Use of isosorbide
The present invention relates to the use of a composition comprising isosorbide diglycidyl ether and a curing agent as a sacrificial support, to a sacrificial support comprising isosorbide repeating units, to methods for producing the sacrificial support of the invention and to uses of the sacrificial support of the invention for producing three-dimensional objects.
1. A sacrificial support for producing a three-dimensional object, the sacrificial support comprising a polymer obtained by reacting an epoxy resin including isosorbide ether units with a curing agent, wherein the epoxy resin does not include a bisphenol A unit.
2. The sacrificial support of claim 1 , wherein the polymer further comprises amine groups.
3. The sacrificial support of claim 1 , wherein the sacrificial support has a Tg between 5° and 180° C., measured via differential scanning calorimetry according to ASTM D 3418.
4. The sacrificial support of claim 1 , wherein the sacrificial support has elongation at break in the range of 3.5 and 10.5% measured at 25° C. according to ASTM D 638.
5. The sacrificial support of claim 1 further comprising at least one inorganic filler.
6. The sacrificial support of claim 1 further comprising at least one organic filler.
7. The sacrificial support of claim 1 further comprising an insert made of a polymeric material.
8. The sacrificial support of claim 1 , wherein the isosorbide ether units have an epoxide equivalent weight between 100 and 230 g/mol.
9. The sacrificial support of claim 1 wherein the sacrificial support has a flexural strength in the range of 80 and 160 MPa measured at 25° C. according to ASTM D 790.
10. The sacrificial support of claim 1 , wherein the sacrificial support has a maximum strain calculated on flexural properties in a range of 2% and 6% measured at 25° C. measured according to ASTM D 790.
11. The sacrificial support of claim 1 , wherein the sacrificial support has strain at break calculated on flexural properties in a range of 5% and 12% measured at 25° C. according to ASTM D 790.
12. The sacrificial support of claim 1 , wherein the sacrificial support has a flexural elastic modulus in a range of 2500 and 5500 MPa measured at 25° C. according to ASTM D 790.
13. The sacrificial support of claim 1 , wherein the sacrificial support has a tensile strength in the range of 50 and 100 MPa measured at 25° C. according to ASTM D 638.