Abstract: The present disclosure relates to thermoplastic copolyamide particles for toughening and/or reducing microcracking in composite materials, wherein the particles have a given particle distribution.

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 disclosure relates to a stitching yarn and non-crimp fabrics containing such yarn. The stitching yarn described herein is a multifilament stitching yarn characterized by two or more of the following properties: (a) comprises a plurality of polymeric fibers, (b) has a linear density of less than or equal to 80 dtex, (c) has a filament count of less than or equal to 0.8 times the dtex value of the stitching yarn, or (d) has a twist of less than 200 revolutions per meter (r/m). The present disclosure also relates to a fiber preform, composite material, and composite article containing the non-crimp fabric.

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 plasticized cellulose ester derivative compositions comprising a cellulose ester derivative and at least a one compound having a molecular weight preferably equal to or more than 200 g/mol and equal to or less than 600 g/mol wherein the exudation, determined by Isothermal ThermoGravimetric Analysis at 60° C. during 20 hours, is equal to or less than 1.00%. The compositions display efficient plasticizing performances and limited exudation in time and temperature. The present invention further relates to the use of a compound of formula (I), formula (II), formula (III) or an acyl trialkyl citrate as a plasticizer of a cellulose ester derivative and a process for the manufacture of a plasticized article.

Abstract: Precipitated silica specifically useful in the paper industry and in particular in paper-coating applications for inject printing, is characterized by an uptake of DOP oil lower than 260 ml/100 g, a pore volume (Vd25) of greater than 0.8 ml/g formed by pores having a diameter of less than 25 nm, a CTAB specific surface area of greater than 280 m2/g.

Abstract: A process is described for manufacturing articles by selective fusion of polymer powder layers, especially the rapid prototyping by solid-phase laser sintering of a powder based on a copolyamide of type 6 having a low enthalpy of cold crystallization. Further described, are the articles obtained by such a process.

Abstract: The invention relates to a method for reducing the CO2 content of a gas by contacting the gaseous effluent to be treated with an absorbent that contains a CO2 trapping agent in the impregnated state on a substrate made of a solid composite material (M) containing a polymer (P) and a compound (C) selected from mineral oxides, silico-aluminates, and activated carbon, wherein said material (M) has an average particle size (D50) higher than or equal to 100 ?m, and a pore space (Vd1) defined by pores having a diameter of between 3.6 and 1000 nm and which is at least 0.2 cm3/g. The invention also relates to specific absorbents used in said method.

Abstract: Precipitated silica specifically useful in the paper industry and in particular in paper-coating applications for inject printing, is characterized by an uptake of DOP oil lower than 260 ml/100 g, a pore volume (Vd25) of greater than 0.8 ml/g formed by pores having a diameter of less than 25 nm, a CTAB specific surface area of greater than 280 m2/g.

Abstract: A polymeric layer; and in particular the use of this polymeric layer as an outer protective layer of a photovoltaic module. The polymer of the layer is selected from the group consisting of cellulose and its derivatives; starch and its derivatives; alginates and their derivatives; guars and their derivatives; chitin and its derivatives; and pectin and its derivatives.

Abstract: A polymeric optical lens for a light-emitting diode (LED) light source module, and in particular an LED light source module comprising this polymeric optical lens, and an LED lamp comprising this module. More particularly, an optical lens for a light-emitting diode (LED) light source module comprising a polymer selected from the group consisting of cellulose and its derivatives; starch and its derivatives; alginates and their derivatives; guars and their derivatives; chitin and its derivatives; and pectin and its derivatives.

Abstract: A process is described for manufacturing articles by selective fusion of polymer powder layers, especially the rapid prototyping by solid-phase laser sintering of a powder based on a copolyamide of type 6 having a low enthalpy of cold crystallization. Further described, are the articles obtained by such a process.

Abstract: The invention relates to a method for reducing the CO2 content of a gas by contacting the gaseous effluent to be treated with an absorbent that contains a CO2 trapping agent in the impregnated state on a substrate made of a solid composite material (M) containing a polymer (P) and a compound (C) selected from mineral oxides, silico-aluminates, and activated carbon, wherein said material (M) has an average particle size (D50) higher than or equal to 100 ?m, and a pore space (Vd1) defined by pores having a diameter of between 3.6 and 1000 nm and which is at least 0.2 cm3/g. The invention also relates to specific absorbents used in said method.

Abstract: Precipitated silica specifically useful in the paper industry and in particular in paper-coating applications for inject printing, is characterized by an uptake of DOP oil lower than 260 ml/100 g, a pore volume (Vd25) of greater than 0.8 ml/g formed by pores having a diameter of less than 25 nm, a CTAB specific surface area of greater than 280 m2/g.

Abstract: The invention concerns compounds, for use as liquid support and as anticaking agent, and, simultaneously, as nutrient additive in particular for animals, including of precipitated silica and phosphate selected among phosphates of elements of groups Ia or IIa of the periodic table of the elements and rare-earth phosphates, the compounds being in the form of substantially spherical pellets.

Abstract: The invention concerns compounds, for use as liquid support and as anticaking agent, and, simultaneously, as nutrient additive in particular for animals, consisting of precipitated silica and phosphate selected among phosphates of elements of groups Ia or IIa of the periodic table of the elements and rare-earth phosphates, said compounds being in the form of substantially spherical pellets.

Abstract: The invention concerns the use, as thickening or texturing agent in toothpaste compositions, of a highly dispersible precipitated silica having a pH of 3.5 to 9, a DOP oil absorption higher than 200 ml/g, a CTAB specific surface area from 70 to 250 m2, a median diameter of at least 20 ?m determined by ultrasound-free laser diffraction, a residual anion rate, expressed in sodium sulphate, less than 5 wt. %.

Abstract: The invention concerns the use, as thickening or texturing agent in toothpaste compositions, of a highly dispersible precipitated silica having a pH of 3.5 to 9, a DOP oil absorption higher than 200 ml/g, a CTAB specific surface area from 70 to 250 m2, a median diameter of at least 20 &mgr;m determined by ultrasound-free laser diffraction, a residual anion rate, expressed in sodium sulphate, less than 5 wt. %.

Abstract: The invention relates to precipitated silica microbeads having sensory properties in the mouth, and a specific surface CTAB of at least 100 m2/g, an oil uptake of at least 200 ml/g, a mean particle diameter from 50 &mgr;m to 600 &mgr;m, at the surface from 0.5 to 2 parts by weight, (expressed as zinc metal) of a zinc derivative with a degree of oxidation of 2 per 100 parts by weight of silica, a pH from about 7 to 9, and possibly between 0.2 and 5 parts by weight of a white pigment for 100 parts by weight of silica The invention also relates to a method for producing said microbeads by precipitation, treatment of the silica slurry with a soluble zinc compound, mechanical thinning of the cake resulting from the separation of the treated silica slurry, and drying by atomization. The invention further relates to their use in toothpaste preparations as sensory agents acting in the mouth.

Abstract: L-aspartic acid is improvedly prepared in high yields by treating ammonium aspartate, advantageously in aqueous reaction medium, with an effective, aspartic acid-precipitating amount of fumaric acid.