Polyeste powder compositions, methods and articles
AssigneeValspar Sourcing, Inc.
InventorRaffaele Martinoni
Life of this patent
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Abstract
Powder compositions and articles and methods of forming articles from powder compositions are provided. In one embodiment the powder compositions include at least one polyester polymer powder and an amount of reinforcing particles having an aspect ratio of preferably at least about 5:1. In another embodiment the powder compositions include at least one medium-high melting temperature, aromatic and crystalline polyester polymer powder. In a preferred embodiment, the powder composition is capable of being formed, via a laser sintering process, into a three-dimensional article that exhibits one or more desirable mechanical properties in an elevated temperature environment.
Claims30
A method comprising:
- providing a powder composition including at least one semi-crystalline or crystalline laser-sinterable polyester polymers including more than 95% by weight of polyester units, wherein the at least one semi-crystalline or crystalline laser-sinterable polyester polymers has a melting temperature from greater than 150 to 190° C. and a glass transition temperature between −30 and 80° C.;
- and
- selectively laser sintering the powder composition to form a three-dimensional article.
A method comprising:
- providing a powder composition including at least one semi-crystalline or crystalline laser-sinterable polyester polymers including more than 95% by weight of polyester units and having a melting temperature between 150 and 220° C., wherein the at least one semi-crystalline or crystalline laser-sinterable polyester polymers includes units derived from:
- one or more of terephthalic acid, isophthalic acid, dimethyl terephthalate, or dimethyl isophthalate;
- and
- one or more of ethylene glycol, adipic acid, or 1,3 propane diol;
- and
- selectively laser sintering the powder composition to form a three-dimensional article.
A method comprising:
- providing a powder composition including at least one semi-crystalline or crystalline laser-sinterable polyester polymers having a melting temperature between 150 and 220° C., wherein the powder composition has an elastic modulus, when formed into laser sintered ISO 3167 Type 1A multipurpose dog-bone test specimens and tested pursuant to ISO 527, of at least 200 MPa;
- and
- selectively sintering the powder composition to form a three-dimensional article.
Dependencies are inferred from the claim text.