Abstract: A terpolymer composition is described that contains a statistical amount of 50-98 wt % of a first repeating AA-BB comonomer unit; 1-25 wt % of a second repeating AA-BB comonomer unit; and 1-25 wt % of a repeating lactam comonomer unit or 1-25 wt % of a third repeating AA-BB comonomer unit, where the terpolymer composition exhibits a high melting point similar to that of PA66 while also exhibiting a significantly reduced crystallization rate and crystallization temperature.

Abstract: Provided is an amorphous polyamide resin that has a small weight change rate under hot and humid conditions and that can maintain a good appearance even when formed into a molded article and placed under hot and humid conditions. Also provided is a molded article including the amorphous polyamide resin. An amorphous polyamide resin includes: constituent units derived from a diamine and constituent units derived from a dicarboxylic acid, not less than 70 mol % of the constituent units derived from a diamine being constituent units derived from isophoronediamine, the constituent units derived from a dicarboxylic acid including constituent units derived from an ?,?-straight chain aliphatic dicarboxylic acid having from 8 to 14 carbons and constituent units derived from an aromatic dicarboxylic acid.

Abstract: The invention relates to a composition for thermoplastic composite material comprising: 30% to 60% by volume, preferentially 35% to 50% by volume, of a thermoplastic matrix comprising from 50% to 100% by weight of a semi-crystalline polyamide polymer and from 0% to 50% by weight of at least one additive and/or of at least one other polymer, 40% to 70% by volume, preferentially 50% to 65% by volume, of long reinforcing fibers (or of long fibrous reinforcement), said thermoplastic matrix impregnating said long reinforcing fibers (or said long fibrous reinforcement), said semi-crystalline polyamide polymer being a nonreactive composition of at least one polyamide polymer, said composition being that of said thermoplastic matrix defined above, and said reactive polyamide prepolymer of the composition a) and said polyamide polymer of the composition b) comprising or consisting of at least one BACT/XT copolyamide.

Abstract: A method of making a polyamide copolymer includes subjecting a reaction mixture to conditions sufficient to form the polyamide copolymer, the reaction mixture including adduct A and adduct B. Adduct A is a 1:1 adduct of a diamine having the structure H2N-R1-NH2, or a salt thereof and an aliphatic diacid having the structure HO—C(O)—R2-C(O)—OH, or a salt thereof. Adduct B is a 1:1 adduct of the diamine having the structure H2N-R1-NH2, or a salt thereof, and an aromatic diacid having the structure HO—C(O)—R3-C(O)—OH, or a salt thereof. At each occurrence, R1 and R2 can be independently a substituted or unsubstituted (C1-C20)alkylene. At each occurrence, R3 can be independently a substituted or unsubstituted (C6-C20)arylene. The molar ratio of adduct A to adduct B in the reaction mixture can be about 61:39 to about 90:10.

Abstract: The present disclosure relates to a composition that includes a first repeat unit defined by where R includes a first hydrocarbon chain that includes at least one olefinic bond, R5 includes a second hydrocarbon chain, the second hydrocarbon chain may be saturated, and n may be between 2 and 1,000.

Abstract: The invention relates to a composition for thermoplastic material comprising: 0 to 70% by weight, preferentially 20% to 60% by weight, of short reinforcing fibers, 30% to 100% by weight, preferentially 40% to 80% by weight, of a thermoplastic matrix based on at least one semi-crystalline polyamide polymer, 0 to 50% of additives and/or other polymers, said semi-crystalline polyamide polymer being: a) a reactive composition comprising or consisting of at least one reactive polyamide prepolymer which is a precursor of said semi-crystalline polyamide polymer, or, as an alternative to a), b) a nonreactive composition of at least one polyamide polymer, said composition being that of said thermoplastic matrix defined above, and said reactive polyamide prepolymer of the composition a) and said polyamide polymer of the composition b) comprising or consisting of at least one BACT/XT copolyamide.

Abstract: The invention relates to a composition for thermoplastic composite material comprising: 30% to 60% by volume, preferentially 35% to 50% by volume, of a thermoplastic matrix comprising from 50% to 100% by weight of a semi-crystalline polyamide polymer and from 0% to 50% by weight of at least one additive and/or of at least one other polymer, 40% to 70% by volume, preferentially 50% to 65% by volume, of long reinforcing fibers (or of long fibrous reinforcement), said thermoplastic matrix impregnating said long reinforcing fibers (or said long fibrous reinforcement), said semi-crystalline polyamide polymer being: a) a reactive composition comprising or consisting of at least one reactive polyamide prepolymer which is a precursor of said semi-crystalline polyamide polymer, or, as an alternative to a), b) a nonreactive composition of at least one polyamide polymer, said composition being that of said thermoplastic matrix defined above, and said reactive polyamide prepolymer of the composition a) and said pol

Abstract: A process for preparation of a polyamide PA-4X containing monomer units of 1,4-diaminobutane and an aliphatic linear dicarboxylic acid X with at least 8 carbon atoms, which contains the following steps: 1) making a solution comprising a salt of 1,4-diaminobutane and the aliphatic linear dicarboxylic acid and water, at a temperature at which the salt dissolves; 2) concentrating the solution of the salt at a temperature above the crystallization temperature of the salt, at a pressure of at most 7 barA to a water content of between 0 and 30 wt % based on the total amount of solution, 3) producing a polymer from the solution obtained by step 2, while keeping the polymer in a melt and at a pressure of less than 18 barA, 4) depressurizing the polymer obtained at step 3 while keeping the polymer in the melt to further polymerize the polymer. In an preferred embodiment the aliphatic linear dicarboxylic acid is 1,10-decanedioic acid.

Abstract: A blend comprises at least 50 wt. % polylactic acid and at least 5 wt. % of polymer selected from one or more of: (i) ethylene/unsaturated ester copolymer having an unsaturated ester comonomer content of at least about 30% based on the weight of the ethylene/unsaturated ester copolymer; (ii) modified ethylene/unsaturated ester copolymer; (iii) polyetheramide block copolymer; (iv) propylene/ethylene copolymer comprising at least about 12% and at most about 16% ethylene monomer content based on the weight of the propylene/ethylene copolymer; and (v) styrenic block copolymer. An article such as a tray, film, or sheet may comprise the blend.

Abstract: The invention relates to a copolyamide comprising at least two different units corresponding to the following general formulation: A/X.T A is chosen from a unit obtained from an amino acid, a unit obtained from a lactam and a unit corresponding to the formula (Ca diamine).(Cb diacid), with a representing the number of carbon atoms of the diamine and b representing the number of carbon atoms of the diacid, a and b each being between 4 and 36, advantageously between 9 and 18, X.

Abstract: A liquid crystal photoalignment agent is provided. The liquid crystal photoalignment agent is a copolymer of a cyclobutane dianhydride (“CBDA”) and a CBDA derivative.

Abstract: Nanocarriers are synthesized with polymers that respond to lower pH and/or ROS by being degraded. The compositions may be utilized to selectively deliver payloads within patients by responding to lower pH and/or ROS at localities within the patient. The present invention also features methods of synthesizing nanocarriers that are degraded by lower pH and/or ROS.

Abstract: A shock absorber is prepared from a material formed from branched molecules comprising associative groups. The branched molecules each contains at least bifunctional fragments and at least trifunctional fragments joined together by ester or thioester bridges alone or in combination with amide or urea bridges.

Abstract: This is to provide a polyamide resin which can sufficiently ensure all of a relative viscosity ?r (high degree of polymerization), moldable temperature range estimated from a temperature difference (Td?Tm), heat resistance estimated from a melting point Tm, melt moldability estimated from a temperature difference (Tm?Tc), and low water absorbability as compared with the conventional polyoxamide resin. This is a polyamide resin comprising a dicarboxylic acid-derived unit and a diamine-derived unit being bonded, wherein the above-mentioned dicarboxylic acid contains oxalic acid (Compound A), and the above-mentioned diamine contains 1,6-hexanediamine (Compound B) and 2-methyl-1,5-pentanediamine (Compound C).

Abstract: Disclosed herein is a method of preparing prepolymer particles. The method includes injecting a prepolymer in a solution state by bottom-up type injection to form prepolymer particles by removing a solvent from the prepolymer in a solution state. The method can prepare prepolymer particles, which can be used in solid-state polymerization, using a bottom-up type flash process.

Abstract: Disclosed herein are compositions and article made therefrom and processes of making them. The composition comprises a polymer, the polymer comprising a repeat unit of formula shown below: wherein the polymer is derived from an aromatic diamine comprising m-phenylene diamine, and an aromatic diacid or a derivative thereof comprising furan dicarboxylic acid or derivative thereof.

Abstract: A copolymer which can be formed from a mixture of nylon 6,12 and nylon 6,10 along with other possible components. The nylon copolymer is not only clear (transparent) but also exhibits high dimensional stability in varying environments, limited water absorption, good wear resistance, the ability to accommodate large amounts of glass fillers, and is more resilient and tougher than either nylon 6,10 or nylon 6, 12. Moreover, the crystallinity rate of this combination of homopolymers is reduced to further improve clarity and transparency.

Abstract: A copolyamide resin for molding including a diamine component which includes two or more diamines and a dicarboxylic acid component. The diamine component includes 70 mol % or more of a xylylenediamine which includes 20 mol % or more of p-xylylenediamine and the dicarboxylic acid component includes 70 mol % or more of a straight-chain aliphatic dicarboxylic acid having 6 to 18 carbon atoms. The copolyamide resin contains particles having a major diameter of 50 ?m or more in an amount of 1000 particles/g or less, the particles being made of a polyamide having a melting point higher than that of the copolyamide resin by 20° C. or more when measured by a differential scanning calorimetry. The copolyamide resin has very uniform and stable properties and is excellent in any of mechanical properties, heat resistance, chemical and physical properties, and molding properties. An efficient production method of the copolyamide resin, its resin composition, and its molded article are also described.

Abstract: The present invention relates to a reflector for a light-emitting device consisting of (A) an polyamide composition comprising a polyamide polymerized from (a) a dicarboxylic acid comprising at least 50 mol % of an alicyclic dicarboxylic acid and (b) a diamine comprising at least 50 mol % of a diamine with a branched main chain.

Abstract: A polyamide modified by a multi-functional compound, and a method for producing said polyamide and compositions comprising same are described. A method for the production of a polyamide comprising linear macromolecular chains and star-shaped macromolecular chains is also described. A resulting polyamide having optimal mechanical and rheological properties in order to (i) improve mould filling speed and quality, and (ii) produce moldable compositions with high filler contents is also described.

Abstract: A process for the production of a polyamide containing monomeric units of 1,4-butylene diamine, an aliphatic dicarboxylic acid having 6-12 carbon atoms and a fatty acid based dicarboxylic acid and/or diamine derived there from, which process comprises the steps of: a) making an aquous salt mixture containing 1,4-butylene diamine, the aliphatic dicarboxylic acid having 6-12 carbon atoms and the fatty acid based dicarboxylic acid and/or diamine derived there from, the mixture containing less than 50 wt % water and distilling the mixture to less than 15 wt % of water at a pressure of less than 16 barg, while keeping the mixture at a temperature high enough to keep it liquid, b) starting the polymerization of the mixture obtained in step a) by increasing the temperature until to at least 180° C.

Abstract: Provided is a polyamide resin having high heat resistance, excellent moldability and excellent mechanical properties. The polyamide resin comprises a diamine unit containing 70 mol % or more of a xylylenediamine unit and a dicarboxylic acid unit containing 70 mol % or more of a straight chain aliphatic dicarboxylic acid unit, wherein the xylylenediamine unit is composed of 50 to 95 mol % of p-xylylenediamine and 50 to 5 mol % of m-xylylenediamine; the straight chain aliphatic dicarboxylic acid unit is composed of 50 to 100 mol % of adipic acid and 0 to less than 50 mol % of sebacic acid or other straight chain aliphatic dicarboxylic acids; the molar ratio of reacted diamine units to reacted dicarboxylic acid units (the number of moles of reacted diamine units/the number of moles of reacted dicarboxylic acid units) is less than 0.994; and the polyamide resin has a number average molecular weight of 10,000 to 25,000 and a melting point of 285° C. or more.

Abstract: Provided are polyamide nanocomposites incorporating carbon nanotubes and other filler species. Also provided are related methods.

Abstract: The invention provides a polyamide having a dicarboxylic acid unit containing a decahydronaphthalenedicarboxylic acid unit in an amount of 60 mol % or more, and a diamine unit.

Abstract: A process for making a polyamide polymer, said process comprising heating, in one or more ionic liquid(s), one or more polyamide precursor(s) selected from: (i) one or more free dicarboxylic acid(s) or ester(s) thereof, with one or more diamine(s); or (ii) one or more salt(s) of a dicarboxylic acid with a diamine; or (iii) one or more lactam(s); or (iv) mixtures of any of the foregoing precursors (i) to (iii).

Abstract: Disclosed is a transparent thermoplastic container including a thermoplastic composition including: A) a polyamide resin including a) 10 to 40 mol % of a first repeat unit of formula (I), and b) 60 to 90 mol % of a second repeat unit selected from the group consisting of formula (II) —C(O)(CH2)nC(O)NH(CH2)6NH—??(II); wherein n is an integer selected from 10, 12, and 14; and the mol % of repeat units are based on the total repeat units present in the copolyamide; optionally, B) an aliphatic homopolyamide having one repeat unit selected from the group of formula (II) and C) a functional additive,

Abstract: The invention relates to a copolyamide comprising at least two different units corresponding to the following general formulation: A/X.T A is chosen from a unit obtained from an amino acid, a unit obtained from a lactam and a unit corresponding to the formula (Ca diamine).(Cb diacid), with a representing the number of carbon atoms of the diamine and b representing the number of carbon atoms of the diacid, a and b each being between 4 and 36, advantageously between 9 and 18, X.

Abstract: Reactive extrusion can be used in a continuous, solvent-less preparation of imide oligomers involving two competing reactions among three ingredients, the first reaction between a dianhydride and a diamine and the second reaction between an endcap and the diamine. The imide oligomer can form a composite via conventional production methods or via formation of a film from imide oligomer re-melted in an extruder before being impregnated into tape or fabric.

Abstract: The invention is directed to a process for preparing polyamide polymers, particularly nylon 6, 6 and nylon 6, comprising fluoroether functionalized aromatic repeat units. In one embodiment, 1,6 diaminohexane, adipic acid, and fluoroether functionalized terephthallic or isophthallic acid or diester are reacted to form a polymer. The polymers so formed are useful for imparting soil resistance to polyamides, particularly in the form of films, molded parts, fibers, fabrics, and carpets.

Abstract: The instant invention generally provides polymer microfiller composite comprising a molecularly self-assembling material and a microfiller, and a process of making and an article comprising the polymer microfiller composite.

Abstract: Disclosed are scratch-resistant, transparent and tough copolyamide moulding compounds distinguished by high scratch-resistance, excellent transparency and great toughness, which are suitable for producing transparent moulded articles or transparent coatings. The moulding compounds are obtained by polycondensation of a carboxylic acid mixture including at least one aliphatic dicarboxylic acid and at least one aromatic dicarboxylic acid with at least one cycloaliphatic diamine. Also disclosed are moulded parts or coatings produced from the copolyamide compounds.

Abstract: Compositions and methods for forming surfactants, aqueous dispersions, and curing agents are provided. In one aspect, the invention relates to improved epoxy functional surfactants prepared by reaction of an epoxy composition and an amidoamine composition formed from a blend of acid-terminated polyoxyalkylene polyols. The improved epoxy functional surfactants may be reacted with an excess of epoxy composition and water to result in an aqueous dispersion. The amidoamone composition may be a reaction mixture of a diamine compound and an acid terminated polyoxyalkylene composition formed from two or more polyoxyalkylene polyol compounds. The epoxy functional surfactant may be reacted with amine compounds to form a compound suitable as a curing agent.

Abstract: The present invention relates to a polyamide obtainable by polymerizing an (a) dicarboxylic acid comprising at least 50 mol % of an alicyclic dicarboxylic acid and a (b) diamine comprising at least 50 mol % of a diamine having a substituent branched from a main chain.

Abstract: A liquid crystal alignment agent is provided that includes a polymer including polyamic acid including a repeating unit represented by the following Chemical Formula 1, polyimide including a repeating unit represented by the following Chemical Formula 2, or a combination thereof. In Chemical Formulae 1 and 2, each X1, X2, Y1 and Y2 is the same as in the detailed description.

Abstract: An object of the present invention is to provide a copolymer polyamide which has excellent strength, high-temperature strength, low water absorbance, low blocking properties, releasability and plasticizing time stability, and a copolymer polyamide composition which has excellent vibration fatigue characteristics, surface appearance and continuous productivity. A copolymer polyamide of the present invention is obtained by polymerizing (a) at least one alicyclic dicarboxylic acid, (b) one diamine having 8 or more carbon atoms, and (c) at least one copolymer component selected from the group consisting of the following (c-1) to (c-3): a (c-1) dicarboxylic acid other than the alicyclic dicarboxylic acid; a (c-2) diamine having fewer carbon atoms than the (b) diamine; and a (c-3) lactam and/or aminocarboxylic acid, and the copolymer polyamide satisfies specific conditions.

Abstract: A polyimide and a polyimide film obtained by reacting: an aromatic diamine, and 3,3?,4,4?-biphenyltetracarboxylic acid dianhydride, pyromellitic acid dianhydride, p-phenylenediamine and 4,4?-diaminodiphenyl ether, the amount of the component (I) being 0.1 to 10.0 mol % and the amount of the components (II) being 99.9 to 90.0 mol % based on the total amount of the component (I) and the components (II) (in Formula (1), R1, R2, R3 and R4 are each independently selected from the group consisting of a hydrogen atom, a halogen atom, a nitrogen-containing group, a linear or branched alkyl group with 1 to 12 carbon atoms, a linear or branched alkenyl group with 2 to 12 carbon atoms, a linear or branched alkoxy group with 1 to 12 carbon atoms, a hydroxyl group, a nitrile group, a nitro group, a carboxyl group, a carbamoyl group and an aromatic group with 6 to 12 carbon atoms).

Abstract: Provided are polyamide nanocomposites incorporating carbon nanotubes and other filler species. Also provided are related methods.

Abstract: Provided is a polyamide resin having high heat resistance, excellent moldability and excellent mechanical properties. The polyamide resin comprises a diamine unit containing 70 mol % or more of a xylylenediamine unit and a dicarboxylic acid unit containing 70 mol % or more of a straight chain aliphatic dicarboxylic acid unit, wherein the xylylenediamine unit is composed of 50 to 95 mol % of p-xylylenediamine and 50 to 5 mol % of m-xylylenediamine; the straight chain aliphatic dicarboxylic acid unit is composed of 50 to 100 mol % of adipic acid and 0 to less than 50 mol % of sebacic acid or other straight chain aliphatic dicarboxylic acids; the molar ratio of reacted diamine units to reacted dicarboxylic acid units (the number of moles of reacted diamine units/the number of moles of reacted dicarboxylic acid units) is less than 0.994; and the polyamide resin has a number average molecular weight of 10,000 to 25,000 and a melting point of 285° C. or more.

Abstract: The present invention relates to a semi-aromatic polyamide and a method for preparing it with low wastewater discharge. The semi-aromatic polyamide for the present invention is obtained by introducing aromatic dicarboxylic acid, aliphatic diamine containing 4˜14 carbon atoms and the wastewater generated during the previous prepolymerization into an autoclave for prepolymerization reaction and then further polymerizing the prepolymer. In this preparation method, the wastewater generated during polymerization is recycled, thus greatly reducing the wastewater discharge; the raw materials in the wastewater are effectively recycled, thus improving the utilization rate of raw materials; meanwhile, the diamine in the wastewater compensates that lost along with water discharge during prepolymerization, thus ensuring the Mole ratio balance between dicarboxylic acid monomer and diamine monomer.

Abstract: [Problem to be Solved] A main object of the present invention is to provide a polyamide and a polyamide composition capable of rendering good surface appearance stability and outstanding impact resistance properties to a molded article even when molded under rigorous molding conditions. [Solution] The present invention is (A) a polyamide comprising (a) a unit comprising adipic acid and hexamethylenediamine and (b) a unit comprising isophthalic acid and hexamethylenediamine, wherein a ratio of the isophthalic acid component to the total carboxylic acid component in the polyamide is 0.05?(x)?0.5 and a range of blocking ratio (Y) is ?0.3?(Y)?0.8. Also, the polyamide composition of the present invention contains 30 to 95% by mass of the above polyamide and 5 to 70% by mass of (B) an inorganic filler.

Abstract: Disclosed is a copolyamide including 8 to 92 mole percent repeat units of the formula —C(O)(CH2)14C(O)NH(CH2)nNH—??(I) and 8 to 92 mole percent repeat units of the formula —C(O)(CH2)16C(O)NH(CH2)nNH—??(II) wherein n is an integer selected from 4, 6, 10 and 12; thermoplastic compositions including the copolyamide; and molded and extruded articles prepared from the thermoplastic compositions.

Abstract: A polyamide compound containing from 25 to 50 mol % of a diamine unit that contains at least 50 mol % of an alicyclic diamine unit represented by the following general formula (I); from 25 to 50 mol % of a dicarboxylic acid unit that contains a linear aliphatic dicarboxylic acid unit represented by the following general formula (II-1) and/or an aromatic dicarboxylic acid unit represented by the following general formula (II-2) in an amount of at least 50 mol % in total; and from 0.1 to 50 mol % of a constituent unit represented by the following general formula (III): wherein, in the formulae, n indicates an integer of from 2 to 18; Ar represents an arylene group; and R represents a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group.

Abstract: An adhesive agent comprising a condensation resin having a structural unit obtained by polycondensing a polymerizable monomer containing a monomer (A) having 2 or more carboxyl groups and a monomer (B) having 2 or more amino groups, and meeting at least one of the following (1) and (2), and the following (3): (1) at least one selected from the group consisting of the monomer (A), an anhydride of the monomer (A). and the monomer (B) is liquid at 25° C.; (2) the condensation resin has a polyoxyalkanediyl group; and (3) the monomer (A) contains an isophthalic acid.

Abstract: Polyamide having a melting point between 330° C. and 370° C., said polyamide comprising: a diamine component (a) comprising between 0 and 55 mole %, based on the total number of moles of the diamine component (a), of at least one aliphatic diamine having more than 6 carbon atoms, and between 45 and 100 mole %, based on the total number of moles of the diamine component (a), of at least one aliphatic diamine having at most 6 carbon atoms, and a dicarboxylic acid component (b) comprising more than 50 mole %, based on the total number of moles of the dicarboxylic acid component (b), of terephthalic acid, with the exception of a certain specific polyamide (P*).

Abstract: Polyamide terpolymer compositions, which contain biobased monomers and are suitable for making shaped articles, are disclosed. Comprised of three monomeric species polymerized randomly, including hexamethylene diamine, adipic acid and a bio-based monomer, the compositions are easier to process and have better dye uniformity than polyamides formed from melt-blended biobased components, and are comparable in dyeability, color fastnessand appearance retention performance to non-biobased polyamide copolymers.

Abstract: Polyimide resin compositions that contain an end-capped rigid aromatic polyimide, graphite and, optionally, a filler selected from sepiolite, attapulgite, kaolinite, or a mixture thereof, are found to exhibit low wear at high temperatures. Such compositions are especially useful in molded articles that are exposed to wear conditions at high temperatures such as aircraft engine parts.

Abstract: The present invention relates to a process for preparing a polyamide based on dicarboxylic acids and diamines, comprising the following stages: A) providing an aqueous monomer mixture composed of dicarboxylic acids and diamines, where the molar ratio of dicarboxylic acids to diamines is adjusted such that, at the outlet of stage C), there is a molar deficiency of dicarboxylic acids or diamines of 1 to 10 mol%, based on the respective other component, B) transferring the aqueous mixture from stage A) into a continuous evaporator reactor in which diamines and dicarboxylic acids are converted at a temperature in the range from 100 to 370° C. and a pressure in the range from 1 to 50 bar, C) transferring the mixture from stage B) into a separator which is operated at a temperature in the range from 100 to 370° C.

Abstract: The invention pertains to an aramid copolymer composition comprising an aramid copolymer having at least one arylene carboxylic acid moiety and at least one hydroxyarylene moiety, or comprising an aramid copolymer having at least one arylene carboxylic acid moiety or having at least one hydroxyarylene moiety, and a crosslinker agent. The invention further relates to crosslinked copolymers derived thereof and shaped articles comprising said crosslinked copolymers.

Abstract: The invention is directed to a transparent mold made of a polyamide molding material containing at least one polyamide formed from at least one diamine selected from the group of hexamethylene diamine (HMDA), bis-(4-amino-3-methylcyclohexyl)methane (MACM) and/or bis-(4-amino-cyclohexyl)methane (PACM) as well as from at least one dicarboxylic acid selected from the group of isophthalic acid (IPS), terephthalic acid (TPS) and/or dodecanedioic acid (DDS) or from the aforementioned diamines and dicarboxylic acids in combination with lactams and/or ?-/?-amino acids.

Abstract: The present invention relates to a reflector for a light-emitting device consisting of (A) an polyamide composition comprising a polyamide polymerized from (a) a dicarboxylic acid comprising at least 50 mol % of an alicyclic dicarboxylic acid and (b) a diamine comprising at least 50 mol % of a diamine with a branched main chain.