Catalyst-free curable compositions based on silane-functional polymers

US11891546B2 · kind B2 · utility

Assignee

• SIKA TECHNOLOGY AG · CH

Inventors

• Klaas MENNECKE · Nackermühle, DE
• Marcel Oertli · Bellinzona, CH

Key dates

• Filing date: Jun 24, 2019
• Grant date: Feb 6, 2024
• Expiry date: Mar 11, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/1804
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A moisture-curable composition, including at least one polymer P containing reactive silane groups; between 0.1 and 5 wt.-%, based on the total composition, of at least one organosilane OS of the formula (I), wherein R20 independently stands for a monovalent, optionally cyclic or branched, hydrocarbyl or heterocarbyl radical, optionally comprising aromatic moieties, which contains 1 to 12 carbon atoms and wherein the carbon atom next to the silicon atom either bonds via a C═C double bond to another carbon atom or bonds to a heteroatom selected from O, N, and S; R21 independently stands for a linear, cyclic, or branched divalent hydrocarbyl radical having 2 to 12 carbon atoms and optionally containing aromatic moieties; R22 stands for a hydrogen atom or a group of the formula (Ia); characterized in that the curable composition does not contain catalytically active organometallic or acidic compounds.