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:
Nov. 25, 2025
Filed:
Sep. 16, 2021
Reckitt Benckiser Health Limited, Berkshire, GB;
Abstract
The present invention provides a waterborne polyurethane condom having a high burst volume and a preparation method thereof. The method comprises the steps of: providing a waterborne polyurethane; dipping into the waterborne polyurethane and then drying, and repeating the process of dipping into the waterborne polyurethane and then drying for N times so as to obtain a waterborne polyurethane film; rolling up an end of the waterborne polyurethane film and then drying; dipping into a releasing agent, followed by drying, mold releasing, and electrical inspection to obtain a waterborne polyurethane condom; wherein N is equal to 1-5, the waterborne polyurethane is an anionic waterborne polyurethane, and the waterborne polyurethane has a 100% tensile modulus of less than or equal to 2.0 Mpa and an elongation at break of greater than or equal to 650%; the polyurethane condom prepared by the method has a burst volume of greater than 12 L, a burst pressure of greater than 1 KPa, and a 100% tensile modulus of less than or equal to 2.0 MPa.