公开(公告)号：US11643498B2

公开(公告)日：2023-05-09

申请号：US16483670

申请日：2017-02-24

Applicant: MIRACLL CHEMICALS CO., LTD.

Inventor： Heilong Wang ,  Hongwei Song ,  Defu Liu ,  Sheng Zhang ,  Renhong Wang

IPC: C08G18/61 ,  B29B9/06 ,  C08G18/24 ,  C08G18/32 ,  C08G18/40 ,  C08G18/42 ,  C08G18/48 ,  C08G18/66 ,  C08G18/75 ,  C08G18/76 ,  B29K75/00 ,  B29K83/00

CPC classification number: C08G18/61 ,  B29B9/065 ,  C08G18/242 ,  C08G18/3206 ,  C08G18/3212 ,  C08G18/4009 ,  C08G18/4238 ,  C08G18/4833 ,  C08G18/4854 ,  C08G18/664 ,  C08G18/6674 ,  C08G18/758 ,  C08G18/7621 ,  C08G18/7671 ,  B29K2075/00 ,  B29K2083/00

Abstract: The present invention relates to a thermoplastic silicone-polyurethane elastomer and a method for preparing the same. The elastomer is prepared from raw materials comprising: 25-80 parts of a macromolecular polyol, 0-60 parts of a silicone oil or a liquid silicone rubber, 10-50 parts of a diisocyanate, 3-20 parts of a small molecular diol as a chain extender, and 0.1-3 parts of an auxiliary agent. The macromolecular polyol is selected from a silicon-free polyol having a molecular weight of between 1,000 and 4,000 g/mol and a polyol modified by silicone through copolymerization or grafting. The small molecular diol is a small molecular diol comprising 10 or less carbon atoms. The thermoplastic silicone-polyurethane elastomer of the present invention has the following excellent performance parameters: a hardness of Shore A40-D80; a tensile strength ≥5 MPa; smooth hand feeling; resistance to dirt such as dust; resistance to liquid permeation; no irritation to skin; good encapsulation effect on PC, ABS, TPU and the like; and a 180° peel strength >25 N/25 mm.