Compositions and methods for use in three dimensional model printing
A method for printing three dimensional objects and support compositions are disclosed. The composition includes at least one curable component and at least one non-curable component, the non-curable component being a polyol, a glycol or water, wherein none of said non-curable components is reactive with any of said curable components. The composition has a first viscosity of 20-500 cps at ambient temperature and a second viscosity of less than 20 cps at temperature higher than the ambient temperature. The composition results in a solid, a semi solid or a gel type material after radiation.
1. A composition suitable for support in building a three dimensional object, the composition comprising:
at least one curable component,
at least one non-curable component, the non-curable component being a polyol or a glycol wherein none of said non-curable components is reactive with any of said curable components;
wherein said composition has a first viscosity of 20-500 cps at ambient temperature, and a second viscosity of less than 20 cps at temperature higher than the ambient temperature;
wherein, after irradiation, the composition results in a solid, a semi solid or a gel material.
2. The composition of claim 1 , wherein after irradiation, the composition results in a material, which is at least partially soluble in water.
3. The composition of claim 1 , wherein after irradiation, the composition results in a material capable of swelling in water, alkaline water, acidic water or water detergent solution.
4. The composition of claim 1 , wherein the non-curable component is a glycol.
5. The composition of claim 1 , wherein said curable component is a water-miscible or water-soluble component.
6. The composition of claim 5 , wherein said curable component is an acrylic monomer, an acrylic oligomer, (meth)acrylic or any combination thereof.
7. The composition of claim 5 , wherein said curable component is polyethylene glycol monoacrylate, polyethylene glycol diacrylate, methoxypolyethylene glycol monomethacrylate, a (meth)acrylated urethane oligomer derivative of polyethylene glycol, polyethylene glycol urethane diacrylate, a partially (meth)acrylated polyol oligomer, a (meth)acrylated oligomer having hydrophilic substituents, betha-carboxyethyl acrylate, acrylamide, acryloylmorpholine (ACMO) or any combination thereof.
8. The composition according to claim 7 , wherein the hydrophilic substituents of the (meth)acrylated oligomer are acidic substituents, amino substituents, hydroxy substituents, or any combination thereof.
9. The composition according to claim 1 , further comprising an inhibitor.
10. The composition according to claim 1 , further comprising a free radical photo-initiator.
11. The composition according to claim 1 , further comprising a cationic photo-initiator or a combination of a free radical photo-initiator and a cationic photo-initiator.
12. The composition according to claim 1 , further comprising a pigment, a dye or a combination thereof.
13. The composition according to claim 1 , further comprising sodium bicarbonate, calcium carbonate or a combination thereof.
14. The composition according to claim 1 , further comprising a filler.
15. The composition according to claim 1 , wherein the temperature higher than the ambient temperature is higher than 40° C.