公开(公告)号：US20210331385A1

公开(公告)日：2021-10-28

申请号：US17051941

申请日：2019-01-18

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Tienteh Chen ,  Allen Jin ,  Kenneth Flack

IPC: B29C64/165 ,  B33Y70/00 ,  B33Y10/00 ,  C08G18/32 ,  B29C64/194 ,  C08G18/10

Abstract: A materials kit for three-dimensional (3D) printing can include a powder bed material comprising thermoplastic polyurethane particles and a fusing agent including a radiation absorber to selectively apply to the powder bed material. The thermoplastic polyurethane particles can have an average particle size from about 20 μm to about 120 μm and a melting temperature of from about 100° C. to about 250° C., wherein the thermoplastic polyurethane particles include polyurethane polymer strands having an average of about 10 wt % to about 30 wt % hard segments based on a total weight of the thermoplastic polyurethane particles. The hard segments can include a symmetrical aliphatic diisocyanate and a symmetrical aliphatic chain extender that are polymerized into the thermoplastic polyurethane particles.

公开(公告)号：US10005876B2

公开(公告)日：2018-06-26

申请号：US15544494

申请日：2015-01-30

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Tienteh Chen ,  Bin Huang

IPC: C08G18/75 ,  C08G18/65 ,  C08G18/62 ,  C09D11/38 ,  C08G18/38 ,  C08G18/34 ,  C08G18/10 ,  C09D11/30 ,  C09D175/04

CPC classification number: C08G18/755 ,  B01F17/005 ,  C08G18/0823 ,  C08G18/10 ,  C08G18/348 ,  C08G18/3857 ,  C08G18/6225 ,  C08G18/6245 ,  C08G18/6541 ,  C09D11/102 ,  C09D11/322 ,  C09D11/38 ,  C09D11/40 ,  C09D11/54 ,  C08G18/282

Abstract: A binder dispersion includes water and polyurethane. The polyurethane is formed from polyisocyanate; polyol having two hydroxyl (OH) groups at one chain end, no OH groups at an opposed chain end, and a number average molecular weight (Mn) ranging from ˜500-˜5,000; an alcohol, diol or amine having a Mn