Additive manufacturing method with biobased polyamide composition having high thermal stability
AssigneeSolvay Specialty Polymers USA, LLC
InventorsFranck Touraud, Clement Servel, Stéphane Jeol, Véronique Bossennec
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Abstract
Described herein is an additive manufacturing method of making a three-dimensional (3D) object with a polyamide composition comprising at least 50% by weight (wt %) of a polyamide comprising at least 50% by mol (mol %) recurring units of —NH—(CH2)8—C(O)— and/or —NH—(CH2)9—C(O)—; from 0 wt % to 50 wt % of at least one reinforcing agent and from 0 wt % to 30 wt % of at least one additive, with excellent thermal stability. The present invention also relates to an article or composite material manufactured by the additive manufacturing method.
Claims49
An additive manufacturing method of making a three-dimensional (3D) object with a 3D printer equipped with a print head having an extrusion nozzle, the method comprising the following steps:
- a filament comprising a polyamide composition (PC) is moved to the print head;
- the polyamide composition (PC) in the molten form is deposited by the extrusion nozzle with a first layer on a substrate to form the beginning of a growing shaped object and with further layers on the growing shaped object, the layers being formed according to a predetermined sequence and pattern;
- once the 3D object is prepared and has cooled, it is detached from the substrate,
- wherein the polyamide composition (PC) consists of:
- at least 50.0% wt % of at least one polyamide (PA) comprising at least 90.0 mol % of recurring unit R(PA1) according to formula (V):
- from 0 wt % to 50.0 wt % of at least one reinforcing agent, selected from the group consisting of mineral fillers, glass fibers, carbon fibers, synthetic polymeric fibers, aramid fibers, aluminum fibers, titanium fibers, magnesium fibers, boron carbide fibers, rock wool fibers, steel fibers, natural fibers, graphene, nano-graphene, carbon nanotube, wollastonite, glass balls and any combination of two or more thereof;
- and
- from 0 wt % to 30.0 wt % of at least one additive, selected from the group consisting of lubricants, calcium stearate, magnesium stearate or sodium montanate;
- plasticizers;
- flame retardants;
- nucleating agents;
- heat stabilizers;
- light stabilizers;
- antioxidants;
- processing aids;
- fusing agents;
- electromagnetic absorbers;
- tougheners;
- antistatic agents;
- impact modifiers;
- anti-blocking additive;
- slip additives;
- antifogging additives;
- chemical blowing agents, and any combinations thereof;
- wherein
- n is 8 or 9;
- wt % is relative to the total weight of the polyamide composition;
- and
- mol % is relative to the total moles of recurring units in the polyamide (PA).
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A filament for use in 3D printing, having a diameter d between 0.5 mm and 5.0 mm, the composition of which consists of a polyamide composition (PC) consisting of:
- at least 50.0 wt % of a polyamide (PA) comprising at least 90.0 mol % of recurring unit R(PA1) according to formula (V):
- from 0 wt % to 50.0 wt % of at least one reinforcing agent, selected from the group consisting of mineral fillers, glass fibers, carbon fibers, synthetic polymeric fibers, aramid fibers, aluminum fibers, titanium fibers, magnesium fibers, boron carbide fibers, rock wool fibers, steel fibers, natural fibers, graphene, nano-graphene, carbon nanotube, wollastonite, glass balls and any combination of two or more thereof;
- and
- from 0 wt % to 30.0 wt % of at least one additive, selected from the group consisting of lubricants, calcium stearate, magnesium stearate or sodium montanate;
- plasticizers;
- flame retardants;
- nucleating agents;
- heat stabilizers;
- light stabilizers;
- antioxidants;
- processing aids;
- fusing agents;
- electromagnetic absorbers;
- tougheners;
- antistatic agents;
- impact modifiers;
- anti-blocking additive;
- slip additives;
- antifogging additives;
- chemical blowing agents, and any combinations thereof,
- wherein
- n is 8 or 9;
- the polyamide (PA) does not comprise recurring units derived from a cyclic monomer;
- wt % is relative to the total weight of the polyamide composition (PC);
- and
- mol % is relative to the total moles of recurring units in the polyamide (PA).
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Dependencies are inferred from the claim text.