Patent · US Active

Process for producing a polyamide powder by precipitation

US11697716B2 · kind B2 · utility

0Cited by

5References

15Claims

0Family size

Assignee

BASF SE (Ellwanger & Baier Patentanwälte) · DE

Inventors

Simon Gramlich · Ludwigshafen am Rhein, DE
Thomas Meier · Cherbourg, FR
Claus Gabriel · Ludwigshafen am Rhein, DE
Natalie Beatrice Janine Herle · Ludwigshafen am Rhein, DE

Key dates

Filing date	Jan 25, 2018
Grant date	Jul 11, 2023
Priority date	—
Expiry date	Jul 3, 2040

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2377/02
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The present invention relates to a process for producing a polyamide powder (PP) comprising at least one semicrystalline polyamide (P) and at least one additive (A). The semicrystalline polyamide (P) and the at least one additive (A) are initially compounded with one another in an extruder and subsequently introduced into a solvent (SV) in which the at least one semicrystalline polyamide (P) then crystallizes to obtain the polyamide powder (PP). The present invention further relates to the thus obtainable polyamide powder (PP) and to the use of the polyamide powder (PP) as sintering powder (SP) and also to a process for producing a shaped body by selective laser sintering of a polyamide powder (PP).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.