BINDERS AND METHODS OF BINDER JETTING INCLUDING BRANCHED POLYMER BINDERS AND ARTICLES MADE THEREFROM
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United States of America
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Issued Date -
Mar 24, 2022
app pub date -
Mar 25, 2020
filing date -
Mar 25, 2020
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Abstract
Binders and methods of binder jetting are provided based on the use of branched polymer binders. The applicants have found that, even more so than the molecular weight, the ability to achieve higher maximum printable concentrations leads to higher densities and improved structural properties of the manufactured articles. The methods can be used for a variety of articles from metal parts to structural ceramics, to tablets and other oral dosage forms. The branched chain polymers can include a short-chain branched polymer; a long-chained branched polymer; a hyper-branched polymer, a cyclic polymer; a comb-type polymer; a 3-arm star type polymer, a 4-arm star type polymer, a dendritic polymer, and a combination thereof. The branched-chain polymer can include various polymers such as polyvinylpyrrolidone, poly(vinyl alcohol), or poly(acrylic acid).
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