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. 19, 2025
Filed:
May. 24, 2021
Sika Technology Ag, Baar, CH;
Daisuke Tsushima, Kanagawa, JP;
Kazunori Ishikawa, Kanagawa, JP;
SIKA TECHNOLOGY AG, Baar, CH;
Abstract
A two-part urethane adhesive composition includes a main agent containing a filler and a urethane prepolymer having an isocyanate group and formed from a polyisocyanate A and a polyol 1 with two to three hydroxy groups per molecule and a number-average molecular weight of ≥1800. Isocyanate group content in the main agent is ≥5 mass % of a main agent total content. The composition includes a curing agent containing a polyoxyalkylene polyol, a polyol 2, a urethanization reaction catalyst, a filler, and zeolite, the polyoxyalkylene polyol having two to three hydroxy groups per molecule and having a number-average molecular weight of ≥1800, the polyol 2 having two or more hydroxy groups per molecule and having a number-average molecular weight of ≤200. The urethanization reaction catalyst contains an organic tin catalyst, and an amine catalyst represented by Formula (1) or an amine catalyst blocked with an acid.