used for many applications in the paper, textile, coatings, paint, construction, and other industries.

Abstract: Disclosed is a water-dissipatable or dispersible adhesive composition that is useful in forming paper articles and other products that can be recycled through repulping in both neutral and alkaline media. The water-dispersible adhesive composition is preferably a hot melt adhesive that is a low molecular weight, branched copolyester containing a sulfomonomer. Additional utility for the invention resides in the manufacture of recyclable articles where insolubility in body fluids combined with solubility in tap water are required.

Abstract: A process for making polyetherester resins is disclosed. A glycol ester of an aromatic diacid such as terephthalic acid is reacted with a polyether and a source of a dicarboxylic acid such as maleic anhydride to produce a polyetherester resin, wherein the aromatic diester content may be conveniently adjusted as desired. The process permits the preparation of unsaturated polyetherester resins with relatively high levels of terephthalate repeating units while avoiding the difficulties associated with the direct use of terephthalic acid in previously known procedures. Such unsaturated polyetheresters are useful for making thermoset resins with excellent mechanical and physical properties.

Abstract: An atmospheric pressure process for the continuous production of polyester is disclosed wherein a melt of bis(3-hydroxy propyl) terephthalate, or its low molecular oligomers, obtained by esterifying terephthalic acid or transesterifying dimethyl terephthalate with propylene glycol, is intimately contacted with an inert gas to facilitate polymerization and removal of the reaction by-products. The propylene glycol evolved and the inert gas are recycled.

Abstract: The present invention provides a production method for a photo-sensitive resin, characterized in reacting a difunctional epoxy resin (B) having two epoxy groups in a molecule with carboxyl groups contained in a resin (A) having two or more (meth)acryloyl groups and at least one carboxyl group in a molecule. Since the photo-sensitive resin prepared by extending the resin (A) to a high molecular weight linearly via the difunctional epoxy resin (B) is obtained, a resist layer having an excellent tack-free property can be formed. Further, a resist layer irradiated with rays through a patterning film can be developed rapidly and correctly in an alkaline aqueous solution. Accordingly, it has been possible to provide the high-performance liquid photo-sensitive resin compositions useful for a solder resist used for producing printed circuit boards and for an electroless plating resist or useful for producing black matrices and color filters for liquid crystal displays.

Abstract: A thermoplastic resin composition having transparency and antistatic properties, comprising 100 parts by weight of a thermoplastic resin (A) having a refractive index of 1.52 to 1.61 and a haze of 40 or less, and 5 to 40 parts by weight of a polyetherester (B) which has a sulfonate group and a polyalkylene oxide group, and is substantially immiscible with the thermoplastic resin (A), the difference in refractive index between the thermoplastic resin (A) and the polyetherester (B) being 0.04 or less. The thermoplastic resin composition has a haze of 40% or less and a surface resistivity of 1.times.10.sup.10 to 1.times.10.sup.14 ohm/square.

Abstract: The present invention is directed to a crack-proof, and resilient article of the PET type that is produced from about 40% to about 90% regrind PET. The article is characterized in that it has an intrinsic viscosity between 0.54 and 0.68. The present invention is also directed to a method for recycling regrind PET for use in the production of a clear, crack-proof, and resilient article includes the steps of:(1) regrinding scrap thermoplastic PET upon isolation from the thermoformed articles into regrind PET;(2) blending the regrind PET with virgin PET to form a blend wherein the percentage of regrind PET in the blend ranges from about 40% to about 90% and the percentage of virgin PET in said blend ranges from about 60% to about 10%;(3) passing the blend of regrind PET and virgin PET through an extruder wherein no more than 10% of said regrind PET in the blend has been recrystallized, the extruder having a throat wherein the temperature ranges from about 550.degree. F. to about 650.degree. F.

Abstract: The invention relates to heat-curable coating compounds containing a carboxyl-functional polyester produced by a condensation reaction from aliphatic and/or cycloaliphatic and/or aromatic polycarboxylic acids and anhydrides, a .beta.-hydroxyalkylamide and special stabilizers.

Abstract: New compounds including bis-.beta.-hydroxy ethyl bibenzoate containing less than 2.5%, and preferably less than 1%, diethylene glycol and a process for the production of the bis-.beta.-hydroxy ethyl bibenzoate by the condensation of 4,4'-biphenyl dicarboxylic acid and ethylene glycol at low temperature and pressure in the presence of a catalyst are disclosed. Use of the compounds to produce polyesters is also disclosed.

Abstract: The present invention describes a prepolymer of aliphatic polyoxaesters containing amines and/or amido groups having polymerizable end groups that may be used to produce surgical devices such as sutures, sutures with attached needles, molded devices, and the like.

Abstract: The present invention relates to liquid crystalline copoly(ester-imides) and a process for the preparation thereof. In particular, the invention relates to liquid crystalline copoly(esteri-imides) comprising structural units derived from N-(3'-hydroxyphenyl)-trimellitic acid imide or N-(4'-carboxyphenyl)trimellitic acid imides optionally in combination with aromatic dicarboxylic acids, dioles or hydroxy acids. The invention also concerns the use of these copolymers in polymer blends, in moulded articles, in fibres, filaments and sheets.

Abstract: Disclosed is a curable resin composition which can be applied for various uses such as top-coating compositions for cars, coating compositions for exterior walls of constructions, heat-resistant coating compositions, adhesives, ink compositions, compositions to be infiltrated into fibers and paper, and surface-treating compositions. The composition comprises (A) a resin obtained by condensation of a polymer having both a hydrolyzable silyl group and a particular functional group except such a hydrolyzable silyl group, and a particular polysiloxane, and (B) a compound capable of reacting with the functional group existing in the resin (A).

Abstract: Poly(alkylene dicarboxylate) polymers and copolymers having tetraalkyl- or trialkylammonium ion end groups and methods of synthesis, thereof. The methylene-containing copolymers, in general, adhere to glass and metals, including aluminum, iron, and copper. Poly(methylene-co-ethylene terephthalate) is a clear film useful in the protection of metals or glass from corrosion or scratching. Glass may be bound to glass or to metal using the polymers of the present invention or metal to metal seals may be made.

Abstract: The present invention is directed to in situ reinforced thermoplastic fibers having improved mechanical properties and a method of making same. These composites have improved tensile strength and tensile moduli that exceed that predicted by composite theory under the rule of mixtures. The in situ composites can be used in woven preforms.

Abstract: Thermoplastic compositions based on polybutylene terephthalate are provided which are useful in high temperature resistant wire coating applications. These compositions generally are four-component alloys with reduced ethylene copolymer (ionomer) content.

Abstract: A biodegradable polyester obtainable by reacting a mixture comprising(a1) from 95 to 99.9% by weight of a polyester P1 obtainable by reacting a mixture essentially comprising(b1) a mixture comprising35-95 mol % of adipic acid or ester-forming derivatives thereof,5-65 mol % of terephthalic acid or ester-forming derivatives thereof, and0-5 mol % of a compound containing sulfonate groups, and(b2) a dihydroxy compound selected from the group consisting of C.sub.2 -C.sub.6 -alkanediols and C.sub.5 -C.sub.10 -cycloalkanediols,with the proviso that a compound D with at least three groups capable of ester formation is employed to prepare the polyester P1,(a2) from 0.1 to 5% by weight of a divinyl ether C1 and(a3) from 0 to 5 mol %, based on component (b1) from the preparation of P1, of compound D,and other biodegradable polymers and thermoplastic molding compositions, processes for the preparation thereof, the use thereof for producing biodegradable moldings and adhesives.

Abstract: A polyester resin composition comprising (A) an aromatic polyester resin and (B) a polyester block copolymer resin which consists essentially of (a) a polyester soft block comprising an aromatic dicarboxylic acid component and a glycol component having 5 or more carbon atoms as main constituents and having a melting point of about 100.degree. C. or less or being amorphous and (b) a polyester hard block having a melting point of about 150.degree. C. or more. A relay component formed of the above polyester resin composition has excellent vibration-damping and noise suppression properties.

Abstract: This invention is directed to an improved process for producing a polyester oligomer. The process employs a pipeline reactor, having at least two stages, in which the degree of polymerization of an oligomeric feed material is raised from about 2-10 to about 2-40 and the ratio of carboxyl to hydroxyl end groups in the product is reduced. In a first stage of the process, a monomeric diol or polyol, such as ethylene glycol, is added to a melt of the oligomeric feed material. In a second stage of the process, the molecular weight of the oligomer is increased by removal of volatile reaction by-products, including water and polyol. The oligomer produced by the present invention may be used in making higher molecular weight polyesters.

Abstract: Linear, tertiary carboxyl functional polyester resins suitable for the production of coatings having excellent outdoor durable properties, the polyester resins obtainable by reaction ofa) at least one aromatic and/or cycloaliphatic carboxylic acid compound A comprising two aromatic- and/or secondary aliphatic carboxyl groups or the anhydride thereof,b) at least one hydroxyl compound B comprising two aliphatic hydroxyl groups, which groups each independently may be primary or secondary hydroxyl groups,c) at least one hydroxyl substituted carboxylic acid compound C comprising at least one tertiary aliphatic carboxyl group and two aliphatic hydroxyl groups, which groups each independently may be primary or secondary hydroxyl groups, andd) optionally one carboxylic acid compound D comprising one carboxyl group, the molar ratio of compounds A:B:C:D being (X+Y-1):X:Y:Z,wherein X ranges from 2 to 8, Y ranges from 2 to 8, and Z ranges from 0 to 2.

Abstract: The invention relates to a process for increasing the molecular weight of polycondensates, which comprises heating a polycondensate in the temperature range below the melting point and above the glass transition temperature in the solid phase of the polymer with additionof at least one sterically hindered hydroxyphenylalkylphosphonic ester or monoester.

Abstract: At least bis-imido 1,3,5-triazines and processes of preparing the same are disclosed. Also disclosed are prepolymers having at least bis-imido functionality and curable compositions comprising at least bis-imido 1,3,5-triazines or prepolymers thereof in combination with active hydrogen and/or epoxy functional materials. The at least bis-imido 1,3,5-triazines and prepolymers may be advantageously employed as crosslinking agents which crosslink by a ring opening reaction that eliminates the release of volatile organic compounds.

Abstract: Disclosed herein is a liquid crystalline resin compound which includes about 100 pbw of liquid crystalline resin and about 5-200 pbw of inorganic filler, the liquid crystalline resin being composed of about 99.5-50 wt % of partially aromatic liquid crystalline polyester resin and about 0.5-50 wt % of wholly aromatic liquid crystalline polyester resin, and the inorganic filler having an average aspect ratio in the range of 3 to 25. Also disclosed is a molded article of liquid crystalline resin obtained by molding from the liquid crystalline resin compound. The resin compound is superior in flowability and the molded article has good mechanical properties, especially balanced rigidity and toughness.

Abstract: A low-cost way to modulate the reactivity and acid number of polyetherester thermoset resins is disclosed. "Beginning" and "end" methods for making dicyclopentadiene (DCPD)-modified polyetherester resins are described. The "beginning" method comprises first heating a polyether, DCPD, a diol, an insertion catalyst, and a carboxylic acid derivative to produce a mixture that contains the polyether and a DCPD-diol diester adduct. Increasing the temperature causes insertion of the DCPD-diol diester into the polyether to give a DCPD polyetherester resin. The "end" method reacts a polyetherester resin made by insertion with DCPD to give a DCPD polyetherester resin. Compared with DCPD polyester resins, those of the invention give more flexible thermosets. Compared with unmodified polyetherester resins, the DCPD polyetherester resins offer formulators more control over curing, which eliminates mold distortion and shrinking or cracking of thermoset parts.

Abstract: The present invention provides an amino curable polyester oligomer composition having low viscosity and a narrow molecular weight distribution comprising one or a mixture of oligomers (a) and (b): ##STR1## wherein R is the residue of at least one aliphatic, cycloaliphatic or mixed aliphatic/aromatic polycarboxylic-acid having from 2 to about 20 carbon atoms, R.sub.1 is the residue of at least one aliphatic, cycloaliphatic or mixed aliphatic/cycloaliphatic polyol having from 2 to about 20 carbon atoms, A is a radical of the formula: ##STR2## B is a radical of the formula: ##STR3## wherein R.sub.4 is H, OH, halogen or an organic radical containing 1 to 4 carbon atoms, R.sub.5 is a direct bond or an organic radical containing 1 to 20 carbon atoms and R.sub.6 is an organic radical containing 2 to 20 carbon atoms, n is a number averaging from greater than 0 up to less than 2 and p is a number averaging from about 0.

Abstract: Concentrates of dianhydrides of tetracarboxylic acids in polycarbonate resins containing up to about 50% by weight of dianhydride. The concentrates can be added to aromatic polyester resins in the melt in quantities equivalent to contents of dianhydride from 0.05 to 2% by weight of the resin.

Abstract: Amphiphilic polyesters containing(a) ester units derived from polyalkylene glycols having a molecular weight of from 500 to 7500 and aliphatic dicarboxylic acids and/or monohydroxymonocarboxylic acids and(b) ester units derived from aromatic dicarboxylic acids and polyhydric alcoholsand having molecular weights of from 1500 to 25,000,processes for preparing the amphiphilic polyesters by polycondensation, preparing first(a) aliphatic polyesters of polyalkylene glycols having a molecular weight of from 500 to 7500 with aliphatic dicarboxylic acids and/or monohydroxymonocarboxylic acids and then, within the aliphatic polyester thus obtained,(b) aromatic polyesters from aromatic dicarboxylic acids and polyhydric alcohols,reversing the order of the polycondensation, or condensing oligomeric aromatic polyesters (b) with oligomeric aliphatic polyesters (a), and use of the amphiphilic polyesters as additive in laundry detergents, other laundry detergent additives and laundry aftertreatments.

Abstract: Materials of formula (I) are provided, wherein X.sub.1 -X.sub.5 are independently selected from H, F, Cl, NO.sub.2, CF.sub.3, OR, R, SR, .paren open-st.CO-- or .paren open-st.CO-- where R is C.sub.1-15 branched or straight chain alkyl; provided that one of X.sub.1 -X.sub.5 is selected from .paren open-st.CO-- or .paren open-st.OC--; p is at least 2; W=single bond, phenyl, fluorinated phenyl, .dbd., .tbd., cyclohexyl, thiophene, CO, OC; T.sub.1, T.sub.2, T.sub.3, T.sub.4 are independently selected from H, F, Cl, NO.sub.2, CF.sub.3, OR, R, SR, where R is C.sub.1-15 branched or straight chain alkyl; g=0 or 1; X is selected from CO.sub.2 and OOC; n is selected from 1-5; m is selected from 1-20, Y is selected from O, S, CH.sub.2, CO.sub.2, OOC; Q is CH.sub.2 and when m is greater than 1 then non-adjacent CH.sub.

Abstract: Disclosed herein is a novel crystalline form of low molecular weight poly(trimethylene terephthalate). This crystalline form may be produced from molten or glassy low molecular weight poly(trimethylene terephthalate) material by means of rapid heat transfer to or from the material. The poly(trimethylene terephthalate) composition is suitable for use as a starting material for solid-state polymerization in order to produce polymers of higher molecular weight.

Abstract: Biodegradable polymer blends comprising of a polylactic acid or a copolymer containing lactic acid as the main constituent, and a polyhydroxyalkanoate or a copolymer containing two or more hydroxyalkanoic acids as the constituents; methods for controlling the rate of biodegradation of a polylactic acid or a copolymer containing lactic acid as the main constituent, by blending as above; methods for manufacturing such aliphatic polyester polymer blends; and methods for molding such polymer blends; are provided.The aliphatic polyester polymer blends obtained in the invention are colorless and clear, and have excellent biodegradabilities, as well as excellent mechanical strengths. The blends can be molded similarly as in conventional thermoplastic resins, so that they can be utilized in many industries, without problems in the waste product treatment after the use. Furthermore, molded products with excellent qualities are obtained from the blends, because of their improved moldabilities.

Abstract: This invention is a thermoplastic saturated polyester low profile additive (low profile additive) useful in sheet molding compounds for parts, especially vehicle parts. The additive has a major component derived from aromatic compounds such as terephthalic acid including recycled polyethylene terephthalate. Asymmetrical glycols are an important ingredient and can be used to digest recycled PET to make oligomeric glycols which are reacted with acids having fewer than 12 carbon atoms to make one of the low profile additives of this invention.

Abstract: A composition comprising (A) a monovinylarene/conjugated diene block copolymer, (B) an amorphous poly(ethylene terephthalate), and (C) a crystalline poly(ethylene terephthalate). A process for preparing the composition and articles manufactured from the composition are also provided.

Abstract: A biaxially oriented polyester film is suitable for laminating onto a metallic sheet so as to provide a laminate capable of being formed into a can. The polyester film comprises at least one of:(1) a polyester having a melting point of 246.degree. to 280.degree. C. and being such that when the laminate is formed into a can, then at a neck of the can the film provides an inner 1 to 3 .mu.m portion (a) close to the metallic sheet and an outer 1-3 .mu.m portion (b) remote from the metallic sheet, which said portions (a) and (b) have respective average orientation intensity ratios, as measured by Raman spectrometry, of 6 or less and 8 or more; and(2) a polyester layer (A) of a polyester having at least 93 mol % thereof of units derived from ethylene terephthalate and/or ethylene naphthalate and a polyester layer (B) of a polyester containing an ionomer and which film has a face orientation factor of 0.10 to.0.15.

Abstract: 1. An ester copolymer resin having a general formula ?I!. ##STR1## wherein Ar represents 2,6-naphthalene group or phenylene group, R represents ethylene group or 1,4-cyclohexylene group, and n is a number of 100 to 1000 and a polymer alloy having a solubility parameter of 10.8 to 11.9 consisting essentialy of the ester copolymer and a polycarbonate resin are provided. The ester resin and the alloy are transparent and has a beat resistance and a hot water resistance (resistance to whitening) resisting sterilization of food, a good heat sealability to aluminum closure, and recycling ability with PET resin.

Abstract: A combination of polymeric components provides desired characteristics in forming medical instruments such as catheters and balloons for dilatation catheters. For example, a balloon material is formed from a blend of polymeric components, including a first crystalline polymeric component and a second softening polymeric component. Where the first two components are generally incompatible, the balloon material can also include a third compatibilizing agent to facilitate blending the first two polymeric components together. The first polymeric component can be a branched or straight chain polyamide having a molecular weight of at least about 5000, or a polyester prepared from aromatic dicarboxylic acids having 8 to 14 carbon atoms or aliphatic dicarboxylic acids having from 2 to 12 carbon atoms, and at least one glycol having the formula HO(CH.sub.2).sub.n OH, where n is an integer from 2 to 10, neopentyl glycol and cyclohexane dimethanol.

Abstract: Liquid-crystalline polymer blends comprising two or more cholesteric liquid-crystalline polymers or at least one nematic liquid-crystalline polymer and at least one cholesteric liquid-crystalline polymer.All hues can be produced specifically and in a reproducible manner by variation in the blend components and in the mixing ratio. The polymer blends are suitable as materials or as effect pigments.

Abstract: An increase in the molecular weight of polyester and recycled polyester can be achieved by blending said polyester with a difunctional epoxy resin and a sterically hindered hydroxyphenylalkylphosphonic acid ester or half-ester and heating the blend to above the melting point (glass transition temperature) of the polyester.

Abstract: A process is disclosed for the crystallization of a PEN prepolymer containing volatile components. The temperature is maintained in the range of about 20.degree. C. above the Tg and about 10.degree. C. below the Tm while the PEN prepolymer is agitated. The PEN prepolymer is present as chips or pellets. The crystallization is performed in the presence of a liquid or a mixture of liquids that do not degrade the polymer during crystallization. The liquid or liquids employed may be those whose vapor pressure at the amorphous PEN softening temperature are insufficient to forestall expansion of the pellets. When this class of liquid or liquids is employed, the crystallization vessel is pressurized with an inert gas, including air, to prevent the prepolymer expansion. If the liquid or liquids possess sufficiently high vapor pressures at the PEN softening temperature, the pellets do not expand even without the inert air pressurization.

Abstract: A heat-curable, epoxy-free coating composition comprises a dry blend of at least two different binder resins, each binder resin comprising of (a) a carboxyl-terminated polyester resin having an acid value from 20 to 200 mg KOH/g and a glass transition temperature of at least 40.degree. C., and (b) a .beta.-hydroxylalkylamide with at least two .beta.-hydroxylalkylamide groups per molecule; the at least two different binder resins differing in functionality, or in other words in the number of carboxyl and/or .beta.-hydroxylalkylamide groups per binder resin molecule. Along with the binder resins, the coating composition optionally includes further additives that are typical for the processing and use of powder coatings.

Abstract: A fluid which comprises an olefin-terminated polyester an unmodified polyester and a polymerized .alpha.-olefin is provided which facilitates the separation of blood into light and heavy phases via centrifugation in a blood collection vessel. The fluid is useful as a component of a partitioning composition formulated to have appropriate specific gravity to be positioned intermediate the light and heavy blood phases during centrifugation. A partitioning composition including a fluid of the invention provides a particular advantage in blood collection vessels used in therapeutic drug monitoring, due to the relatively low affinity between the fluid component of the composition and commonly monitored classes of drugs.

Abstract: A thermosetting powder paint coating containing a polymeric binder comprising a polyester graft acrylic copolymer and a low molecular weight crystalline polyester. The coatings can be pigmented or non-pigmented. The polyester-graft-acrylic copolymer can be self-crosslinking by the inclusion of beta-hydroxy ester groups or crosslinked by an external crosslinker.

Abstract: A polyester resin (A) having branched chain, a reduction viscosity (.eta. sp/c) of not less than 0.7, and a Z average molecular weight (Mz) relative to standard polystyrene of not less than 250.times.10.sup.3 and not more than 800.times.10.sup.3, a polyester resin composition comprised of resin (A) and a polyester resin (B) without branched chain and having a reduction viscosity (.eta. sp/c) of not less than 0.7., and a polyester resin composition comprised of resin (A) and a polyester resin (C) having branched chain and a melting point lower than that of the polyester resin (A). The sealant made from the polyester resin (A), or the resin compositions of the present invention is superior in heat-sealing properties, flavor retention, and film moldability (extrusion processing characteristics), and is suitable for a sealant for paper and plastic food containers.