公开(公告)号：US11851563B2

公开(公告)日：2023-12-26

申请号：US17751949

申请日：2022-05-24

Applicant: ASCEND PERFORMANCE MATERIALS OPERATIONS LLC

Inventor： Jacob Ray ,  Chris Schwier ,  Douglas Claire Hoffman ,  Muhamad Fouad

IPC: C08L77/02 ,  C08G69/16 ,  C08G69/46 ,  B01J31/02 ,  B01J27/187

CPC classification number: C08L77/02 ,  C08G69/16 ,  C08G69/46 ,  B01J27/187 ,  B01J31/0258 ,  B01J31/0261

Abstract: A base polyamide composition comprising a nylon mixture having caprolactam units from 1 wppb to 50 wppm catalyst composition; and greater than 0.75 wt % residual caprolactam, wherein the base polyamide composition has a delta end group level ranging from 30 μeq/gram to 90 μeq/gram.

公开(公告)号：US11965275B2

公开(公告)日：2024-04-23

申请号：US17388544

申请日：2021-07-29

Applicant: Ascend Performance Materials Operations LLC

Inventor： Wai-Shing Yung ,  Chris Schwier ,  Albert Ortega ,  Scott E. Osborn

IPC: D01D5/088 ,  D01D5/096 ,  D01D7/00 ,  D01F6/60 ,  D04H3/009 ,  D04H3/16 ,  D01D5/098

CPC classification number: D04H3/16 ,  D01D5/096 ,  D04H3/009 ,  B29C2948/92514 ,  B29C2948/92704 ,  B29C2948/92723 ,  D01D5/0985 ,  D10B2331/02

Abstract: A method for tuning characteristics of a polyamide nanofiber nonwoven comprising the step of targeting a specific average nanofiber diameter and/or a specific relative viscosity for the polyamide nanofiber nonwoven. The specific average nanofiber diameter is within a range from 100 nm to 1000 nm and/or the specific relative viscosity is within a range from 5 to 75, e.g., from 15 to 50. The process further comprises the steps of extruding a polyamide composition having a moisture content with a pressurized gas through a fiber forming channel having a channel temperature to form the polyamide nanofiber nonwoven having the target average nanofiber diameter and/or relative viscosity and controlling the moisture content, the pressure of pressurized gas, and/or the channel temperature based on the specific average nanofiber diameter and/or the specific relative viscosity.

公开(公告)号：US11345815B2

公开(公告)日：2022-05-31

申请号：US16545671

申请日：2019-08-20

Applicant: ASCEND PERFORMANCE MATERIALS OPERATIONS LLC

Inventor： Jacob Ray ,  Chris Schwier ,  Douglas Claire Hoffman ,  Muhamad Fouad

IPC: C08L77/02 ,  C08G69/16 ,  C08G69/46 ,  B01J31/02 ,  B01J27/187

Abstract: A base polyamide composition comprising a nylon mixture having caprolactam units from 1 wppb to 50 wppm catalyst composition; and greater than 0.75 wt % residual caprolactam, wherein the base polyamide composition has a delta end group level ranging from 30 μeq/gram to 90 μeq/gram.

公开(公告)号：US20200002474A1

公开(公告)日：2020-01-02

申请号：US16455344

申请日：2019-06-27

Applicant: Ascend Performance Materials Operations LLC

Inventor： Michael K. Goodin ,  Chris Schwier ,  John J. Tria, JR.

IPC: C08G69/06 ,  C08G69/14

Abstract: The present disclosure relates to processes for producing high molecular weight polyamides from caprolactam. In particular, the present disclosure relates to processes for adding water during Solid State Polymerization (SSP) to remove residual caprolactam to form high molecular weight polyamides, e.g., Nylon 6 and Nylon 6,6 copolymers, having low residual caprolactam monomer content. The water addition step controls the SSP process for a specific time to produce polyamides with a desired molecular weight and low residual caprolactam monomer content.

公开(公告)号：US20220325101A1

公开(公告)日：2022-10-13

申请号：US17751949

申请日：2022-05-24

Applicant: ASCEND PERFORMANCE MATERIALS OPERATIONS LLC

Inventor： Jacob Ray ,  Chris Schwier ,  Douglas Claire Hoffman ,  Muhamad Fouad

IPC: C08L77/02 ,  C08G69/16 ,  C08G69/46

Abstract: A base polyamide composition comprising a nylon mixture having caprolactam units from 1 wppb to 50 wppm catalyst composition; and greater than 0.75 wt % residual caprolactam, wherein the base polyamide composition has a delta end group level ranging from 30 μeq/gram to 90 μeq/gram.

公开(公告)号：US20210355617A1

公开(公告)日：2021-11-18

申请号：US17388544

申请日：2021-07-29

Applicant: Ascend Performance Materials Operations LLC

Inventor： Wai-Shing Yung ,  Chris Schwier ,  Albert Ortega ,  Scott E. Osborn

IPC: D04H3/16 ,  D01D5/096 ,  D04H3/009

Abstract: A method for tuning characteristics of a polyamide nanofiber nonwoven comprising the step of targeting a specific average nanofiber diameter and/or a specific relative viscosity for the polyamide nanofiber nonwoven. The specific average nanofiber diameter is within a range from 100 nm to 1000 nm and/or the specific relative viscosity is within a range from 5 to 75, e.g., from 15 to 50. The process further comprises the steps of extruding a polyamide composition having a moisture content with a pressurized gas through a fiber forming channel having a channel temperature to form the polyamide nanofiber nonwoven having the target average nanofiber diameter and/or relative viscosity and controlling the moisture content, the pressure of pressurized gas, and/or the channel temperature based on the specific average nanofiber diameter and/or the specific relative viscosity.

公开(公告)号：US11111614B2

公开(公告)日：2021-09-07

申请号：US16434918

申请日：2019-06-07

Applicant: Ascend Performance Materials Operations LLC

Inventor： Wai-Shing Yung ,  Chris Schwier ,  Albert Ortega ,  Scott E. Osborn

IPC: D01D5/08 ,  D01F1/02 ,  D01F6/60 ,  D04H3/16 ,  D01D5/096 ,  D04H3/009 ,  D01D5/098

Abstract: A method for tuning characteristics of a polyamide nanofiber nonwoven comprising the step of targeting a specific average nanofiber diameter and/or a specific relative viscosity for the polyamide nanofiber nonwoven. The specific average nanofiber diameter is within a range from 100 nm to 1000 nm and/or the specific relative viscosity is within a range from 5 to 75, e.g., from 15 to 50. The process further comprises the steps of extruding a polyamide composition having a moisture content with a pressurized gas through a fiber forming channel having a channel temperature to form the polyamide nanofiber nonwoven having the target average nanofiber diameter and/or relative viscosity and controlling the moisture content, the pressure of pressurized gas, and/or the channel temperature based on the specific average nanofiber diameter and/or the specific relative viscosity.

公开(公告)号：US10927217B2

公开(公告)日：2021-02-23

申请号：US16283001

申请日：2019-02-22

Applicant: Ascend Performance Materials Operations LLC

Inventor： James P. Sutton ,  John M. Zabcik ,  Chris Schwier ,  Cihan Uzunpinar ,  Shahram Akbari

IPC: C08G69/30 ,  C08G69/28 ,  B01J19/24 ,  B01J19/18 ,  B01D5/00 ,  B01J19/00

Abstract: The present disclosure relates to a process for preparing polymers using a plug flow reactor. The process includes providing an aqueous monomer solution comprising amide monomers; evaporating the aqueous monomer solution to form a concentrated monomer solution; and polymerizing the concentrated monomer solution in a plug flow reactor comprising a shell side and a tube side to form a first process fluid comprising polymers. The concentrated monomer solution flows on the shell side from the inlet to the outlet.

公开(公告)号：US20200062958A1

公开(公告)日：2020-02-27

申请号：US16545671

申请日：2019-08-20

Applicant: ASCEND PERFORMANCE MATERIALS OPERATIONS LLC

Inventor： Jacob Ray ,  Chris Schwier ,  Douglas Claire Hoffman ,  Muhamad Fouad

IPC: C08L77/02 ,  C08G69/16 ,  C08G69/46

Abstract: A base polyamide composition comprising a nylon mixture having caprolactam units from 1 wppb to 50 wppm catalyst composition; and greater than 0.75 wt % residual caprolactam, wherein the base polyamide composition has a delta end group level ranging from 30 neq/gram to 90 neq/gram.