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Coalescing agent for three-dimensional (3D) printing

  • US 10,640,661 B2
  • Filed: 09/29/2014
  • Issued: 05/05/2020
  • Est. Priority Date: 09/29/2014
  • Status: Active Grant
First Claim
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1. A coalescing agent for three-dimensional (3D) printing a polymeric build material, the coalescing agent comprising:

  • a co-solvent present in an amount ranging from about 21.5 wt % to about 30 wt % of a total wt % of the coalescing agent;

    a surfactant present in an amount ranging from about 0.5 wt % to about 1.4 wt % of the total wt % of the coalescing agent, the surfactant having a hydrophilic lipophilic balance (HLB) value that is less than 10;

    a carbon black pigment present in an amount ranging from about 3.0 wt % to about 6.0 wt % of the total wt % of the coalescing agent;

    a polymeric dispersant having a weight average molecular weight ranging from about 12,000 to about 20,000; and

    a balance of water.

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