公开(公告)号：US20200010627A1

公开(公告)日：2020-01-09

申请号：US16482490

申请日：2018-01-25

Applicant: BASF SE

Inventor： SIMON GRAMLICH ,  Thomas MEIER ,  Claus GABRIEL ,  Natalie HERLE

IPC: C08J3/14 ,  B33Y70/00 ,  B29C64/314 ,  B33Y40/00 ,  C08J3/20

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).

公开(公告)号：US20180009944A1

公开(公告)日：2018-01-11

申请号：US15545546

申请日：2016-01-22

Applicant: BASF SE

Inventor： SIMON GRAMLICH ,  Achim STAMMER ,  Angela ULZHÕFER

IPC: C08G65/46 ,  C07D207/267 ,  C07C233/05

CPC classification number: C08G65/46 ,  C07C233/05 ,  C07D207/267

Abstract: A method for desalinating a salt-containing polymer (SP) comprising a polyaryl ether having a softening temperature TS and a salt (S), comprising the steps of a) providing the salt-containing polymer (SP) at a first temperature T1 above the softening temperature TS of the polyaryl ether, b) contacting the salt-containing polymer (SP) provided in step a) with an extractant (E) to obtain a desalinated polymer (DP) comprising the polyaryl ether, and a salt-containing extractant (SE) comprising the extractant (E) and the salt (S).