CPC B24B 37/24 (2013.01) [B29C 64/112 (2017.08); B33Y 10/00 (2014.12); B33Y 70/10 (2020.01); C08F 283/008 (2013.01); B29L 2031/736 (2013.01); B33Y 80/00 (2014.12)] | 19 Claims |
1. A method of forming a polishing article, comprising:
depositing a plurality of composite layers with an additive manufacturing system to reach a target thickness, wherein depositing the plurality of composite layers comprises:
dispensing one or more droplets of a curable resin precursor composition onto a support, the curable resin precursor composition comprising:
a first resin precursor component that comprises a radiation curable semi-crystalline aliphatic polycarbonate urethane acrylate oligomer;
a second resin precursor component that comprises an acrylate monomer mixture, comprising:
a monofunctional acrylate monomer selected from isobornyl acrylate, 3,3,5-trimethylcyclohexyl acrylate, tetrahydrofurfuryl acrylate, or combinations thereof; and
a multifunctional acrylate monomer selected from dipropylene glycol diacrylate, 1,4-butanediol diacrylate, 1,3-butanediol diacrylate, or combinations thereof, wherein the acrylate monomer mixture is present from 70% to 80% by weight based on a total weight of the curable resin precursor composition; and
a photoinitiator present from 0.5% to 2.5% based on the total weight of the curable resin precursor composition,
wherein the curable resin precursor composition has a viscosity within a range from about 10 cP to about 30 cP at 70 degrees Celsius that enables the curable resin precursor composition to be dispensed to form a portion of the polishing article by the additive manufacturing system.
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