公开(公告)号：US20230201429A1

公开(公告)日：2023-06-29

申请号：US18175628

申请日：2023-02-28

Applicant: SUZHOU INNOTECH MEDICAL TECHNOLOGY CO.,LTD.

Inventor： Chen SHI ,  Robbie Yi SUN

IPC: A61L31/08 ,  C23C22/22 ,  B05D1/00 ,  B05D3/10 ,  A61L31/02 ,  A61L31/16 ,  A61L31/10

CPC classification number: A61L31/086 ,  A61L31/10 ,  A61L31/16 ,  A61L31/022 ,  B05D1/62 ,  B05D3/102 ,  C23C22/22 ,  A61L2420/02 ,  A61L2420/08 ,  A61L2430/02

Abstract: A coating with strong adhesion for medical magnesium alloys, including a magnesium phosphate or calcium phosphate layer as an inner layer and a hydrophobic polymer layer as an outer layer. The inner layer is attached to the medical magnesium alloy; and the outer layer is attached to the inner layer. A preparation method of the coating is also provided, including: (S1) carrying out surface treatment on a medical magnesium alloy substrate; (S2) preparing a solution including magnesium salt/calcium salt and phosphoric acid/phosphate followed by pH adjustment and heating; (S3) soaking the medical magnesium alloy substrate in the solution followed by washing and drying to obtain a magnesium phosphate/calcium phosphate layer-coated medical magnesium alloy sample; and (S4) depositing a hydrophobic polymer layer on the medical magnesium alloy sample through chemical vapor deposition (CVD).

公开(公告)号：US20230212755A1

公开(公告)日：2023-07-06

申请号：US18175609

申请日：2023-02-28

Applicant: SUZHOU INNOTECH MEDICAL TECHNOLOGY CO.,LTD.

Inventor： Chen SHI ,  Robbie Yi SUN

IPC: C23C22/08 ,  C23C22/82

CPC classification number: C23C22/08 ,  C23C22/82

Abstract: A surface coating for degradable magnesium and magnesium alloys, including: an inner layer and an outer layer. The inner layer is a magnesium phosphate conversion layer, and the outer layer is a hydroxyapatite layer. A method for fabricating the surface coating is also provided herein, which includes: soaking the magnesium or magnesium alloy in an acidic solution containing magnesium salt and phosphate under heating to form the magnesium phosphate conversion layer on a surface of the magnesium or magnesium alloy; and transferring the magnesium or magnesium alloy to an alkaline solution containing calcium salt and phosphate followed by soaking under heating to form a hydroxyapatite layer on a surface of the magnesium phosphate conversion layer.