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US 10,703,859 B2Granted
Compositions comprising unsaturated crystalline polyester for 3D printing
AssigneeXerox Corporation
InventorsShivanthi E. Sriskandha, Valerie M. Farrugia, Guerino G. Sacripante, Edward G. Zwartz
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Abstract
A composition for use in 3D printing includes an unsaturated polyester resin including an ethylenically unsaturated monomer, a first diol monomer and a second diol monomer.
Claims15
A three-dimensional (3D) printing composition comprising:
- an unsaturated polyester resin having a particle circularity of from about 0.910 to about 0.940 and a thermal initiator combined to form cured and crosslinked unsaturated polyester resin particles, the unsaturated polyester resin comprising
- an ethylenically unsaturated monomer having the formula I
- wherein each p and q is independently from 0 to 8, and z is 1 to 5,
- a first diol monomer;
- and
- a second diol monomer, wherein the cured and crosslinked unsaturated polyester resin comprises from about 75% to about 100% by weight of the composition.
3 more elements
A method of making a three-dimensional (3D) printing composition, comprising:
- copolymerizing a mixture comprising an ethylenically unsaturated dicarboxylic acid, a first diol, and a second diol, thereby forming an unsaturated polyester resin, wherein the copolymerizing is conducted at a temperature in a range from about 150° C. to about 205° C.;
- dispersing the unsaturated polyester resin with a solution comprising a surfactant to form a resin emulsion;
- and
- contacting the resin emulsion with a thermal initiator to form a cross-linked polyester resin, wherein the cross-linked polyester resin comprises from about 75% to about 100% by weight of the three-dimensional (3D) printing composition.
1 more element
Dependencies are inferred from the claim text.