The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 17, 2023
Filed:
Apr. 09, 2020
Shanghai Pujia Drilling Technology Co., Ltd., Shanghai, CN;
Dingyu Guo, Calgary, CA;
Hongrui Zhang, Tianjin, CN;
Minghui Zhu, Shanghai, CN;
Yiran Liu, Xuzhou, CN;
Zhuanrui Liu, Xuzhou, CN;
Paul Kwong Shun Cheung, Calgary, CA;
Xiaobo Liu, Chengdu, CN;
SHANGHAI PUJIA DRILLING TECHNOLOGY CO., LTD., Shanghai, CN;
Abstract
A prepolymer of elastomer material for screw drilling tools and a preparation method thereof are provided. The prepolymer includes component A and component B, wherein the component A includes hydroxyl-terminated liquid rubber, polytetrahydrofuran diol, and polyether polyol; the component B includes at least one of an isocyanate, a cyanate, and a cyano compound; the mass ratio of the hydroxyl-terminated liquid rubber, polytetrahydrofuran diol, and polyether polyol is (0.2-1.0): (0.2-1.0): (0.2-1.0). Different molecular segments of different proportions are introduced through structural design, such that the molecular structure of the prepolymer has both rigid and flexible segments, thus to achieve an adjustable and controllable structure of the prepolymer; and the introduction of active groups makes the prepolymer to show good reactivity and processability. Therefore, a reactive elastomer material having excellent properties such as hardness, tear strength, and tensile strength can be obtained used as an elastomer material for screw drilling tools.