Abstract: This invention relates to aliphatic-aromatic copolyesters that can exhibit improved tear strength and improved rate of biodegradation. Particularly to an aliphatic-aromatic copolyester having a dicarboxylic acid component and a glycol component. The invention also relates to articles and blends using the copolyesters.

Abstract: The polymerization processes described herein provide methods for dehydrating diols such that dimers of the diols are formed and incorporated into polyesters during polycondensation. Control over this phenomenon provides unique polymer compositions with a range of thermo-mechanical properties, crystallinity, bio-content and biodegradability. Generation of a wide range of properties allows development of polymers that can be used for a wide range of applications.

Abstract: Unsaturated polyester compositions are disclosed that are obtainable by reacting: (i) plant and animal oil triglycerides, an alkyl ester of a saturated or unsaturated fatty acid or mixtures thereof; (ii) a difunctional, or polyfunctional glycol or mixtures thereof; (iii) a difunctional or polyfunctional acid, their anhydrides or alkyl esters and mixtures thereof; (iv) a strained cycloolefin; (v) a component(s) that function as a compound capable of initiating polymerization at high temperature and which is stable at room temperature; and (vi) low profile additives, fillers, and reinforcements. Also disclosed are methods for the preparation of the polyesters and the use of the polyesters in closed and open mold compositions such as sheet molding compound (SMC), bulk molding compounding (BMC), resin transfer molding (RTM), pultrusion, infusion, filament winding, and spray up.

Abstract: A process for preparing modified polymer by withdrawing a slip stream of polymer melt from the discharge line of a continuous polymerization reactor, admixing in a highly modified polymeric additive into the polymer melt within the slip stream, then introducing the modifier containing slip stream late in the manufacturing process prior to the slip stream withdrawal point. The improved processes of the invention have particular utility for large-scale, continuous reactor where transitions and short production runs are economically prohibitive thereby limiting the product breath. The process is particularly suited for producing a family of copolyesters using a continuous melt phase production process.

Abstract: A process comprises depolymerizing, with 1,4-butane diol, a first polymer comprising a polyethylene terephthalate component in the presence of at least one second polymer selected from the group consisting of polyvinyl chlorides, polyvinylidene chlorides, polyamides, polylactic acid, and combinations thereof to produce a molten mixture; and polymerizing the molten mixture under conditions sufficient to form a modified polybutylene terephthalate copolymer. The modified PBT comprises (a) at least one polyethylene terephthalate component residue, and (b) a member selected from the group consisting of (i) the at least one second polymer selected from the group consisting of polyvinyl chlorides, polyvinylidene chlorides, polyamides, polylactic acid, and combinations thereof; (ii) the at least one residue derived from the second polymer; and (iii) combinations thereof.

Abstract: A bioderived plasticizer for biopolymers includes a compatibilizing unit and a polyester plasticizing unit. The plasticizer improves the flexibility of biopolymers while not adversely affecting their modulus. The compatibilizing unit renders the plasticizer more miscible with the desired base biopolymer and includes a lower alkyl (C3 to C7) organic acid. The polyester plasticizing unit is formed from monomers comprising a multifunctional alcohol and an aliphatic anhydride or its equivalent dicarboxylic acid and ester derivatives. The polyester plasticizing unit may optionally include one or more difunctional alcohols in combination with the multifunctional alcohol. The resulting the bioderived plasticizer has a low glass transition temperature (Tg), preferably between ?20° C. to 30° C. The plasticizer is preferably amorphous.

Abstract: A process for preparing modified polymer by withdrawing a slip stream of polymer melt from the discharge line of a continuous polymerization reactor, admixing in a highly modified polymeric additive into the polymer melt within the slip stream, then introducing the modifier containing slip stream late in the manufacturing process prior to the slip stream withdrawal point. The improved processes of the invention have particular utility for large-scale, continuous reactor where transitions and short production runs are economically prohibitive thereby limiting the product breath. The process is particularly suited for producing a family of copolyesters using a continuous melt phase production process.

Abstract: Ultraviolet light stabilized copolyetherester compositions that comprise at least one nanoparticulate mineral selected from titanium dioxide, cerium oxide, and zinc oxide and at least one organic ultraviolet light stabilizer. Articles formed from the compositions are also disclosed.

Abstract: Aqueous resinous binders comprising graft copolymers, water-dilutable urethane polyols and epoxy-phosphorus acid reaction products are disclosed. The binders are useful in primer formulations for automotive applications.

Abstract: Aqueous resinous binders comprising graft copolymers, water-dilutable urethane polyols, epoxy-phosphorus acid reaction products, and an aqueous dispersion comprising the reaction product of trimellitic anhydride and a polyol, wherein the molar ratio of trimellitic anhydride to the polyol in the reaction product ranges from 1:2 to 1:4, and wherein the reaction product is further reacted with an anhydride to form another reaction product are disclosed. The binders are useful in primer formulations for automotive applications.

Abstract: Modified copolyesters having relatively low refractive indices and relatively high glass transition temperatures are disclosed. These modified copolyesters can be used in forming one or more layers in an optical film, such as a multilayer polymer film.

Abstract: Biodegradable polymer blends suitable for laminate coatings, wraps and other packaging materials are manufactured from at least one “hard” biopolymer and at least one “soft” biopolymer. “Hard” biopolymers tend to be more brittle and rigid and typically have a glass transition temperature greater than about 10° C. “Soft” biopolymers tend to be more flexible and pliable and typically have a glass transition temperature less than about 0° C. While hard and soft polymers each possess certain intrinsic benefits, certain blends of hard and soft polymers have been discovered which possess synergistic properties superior to those of either hard or soft polymers by themselves. Biodegradable polymers include polyesters, polyesteramides, polyesterurethanes, thermoplastic starch, and other natural polymers. The polymer blends may optionally include an inorganic filler. Films and sheets made from the polymer blends may be textured so as to increase the bulk hand feel.

Abstract: Biodegradable polymer blends suitable for laminate coatings, wraps and other packaging materials are manufactured from a blend of suitable biodegradable polymers, such as at least one “hard” biopolymer and at least one “soft” biopolymer. “Hard” biopolymers tend to be more brittle and rigid and typically have a glass transition temperature greater than about 10° C. “Soft” biopolymers tend to be more flexible and pliable and typically have a glass transition temperature less than about 0° C. While hard and soft polymers each possess certain intrinsic benefits, certain blends of hard and soft polymers have been discovered which possess synergistic properties superior to those of either hard or soft polymers by themselves. Biodegradable polymers include polyesters, polyesteramides, polyesterurethanes, thermoplastic starch, and other natural polymers. The polymer blends may optionally include an inorganic filler. Films and sheets made from the polymer blends may be textured so as to increase the bulk hand feel.

Abstract: An antistatic composition containing various types of polymers such as a polyamide, an aliphatic polyester, an elastomer thereof and a polyurethane elastomer, and a metal salt in specific amounts, and preferably, an antistatic composition in which an additive component such as an organic compound which has an —{O(AO)n}— group (A represents an alkylene group having 2 to 4 carbon atoms, and n represents an integer of 1 to 7) and all molecular chain terminals of which are CH3 and/or CH2 groups is compounded as needed.

Abstract: Disclosed is a method of producing a powdery coating material by using: a curable polyester resin (A) having a hydroxyl group and/or a carboxyl group at the terminals thereof, and further having a number average molecular weight of from 1,000 to 30,000, a glass transition temperature of from 30 to 100° C.; a curing agent (B) which is solid at normal temperature and is capable of being reacted with the hydroxyl group or the carboxyl group of the curable polyester resin (A); and a solvent (C) having a boiling point under normal pressure of from 50 to 130° C.; and comprising a step of kneading the curable polyester resin (A), the curing agent (B) and the solvent (C) under condition in which at 50 to 130° C., not less than 20% by weight of the curing agent (B) is dissolved in the solvent and, then, vapor-removing the solvent (C) under a reduced pressure.

Abstract: In order to provide a polyester film having superior impact resistance and flex pinhole resistance, and further exhibiting superior gas barrier properties after a metal or metal oxide is deposited on the film, with the inherent characteristics of polyester film maintained, such as low hygroscopicity, dimensional stability, flatness, and transparency, the polyester film comprises a mixture of 70% to 97% by weight of polyester A mainly composed of a repeating unit comprising ethylene terephthalate and 3% to 30% by weight of polyester B mainly composed of a repeating unit comprising butylene terephthalate. The polyester film has a melting point in range of 245 to 270° C. The polyester film may comprise a polyester resin containing 90% to 60% by weight of an ethylene terephthalate component, 10% to 40% by weight of a butylene terephthalate component, and 0.1% to 5% by weight of a polyoxyalkylene glycol component. The polyester film is suitably used for packaging and other applications.

Abstract: Polyester resin composition (C) comprises polyester resin (A), which comprises polyester resin (l) comprising a diol unit having a cyclic acetal structure (CA) and a dicarboxylic acid unit having no CA, polyester resin (m) comprising a dicarboxylic acid unit having CA and a diol unit having no CA and/or polyester resin (n) comprising a diol unit having CA and a dicarboxylic acid unit having CA, and polyester resin (B) having no CA. The sum of the fraction of the dicarboxylic acid unit having CA in the entire dicarboxylic acid unit and the fraction of the diol unit having CA in the entire diol unit in composition (C) is 0.05% by mole or greater. The polyester resin compositions are excellent in transparency, melt viscoelasticity, heat resistance and moldability, and exhibit a samll crystallization rate.

Abstract: The present invention provides a resin composition comprising a vinyl polymer (A) having, at a side chain thereof, at least one structure selected from polyether, polyester, polycarbonate or polybutadiene which has a functional group that can react with an isocyanate group, and a polyisocyanate compound (B) having at least two isocyanate groups; a sheet made of a hardened body of the resin composition; a shaped body formed by shaping the sheet; and a sheet producing process comprising the steps of applying the resin composition and then hardening the resultant layer.

Abstract: The invention relates to a thermosetting coating mass, comprising a carboxyl functional polyester, and/or a carboxyl functional polyacrylate, a ?-hydroxyalkylamide, in which a portion of the hydroxyl groups are chemically blocked and/or fillers and/or heat stabilisers and/or triboadditives and/or further additives, such as, for example, dispersing and degassing agents.

Abstract: A process for the manufacture of glycidylester compositions by (a) reacting: (i) at least one cyclohexyl anhydride compound A; (ii) at least one di-secondary or di-primary hydroxyl compound B containing two (cyclo)aliphatic hydroxyl groups; (iii), at least one di-secondary carboxylic acid or anhydride compound C; and (iv) a mono-glycidyl ester of an ?,?-branched carboxylic acid compound D containing from 5 to 19 carbon atoms; and (b) reacting the carboxyl functional polyester from step (a) with an excess epihalohydrin in the presence of a base.

Abstract: The invention relates to biaxially oriented, co-extruded polyester films. Said films comprise a base layer which consists of at least 70% by weight of a thermoplastic polyester, preferably polyethylene terephthalate (PET) with a diethylene glycol and/or polyethylene glycol content greater than 1.3% by weight and have at least one matt outer layer and optionally additional intermediate layers. The films also contain at least one UV-absorber, preferably hydroxy benzotriazoles and triazines. The films are characterized by high UV-stability, no embrittlement after exposure to temperature, a matt surface devoid of unwanted clouding and excellent thermoforming properties and are, together with the molded bodies produced therefrom, suitable for numerous interior and exterior applications.

Abstract: The invention relates to a co-extruded, biaxially oriented polyester films containing a flame-retardant agent which can be dissolved in the polyester. The film has a matt outer layer which contains a mixture and/or a blend of two components (I) and (II), whereby component (I) is a polyethylene terephthalate homopolymer, or a polyethylene terephthalate copolymer, or a mixture of polyethylene terephthalate homopolymers or copolymers and component (II) is a polymer containing at least one sulphonate group.

Abstract: The present invention is directed to medical devices or pharmaceutical composition, each containing a synthetic, biodegradable, biocompatible polymer that is the reaction product of a polybasic acid or derivative thereof, a monoglyceride, and a cationic polyol.

Abstract: Provided is a laminated polyester film, in which a laminated layer comprising two types of polyester resins having different glass transition points from each other is formed on at least one side of a base polyester film wherein the two types of polyester resins are composed of a polyester resin (A) having a glass transition point of from 60° C. to 100° C., and a polyester resin (B) having a glass transition point of from 0° C. to 60° C. and the polyester resin (B) contains a specified component, and a dicarboxylic acid component having a sulfonic acid metal base is set as a specified ratio of the entire dicarboxylic acid components in the polyester resins (A) and (B), satisfies adhesiveness to various types of coating materials which has conventionally been incompatible and, further, satisfies anti-blocking properties, transparency, scratch resistance and the other properties.

Abstract: Disclosed is a method of producing a powdery coating material by using: a curable polyester resin (A) having a hydroxyl group and/or a carboxyl group at the terminals thereof, and further having a number average molecular weight of from 1,000 to 30,000, a glass transition temperature of from 30 to 100° C.; a curing agent (B) which is solid at normal temperature and is capable of being reacted with the hydroxyl group or the carboxyl group of the curable polyester resin (A); and a solvent (C) having a boiling point under normal pressure of from 50 to 130° C.; and comprising a step of kneading the curable polyester resin (A), the curing agent (B) and the solvent (C) under condition in which at 50 to 130° C., not less than 20% by weight of the curing agent (B) is dissolved in the solvent and, then, vapor-removing the solvent (C) under a reduced pressure.

Abstract: A composition comprises a curing agent or coreactant and a glycidyl ester produced by reacting a carboxyl-functional polyester having an acid value of less than 280 mg KOH/gram with excess epihaloydrin in the presence of a base and, optionally, a catalyst, wherein the carboxyl-functional polyester is produced by reacting (a) at least on cyclohexyl anhydride A; (b) at least one di-secondary or di-primary hydroxyl compound B containing two (cyclo)aliphatic hydroxyl groups; (c) at least one di-secondary carboxylic acid or anhydride C; and (d) a monoglycidyl ester of an alpha,alpha-branched carboxylic acid D containing from 5 to 19 carbon atoms.

Abstract: The invention relates to a process for preparing a high-molecular polyamide or polyester by melt-mixing polyamide or polyester having a lower molecular weight with a carbonyl bislactam having formula 1, in which n=an integer of between 3 and 15. With the process according to the invention a permanent increase in the molecular weight of a polyamide is obtained within 2 minutes, whereas this takes at least 10 minutes under comparable conditions using a bislactam according to the state of the art.

Abstract: The invention concerns a polyester bearing tertiary carboxyl groups, characterised in that it consists of: (a) 8.1 to 35 moles of an aliphatic or cycloaliphatic of a polyol; (b) 9.1 to 36 moles of an aliphatic, cycloaliphatic or aromatic polycarboxylic acid; (c) 1.6 to 2.8 moles of an aliphatic, cycloaliphatic or aromatic compound comprising a tertiary carboxyl group and either a primary or secondary carboxyl group, or a primary or secondary hydroxyl group. Said polyester is prepared in several steps, the first steps consisting in the preparation of a polyester by condensation between (a) an aliphatic or cycloaliphatic polyol, and (b) an aliphatic, cycloaliphatic or aromatic polycarboxylic acid, the final step consisting in condensing said polyester with (c) an aliphatic, cycloaliphatic or aromatic compound comprising a tertiary carboxyl group and either a primary or secondary carboxyl group, or a primary or secondary hydroxyl group.

Abstract: A polyester composition comprising (A) 30 to 95 parts by weight of a polybutylene terephthalate resin containing a polybutylene terephthalate-isophthalate copolymer in which the content of an isophthalic acid ingredient to the entire dicarboxylic acid ingredient is 5 to 20 mol %, (B) 1 to 30 parts by weight of a polycarbonate resin, (C) 3 to 20 parts by weight of an elastomer and (D) 15 to 30 parts by weight of a fibrous reinforcing material, and (E) 0.1 to 3 parts by weight of a silicone compound, wherein the total amount for (A)-(D) is 100 parts by weight, the composition being used for insert molding.

Abstract: The invention relates to a matt, biaxially oriented polyester film having at least one matt base layer (B) which comprises at least 70% by weight of thermoplastic polyester, and also a pigment system with narrow grain size distribution. The invention further relates to the use of the film and to a process for its production. The film of the invention has characteristic matt surfaces and has good suitability for use as a packaging film or for industrial applications.

Abstract: The invention relates to a biaxially oriented polyester film having at least one matt side and composed of at least one base layer (B) and of, applied to this base layer, at least one matt outer layer (A) which comprises at least 70% by weight of thermoplastic polyester and also to a pigment system with narrow grain size distribution. The invention further relates to the use of the film and to a process for its production. The film of the invention with the outer layer (A) has a characteristic matt surface and characteristic optical properties and has good suitability for use as a packaging film or for industrial applications.

Abstract: A compositional blend of from about 50 to about 99 weight percent of a polyester and from about 1 to about 50 weight percent of an essentially, linear, random aliphatic-aromatic copolyester or branched and/or chain extended copolyester thereof is useful as a heat-shrinkable film.

Abstract: There is described a novel blend composition comprising specified amounts of any polycarbonate and specified amounts of a specific copolyester comprising terephthalic acid, naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, or mixtures thereof; isophthalic acid; and 1,4-cyclohexanedimethanol. Also described are films and sheets produced from the novel blend compositions that are thermoformable without having to pre-dry the films and sheets. Further, articles of manufacture produced from the novel blend compositions are described.

Abstract: The present invention relates to a curing type water base resin composition comprising: (I) a copolymer obtained by copolymerizing an ethylenically unsaturated monomer (a) having a maleimide group, an ethylenically unsaturated monomer (b) having a carbonyl group and other ethylenically unsaturated monomer (c) and (II) a compound having two or more groups per molecule which are the same or different and selected from a hydrazide group, a semicarbazide group and hydrazone group and further comprising, if necessary, as an additional component: (III) a copolymer having a carbonyl group and/or (IV) a water base polyurethane resin having a carbonyl group or a hydrazine group.

Abstract: A glycidylester is produced by reacting a carboxyl-functional polyester compound having an acid value of less than 280 mgKOH/gram with excess epihalohydrin in the presence of a base and, optionally, a catalyst, wherein the carboxyl functional polyester resins are produced by reacting:

Abstract: An end capped polyester ionomer composition comprising alkylene aryl polyester copolymer metal sulfonate units with end capping units formed by a reaction of the polyester copolymer with an epoxy compound having at least one cyclohexane ring moiety and a terminal epoxy functional group being a substituent on at least one cyclohexane ring moiety.

Abstract: The invention concerns a polyester bearing tertiary carboxyl groups, characterised in that it consists of: (a) 8.1 to 35 moles of an aliphatic or cycloaliphatic of a polyol; (b) 9.1 to 36 moles of an aliphatic, cycloaliphatic or aromatic polycarboxylic acid; (c) 1.6 to 2.8 moles of an aliphatic, cycloaliphatic or aromatic compound comprising a tertiary carboxyl group and either a primary or secondary carboxyl group, or a primary or secondary hydroxyl group. Said polyester is prepared in several steps, the first steps consisting in the preparation of a polyester by condensation between (a) an aliphatic or cycloaliphatic polyol, and (b) an aliphatic, cycloaliphatic or aromatic polycarboxylic acid, the final step consisting in condensing said polyester with (c) an aliphatic, cycloaliphatic or aromatic compound comprising a tertiary carboxyl group and either a primary or secondary carboxyl group, or a primary or secondary hydroxyl group.

Abstract: A glycidyl ester is produced by reacting a carboxyl-functional polyester having an acid value of less than 280 mg KOH/gram with excess epihalohydrin in the presence of a base and, optionally, a catalyst, wherein the carboxyl-functional polyester is produced by reacting (a) at least one cyclohexyl anhydride A; (b) at least one compound B containing two (cyclo)aliphatic hydroxyl groups which is a di-secondary or di-primary hydroxyl compound, and if C is present, monoepoxide D which is a monoglycidyl ester of an &agr;,&agr;-branched, C5-C19 carboxylic acid; and, optionally, (c) at least one di-secondary carboxylic acid or anhydride C.

Abstract: A water-sensitive hot melt adhesive composition based on sulfonated branched copolyester polymers for use with articles such as paper products, disposable nonwoven products, tapes, labels and packaging materials. The adhesive composition includes about 10% to about 90%, by weight, of a sulfonated polyester copolymer or a blend of one or more sulfonated polyester polymers; about 0% to about 80%, by weight, of a tackifying resin; about 0% to about 40%, by weight, of a compatible plasticizer; about 5% to about 50% by weight of a polyethylene glycol having a molecular weight greater than 2000 and a melting point greater than 50° C; and about 0% to about 3% by weight of one or more antioxidant. The adhesive maintains the article in an assembled condition by providing adequate adhesive bond strength during normal use, but dissolves in the presence of water thereby permitting the article to be recycled or otherwise disposed of in an environmentally friendly manner.

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: A (powder) coating composition comprises an epoxy-functional polyester storage-stable at temperatures of up to 40° C. and having a Tg of more than 40° C. and a crosslinking resin, wherein the epoxy-functional polyester is prepared by the reaction of (III) an intermediate epoxy-functional polyester produced by glycidating a carboxyl-functional polyester derived from (a) secondary carboxyl groups-containing aromatic or cycloaliphatic dicarboxylic acid (anhydride)(s), (b) aliphatic hydroxyl groups-containing diol(s), (c) optionally, a compound containing one primary or secondary hydroxyl group, or a compound comprising one primary or secondary hydroxyl group and one tertiary aliphatic carboxyl group, (d) optionally, a compound comprising a tertiary aliphatic carboxyl group and two aliphatic hydroxyl groups and (e) optionally, a trihydroxyalkane or tetrahydroxyalkane; with (IV) a carboxyl-functional polyester obtained from (a) and (b) above, or (a) alone.

Abstract: A heat settable, coating system of carboxyl-functional polyester resins, polyfunctional epoxy compounds and/or &bgr;-hydroxy alkyl amides, as well as further customary additives, if required. The coating system contains at least one linear carboxyl-functional polyester resin of up to 10 mol-part of isophthalic acid and at least 90 mol-parts of at least a further dicarboxylic acid from the group of aromatic dicarboxylic acids with 8 to 16 C-atoms, aliphatic dicarboxylic acids with 6 to 22 C-atoms and cycloaliphatic dicarboxylic acids with 8 to 16 C-atoms, and at least 90 mol-parts of at least one branched aliphatic diol with 4 to 12 C-atoms, and up to 50 mol-parts of at least one linear aliphatic diol with 2 to 22 C-atoms and/or at least one cycloaliphatic diol with 6 to 16 C-atoms as the binder resin.

Abstract: Coatings are provided with very low surface energies provided by fluorine and/or silicone moieties. Aqueous dispersions of externally chain extended polyurethane compositions terminated by hydrolyzable and/or hydrolyzed silyl groups and containing dispersing or emulsifying groups, particularly carboxyl groups are provided. Also polyurethane dispersions which are substantially organic solvent free which cure to water and solvent resistant, tough, scratch resistant, preferably light stable polyurethane films are provided. Such films are useful as anti-fouling marine coatings. The compound RfR′fCFCOOCH2C(R)(CH2OH)2 is provided.

Abstract: The invention provides an alkali-soluble adhesive agent characterized by comprising an alkali-soluble resin that is a reaction product (C) obtained by allowing a polycarboxylic acid and/or a polycarboxylic anhydride having two or more carboxyl groups to react with a reaction product of a compound (A) having at least one epoxy group with a monocarboxylic acid compound (B). Preferably, the alkali-soluble resin is used in combination with a ketone organic solvent, optionally with at least one member selected from the group consisting of a melt viscosity reducing agent, a surface active agent and a plasticizer. The alkali-soluble adhesive agent can be removed by an alkali aqueous solution without recourse to any organic solvent, and is of an environmental protection-conscious type with improvements in adhesion, adhesion strength, coatability, surface smoothness, softening point controllability, melt viscosity controllability and spread controllability.

Abstract: This invention relates to polyester compositions that possess improved gas barrier properties. The novel copolyester blends comprise repeat units of phenylenedi(oxyacetic acid). Such copolyesters with improved gas barrier properties are useful in packaging applications where low gas permeability are required for protection or preservation of the contents.

Abstract: Linear, tertiary carboxyl functional polyester resins are obtained by reaction of (a) at least one 1,4-dicarboxylcyclohexane (A), optionally mixed with a minor weight fraction of an alkane dicarboxylic acid containing in the range of from 8 to 16 carbons atoms (A′), (b) at least one dihydroxymonocarboxylic acid compound (B) containing a tertiary aliphatic carboxyl group and two aliphatic hydroxyl groups, (c) optionally, one diol compound (C) containing two aliphatic hydroxyl groups, each independently being a primary or a secondary hydroxyl group, and (d) optionally, a compound (D′) containing one monofunctional primary or secondary hydroxyl group and/or a compound (D″) containing one primary or secondary hydroxyl group and one tertiary aliphatic carboxyl group, the molar ratio of the compounds (A+A′):B:C:D′:D″ being X+Y+1:Y:X:M:N wherein M+N is in the range of from 0 to 2, wherein X ranges from 2 to 8, and Y ranges from [2−(M+N)&rsq

Abstract: A thermosetting powder coating composition according to the present invention comprises as binder a co-reactable particulate mixture of a carboxylic acid-functional polyester component and a curing agent having groups reactive with carboxylic acid groups, characterized in that the carboxylic acid-functional component comprises a semi-crystalline polyester having an acid value of from 10 to 70 mg KOH/g and a hydroxy value of no more than 11 mg KOH/g. Generally the semi-crystalline polyester has one or more Tg values less than 55° C., a sharp melting point of 50 to 200° C. and preferably a number average molecular weight of at least 1600. The composition may, if desired, include an amorphous polyester and the curing agent may be, for example, an epoxy resin or a bis(beta-hydroxyalkylamide).

Abstract: The powder coating for use in a coating method which includes the steps of mixing and applying two or more powder coatings to a substrate, the powder coating comprising a resin not having thermosetting properties at a temperature of 160.degree. C. or less by itself, and being heat-cured at a temperature of 160.degree. C. or less when used in combination with other powder coatings. The powder coating composition comprising two or more powder coatings, wherein each of the powder coatings comprises a resin not having thermosetting properties at a temperature of 160.degree. C. or less by itself, and being heat-cured at a temperature of 160.degree. C. or less to form a coating film when used in combination with other powder coatings.

Abstract: An epoxy-functional polyester storage-stable at temperatures of up to 40.degree. C. and having a Tg of more than 40.degree. C. is prepared by the reaction of an epoxy-functional polyester intermediate (III) produced by glycidating a carboxyl-functional polyester derived from (a) at least one secondary carboxyl groups-containing aromatic or cycloaliphatic dicarboxylic acid (anhydride), (b) at least one aliphatic hydroxyl groups-containing diol, (c) optionally, a compound containing one primary or secondary hydroxyl group, or a compound comprising one primary or secondary hydroxyl group and one tertiary aliphatic carboxyl group, (d) optionally, a compound comprising a tertiary aliphatic carboxyl group and two aliphatic hydroxyl groups and (e) optionally, a trihydroxyalkane or tetrahydroxyalkane; with (IV) a carboxyl-functional polyester obtained from (a) and (b) above, or (a) alone.

Abstract: A partially or fully cured thermosetting product which includes a cured and molded product of a thermosetting composition. The composition includes 70% to 99% by weight of at least one thermosetting resin or compound and 1% to 30% by weight of at least one toughening agent. The toughening agent is at least one hyperbranched dendritic macromolecule formed of ester units, optionally in combination with ether units.