公开(公告)号：US11141913B2

公开(公告)日：2021-10-12

申请号：US16645903

申请日：2018-09-21

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Elena Miloskovska ,  Bruke Jofore

IPC: B29C64/153 ,  B29C64/357 ,  B33Y10/00 ,  B33Y40/10 ,  C08G64/06 ,  C08G73/10 ,  B33Y70/00

Abstract: A composition for use in powder bed fusion includes a thermoplastic powder that itself includes an induced crystalline polycarbonate or an induced crystalline polyetherimide. The thermoplastic powder is recycled powder, which means that it is recovered from a powder bed that had undergone a powder bed fusion process. Also described is a method of making an article, the method including: placing an induced crystalline polymeric (polycarbonate or polyetherimide) powder in a powder bed, fusing a portion of the induced crystalline polymeric powder in the powder bed, recovering a least a portion of the crystalline polymeric powder from the powder bed, wherein the recovered powder is not fused, placing the recovered induced crystalline polymeric powder in a second powder bed, and fusing at least a portion of the recovered induced crystalline polymeric powder in the second powder bed to form an amorphous polymer article.

公开(公告)号：US20200087513A1

公开(公告)日：2020-03-19

申请号：US16471865

申请日：2017-12-22

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Brain Gray Price ,  Elena Miloskovska ,  Bruke Jofore ,  Raul Fernandez Cabello ,  Hao Gu ,  Vandita Pai-Paranjape ,  Viswanathan Kalyanaraman

IPC: C08L79/08 ,  B29C64/153 ,  B29C64/245 ,  B29C64/264

Abstract: Provided are amorphous and at least partially crystalline polyetherimide compositions having a comparatively narrow particle size distribution and are particularly suited for additive manufacturing processes. The compositions comprise a population of polyetherimide particulates are characterized as having a zero-shear viscosity sufficiently low so as to achieve a coalescence of at least 0.5, and preferably of about 1.0, as characterized by the Frenkel model at a temperature less than 450° C.

公开(公告)号：US10081713B2

公开(公告)日：2018-09-25

申请号：US15039474

申请日：2014-12-30

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Franciscus Maria Huijs ,  Elena Miloskovska

IPC: C08L63/00 ,  C08J5/04 ,  C08J5/06

CPC classification number: C08J5/042 ,  C08J5/06 ,  C08J2379/08

Abstract: Described herein is a composite comprising a matrix comprising a polymeric material; and at least one sized fiber selected from the group consisting of polyetherimide-sized fibers, epoxy-sized fibers, and combinations thereof.

公开(公告)号：US11352498B2

公开(公告)日：2022-06-07

申请号：US16471865

申请日：2017-12-22

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Brian Gray Price ,  Elena Miloskovska ,  Bruke Jofore ,  Raul Fernandez Cabello ,  Hao Gu ,  Vandita Pai-Paranjape ,  Viswanathan Kalyanaraman

IPC: B29C64/264 ,  B29C64/153 ,  B29C64/245 ,  B33Y10/00 ,  B33Y70/00 ,  C08L79/08

Abstract: Provided are amorphous and at least partially crystalline polyetherimide compositions having a comparatively narrow particle size distribution and are particularly suited for additive manufacturing processes. The compositions comprise a population of polyetherimide particulates are characterized as having a zero-shear viscosity sufficiently low so as to achieve a coalescence of at least 0.5, and preferably of about 1.0, as characterized by the Frenkel model at a temperature less than 450° C.

公开(公告)号：US11230646B2

公开(公告)日：2022-01-25

申请号：US16341310

申请日：2017-10-11

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Vandita Pai-Paranjape ,  Elena Miloskovska ,  Bruke Jofore ,  Raul Fernandez Cabello ,  Hao Gu

IPC: C09D11/102 ,  B29C64/153 ,  B29K69/00 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y30/00 ,  B33Y80/00

Abstract: Provided are compositions comprising partially crystalline polycarbonate particulate having an average cross-sectional dimension of from about 1 μιη to about 200 μιτι, having from about 10% crystallinity to about 50% crystallinity, and having a weight-average molecular weight, per polystyrene standards, of from about 17,000 to about 40,000 Daltons. The composition exhibits a zero-shear viscosity of less than about 104 Pa s at the melting temperature of the partially crystalline polycarbonate. Related systems and methods for utilizing these compositions in additive manufacturing applications, including selective laser sintering (SLS) applications, are also disclosed. Also provided are additively-manufactured articles made with the disclosed compositions and according to the disclosed methods.

公开(公告)号：US20200276753A1

公开(公告)日：2020-09-03

申请号：US16645903

申请日：2018-09-21

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Elena Miloskovska ,  Bruke Jofore

IPC: B29C64/153 ,  C08G64/06 ,  C08G73/10 ,  B29C64/357

Abstract: A composition for use in powder bed fusion includes a thermoplastic powder that itself includes an induced crystalline polycarbonate or an induced crystalline polyetherimide. The thermoplastic powder is recycled powder, which means that it is recovered from a powder bed that had undergone a powder bed fusion process. Also described is a method of making an article, the method including: placing an induced crystalline polymeric (polycarbonate or polyetherimide) powder in a powder bed, fusing a portion of the induced crystalline polymeric powder in the powder bed, recovering a least a portion of the crystalline polymeric powder from the powder bed, wherein the recovered powder is not fused, placing the recovered induced crystalline polymeric powder in a second powder bed, and fusing at least a portion of the recovered induced crystalline polymeric powder in the second powder bed to form an amorphous polymer article.