Compositions for 3D printing
AssigneeObjet Geometries Ltd.
InventorsEduardo Napadensky, Diana Ravich
Life of this patent
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Abstract
Described is a composition for solid freeform fabrication (SFF) at a given dispensing temperature. The composition comprises: a curable component having a monofunctional (meth)acrylic functional group; a photo-initiator, and a sulfur-containing additive. The viscosity of the composition, as measured at the given dispensing temperature, changes by no more than 3 cps during 30 days of aging at 40° C.
Claims25
A composition for solid freeform fabrication (SFF) at a given dispensing temperature, the composition comprising:
- a curable component having a (meth)acrylic functional group;
- a photo-initiator, initiating polymerization of the curable component when exposed to radiation;
- and
- a sulfur containing additive,
- wherein the viscosity of the composition, as measured at said given dispensing temperature, changes by 3 cps or less during 30 days of aging at 40° C.
A method of forming a three dimensional object at a given dispensing temperature, the method comprising:
- (a) dispensing a composition for solid freeform fabrication from a printing head;
- and
- (b) curing said composition,
- (c) repeating (a) and (b) until the three dimensional object is formed,
- wherein said composition comprises:
- a curable component having a (meth)acrylic functional group;
- a photo-initiator, initiating polymerization of the curable component when exposed to radiation;
- and
- a sulfur containing additive, and
- wherein the viscosity of the composition, as measured at said given dispensing temperature, changes by 3 cps or less during 30 days of aging at 40° C.
A composition for solid freeform fabrication (SFF) comprising:
- a curable component having a monofunctional group, said group being (meth)acrylic;
- and said curable component being at a concentration of at least 30%
- a photo-initiator;
- and
- a mercaptopropionate substance at a concentration of 4% or less,
- wherein said composition is liquid and has a viscosity between 100 and 300 cps at room temperature;
- wherein the viscosity of the composition changes by 3 cps or less over 30 days aging at 40° C., said viscosity being measured at a dispensing temperature of 50° C. to 90° C.;
- and
- wherein said composition results in a solid material after UV curing.
Dependencies are inferred from the claim text.