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:
Aug. 17, 2021
Filed:
Jun. 25, 2019
Shenzhen University, Guangdong, CN;
Shaojun Chen, Guangdong, CN;
Shuqin Fu, Guangdong, CN;
SHENZHEN UNIVERSITY, Shenzhen, CN;
Abstract
The present disclosure provides a preparation method of a shape memory polyurethane, which comprising: reacting 1,3,5,7-tetrahydroxyadamantane, ε-caprolactone, a catalyst and a solvent for 20-50 hours under the conditions of inert gas and 70° C. to 130° C. to obtain adamantyl star poly(ε-caprolactone), wherein the mole ratio of the 1,3,5,7-tetrahydroxyadamantane to the ε-caprolactone is 1:(40-240); mixing the adamantyl star poly(ε-caprolactone) with long-chain diol and diisocyanate, adding the catalyst and the solvent, and reacting for 3-9 hours at 50-100° C. to obtain an isocyanate-terminated polyurethane prepolymer, wherein the mass ratio of the adamantyl star poly(ε-caprolactone) to the long-chain diol is 9:1-1:9; and adding a linking agent in the polyurethane prepolymer so that the linking agent reacts with isocyanate in the polyurethane prepolymer to obtain an adamantyl cross-linked shape memory polyurethane.