摘要:
The invention relates to a process for preparing polymeric particles, based on the use of a polyester polymer (PE) comprising units from a dicarboxylic acid component and a diol component, wherein at least 2 mol. % of the diol component is a poly(alkylene glycol). The process comprises the melt-blending of the aromatic polymer (P) with the PE, the cooling the blend and the recovery of the particles by dissolution of the PE into water. The present invention relates to polymeric particles obtained therefrom and to the use of these particles in SLS 3D printing, coatings and toughening of thermoset resins.
摘要:
The present disclosure relates to method of making three-dimensional (3D) objects using an additive manufacturing system wherein the part material comprises a polymeric component comprising at least one poly(ether ether ketone) polymer (PEEK) having a weight average molecular weight (Mw) ranging from 75,000 to 100,000 g/mol (as determined by GPC), for example in the form of filaments or spherical particles, for use in additive manufacturing systems to print 3D objects.
摘要:
The present invention relates to polymers and blends of polymers comprising anthracene moieties able to undergo a cycloaddition reaction under certain stimuli, thereby forming polymer adducts endowed with improved or additional properties with respect to those of the starting polymers.
摘要:
The present invention relates to polymer compositions (C) for the preparation of porous article, notably microporous membranes or hollow fibers. More particularly, the present invention relates to a process of preparing a porous article from a blend of at least one semi-crystalline or amorphous polymer (P) with an additive followed by a step of shaping the article and contacting the article with water to dissolve the additive and create an interconnected pore network within the shaped article.
摘要:
A polymer compositionincludes a poly(para-phenylene sulfide)(PPS), at least one poly(aryl ether sulfone) (PAES),and at least one alkali metal carbonate. Preferably, the polymer composition is free or substantially free of solvent. A method includes melt mixinga poly(para-phenylene sulfide)(PPS), at least one poly(aryl ether sulfone) (PAES), and at least one alkali metal carbonate.
摘要:
The invention pertains to a method for manufacturing a three-dimensional object with an additive manufacturing system, such as an extrusion-based additive manufacturing system, a selective laser sintering system, and/or an electrophotography-based additive manufacturing system, comprising providing a support material comprising more than 50 % wt. of a semi-crystalline polyamide [polyamide (A)] having a melting point, as determined according to ASTM D3418, of at least 250°C and possessing a water absorption at saturation, by immersion in water at 23°C, of at least 2 % wt.
摘要:
The present invention relates to a process for manufacturing a three-dimensional (3D) article, part or composite material, from a filament comprising a polyamide (PA) presenting 4,4'-diaminodicyclohexylmethane moieties, as well as to such filament. The present invention also relates to the 3D article, part or composite material 5 obtainable from such process, as well as the use of the article, part or composite materials in oil and gas applications, automotive applications, electric and electronic applications, aerospace, medical and consumer goods.
摘要:
The present invention relates to a process for manufacturing a three-dimensional (3D) article, part or composite material, from a powdered material (M) comprising a polyamide (PA) presenting 4,4'-diaminodicyclohexylmethane moieties, as well as to such powdered material (M). The present invention also relates to the 3D article, part or composite material obtainable from such process, as well as the use of the article, part or composite materials in oil and gas applications, automotive applications, electric and electronic applications, aerospace, medical and consumer goods.
摘要:
The present invention relates to poly(arylene sulfide) ("PAS") polymers having outstanding mechanical properties. The invention also relates to methods of making PAS polymers and articles incorporating the PAS polymer.
摘要:
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. The polymer compositions (PC) can be desirably incorporated into articles that are exposed to elevated temperatures and are designed to convey or store polyol based fluids including, but not limited to, engine coolant.