摘要:
The present disclosure relates to an additive manufacturing (AM) method for making a three-dimensional (3D) object, comprising a) the provision of providing a powdered polymer material (M) comprising at least one polymer (P1 ) having a melting temperature (Tm) greater than 270°C, as measured by differential scanning calorimetry (DSC) according to ASTM D3418, and at least one polymer (P2) having a glass transition temperature (Tg) between 130°C and 240°C, and no melting peak, as measured by differential scanning calorimetry (DSC) according to ASTM D3418, b) the deposition of successive layers of the powdered polymer material; and c) the selective sintering of each layer prior to the deposition of the subsequent layer, wherein the powdered polymer material (M) is heated before step c) to a temperature Tp (°C): Tp
摘要:
The present invention relates to copolyamides comprising 3-(aminomethyl)benzoic acid (3-AMBa). The present invention also relates to polymer compositions comprising such copolyamides, as well as articles comprising the same and methods of using said articles in automotive applications, LED packaging, mobile electronics, plumbing and oil and gas applications.
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 a poly(biphenyl ether sulfone) polymer (PPSU) having an optimized weight average molecular weight (Mw). In particular, the present disclosure relates to part material incorporating a PPSU of Mw ranging from 48,000 to 52,000 g/mol, 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 a process for treating the surface of a polymer article with a UV-stabilizer solution which comprises an effective amount of a UV- absorber compound dissolved in a solvent, and optionally a radical scavenger. The present invention also relates to a process for preparing a UV-stabilized polymer article which comprises a step consisting in contacting the surface layer of a polymer article with the UV stabilizer solution. The present invention also provides UV-stabilized polymer articles, that-is-to-say polymer articles which are resistant to color change upon exposure to UV light.
摘要:
Methods of cross-linking or chain extending a polymeric material including a silane-modified poly(arylene ether) polymer (Si-PAE) in a shaped article include heating the shaped article from a temperature T 1 to a temperature T 2 >T 1 , while maintaining the temperature at which the shaped article is heated within a specified range based on the increasing Tg of the polymeric material during the heating. Shaped articles cross-linked or chain extended by the methods are also described.
摘要:
A polymer composition includes components selected from: (i) at least one a poly(aryl ether ketone) (PAEK),(ii) a poly(ether sulfone) (PES),(iii) a reactive poly(ether sulfone) (rPES),(iv) a reactive poly(aryl ether ketone) (rPAEK),(v) an acid component, and(vi) at least one alkali metal carbonate. Preferably, the polymer composition is free or substantially free of solvent. A method includes melt mixing the components of the polymer composition.
摘要:
The present invention relates to (co)polyamides comprising at least 60 mol.% of recurring units of formula (I): (I). The present invention also relates to polymer compositions comprising such (co)polyamides, as well as articles comprising the same and methods of using said articles in high temperature applications requiring sufficient swelling or deformation upon exposure to moisture, such as for example oil and gas extraction processes (e.g. fracturing balls), or as support materials used to print three-dimensional (3D) parts.
摘要:
The invention pertains to a polyarylether sulfone polymer [polymer (PAES)] incorporating recurring units derived from well-defined amount of bi- or poly-functional monomers having identical functionalities in each of their reactive groups in a chain of units derived from of a monohalo-monohydroxyl arylsulfone monomer comprising groups of formula (A), free from hydroxyl groups which are bound to a phenyl ring comprising an activating -SO 2 - group in para-position, while comprising an activated aromatic halogen bound to a phenyl ring comprising an activating -SO 2 - group in para-position, having improved balance between mechanical properties and viscosity in the molten state, and endowed by lower polydispersity indexes with respect to materials of the prior art, to a method for making the same, to polymer compositions comprising the same, and to shaped articles therefrom.
摘要:
A (co)polymer including a recurring unit of Formula (I): Y includes at least one aryl group and at least one group selected from C=O, O=S=O, -NH-, and -CF 2 -; B and B' are independently selected from -O-, -NH-, and -S-;and A and A' are independently selected from a bond,-CH 2 -, an alkyl, an aryl group, and an arylalkyl group.
摘要:
Soluble liquid crystalline polyesters (LCPs) exhibiting low dielectric constant and dissipation factors, articles containing the said LCPs, such articles being suitable for mobile electronic device components, for example films or structural components, solutions comprising the LCPs and use of the said solutions for the manufacture of films or mobile electronic device articles or components.