Abstract: Described herein are polyamides (PA) formed from a reaction mixture (RM) including a diamine component (DA) and a dicarboxylic acid component (DC). The diamine component (DA) includes at least 99 mol % of 1.3-bis (aminomethyl) cyclohexane (“1,3-BAC”) and the dicarboxyic acid component (DC) includes at least 90 mol % of terephthalic acid (“TA”). It was surprisingly found that the polyamides (PA) had and increased glass transition temperature (“Tg”), while maintaining high melting temperatures (“Tm”) and high crystallinity. More particularly, in some embodiments, the polyamides (PA) have a Tg of at least 165° C. a Tm of at least 280° C. and a heat of fusion (“?Hf”) of at least 20 J/g.

Abstract: An additive manufacturing filament is provided, as are 3D manufacturing methods using the filament, and articles and composite materials made therefrom. The filament comprises a polymer composition, and the polymer composition comprises, in turn, at least 50 wt. % of a polyamide.

Abstract: Described herein are amorphous and transparent aliphatic polyamides (PA) formed from the polycondensation of monomers in a reaction mixture (RM) including a dicarboxylic acid component (DC) and a diamine component (DA). The dicarboxylic acid component (DC) includes 25 mol % to 80 mol % of 1,4-cyclohexane dicarboxylic acid (“1,4-CHDA”) and 20 mol % to 75 mol % of a linear, aliphatic dicarboxylic acid selected from azelaic acid, sebacic acid or a combination thereof. The diamine component (DA) includes a cycloaliphatic diamine selected from the group consisting of isophoronediamine (“IPDA”); 4,4?-methyl-enebis(2-methylcyclohexylamine) (“MACM”); 4,4?-methylene-bis-cyclohexane (“PACM”); 1,3-bis(aminomethyl)cyclohexane (“1,3-BAC”), bis(aminomethyl)norborane (“BAMN”) and any combination of two or more thereof.

Abstract: Described herein are thermoplastic composites including a polymer matrix, having a at least one semi-crystalline polyphthalamide (“PPA”) polymer, and at least one continuous reinforcing fiber. It was surprisingly discovered that incorporation of semi-crystalline PPA polymers, having a selected melt profile, into the polymer matrix provided for crack-free thermoplastic composites. Based at least in part on the semi-crystalline structure of PPA polymers, the thermoplastic composite can have improved tensile strength, chemical resistance and thermal stability, relative to composites incorporating an amorphous PPA polymer. The composites can be formed using melt impregnation techniques, well known in the art. The composites can be desirably used in a wide range of application settings including, but not limited to automotive, aerospace, automotive and oil and gas and mobile electronic device applications.

Abstract: The present invention relates to a process for preparing fine particles of an aromatic copolyester, the process comprising the melt-blending of the aromatic copolyester with a polyester polymer (PE), the cooling the blend and the recovery of the particles by dissolution of the PE into water. The present invention also relates to aromatic copolyester particles obtained therefrom and to the use of these particles in to make coatings or films.

Abstract: Described herein are polymer compositions (PC) including a polyamide (PA) and a poly(arylene sulfide) (PASP). The polyamide (PA) is a semi-aromatic polyamide derived from the polycondensation of an aliphatic diamine, a bis(aminoalkyl)cyclohexane, terephthalic acid, and, optionally, a cyclohexanedicarboxylic acid. It was surprisingly discovered that semi-aromatic polyamides derived from the cycloaliphatic diamine bis(aminoalkyl)cyclohexane or the specific combination of the cycloaliphatic diamine bis(aminoalkyl)cyclohexane and the cycloaliphatic dicarboxylic acid cyclohexanedicarboxylic acid provided for polymer compositions (PC) having improved retention of mechanical properties (e.g. tensile modulus and tensile strength) after aging in aqueous polyol solutions. It was also surprisingly discovered that incorporation of a nucleating agent in the polymer composition (PC) provided for significantly improved tensile strength retention after aging.

Abstract: Described herein are polymer compositions (PC) including a polyamide (PA) and a reactive impact modifier. As explained in detail below, the polyamide (PA) is a semi-aromatic polyamide derived from the polycondensation of an aliphatic diamine, a bis(aminoalkyl)cyclohexane, terephthalic acid, and, optionally, a cyclohexanedicarboxylic acid. It was surprisingly discovered that semi-aromatic polyamides derived from the cycloaliphatic diamine bis(aminoalkyl)cyclohexane or the specific combination of the cycloaliphatic diamine bis(aminoalkyl)cyclohexane and the cycloaliphatic dicarboxylic acid cyclohexanedicarboxylic acid provided for polymer compositions (PC) having improved retention of mechanical properties (e.g. tensile strength and flexural strength) after aging in aqueous solutions, relative to analogous polyamides free of the bis(aminoalkyl)cyclohexane and the cyclohexanedicarboxylic acid.

Abstract: Polyamides are made from the polycondensation of monomers including from 15 to 80 mol % of 2,5-furandicarboxylic acid (FDCA), from 20 to 85 mol % of at least one aromatic dicarboxylic acid and from 50 to 100 mol % of at least one aliphatic diamine selected from those including 6 and 7 carbon atoms. A process allowing the synthesis of high molecular weight polyamides made from the above mentioned monomers is also described. Finally, compositions and articles including the same polyamides are also disclosed.

Abstract: A furan-based polyamide is prepared by the following steps: (1) preparing a furan-based oligomer of formula (1) H2N—R—(NH—CO—F—CO—NH—R)n—NH2 (1) where R is a hydrocarbon moiety and F is a furan (cyclo-C4H2O) moiety and n represents the average degree of oligomerization, and where n is within the range of 1 to 10 by reacting 2,5-furandicarboxylic acid or its derivative with a diamine at a temperature of at most 100° C.; (2) contacting the oligomer of step (1) with a bifunctional linker selected from an acid or a derivative thereof where the acid is furandicarboxylic acid or a non-aromatic dicarboxylic acid; provided that if the hydrocarbon moiety R is aromatic, then the bifunctional linker is an aromatic dicarboxylic acid or a derivative thereof, at a mole ratio of the oligomer to the difunctional linker within the range of 0.8 to 1.5 at polycondensation conditions, and (3) isolating the resulting polyamide.

Abstract: A furan-based polyamide is prepared by the following steps: (1) preparing a furan-based oligomer of formula (1) H2N—R—(NH—CO—F—CO—NH—R)n—NH2 (1) where R is a hydrocarbon moiety and F is a furan (cyclo-C4H2O) moiety and n represents the average degree of oligomerization, and where n is within the range of 1 to 10 by reacting 2,5-furandicarboxylic acid or its derivative with a diamine at a temperature of at most 100° C.; (2) contacting the oligomer of step (1) with a bifunctional linker selected from an acid or a derivative thereof where the acid is furandicarboxylic acid or a non-aromatic dicarboxylic acid; provided that if the hydrocarbon moiety R is aromatic, then the bifunctional linker is an aromatic dicarboxylic acid or a derivative thereof, at a mole ratio of the oligomer to the difunctional linker within the range of 0.8 to 1.5 at polycondensation conditions, and (3) isolating the resulting polyamide.

Abstract: The present invention relates to components of mobile electronic devices made of an amorphous polyamide composition characterized by excellent mechanical properties, low moisture uptake, low distortion and very good aesthetical properties. The amorphous polyamide has recurring units derived from the polycondensation of a mixture of monomers of aromatic dicarboxylic acid(s), cycloaliphatic diamine(s) with 6 to 12 carbon atoms, and a third monomer with 10 to 16 carbon atoms.

Abstract: Compositions and methods for treating, preventing and diagnosing Helicobacter infection are disclosed. The methods use proteins and/or nucleic acids derived from Helicobacter cerdo, a new pathogen isolated from swine. In addition, porcine models for studying bacterial gastritis and gastric and duodenal ulcer disease caused by Helicobacter pathogens, such as H. pylori and H. cerdo are described, as well as methods of identifying vaccines and compounds for treating and/or preventing Helicobacter infection using the animal models. Also described are methods of preventing Helicobacter infection in swine, such as infection caused by H. cerdo, using immunogenic proteins and nucleic acids derived from Helicobacter pathogens, such as H. pylori.

Abstract: Compositions and methods for treating, preventing and diagnosing Helicobacter infection are disclosed. The methods use proteins and/or nucleic acids derived from Helicobacter cerdo, a new pathogen isolated from swine. In addition, porcine models for studying bacterial gastritis and gastric and duodenal ulcer disease caused by Helicobacter pathogens, such as H. pylori and H. cerdo are described, as well as methods of identifying vaccines and compounds for treating and/or preventing Helicobacter infection using the animal models. Also described are methods of preventing Helicobacter infection in swine, such as infection caused by H. cerdo, using immunogenic proteins and nucleic acids derived from Helicobacter pathogens, such as H. pylori.

Abstract: Compositions and methods for treating, preventing and diagnosing Helicobacter infection are disclosed. The methods use proteins and/or nucleic acids derived from Helicobacter cerdo, a new pathogen isolated from swine.