Eastman Chemical Company

Amit Vasant Desai

David Scott Porter

Wentao Li

Steven J Adams

Sarah Exley Goetz

Aireal Denise Pressley

Yue Rachel Hu

Steven Frederick Wright

Andrew Thomas Detwiler

Everett B Shepard

A build material for additive manufacturing applications is disclosed. The build material includes a build composition in powder form. The build composition includes a semi-crystalline polymer having a glass transition temperature of at least 60&#xb0; C. as measured by DSC and a minimum crystallization half-time of greater than 100 minutes as measured by SALS. A semi-crystalline polymer useful in additive manufacturing applications, an additive manufacturing method for producing a three-dimensional object and an additive-manufactured polymer article are also described.

Build materials for additive manufacturing applications

A semi-crystalline polyester comprising a repeat unit of the formula: wherein A is an aliphatic, aromatic, or heterocyclic group; Ris selected from the group consisting of 1,4-butanediol residue and 1,4-cyclohexanedimethanol residue; Ris neopentanediol residue; m is between 50 and 99 inclusive; n is between 1 and 50 inclusive; x is between 1 and 200 inclusive; and wherein said semi-crystalline polyester exhibits a minimum crystallization half-time of about 0.3 minutes or greater, or about 0.5 minutes or greater or about 0.6 minutes or greater or about 0.7 minutes or greater is described. The polyesters of the present invention may in various embodiments demonstrate one or more desirable performance characteristics and accordingly are particularly useful in applications and utilities wherein those high levels of performance for such characteristics are required. A process for forming the semi-crystalline polyester is also disclosed.

Polyesters with specified crystallization half-times

Growing community of inventors

Houston, TX, United States of America

Amit Vasant Desai