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:
Jun. 25, 2019
Filed:
Feb. 01, 2016
3m Innovative Properties Company, St. Paul, MN (US);
Lianzhou Chen, Woodbury, MN (US);
Jay S. Schlechte, Oakdale, MN (US);
George S. Stout, Maplewood, MN (US);
Rachel J. Squires, Stillwater, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A two-part adhesive is provided comprising: A) a curative part comprising: i) an epoxy curative; and ii) a reaction intermediate which is the reaction product of a suspension of core/shell rubber nanoparticles in a liquid epoxy resin and an excess of the epoxy curative; wherein the curative part comprises greater than 1.1 wt % core/shell rubber nanoparticles; and B) an epoxy part comprising: iii) a liquid epoxy resin; and iv) greater than 9.1 wt % core/shell rubber nanoparticles. In some embodiments, the epoxy part additionally comprises greater than 5.1 wt % solid epoxy resin, such as, e.g., triglycidyl ether of trisphenol-methane. In some embodiments, the sum of the wt % solid epoxy resin and the wt % core/shell rubber nanoparticles in the epoxy part is greater than 41.0%. In some embodiments, the sum of the wt % solid epoxy resin and the wt % core/shell rubber nanoparticles in the mixed adhesive is greater than 26.0%.